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Cheap flights from Seattle to Sydney from $577

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 30/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
25 Nov — 2 Dec1
1 adult

The best prices from Seattle/Tacoma Intl to Sydney Kingsford Smith are usually found in February or March, booked 61 days in advance, depart on a Tuesday or Thursday and return on a Thursday

Cheap flight deals from Seattle to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 November 2024.

Round-trip from

$1,392

One-way from

$577

Popular in

December

Cheapest in

February
3/2-17/2
  • 3/2-17/2
  • 3 total stops
  • 77h 45m total
  • Seattle to Sydney
Search Deals
30/3
  • 30/3
  • 2 total stops
  • 35h 35m total
  • Seattle to Sydney
Search Deals
High demand for flights, 13% potential price rise
Search Deals
Best time to find cheap flights, 10% potential price drop
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 20 November 2024.

Fri 29/1119:41SEA - SYD
1 stop29h 04mAlaska Airlines
Tue 10/1221:40SYD - SEA
1 stop28h 51mAlaska Airlines
Deal found 20/11$1,405
Wed 4/1209:25SEA - SYD
2 stops39h 20mMultiple Airlines
Mon 9/1214:00SYD - SEA
2 stops29h 10mMultiple Airlines
Deal found 20/11$1,471
Tue 26/1114:13SEA - SYD
1 stop23h 22mDelta
Wed 11/1211:05SYD - SEA
1 stop20h 35mDelta
Deal found 20/11$1,623
Thu 5/1215:05SEA - SYD
1 stop20h 50mAir Canada
Tue 17/1213:55SYD - SEA
2 stops38h 55mAir Canada
Deal found 19/11$1,974
Thu 21/1119:46SEA - SYD
1 stop28h 59mHawaiian Airlines
Thu 28/1121:40SYD - SEA
2 stops20h 10mHawaiian Airlines
Deal found 20/11$2,031
Wed 27/1115:40SEA - SYD
1 stop23h 50mANA
Mon 2/1221:45SYD - SEA
1 stop34h 35mANA
Deal found 20/11$2,112
Mon 30/1223:51SEA - SYD
2 stops38h 14mUnited Airlines
Fri 17/111:20SYD - SEA
1 stop21h 40mUnited Airlines
Deal found 18/11$2,168
Wed 4/1217:10SEA - SYD
1 stop20h 55mAir New Zealand
Wed 18/1209:55SYD - SEA
2 stops27h 30mAir New Zealand
Deal found 19/11$2,286
Mon 25/1111:20SEA - SYD
2 stops38h 30mCathay Pacific
Sun 1/1215:15SYD - SEA
2 stops34h 54mCathay Pacific
Deal found 20/11$2,533
Sat 30/1119:00SEA - SYD
2 stops52h 30mTurkish Airlines
Tue 10/1220:40SYD - SEA
2 stops39h 25mTurkish Airlines
Deal found 19/11$2,602

Find flights from Seattle to Sydney within your budget

Customise your flight search to find flights from Seattle to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 726,782 searches. Data last updated 20 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Mon 3/2

17:55-19:45

2 stops54h 50m

Sydney Kingsford Smith

Mon 17/2

17:25-21:20

1 stop22h 55m

$1,392

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 5/3

14:23-19:45

1 stop34h 22m

Sydney Kingsford Smith

Tue 18/3

21:40-21:25

1 stop17h 45m

$1,394

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 26/2

07:00-19:45

1 stop17h 45m

Sydney Kingsford Smith

Fri 7/3

21:40-22:55

2 stops20h 15m

$1,408

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 2/4

19:05-08:20

1 stop19h 15m

Sydney Kingsford Smith

Thu 17/4

09:20-09:50

1 stop17h 30m

$1,440

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Tue 11/3

16:45-10:30

1 stop23h 45m

Sydney Kingsford Smith

Tue 18/3

21:45-14:20

1 stop34h 35m

$1,481

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Thu 27/2

19:04-09:00

1 stop18h 56m

Sydney Kingsford Smith

Mon 10/3

11:15-12:02

1 stop18h 47m

$1,498

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 5/2

15:25-06:20

1 stop19h 55m

Sydney Kingsford Smith

Tue 4/3

11:20-13:57

1 stop21h 37m

$1,514

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Wed 5/2

21:37-06:50

2 stops38h 13m

Sydney Kingsford Smith

Thu 20/2

14:15-16:40

2 stops21h 25m

$1,549

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Fri 14/2

22:35-09:30

1 stop39h 55m

Sydney Kingsford Smith

Sun 2/3

11:10-18:10

1 stop26h 00m

$1,882

SeattleSydney

SEA - SYD

SEASYD

Seattle/Tacoma Intl

Sun 30/3

10:05-15:40

2 stops35h 35m

$577

Flights are sorted by cheapest return flights first.

Deals found on 18/11

Showing 1-10 of 22 results
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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?

Use this chart to determine the optimal time to book a return flight from Seattle to Sydney. Price data was last updated on 15 November 2024.

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?

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 20 November 2024.

A simple way to save on the total cost of your ticket is to fly from Seattle to Sydney in the afternoon. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight at midday.

Rainfall in Sydney by month

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

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

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 20 November 2024.
To help decide which airline to fly from Seattle to Sydney, see what other customers have to say about Alaska Airlines, Delta and Air Canada. 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
68 reviews
Check prices

Crew

9.0

Comfort

8.0

Boarding

8.5

Food

7.7

Overall

8.7

Entertainment

7.2

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
8.7
Very Good
68 reviews
Air Tahiti Nui
8.7
Very Good
68 reviews
Check prices

Crew

9.0

Comfort

8.0

Boarding

8.5

Food

7.7

Overall

8.7

Entertainment

7.2

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.

ANA
8.4
Very Good
833 reviews
Air Tahiti Nui
8.7
Very Good
68 reviews
Check prices

Crew

9.0

Comfort

8.0

Boarding

8.5

Food

7.7

Overall

8.7

Entertainment

7.2

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.

Asiana Airlines
8.3
Very Good
476 reviews
Air Tahiti Nui
8.7
Very Good
68 reviews
Check prices

Crew

9.0

Comfort

8.0

Boarding

8.5

Food

7.7

Overall

8.7

Entertainment

7.2

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.

China Airlines
8.3
Very Good
778 reviews
Air Tahiti Nui
8.7
Very Good
68 reviews
Check prices

Crew

9.0

Comfort

8.0

Boarding

8.5

Food

7.7

Overall

8.7

Entertainment

7.2

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.

Fiji Airways
8.1
Very Good
201 reviews
Air Tahiti Nui
8.7
Very Good
68 reviews
Check prices

Crew

9.0

Comfort

8.0

Boarding

8.5

Food

7.7

Overall

8.7

Entertainment

7.2

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.

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?

    Flying on Alaska Airlines is currently your cheapest option to Sydney, with prices starting at $1,394. Additional round-trip tickets that might be worth considering are offered by Hawaiian Airlines and Air Canada, with the lowest prices starting at $1,408 and $1,440, respectively. Users have found that Alaska Airlines is 17% 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 Hawaiian Airlines ($591), Alaska Airlines ($611), and Air Canada ($814).

  • 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Sydney flights
Seattle to Coolangatta flights
Spokane to Sydney flights
Portland to Coolangatta flights

Top 2 airlines flying from Seattle to Sydney

Discover the top 2 airlines that operate flights from Seattle to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 726,782 searches. Data last updated 20 November 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,158Average$1,568FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$1,228Average$1,540FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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?

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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