$487+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SYD
Oct 7 — Oct 141
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Sydney with Cheapflights
1. Tell us where you want to go
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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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 September 7, 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 September 7, 2026.
This lol.travel deal was found by Cheapflights users on 9/6. 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.
Tue 10/203:00 pm -
1 stop23h 20m
Tue 10/2710:20 am -
1 stop22h 17m
Deal found 9/6![Air Canada logo]()
$849
This lol.travel deal was found by Cheapflights users on 9/3. 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 9/67:20 pm -
1 stop19h 00m
Sun 9/209:20 am -
1 stop26h 12m
Deal found 9/3![Air Canada logo]()
$874
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:00 pm -
1 stop40h 25m
Wed 11/112:00 pm -
2 stops23h 54m
Deal found 9/3![Multiple Airlines logo]()
$876
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:00 pm -
1 stop40h 25m
Fri 11/132:55 pm -
2 stops22h 59m
Deal found 9/3![Multiple Airlines logo]()
$877
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:00 pm -
1 stop40h 25m
Mon 11/92:00 pm -
2 stops23h 54m
Deal found 9/3![Multiple Airlines logo]()
$878
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:09 pm -
1 stop40h 16m
Fri 11/132:55 pm -
2 stops22h 59m
Deal found 9/3![Multiple Airlines logo]()
$879
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/298:09 pm -
1 stop40h 16m
Mon 11/92:00 pm -
2 stops23h 54m
Deal found 9/3![Multiple Airlines logo]()
$880
This lol.travel deal was found by Cheapflights users on 9/3. 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 9/67:20 pm -
2 stops23h 20m
Sun 9/209:20 am -
1 stop26h 12m
Deal found 9/3![Multiple Airlines logo]()
$889
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:00 pm -
1 stop41h 30m
Tue 10/272:00 pm -
2 stops22h 54m
Deal found 9/6![Multiple Airlines logo]()
$899
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 September 7, 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 September 7, 2026.
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:15 am -
2 stops30h 15m
Mon 11/910:40 am -
2 stops23h 15m
Deal found 9/4![Delta logo]()
$1,115
This United Airlines deal was found by Cheapflights users on 9/5. 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 10/71:19 pm -
1 stop24h 36m
Tue 10/2011:20 am -
2 stops27h 55m
Deal found 9/5![United Airlines logo]()
$1,277
This Alaska Airlines deal was found by Cheapflights users on 9/7. 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.
Mon 9/217:20 am -
1 stop18h 30m
Sat 10/38:45 pm -
2 stops28h 35m
Deal found 9/7![Multiple Airlines logo]()
$1,292
This Delta deal was found by Cheapflights users on 9/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/289:42 am -
2 stops27h 48m
Thu 11/1910:40 am -
2 stops25h 18m
Deal found 9/3![Delta logo]()
$1,115
This Air Tahiti Nui deal was found by Cheapflights users on 9/3. 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.
Tue 12/15:55 pm -
3 stops31h 55m
Sat 12/55:50 pm -
3 stops39h 52m
Deal found 9/3![Air Tahiti Nui logo]()
$2,246
This Delta deal was found by Cheapflights users on 9/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/110:25 am -
1 stop27h 05m
Thu 12/1710:40 am -
1 stop18h 25m
Deal found 9/2![Delta logo]()
$1,126
This KLM deal was found by Cheapflights users on 9/5. 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 stops45h 50m
Mon 11/306:35 am -
3 stops48h 15m
Deal found 9/5![KLM logo]()
$2,686
This Delta deal was found by Cheapflights users on 9/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2411:20 am -
2 stops26h 10m
Thu 12/310:40 am -
2 stops25h 19m
Deal found 9/5![Delta logo]()
$1,147
This Alaska Airlines deal was found by Cheapflights users on 9/3. 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 9/177:20 am -
1 stop18h 30m
Thu 12/109:40 pm -
1 stop18h 45m
Deal found 9/3![Multiple Airlines logo]()
$1,482
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Sun 11/112:45 pm -
2 stops25h 20m
Wed 11/411:50 am -
2 stops25h 07m
Deal found 9/3![United Airlines logo]()
$1,939
Last-minute flights from Seattle to SydneyDiscover last-minute flight deals from Seattle to Sydney. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Sydney. Data last updated September 7, 2026 and is based on user searches.
This lol.travel deal was found by Cheapflights users on 9/3. 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 9/67:20 pm -
1 stop19h 00m
Sun 9/209:20 am -
1 stop26h 12m
Deal found 9/3![Air Canada logo]()
$874
This lol.travel deal was found by Cheapflights users on 9/3. 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 9/67:20 pm -
2 stops23h 20m
Sun 9/209:20 am -
1 stop26h 12m
Deal found 9/3![Multiple Airlines logo]()
$889
This lol.travel deal was found by Cheapflights users on 9/6. 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.
Tue 10/203:00 pm -
1 stop23h 20m
Tue 10/2710:20 am -
1 stop22h 17m
Deal found 9/6![Air Canada logo]()
$849
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:00 pm -
1 stop41h 30m
Tue 10/272:00 pm -
2 stops22h 54m
Deal found 9/6![Multiple Airlines logo]()
$899
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:00 pm -
1 stop40h 25m
Wed 11/112:00 pm -
2 stops23h 54m
Deal found 9/3![Multiple Airlines logo]()
$876
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:00 pm -
1 stop40h 25m
Fri 11/132:55 pm -
2 stops22h 59m
Deal found 9/3![Multiple Airlines logo]()
$877
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:00 pm -
1 stop40h 25m
Mon 11/92:00 pm -
2 stops23h 54m
Deal found 9/3![Multiple Airlines logo]()
$878
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:09 pm -
1 stop40h 16m
Fri 11/132:55 pm -
2 stops22h 59m
Deal found 9/3![Multiple Airlines logo]()
$879
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/298:09 pm -
1 stop40h 16m
Mon 11/92:00 pm -
2 stops23h 54m
Deal found 9/3![Multiple Airlines logo]()
$880
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 September 7, 2026.
Search for one-way flight options from Seattle to Sydney. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/178:09 pm -
1 stop39h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$487
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/188:09 pm -
1 stop39h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$489
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:00 pm -
1 stop40h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$496
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:00 pm -
1 stop41h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$506
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/261:52 pm -
1 stop21h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$508
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/308:09 pm -
1 stop40h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$510
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:09 pm -
1 stop40h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$511
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/298:09 pm -
1 stop40h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$524
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:09 pm -
1 stop39h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$527
This oojo deal was found by Cheapflights users on 9/4. 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.
Mon 11/164:30 pm -
1 stop21h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Qantas Airways logo]()
$535
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/128:09 pm -
1 stop39h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$537
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 September 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $849 (lol.travel) |
One-way from | $487 (Kiwi.com) |
Popular in | December |
Cheapest in | August |
Average price | $1,032 |
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 September 7, 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
Quickest round-trip
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Wed 10/21
5:04 pm-8:05 am
1 stop21h 01m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$544
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Sun 10/18
4:37 pm-8:05 am
1 stop21h 28m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$544
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Mon 11/16
3:00 pm-9:00 am
2 stops23h 00m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$546
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Tue 11/17
9:25 am-8:30 am
2 stops28h 05m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$548
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Mon 11/16
9:25 am-8:30 am
2 stops28h 05m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$548
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Mon 10/26
7:15 am-7:30 am
2 stops30h 15m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$548
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Sun 11/22
12:45 pm-9:05 am
2 stops25h 20m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$566
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Wed 11/18
12:45 pm-9:05 am
2 stops25h 20m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$570
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Tue 11/3
12:20 pm-7:00 am
3 stops47h 40m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$576
SeattleSydney
SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith
SEASYD
Seattle/Tacoma Intl
Tue 9/15
4:15 pm-6:50 pm
1 stop33h 35m
Sydney Kingsford Smith
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$606
Showing 1-10 of 21 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 September.
| 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 $804). Flying from Seattle to Sydney in December is currently the most expensive (average of $1,779). 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 $990 and $1,083 in October.The cheapest round-trip price found within the last 5 days was $849 on Air Canada (Oct 20-Oct 27).
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 50% 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.
Vancouver (YVR) is the most affordable 1-stop option, with an average round-trip price of $625.
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 September 7, 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.
Food
7.8
Comfort
8.2
Crew
8.7
Entertainment
8.0
Overall
8.3
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Food
7.8
Comfort
8.2
Crew
8.7
Entertainment
8.0
Overall
8.3
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Food
7.8
Comfort
8.2
Crew
8.7
Entertainment
8.0
Overall
8.3
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Food
7.8
Comfort
8.2
Crew
8.7
Entertainment
8.0
Overall
8.3
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Food
7.8
Comfort
8.2
Crew
8.7
Entertainment
8.0
Overall
8.3
Boarding
8.5
Reviews
1 / 20
8.0
ExcellentRyan,Aug 2026
JFK - HND
Food
7.8
Comfort
8.2
Crew
8.7
Entertainment
8.0
Overall
8.3
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
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Top 9 airlines flying from Seattle to Sydney
Discover the top 9 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 September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$583 | Average$632 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$780 | Average$1,101 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$803 | Average$1,139 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$812 | Average$898 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$828 | Average$1,358 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$843 | Average$1,258 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$843 | Average$1,432 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$947 | Average$1,410 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$976 | Average$1,126 | FlexibilityNo cancel fee | On-time71% |