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

$666 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $671 and $829, respectively. Find deals

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

May is one of the best times of the year to fly to Sydney from Idaho. Prices for May average $2,311 per person but you can even find prices for as low as $1,547. The most expensive prices can be found in the month of December. Opting for a May flight can save you 75% on your journey compared to booking in December

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

Sydney Kingsford Smith (SYD), located 7.5 km from the city centre, is the airport you fly into when you book flights from Idaho to Sydney.

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

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

How can I find direct flights from Idaho to Sydney?

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

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

Yes. Cheapflights offers flight deals from Idaho 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.

$666+ Flights from Idaho to Sydney

Cheap flight deals from Idaho to Sydney

Round-trip from	$1,369
One-way from	$666
Popular in	December
Cheapest in	May
Average price	$2,024

United Airlines
2/6-14/6
2 total stops
46h 48m total
Idaho to Sydney

Search Deals

United Airlines
19/8
2 total stops
32h 12m total
Idaho to Sydney

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($904 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease ($250 potential savings vs. average return price).

Search Deals

Average for round-trip flights in February 2025

Search Deals

Find flight deals from Idaho to Sydney

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

Wed 3/914:11BOI - SYD

1 stop24h 49mUnited Airlines

Wed 17/910:20SYD - BOI

1 stop26h 48mUnited Airlines

Deal found 22/2$1,368

Thu 31/713:37GEG - SYD

2 stops24h 18mUnited Airlines

Sat 16/809:30SYD - GEG

2 stops28h 18mUnited Airlines

Deal found 21/2$1,376

Thu 21/813:38BOI - SYD

2 stops25h 27mAmerican Airlines

Mon 15/909:10SYD - BOI

2 stops23h 32mAmerican Airlines

Deal found 21/2$1,415

Thu 21/813:00BOI - SYD

1 stop25h 35mDelta

Mon 15/909:25SYD - BOI

1 stop18h 25mDelta

Deal found 21/2$1,514

Thu 31/713:30GEG - SYD

1 stop24h 05mDelta

Sat 16/809:25SYD - GEG

1 stop19h 46mDelta

Deal found 21/2$1,755

Tue 17/607:25GEG - SYD

2 stops34h 10mAir New Zealand

Fri 4/711:50SYD - GEG

2 stops28h 19mAir New Zealand

Deal found 21/2$1,796

Wed 3/920:30BOI - SYD

2 stops42h 35mMultiple Airlines

Wed 17/912:50SYD - BOI

3 stops50h 09mMultiple Airlines

Deal found 22/2$2,457

Wed 18/617:45GEG - SYD

2 stops44h 20mMultiple Airlines

Thu 3/708:55SYD - GEG

3 stops30h 38mMultiple Airlines

Deal found 21/2$2,610

Sat 5/419:30GEG - SYD

2 stops55h 15mAlaska Airlines

Sat 12/421:40SYD - GEG

2 stops43h 19mAlaska Airlines

Deal found 21/2$2,902

Sat 5/415:21GEG - SYD

2 stops22h 44mAmerican Airlines

Sat 12/410:25SYD - GEG

1 stop28h 13mAmerican Airlines

Deal found 21/2$3,767

Mon 10/307:00GEG - SYD

1 stop30h 25mQantas Airways

Wed 12/317:25SYD - GEG

1 stop24h 06mQantas Airways

Deal found 22/2$3,884

Sun 25/516:40BOI - SYD

2 stops24h 05mAir New Zealand

Mon 9/611:50SYD - BOI

2 stops23h 15mAir New Zealand

Deal found 21/2$4,135

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

Mon 2/614:31BOI - SYD

1 stop24h 24mUnited Airlines

Sat 14/609:30SYD - BOI

1 stop22h 24mUnited Airlines

Deal found 21/2$1,369

Thu 21/813:38BOI - SYD

2 stops25h 27mAmerican Airlines

Mon 15/909:10SYD - BOI

2 stops23h 32mAmerican Airlines

Deal found 21/2$1,415

Thu 21/813:00BOI - SYD

1 stop25h 35mDelta

Mon 15/909:25SYD - BOI

1 stop18h 25mDelta

Deal found 21/2$1,514

Tue 17/607:25GEG - SYD

2 stops34h 10mAir New Zealand

Fri 4/711:50SYD - GEG

2 stops28h 19mAir New Zealand

Deal found 21/2$1,796

Wed 18/617:45GEG - SYD

2 stops44h 20mMultiple Airlines

Thu 3/708:55SYD - GEG

3 stops30h 38mMultiple Airlines

Deal found 21/2$2,610

Thu 31/713:37GEG - SYD

2 stops24h 18mUnited Airlines

Sat 16/809:30SYD - GEG

2 stops28h 18mUnited Airlines

Deal found 21/2$1,376

Sat 5/419:30GEG - SYD

2 stops55h 15mAlaska Airlines

Sat 12/421:40SYD - GEG

2 stops43h 19mAlaska Airlines

Deal found 21/2$2,902

Thu 31/713:30GEG - SYD

1 stop24h 05mDelta

Sat 16/809:25SYD - GEG

1 stop19h 46mDelta

Deal found 21/2$1,755

Mon 10/307:00GEG - SYD

1 stop30h 25mQantas Airways

Wed 12/317:25SYD - GEG

1 stop24h 06mQantas Airways

Deal found 22/2$3,884

Thu 21/807:30BOI - SYD

3 stops43h 45mMultiple Airlines

Mon 15/918:05SYD - BOI

2 stops38h 15mMultiple Airlines

Deal found 21/2$2,877

Sat 5/415:21GEG - SYD

2 stops22h 44mAmerican Airlines

Sat 12/410:25SYD - GEG

1 stop28h 13mAmerican Airlines

Deal found 21/2$3,767

Sun 25/516:40BOI - SYD

2 stops24h 05mAir New Zealand

Mon 9/611:50SYD - BOI

2 stops23h 15mAir New Zealand

Deal found 21/2$4,135

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

Mon 10/315:15GEG - SYD

2 stops27h 25mMultiple Airlines

Wed 12/317:50SYD - GEG

3 stops47h 41mMultiple Airlines

Deal found 22/2$3,778

Mon 10/307:00GEG - SYD

1 stop30h 25mQantas Airways

Wed 12/317:25SYD - GEG

1 stop24h 06mQantas Airways

Deal found 22/2$3,884

Thu 13/307:15BOI - SYD

1 stop29h 50mDelta

Mon 24/313:15SYD - BOI

1 stop26h 35mDelta

Deal found 21/2$1,818

Thu 13/306:30BOI - SYD

3 stops39h 25mMultiple Airlines

Mon 24/310:20SYD - BOI

2 stops47h 00mMultiple Airlines

Deal found 21/2$3,082

Sun 23/315:15GEG - SYD

1 stop24h 00mUnited Airlines

Sun 30/311:20SYD - GEG

2 stops43h 18mUnited Airlines

Deal found 21/2$1,890

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

Tue 19/805:43GEG - SYD

2 stops32h 12mUnited Airlines

Deal found 20/2$666

Mon 18/815:47GEG - SYD

2 stops22h 18mAmerican Airlines

Deal found 20/2$671

Mon 18/813:30GEG - SYD

1 stop24h 05mDelta

Deal found 20/2$829

Tue 19/813:40GEG - SYD

3 stops26h 00mMultiple Airlines

Deal found 20/2$1,631

Find flights from Idaho to Sydney within your budget

Fly from

Fly to

Route

Depart

Return

Price

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Mon 2/6

14:31-06:55

1 stop24h 24m

Sydney Kingsford Smith

Sat 14/6

09:30-15:54

1 stop22h 24m

$1,369

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 31/7

13:37-06:55

2 stops24h 18m

Sydney Kingsford Smith

Sat 16/8

09:30-20:48

2 stops28h 18m

$1,376

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 21/8

13:38-07:05

2 stops25h 27m

Sydney Kingsford Smith

Mon 15/9

09:10-16:42

2 stops23h 32m

$1,415

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 21/8

13:00-06:35

1 stop25h 35m

Sydney Kingsford Smith

Mon 15/9

09:25-11:50

1 stop18h 25m

$1,514

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Thu 31/7

13:30-06:35

1 stop24h 05m

Sydney Kingsford Smith

Sat 16/8

09:25-12:11

1 stop19h 46m

$1,755

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Tue 17/6

07:25-10:35

2 stops34h 10m

Sydney Kingsford Smith

Fri 4/7

11:50-23:09

2 stops28h 19m

$1,796

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Wed 18/6

17:45-07:05

2 stops44h 20m

Sydney Kingsford Smith

Thu 3/7

08:55-22:33

3 stops30h 38m

$2,610

BoiseSydney

BOI - SYD

BOISYD

Boise Air Term. Gowen Fld

Thu 21/8

07:30-19:15

3 stops43h 45m

Sydney Kingsford Smith

Mon 15/9

18:05-16:20

2 stops38h 15m

$2,877

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 5/4

19:30-19:45

2 stops55h 15m

Sydney Kingsford Smith

Sat 12/4

21:40-23:59

2 stops43h 19m

$2,902

SpokaneSydney

GEG - SYD

GEGSYD

Spokane

Sat 5/4

15:21-07:05

2 stops22h 44m

Sydney Kingsford Smith

Sat 12/4

10:25-21:38

1 stop28h 13m

$3,767

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 19 results

Best time to book a flight from Idaho to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Idaho 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 Idaho to Sydney

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

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

Currently, May is the cheapest month in which you can book a flight from Idaho to Sydney (average of $129). Flying from Idaho 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 ID to SYD?

When flying from Idaho to Sydney, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 Alaska Airlines, Delta and Air New Zealand from Idaho to Sydney have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very Good

9,700 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Alaska Airlines

8.0

Very Good

9,700 reviews

Alaska Airlines

8.0

Very Good

9,700 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Delta

8.0

Very Good

8,203 reviews

Alaska Airlines

8.0

Very Good

9,700 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Air New Zealand

7.9

Good

460 reviews

Alaska Airlines

8.0

Very Good

9,700 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

LATAM Airlines

7.5

Good

1,789 reviews

Alaska Airlines

8.0

Very Good

9,700 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Qantas Airways

7.4

Good

813 reviews

Alaska Airlines

8.0

Very Good

9,700 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

What airport do you fly into for flights to Sydney from Idaho?
Sydney Kingsford Smith (SYD), located 7.5 km from the city centre, is the airport you fly into when you book flights from Idaho to Sydney.
What are the cheapest airlines to fly from Idaho to Sydney one-way?
$666 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $671 and $829, respectively.
Can I find deals for flights from Idaho to Sydney that include hotel bookings?
Yes. In addition to deals on Idaho to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Idaho to Sydney?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Sydney.
Can I find deals for business class flights from Idaho to Sydney?
Yes. Cheapflights offers flight deals from Idaho 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 Idaho to Sydney?
Currently, May is the cheapest month in which you can book a flight from Idaho to Sydney (average of $129). Flying from Idaho 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

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Browse thousands of different options on Cheapflights for your next trip

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Fly with Cheapflights

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

Cheapflights makes it easy to find Idaho to Sydney flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights helps you find that perfect flight to Sydney from Idaho 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 Idaho to Sydney with no change fees?

Certainly. Search results for flights to Sydney from Idaho shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Idaho today and book when prices fit your budget.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Idaho to Sydney from $666

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Idaho to Sydney

Keep the following information in mind while searching for Idaho to Sydney flight deals. Data was last updated 22 February 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Idaho to Sydney

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

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

Find flights from Idaho to Sydney within your budget

Best time to book a flight from Idaho to Sydney

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

Travel insights for flights from Idaho to Sydney

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

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

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

Find hourly flight availability from Idaho 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 February 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 Alaska Airlines, Delta and Air New Zealand from Idaho 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 Idaho 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 Idaho?

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

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

How can I find direct flights from Idaho to Sydney?

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

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

Travelling to a place near Idaho?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Idaho to Sydney

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

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 Idaho to Sydney?

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

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

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

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