What are the cheapest airlines flying from Chicago to Sydney round-trip?

Cheapflights users have booked flights from Chicago to Sydney round-trip from $1,357. Other airlines that can offer you cheap pricing are American Airlines, from $1,371, and British Airways, from $1,378. Qantas Airways is currently priced 32% below the average price you’ll pay for this route. Find deals

What are the cheapest airlines to fly from Chicago to Sydney one-way?

$662 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Qantas Airways and Fiji Airways, with prices starting from $696 and $907, respectively. Find deals

What is the cheapest day to fly from Chicago to Sydney?

Travellers seeking maximum savings on their Chicago to Sydney flight should consider departing on Sunday afternoons when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from Chicago to Sydney?

The most popular airlines flying from Chicago to Sydney are Air Canada, Qantas Airways and United Airlines. Something to consider prior to booking your flight.

What is the cheapest day to fly return from Chicago to Sydney?

Saturday is generally a great day to depart. Flying on this day could help you save up to 37%.

How far in advance should I book a flight from Chicago to Sydney?

Travellers have found it’s best to book a flight 47 days in advance to save up to 48% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 47 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Chicago to Sydney 1-2 weeks in advance for as low as $1,592, or $2,192 for flights within the next 24 hours.

What is the cheapest month to fly from Chicago to Sydney?

Flights from Chicago to Sydney lean towards being more expensive in December. Prices are generally better when you fly from Chicago to Sydney in March, with the cheapest ticket starting at $1,360.

What airport do you fly into for flights to Sydney from Chicago?

For a flight from Chicago to Sydney, you will be flying into Kingsford Smith. Sydney Kingsford Smith (SYD) is just 7.5 km from the centre vof the city. Kingsford Smith is the only Sydney airport and it handles 0 inbound flights from Chicago per day. 3 airlines have flights to Sydney Kingsford Smith from Chicago on a regular basis.

Can I find deals for flights from Chicago to Sydney that include hotel bookings?

Yes. In addition to deals on Chicago to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Chicago to Sydney?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Sydney.

Can I find deals for business class flights from Chicago to Sydney?

Yes. Cheapflights offers flight deals from Chicago to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$662+ Flights from Chicago to Sydney

The best prices from Chicago to Sydney Kingsford Smith are usually found in March or February, booked 82 days in advance, depart on a Sunday or Monday and return on a Tuesday

Cheap flight deals from Chicago to Sydney

Round-trip from	$1,357
One-way from	$662
Popular in	December
Cheapest in	March
Average price	$1,850

Qantas Airways
4/2-10/2
2 total stops
45h 43m total
Chicago to Sydney

Search Deals

American Airlines
30/1
2 total stops
25h 12m total
Chicago to Sydney

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($185 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($61 potential savings vs. average return price).

Search Deals

Average for round-trip flights in January 2025

Search Deals

Find flight deals from Chicago to Sydney

Cheapest flights from Chicago to Sydney
Explore the most affordable flight options available from Chicago to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2025.

Tue 4/215:22ORD - SYD

1 stop22h 13mQantas Airways

Mon 10/211:15SYD - ORD

1 stop23h 30mQantas Airways

Deal found 20/1$1,357

Mon 17/310:15ORD - SYD

2 stops29h 10mAmerican Airlines

Tue 25/321:25SYD - ORD

1 stop25h 08mAmerican Airlines

Deal found 21/1$1,371

Sun 9/314:13ORD - SYD

1 stop25h 12mBritish Airways

Sun 23/321:25SYD - ORD

1 stop25h 08mBritish Airways

Deal found 20/1$1,378

Sat 25/115:20ORD - SYD

1 stop24h 40mMultiple Airlines

Mon 27/111:50SYD - ORD

1 stop20h 39mMultiple Airlines

Deal found 21/1$1,414

Fri 9/507:00ORD - SYD

2 stops45h 15mANA

Fri 23/511:50SYD - ORD

2 stops47h 35mANA

Deal found 21/1$1,475

Fri 7/312:49MDW - SYD

3 stops54h 41mMultiple Airlines

Fri 14/306:15SYD - MDW

3 stops39h 16mMultiple Airlines

Deal found 21/1$1,635

Tue 11/216:55ORD - SYD

2 stops26h 35mFiji Airways

Tue 24/613:15SYD - ORD

2 stops22h 08mFiji Airways

Deal found 21/1$1,848

Sun 11/514:00MDW - SYD

2 stops25h 35mDelta

Wed 28/509:25SYD - MDW

2 stops27h 21mDelta

Deal found 21/1$2,349

Tue 13/509:30MDW - SYD

2 stops29h 50mKorean Air

Sat 24/507:55SYD - MDW

2 stops43h 35mKorean Air

Deal found 21/1$3,646

Sun 23/306:00MDW - SYD

2 stops56h 30mLATAM Airlines

Fri 4/412:50SYD - MDW

3 stops36h 17mLATAM Airlines

Deal found 21/1$5,925

Sun 16/218:59MDW - SYD

2 stops42h 36mWestJet

Sat 22/220:30SYD - MDW

2 stops57h 12mWestJet

Deal found 21/1$11,696

Best flights from Chicago to Sydney
Discover carefully curated flight deals from Chicago to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 22 January 2025.

Tue 4/215:22ORD - SYD

1 stop22h 13mQantas Airways

Mon 10/211:15SYD - ORD

1 stop23h 30mQantas Airways

Deal found 20/1$1,357

Mon 17/310:15ORD - SYD

2 stops29h 10mAmerican Airlines

Tue 25/321:25SYD - ORD

1 stop25h 08mAmerican Airlines

Deal found 21/1$1,371

Sun 9/314:13ORD - SYD

1 stop25h 12mBritish Airways

Sun 23/321:25SYD - ORD

1 stop25h 08mBritish Airways

Deal found 20/1$1,378

Sat 25/115:20ORD - SYD

1 stop24h 40mMultiple Airlines

Mon 27/111:50SYD - ORD

1 stop20h 39mMultiple Airlines

Deal found 21/1$1,414

Tue 11/216:55ORD - SYD

2 stops26h 35mFiji Airways

Tue 24/613:15SYD - ORD

2 stops22h 08mFiji Airways

Deal found 21/1$1,848

Tue 4/207:20ORD - SYD

3 stops33h 15mAir Canada

Wed 19/211:20SYD - ORD

2 stops37h 37mAir Canada

Deal found 21/1$1,994

Mon 17/313:16MDW - SYD

2 stops26h 29mDelta

Tue 25/310:05SYD - MDW

2 stops23h 57mDelta

Deal found 21/1$2,349

Fri 7/312:49MDW - SYD

3 stops54h 41mMultiple Airlines

Fri 14/306:15SYD - MDW

3 stops39h 16mMultiple Airlines

Deal found 21/1$1,635

Sun 23/306:00MDW - SYD

2 stops56h 30mLATAM Airlines

Fri 4/412:50SYD - MDW

3 stops36h 17mLATAM Airlines

Deal found 21/1$5,925

Sun 16/218:59MDW - SYD

2 stops42h 36mWestJet

Sat 22/220:30SYD - MDW

2 stops57h 12mWestJet

Deal found 21/1$11,696

Last-minute flights from Chicago to Sydney
Discover last-minute flight deals from Chicago to Sydney. Data last updated 22 January 2025 and is based on user searches.

Tue 21/118:55ORD - SYD

3 stops31h 50mAlaska Airlines

Tue 28/121:40SYD - ORD

2 stops33h 23mAlaska Airlines

Deal found 20/1$2,707

Thu 23/115:20ORD - SYD

1 stop23h 05mBritish Airways

Wed 5/217:25SYD - ORD

1 stop41h 20mBritish Airways

Deal found 21/1$1,389

Sat 25/115:20ORD - SYD

1 stop24h 40mMultiple Airlines

Mon 27/111:50SYD - ORD

1 stop20h 39mMultiple Airlines

Deal found 21/1$1,414

Sun 26/114:05ORD - SYD

2 stops26h 30mAir Canada

Sun 9/211:20SYD - ORD

3 stops37h 45mAir Canada

Deal found 21/1$2,651

Sun 26/110:34ORD - SYD

3 stops29h 11mMultiple Airlines

Sun 9/206:00SYD - ORD

3 stops34h 13mMultiple Airlines

Deal found 21/1$3,294

Mon 27/120:30ORD - SYD

2 stops53h 30mTurkish Airlines

Fri 7/221:00SYD - ORD

2 stops54h 10mTurkish Airlines

Deal found 20/1$9,542

Tue 28/116:55ORD - SYD

2 stops26h 35mFiji Airways

Sat 8/214:30SYD - ORD

2 stops21h 50mFiji Airways

Deal found 21/1$11,237

Tue 28/116:25ORD - SYD

1 stop25h 05mANA

Sat 8/221:45SYD - ORD

1 stop26h 35mANA

Deal found 21/1$14,411

Tue 28/111:00ORD - SYD

1 stop28h 10mAir India

Sat 8/220:30SYD - ORD

1 stop51h 00mAir India

Deal found 21/1$14,813

Fri 31/112:44MDW - SYD

2 stops26h 51mDelta

Sun 16/211:05SYD - MDW

2 stops28h 15mDelta

Deal found 21/1$2,909

Sun 2/212:45ORD - SYD

1 stop24h 35mUnited Airlines

Tue 25/216:15SYD - ORD

1 stop20h 48mUnited Airlines

Deal found 21/1$2,808

Tue 4/215:22ORD - SYD

1 stop22h 13mQantas Airways

Mon 10/211:15SYD - ORD

1 stop23h 30mQantas Airways

Deal found 20/1$1,357

One-way flights from Chicago to Sydney
Search for one-way flight options from Chicago to Sydney. Find affordable one-way fares based on user searches. Data last updated 22 January 2025.

Thu 30/113:13ORD - SYD

2 stops25h 12mAmerican Airlines

Deal found 21/1$662

Tue 25/315:16ORD - SYD

2 stops26h 54mMultiple Airlines

Deal found 21/1$678

Mon 27/114:14ORD - SYD

1 stop25h 46mQantas Airways

Deal found 21/1$696

Sat 15/205:10MDW - SYD

2 stops38h 20mMultiple Airlines

Deal found 21/1$749

Tue 1/418:45ORD - SYD

2 stops26h 00mFiji Airways

Deal found 21/1$907

Wed 5/317:54ORD - SYD

3 stops32h 51mAlaska Airlines

Deal found 21/1$1,126

Tue 1/407:20ORD - SYD

3 stops33h 00mAir Canada

Deal found 21/1$1,147

Thu 13/310:25MDW - SYD

2 stops29h 20mDelta

Deal found 21/1$1,446

Fri 7/307:30ORD - SYD

1 stop30h 30mUnited Airlines

Deal found 20/1$1,578

Mon 3/212:39ORD - SYD

3 stops48h 56mChina Southern

Deal found 21/1$1,669

Tue 28/117:40ORD - SYD

3 stops31h 00mAir Tahiti Nui

Deal found 21/1$2,051

Mon 14/417:45ORD - SYD

1 stop34h 30mANA

Deal found 21/1$5,173

Find flights from Chicago to Sydney within your budget

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 4/2

15:22-06:35

1 stop22h 13m

Sydney Kingsford Smith

Mon 10/2

11:15-17:45

1 stop23h 30m

$1,357

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 17/3

12:05-06:35

1 stop26h 30m

Sydney Kingsford Smith

Tue 25/3

21:25-06:33

1 stop25h 08m

$1,371

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 9/3

14:13-07:25

1 stop25h 12m

Sydney Kingsford Smith

Sun 23/3

21:25-06:33

1 stop25h 08m

$1,378

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 25/1

15:20-09:00

1 stop24h 40m

Sydney Kingsford Smith

Mon 27/1

11:50-15:29

1 stop20h 39m

$1,414

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Fri 7/3

12:49-12:30

3 stops54h 41m

Sydney Kingsford Smith

Fri 14/3

06:15-05:31

3 stops39h 16m

$1,635

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 11/2

16:55-12:30

2 stops26h 35m

Sydney Kingsford Smith

Tue 24/6

13:15-20:23

2 stops22h 08m

$1,848

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 4/2

07:20-09:35

3 stops33h 15m

Sydney Kingsford Smith

Wed 19/2

11:20-07:57

2 stops37h 37m

$1,994

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Mon 17/3

13:16-07:45

2 stops26h 29m

Sydney Kingsford Smith

Tue 25/3

10:05-18:02

2 stops23h 57m

$2,349

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sun 23/3

06:00-06:30

2 stops56h 30m

Sydney Kingsford Smith

Fri 4/4

12:50-09:07

3 stops36h 17m

$5,925

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sun 16/2

18:59-06:35

2 stops42h 36m

Sydney Kingsford Smith

Sat 22/2

20:30-12:42

2 stops57h 12m

$11,696

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 25 results

Best time to book a flight from Chicago to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Chicago with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Chicago to Sydney

Get recent, data-driven insights about flights from Chicago to Sydney including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Chicago to Sydney?

To ensure you get the cheapest price possible for a flight from Chicago to Sydney, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Chicago to Sydney?

Currently, May is the cheapest month in which you can book a flight from Chicago to Sydney (average of $129). Flying from Chicago to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to SYD?

When flying from Chicago to Sydney, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 35% versus a flight at midday.

Rainfall in Sydney by month

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

Temperature in Sydney by month

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Sydney

See what other customers who have flown with Fiji Airways, Air Canada and Delta from Chicago to Sydney have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Air Tahiti Nui

8.8

Very Good

62 reviews

Check prices

Reviews

1 / 2

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air Tahiti Nui

8.8

Very Good

62 reviews

Air Tahiti Nui

8.8

Very Good

62 reviews

Check prices

Reviews

1 / 2

Korean Air

8.5

Very Good

1,039 reviews

Air Tahiti Nui

8.8

Very Good

62 reviews

Check prices

Reviews

1 / 2

ANA

8.4

Very Good

852 reviews

Air Tahiti Nui

8.8

Very Good

62 reviews

Check prices

Reviews

1 / 2

Fiji Airways

8.1

Very Good

188 reviews

Air Tahiti Nui

8.8

Very Good

62 reviews

Check prices

Reviews

1 / 2

Delta

8.0

Very Good

8,521 reviews

Air Tahiti Nui

8.8

Very Good

62 reviews

Check prices

Reviews

1 / 2

Related info for your journey

What airport do you fly into for flights to Sydney from Chicago?
For a flight from Chicago to Sydney, you will be flying into Kingsford Smith. Sydney Kingsford Smith (SYD) is just 7.5 km from the centre vof the city. Kingsford Smith is the only Sydney airport and it handles 0 inbound flights from Chicago per day. 3 airlines have flights to Sydney Kingsford Smith from Chicago on a regular basis.
What are the cheapest airlines flying from Chicago to Sydney round-trip?
Cheapflights users have booked flights from Chicago to Sydney round-trip from $1,357. Other airlines that can offer you cheap pricing are American Airlines, from $1,371, and British Airways, from $1,378. Qantas Airways is currently priced 32% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Chicago to Sydney one-way?
$662 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Qantas Airways and Fiji Airways, with prices starting from $696 and $907, respectively.
Can I find deals for flights from Chicago to Sydney that include hotel bookings?
Yes. In addition to deals on Chicago to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Chicago to Sydney?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Sydney.
Can I find deals for business class flights from Chicago to Sydney?
Yes. Cheapflights offers flight deals from Chicago to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Chicago to Sydney?
Currently, May is the cheapest month in which you can book a flight from Chicago to Sydney (average of $129). Flying from Chicago to Sydney in October is currently the most expensive (average of $171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Parramatta

Wollongong

Penrith

Katoomba

Randwick

Coogee

Manly

Cronulla

Bondi Beach

Terrigal

Lithgow

Leura

Swansea

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Alternative routes for Chicago to Sydney

O'Hare Intl to Sydney flights

Midway to Sydney flights

St. Louis to Sydney flights

Other flights to Sydney

Top 3 airlines flying from Chicago to Sydney

Airline	Cheapest	Average	Flexibility	On-time
Qantas Airways	Cheapest$1,458	Average$1,555	FlexibilityNo cancel fee	On-time74%	Search Qantas Airways flights
Air Canada	Cheapest$1,545	Average$1,889	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest$1,804	Average$2,308	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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How does Cheapflights help users find flights from Chicago to Sydney?

Deals for Chicago to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Chicago to Sydney?

Cheapflights helps you find that perfect flight to Sydney from Chicago by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Chicago to Sydney with no change fees?

Yes, we can. To see specific flights from Chicago to Sydney with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Chicago to Sydney become cheaper?

Yes, Cheapflights offers price alerts on Chicago to Sydney flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Chicago to Sydney from $662

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/1. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from Chicago to Sydney Kingsford Smith are usually found in March or February, booked 82 days in advance, depart on a Sunday or Monday and return on a Tuesday

Cheap flight deals from Chicago to Sydney

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Chicago to Sydney

Cheapest flights from Chicago to SydneyExplore the most affordable flight options available from Chicago to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2025.

Explore the most affordable flight options available from Chicago to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2025.

Find flights from Chicago to Sydney within your budget

Best time to book a flight from Chicago to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Chicago with our price prediction graph.

Travel insights for flights from Chicago to Sydney

Get recent, data-driven insights about flights from Chicago to Sydney including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Chicago to Sydney?

Use this chart to determine the optimal time to book a return flight from Chicago to Sydney. Price data was last updated on 17 January 2025.

What is the cheapest month to book a flight from Chicago to Sydney?

What is the cheapest time of day to fly from CHI to SYD?

Find hourly flight availability from Chicago to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 January 2025.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

Reviews of airlines servicing Sydney

See what other customers who have flown with Fiji Airways, Air Canada and Delta from Chicago to Sydney have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Sydney from Chicago?

What are the cheapest airlines flying from Chicago to Sydney round-trip?

What are the cheapest airlines to fly from Chicago to Sydney one-way?

Can I find deals for flights from Chicago to Sydney that include hotel bookings?

How can I find direct flights from Chicago to Sydney?

Can I find deals for business class flights from Chicago to Sydney?

What is the cheapest month to book a flight from Chicago to Sydney?

Travelling to a place near Chicago?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Chicago to Sydney

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Chicago to Sydney

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Chicago to Sydney?

Why should you use Cheapflights to find cheap flight tickets from Chicago to Sydney?

Can Cheapflights find flights from Chicago to Sydney with no change fees?

Can Cheapflights notify me if prices for flights from Chicago to Sydney become cheaper?

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Cheapest flights from Chicago to Sydney
Explore the most affordable flight options available from Chicago to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2025.