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

Flying on Air Canada is currently your cheapest option to Sydney, with prices starting at $1,408. Additional round-trip tickets that might be worth considering are offered by United Airlines and Alaska Airlines, with the lowest prices starting at $1,555 and $1,616, respectively. Users have found that Air Canada is 21% cheaper than the other options available to this destination. Find deals

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

The cheapet airlines for a one-way flight from Seattle to Sydney are Air Canada ($828), American Airlines ($843), and Delta ($862). Find deals

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

Travellers seeking maximum savings on their Seattle to Sydney flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday evenings 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 Seattle to Sydney?

When booking a flight from Seattle to Sydney, you may want to consider flying on Air Canada, Hawaiian Airlines or United Airlines as they are the most popular for this route.

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

Users have found that flying from Seattle to Sydney on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

To save up to 20% on this flight, we recommend booking at least 32 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle to Sydney from $1,380 1-2 weeks out and tickets from $1,855 for flights departing within the next 72 hours.

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

Flights from Seattle to Sydney lean towards being more expensive in December. Prices are generally better when you fly from Seattle to Sydney in March, with the cheapest ticket starting at $1,248.

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

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

How can I find direct flights from Seattle to Sydney?

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

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

Yes. Cheapflights offers flight deals from Seattle 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.

$679+ Flights from Seattle to Sydney

The best prices from Seattle/Tacoma Intl to Sydney Kingsford Smith are usually found in March or February, booked 31 days in advance, depart on a Monday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to Sydney

Round-trip from	$1,402
One-way from	$679
Popular in	December
Cheapest in	March
Average price	$1,643

Air Canada
13/6-22/6
3 total stops
39h 36m total
Seattle to Sydney

Search Deals

6/4
1 total stop
26h 50m total
Seattle to Sydney

Search Deals

Highest demand for flights based on searches. 9% potential increase in price ($299 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($79 potential savings vs. average return price).

Search Deals

Average for round-trip flights in February 2025

Search Deals

Find flight deals from Seattle to Sydney

Cheapest flights from Seattle to Sydney
Explore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 febbraio 2025.

ven 13/619:15SEA - SYD

2 stops22h 35mMultiple Airlines

dom 22/609:20SYD - SEA

1 stop17h 01mMultiple Airlines

Deal found 19/2$1,402

sab 5/705:45SEA - SYD

1 stop32h 35mAir Canada

ven 11/709:20SYD - SEA

1 stop21h 56mAir Canada

Deal found 20/2$1,408

gio 10/417:10SEA - SYD

1 stop20h 50mUnited Airlines

sab 26/409:30SYD - SEA

1 stop21h 29mUnited Airlines

Deal found 20/2$1,555

gio 20/313:55SEA - SYD

1 stop25h 05mAlaska Airlines

mar 1/410:10SYD - SEA

1 stop22h 43mAlaska Airlines

Deal found 19/2$1,616

sab 22/314:00SEA - SYD

1 stop22h 05mDelta

sab 29/313:15SYD - SEA

1 stop19h 24mDelta

Deal found 21/2$1,690

ven 7/322:35SEA - SYD

1 stop39h 55mPhilippine Airlines

dom 16/311:10SYD - SEA

1 stop26h 00mPhilippine Airlines

Deal found 20/2$1,703

sab 26/415:05SEA - SYD

2 stops24h 40mAir New Zealand

dom 4/511:50SYD - SEA

2 stops23h 40mAir New Zealand

Deal found 21/2$1,753

Best flights from Seattle to Sydney
Discover carefully curated flight deals from Seattle to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 febbraio 2025.

ven 13/619:15SEA - SYD

2 stops22h 35mMultiple Airlines

dom 22/609:20SYD - SEA

1 stop17h 01mMultiple Airlines

Deal found 19/2$1,402

sab 5/705:45SEA - SYD

1 stop32h 35mAir Canada

ven 11/709:20SYD - SEA

1 stop21h 56mAir Canada

Deal found 20/2$1,408

gio 10/417:10SEA - SYD

1 stop20h 50mUnited Airlines

sab 26/409:30SYD - SEA

1 stop21h 29mUnited Airlines

Deal found 20/2$1,555

gio 20/313:55SEA - SYD

1 stop25h 05mAlaska Airlines

mar 1/410:10SYD - SEA

1 stop22h 43mAlaska Airlines

Deal found 19/2$1,616

sab 22/314:00SEA - SYD

1 stop22h 05mDelta

sab 29/313:15SYD - SEA

1 stop19h 24mDelta

Deal found 21/2$1,690

ven 7/322:35SEA - SYD

1 stop39h 55mPhilippine Airlines

dom 16/311:10SYD - SEA

1 stop26h 00mPhilippine Airlines

Deal found 20/2$1,703

sab 26/415:05SEA - SYD

2 stops24h 40mAir New Zealand

dom 4/511:50SYD - SEA

2 stops23h 40mAir New Zealand

Deal found 21/2$1,753

Last-minute flights from Seattle to Sydney
Discover last-minute flight deals from Seattle to Sydney. Data last updated 21 febbraio 2025 and is based on user searches.

mer 26/222:35SEA - SYD

1 stop39h 55mPhilippine Airlines

dom 9/311:10SYD - SEA

1 stop26h 00mPhilippine Airlines

Deal found 19/2$8,485

gio 27/214:23SEA - SYD

3 stops27h 37mFiji Airways

lun 10/306:00SYD - SEA

2 stops30h 56mFiji Airways

Deal found 20/2$17,505

sab 1/313:33SEA - SYD

3 stops46h 22mBritish Airways

dom 9/316:20SYD - SEA

3 stops46h 50mBritish Airways

Deal found 20/2$6,176

sab 1/310:35SEA - SYD

2 stops28h 55mANA

mer 12/312:25SYD - SEA

2 stops24h 00mANA

Deal found 20/2$9,267

sab 1/307:15SEA - SYD

1 stop28h 45mUnited Airlines

mer 12/312:10SYD - SEA

1 stop21h 44mUnited Airlines

Deal found 20/2$9,749

dom 2/300:10SEA - SYD

1 stop41h 00mChina Airlines

lun 10/322:10SYD - SEA

1 stop39h 05mChina Airlines

Deal found 20/2$2,585

lun 3/319:05SEA - SYD

2 stops28h 00mMultiple Airlines

lun 10/318:25SYD - SEA

3 stops42h 37mMultiple Airlines

Deal found 20/2$1,975

mer 5/315:05SEA - SYD

2 stops35h 40mAir Canada

ven 21/307:30SYD - SEA

2 stops20h 20mAir Canada

Deal found 20/2$1,422

ven 7/322:35SEA - SYD

1 stop39h 55mPhilippine Airlines

dom 16/311:10SYD - SEA

1 stop26h 00mPhilippine Airlines

Deal found 20/2$1,703

ven 7/316:59SEA - SYD

3 stops29h 41mAir Tahiti Nui

dom 16/308:55SYD - SEA

2 stops28h 20mAir Tahiti Nui

Deal found 20/2$2,995

dom 9/301:10SEA - SYD

1 stop41h 00mChina Airlines

dom 16/322:10SYD - SEA

1 stop39h 05mChina Airlines

Deal found 20/2$2,576

lun 10/319:05SEA - SYD

2 stops23h 35mMultiple Airlines

dom 16/306:20SYD - SEA

2 stops26h 10mMultiple Airlines

Deal found 20/2$1,419

One-way flights from Seattle to Sydney
Search for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated 21 febbraio 2025.

dom 6/418:50SEA - SYD

1 stop26h 50mMultiple Airlines

Deal found 20/2$679

dom 9/315:05SEA - SYD

1 stop23h 30mAir Canada

Deal found 20/2$828

ven 28/215:00SEA - SYD

2 stops23h 00mAmerican Airlines

Deal found 21/2$843

mer 26/213:30SEA - SYD

2 stops24h 05mDelta

Deal found 21/2$862

mar 4/315:04SEA - SYD

3 stops44h 56mUnited Airlines

Deal found 20/2$870

ven 21/323:35SEA - SYD

1 stop39h 55mPhilippine Airlines

Deal found 21/2$983

ven 28/210:08SEA - SYD

1 stop27h 52mAlaska Airlines

Deal found 21/2$1,000

dom 16/301:10SEA - SYD

1 stop41h 00mChina Airlines

Deal found 21/2$1,535

gio 27/216:20SEA - SYD

3 stops25h 40mFiji Airways

Deal found 21/2$1,646

ven 28/210:08SEA - SYD

3 stops39h 32mAir Tahiti Nui

Deal found 21/2$1,801

sab 1/310:52SEA - SYD

3 stops61h 13mTurkish Airlines

Deal found 21/2$1,816

Find flights from Seattle to Sydney within your budget

Fly from

Fly to

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

ven 13/6

19:15-10:50

2 stops22h 35m

Sydney Kingsford Smith

dom 22/6

09:20-09:21

1 stop17h 01m

$1,402

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

sab 5/7

05:45-07:20

1 stop32h 35m

Sydney Kingsford Smith

ven 11/7

09:20-14:16

1 stop21h 56m

$1,408

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

gio 10/4

17:10-07:00

1 stop20h 50m

Sydney Kingsford Smith

sab 26/4

09:30-13:59

1 stop21h 29m

$1,555

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

gio 20/3

13:55-09:00

1 stop25h 05m

Sydney Kingsford Smith

mar 1/4

10:10-14:53

1 stop22h 43m

$1,616

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

sab 22/3

14:00-06:05

1 stop22h 05m

Sydney Kingsford Smith

sab 29/3

13:15-14:39

1 stop19h 24m

$1,690

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

ven 7/3

22:35-09:30

1 stop39h 55m

Sydney Kingsford Smith

dom 16/3

11:10-19:10

1 stop26h 00m

$1,703

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

sab 26/4

15:05-08:45

2 stops24h 40m

Sydney Kingsford Smith

dom 4/5

11:50-18:30

2 stops23h 40m

$1,753

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

dom 6/4

18:50-14:40

1 stop26h 50m

$679

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

dom 9/3

15:05-08:35

1 stop23h 30m

$828

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

ven 28/2

15:00-09:00

2 stops23h 00m

$843

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 18 results

Best time to book a flight from Seattle to Sydney

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

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

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

The price you pay for your flight from Seattle to Sydney may vary depending on when you book. For the best chance of a lower fare, look to book 31 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

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

A simple way to save on the total cost of your ticket is to fly from Seattle to Sydney at midday. If you’re flexible enough to do this you can expect to save up to 19% on your trip compared to booking a flight in the morning.

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

To help decide which airline to fly from Seattle to Sydney, see what other customers have to say about Air Tahiti Nui, China Airlines and Alaska Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air Tahiti Nui

8.7

Very Good

61 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

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

8.7

Very Good

61 reviews

Air Tahiti Nui

8.7

Very Good

61 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

China Airlines

8.2

Very Good

727 reviews

Air Tahiti Nui

8.7

Very Good

61 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Alaska Airlines

8.0

Very Good

9,697 reviews

Air Tahiti Nui

8.7

Very Good

61 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Fiji Airways

8.0

Very Good

184 reviews

Air Tahiti Nui

8.7

Very Good

61 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Delta

8.0

Very Good

8,213 reviews

Air Tahiti Nui

8.7

Very Good

61 reviews

Check prices

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Related info for your journey

What are the cheapest airlines flying from Seattle to Sydney round-trip?
Flying on Air Canada is currently your cheapest option to Sydney, with prices starting at $1,408. Additional round-trip tickets that might be worth considering are offered by United Airlines and Alaska Airlines, with the lowest prices starting at $1,555 and $1,616, respectively. Users have found that Air Canada is 21% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Seattle to Sydney one-way?
The cheapet airlines for a one-way flight from Seattle to Sydney are Air Canada ($828), American Airlines ($843), and Delta ($862).
Can I find deals for flights from Seattle to Sydney that include hotel bookings?
Yes. In addition to deals on Seattle to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Seattle to Sydney?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Sydney.
Can I find deals for business class flights from Seattle to Sydney?
Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Sydney?
Currently, May is the cheapest month in which you can book a flight from Seattle to Sydney (average of $129). Flying from Seattle 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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Top 3 airlines flying from Seattle to Sydney

Airline	Cheapest	Average	Flexibility	On-time
Hawaiian Airlines	Cheapest$856	Average$1,786	FlexibilityNo cancel fee	On-time85%	Search Hawaiian Airlines flights
United Airlines	Cheapest$1,182	Average$1,766	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest$1,254	Average$1,573	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

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

Deals for Seattle 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 Seattle to Sydney?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Sydney for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Need flexible booking options for your flight to Sydney from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, Cheapflights offers price alerts on Seattle 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 Seattle to Sydney from $679

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from Seattle/Tacoma Intl to Sydney Kingsford Smith are usually found in March or February, booked 31 days in advance, depart on a Monday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to Sydney

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Seattle to Sydney

Cheapest flights from Seattle to SydneyExplore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 febbraio 2025.

Explore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 febbraio 2025.

Find flights from Seattle to Sydney within your budget

Best time to book a flight from Seattle to Sydney

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

Travel insights for flights from Seattle to Sydney

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

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

Use this chart to determine the optimal time to book a return flight from Seattle to Sydney. Price data was last updated on 14 February 2025.

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

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

Find hourly flight availability from Seattle 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 21 febbraio 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

Related info for your journey

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

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

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

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

How can I find direct flights from Seattle to Sydney?

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

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

Travelling to a place near Seattle?

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 Seattle to Sydney

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

Top 3 airlines flying from Seattle 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 Seattle to Sydney?

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

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

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

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Cheapest flights from Seattle to Sydney
Explore the most affordable flight options available from Seattle to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 febbraio 2025.