$490+ Cheap flights from Seattle (SEA) to Sydney (SYD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Nov 24 — Dec 11
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Sydney
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Best
Last-minute
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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 October 25, 2026.
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 October 25, 2026.
This lol.travel deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:05 pm -
1 stop19h 30m
Sun 11/811:20 am -
1 stop22h 17m
Deal found 10/23![Air Canada logo]()
$976
This Orbitz deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:40 am -
1 stop29h 55m
Tue 11/311:20 am -
1 stop26h 02m
Deal found 10/20![Air Canada logo]()
$977
This Air Canada deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/253:15 pm -
1 stop23h 20m
Sun 11/86:20 am -
2 stops22h 12m
Deal found 10/24![Multiple Airlines logo]()
$987
This Air Canada deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:15 pm -
1 stop23h 20m
Mon 11/99:00 am -
2 stops24h 37m
Deal found 10/22![Air Canada logo]()
$994
This Air Canada deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:05 pm -
2 stops24h 35m
Mon 11/2311:20 am -
1 stop17h 12m
Deal found 10/19![Air Canada logo]()
$998
This Air Canada deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:05 pm -
2 stops23h 10m
Tue 11/1711:20 am -
1 stop22h 12m
Deal found 10/20![Multiple Airlines logo]()
$1,007
This Air Canada deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/237:05 pm -
1 stop40h 50m
Thu 1/144:00 pm -
1 stop17h 37m
Deal found 10/21![Air Canada logo]()
$1,010
This Orbitz deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:05 pm -
1 stop19h 30m
Fri 10/3010:20 am -
1 stop17h 07m
Deal found 10/21![Air Canada logo]()
$1,015
Best flights from Seattle to SydneyDiscover carefully curated flight deals from Seattle to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.
Discover carefully curated flight deals from Seattle to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.
This United Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:40 am -
1 stop27h 40m
Wed 11/2511:50 am -
1 stop19h 30m
Deal found 10/23![United Airlines logo]()
$1,125
This Qantas Airways deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:59 pm -
1 stop20h 01m
Sat 11/2811:10 am -
1 stop19h 31m
Deal found 10/23![Qantas Airways logo]()
$1,350
This United Airlines deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/284:39 pm -
1 stop21h 26m
Tue 12/221:20 pm -
1 stop26h 20m
Deal found 10/20![United Airlines logo]()
$1,211
This KLM deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:35 pm -
3 stops47h 00m
Sat 11/2110:15 pm -
2 stops56h 32m
Deal found 10/21![KLM logo]()
$2,689
This Air Tahiti Nui deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Tahiti Nui is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/48:08 pm -
3 stops50h 32m
Sun 1/317:05 am -
2 stops28h 42m
Deal found 10/20![Air Tahiti Nui logo]()
$2,804
This Air Tahiti Nui deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Tahiti Nui is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/308:04 pm -
3 stops53h 46m
Sun 12/208:55 am -
3 stops25h 54m
Deal found 10/19![Multiple Airlines logo]()
$3,144
This British Airways deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:45 pm -
2 stops41h 10m
Sun 11/294:20 pm -
3 stops71h 01m
Deal found 10/23![British Airways logo]()
$3,552
This KLM deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/142:20 pm -
3 stops46h 05m
Sun 6/201:05 pm -
2 stops44h 15m
Deal found 10/22![KLM logo]()
$2,704
This KLM deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:35 pm -
3 stops47h 00m
Mon 11/309:55 am -
2 stops44h 55m
Deal found 10/24![KLM logo]()
$2,992
This British Airways deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/296:19 am -
3 stops54h 46m
Thu 4/152:35 pm -
2 stops38h 00m
Deal found 10/23![British Airways logo]()
$3,565
This KLM deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/262:35 pm -
3 stops45h 50m
Sun 12/610:35 am -
3 stops44h 15m
Deal found 10/20![KLM logo]()
$3,423
This KLM deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/105:40 pm -
2 stops43h 45m
Sat 4/176:15 am -
3 stops46h 18m
Deal found 10/19![KLM logo]()
$3,463
Last-minute flights from Seattle to SydneyDiscover last-minute flight deals from Seattle to Sydney. Data last updated October 25, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Sydney. Data last updated October 25, 2026 and is based on user searches.
This lol.travel deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:05 pm -
1 stop19h 30m
Sun 11/811:20 am -
1 stop22h 17m
Deal found 10/23![Air Canada logo]()
$976
This Air Canada deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/253:15 pm -
1 stop23h 20m
Sun 11/86:20 am -
2 stops22h 12m
Deal found 10/24![Multiple Airlines logo]()
$987
This Orbitz deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:05 pm -
1 stop19h 30m
Fri 10/3010:20 am -
1 stop17h 07m
Deal found 10/21![Air Canada logo]()
$1,015
This Orbitz deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:40 am -
1 stop29h 55m
Tue 11/311:20 am -
1 stop26h 02m
Deal found 10/20![Air Canada logo]()
$977
This Air Canada deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:15 pm -
1 stop23h 20m
Mon 11/99:00 am -
2 stops24h 37m
Deal found 10/22![Air Canada logo]()
$994
This Air Canada deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:10 am -
1 stop28h 25m
Thu 11/1911:20 am -
1 stop17h 12m
Deal found 10/21![Air Canada logo]()
$1,016
This Air Canada deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:05 pm -
2 stops24h 35m
Mon 11/2311:20 am -
1 stop17h 12m
Deal found 10/19![Air Canada logo]()
$998
This Air Canada deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:05 pm -
2 stops23h 10m
Tue 11/1711:20 am -
1 stop22h 12m
Deal found 10/20![Multiple Airlines logo]()
$1,007
One-way flights from Seattle to SydneySearch for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
Search for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
This Expedia deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/196:00 am -
1 stop29h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Alaska Airlines logo]()
$490
This Expedia deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:00 am -
1 stop27h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Alaska Airlines logo]()
$505
This Alaska Airlines deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:23 am -
2 stops28h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Alaska Airlines logo]()
$510
This Alaska Airlines deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/183:59 pm -
1 stop19h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Alaska Airlines logo]()
$529
This Alaska Airlines deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3012:00 pm -
1 stop24h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Alaska Airlines logo]()
$550
This FlightHub deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/169:30 pm -
1 stop41h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Philippine Airlines logo]()
$554
This Mytrip deal was found by Cheapflights users on 10/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/39:00 pm -
1 stop38h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Alaska Airlines logo]()
$566
This KAYAK deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/229:30 pm -
1 stop41h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Philippine Airlines logo]()
$573
This Bravofly deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/75:42 pm -
1 stop20h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Qantas Airways logo]()
$604
This oojo deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/181:50 pm -
1 stop21h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Multiple Airlines logo]()
$605
Find 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 October 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $977 (Air Canada) |
One-way from | $490 (Expedia) |
Popular in | December |
Cheapest in | August |
Average price | $1,076 |
Cheapflights Fare Finder
Customize 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 7,457,451 searches. Data last updated October 25, 2026.
Use the filters below to find and compare flights from Seattle to Sydney that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Wed 11/18
10:17 am-6:25 am
2 stops25h 08m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$529
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Wed 11/18
11:30 am-8:30 am
2 stops26h 00m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$618
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Fri 11/27
7:55 pm-8:30 am
2 stops65h 35m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$643
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Thu 12/31
10:12 am-6:25 am
2 stops25h 13m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$666
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Thu 1/14
10:05 am-3:30 pm
2 stops34h 25m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$810
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Mon 12/28
7:05 pm-7:25 pm
2 stops53h 20m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$873
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Sun 1/10
10:00 am-6:25 am
1 stop25h 25m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$922
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Thu 1/14
6:33 pm-6:35 am
1 stop41h 02m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$981
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Sat 1/9
12:00 pm-8:30 am
1 stop25h 30m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$1,083
Quickest round-trip
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Wed 1/6
2:30 pm-8:30 am
1 stop23h 00m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$1,083
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Seattle to Sydney
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Sydney in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Seattle-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Sydney flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
SEA-SYD
Estimated round-trip 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.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Sydney
Prices
More
How far ahead should I book a flight from Seattle to Sydney?
To ensure you get the cheapest price possible for a flight from Seattle to Sydney, you should look to book at least 23 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 Seattle to Sydney?
Currently, August is the cheapest month in which you can book a flight from Seattle to Sydney (average of $1,039). Flying from Seattle to Sydney in December is currently the most expensive (average of $1,933). 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.
How much does it cost to fly round-trip from Seattle to Sydney?
Airfare is below average for this route at the moment.
Seattle to Sydney flights typically cost between $996 and $1,272 in March.The cheapest round-trip price found within the last 5 days was $977 on Air Canada (Mar 1-Mar 17).
What’s the top layover airport for flights from Seattle to Sydney?
Share of 1-stop round-trip flights from Seattle to Sydney chosen by Cheapflights users in the past 12 months, using the same layover each way.
Los Angeles (LAX) – chosen by Cheapflights users on 43% of 1-stop itineraries from Seattle to Sydney on Cheapflights.
What’s the cheapest layover airport for flights from Seattle to Sydney?
Average round-trip fare for 1-stop flights from Seattle to Sydney, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Los Angeles (LAX) is the most affordable 1-stop option, with an average round-trip price of $898.
What’s the fastest layover option from Seattle to Sydney?
Shortest average travel time for 1-stop one-way flights from Seattle to Sydney, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for 1-stop routes: 18h 50m.
Which airport typically offers the quickest layover for flights from Seattle to Sydney?
Average layover duration for 1-stop one-way flights from Seattle to Sydney, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) offer the fastest connection on this route, with an average layover time of 1h 55m.
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 October 25, 2026.
Read reviews from past customers who have flown ANA,Delta, andQantas Airways from Seattle to Sydney. 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.
Entertainment
8.0
Food
7.8
Crew
8.7
Overall
8.3
Comfort
8.2
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Entertainment
8.0
Food
7.8
Crew
8.7
Overall
8.3
Comfort
8.2
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Entertainment
8.0
Food
7.8
Crew
8.7
Overall
8.3
Comfort
8.2
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Entertainment
8.0
Food
7.8
Crew
8.7
Overall
8.3
Comfort
8.2
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Entertainment
8.0
Food
7.8
Crew
8.7
Overall
8.3
Comfort
8.2
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Entertainment
8.0
Food
7.8
Crew
8.7
Overall
8.3
Comfort
8.2
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
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.
Traveling to a place near Sydney?
Book flights to Sydney if you plan to visit one of these locationsParramatta
Wollongong
Coogee
Manly
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Seattle and Sydney flights
Browse other Seattle and Sydney flight options. Last updated on October 25, 2026.
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Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on October 25, 2026.
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Top 8 airlines flying from Seattle to Sydney
Discover the top 8 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 7,457,451 searches. Data last updated October 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$583 | Average$1,012 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$819 | Average$1,183 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$835 | Average$1,419 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$888 | Average$1,249 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$938 | Average$1,108 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$947 | Average$1,276 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$975 | Average$1,097 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,159 | Average$1,479 | FlexibilityNo cancel fee | On-time75% |