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Cheap flights from Sydney to Seattle from $681

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sydney to Seattle departing on 29/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Sydney to Seattle (SYD-SEA)

Cheap return flights

United Airlines Logo
12:10 - 22:47SYD-SEA
29h 37m2 stops
United Airlines Logo
12:35 - 06:20SEA-SYD
22h 45m1 stop
$1,282United Airlines
Find Deal
Fri, 12 Dec - Thu, 1 Jan
Air Canada Logo
16:00 - 19:16SYD-SEA
22h 16m1 stop
Air Canada Logo
20:00 - 21:45SEA-SYD
30h 45m2 stops
$1,291Air Canada
Find Deal
Thu, 25 Dec - Sun, 4 Jan
Logo
09:20 - 22:16SYD-SEA
29h 56m1 stop
Logo
23:16 - 07:20SEA-SYD
39h 04m1 stop
$1,307
Find Deal
Mon, 15 Sep - Tue, 16 Sep
Air Canada Logo
09:00 - 09:31SYD-SEA
19h 31m2 stops
Air Canada Logo
20:00 - 14:40SEA-SYD
23h 40m2 stops
$1,343Air Canada
Find Deal
Thu, 20 Nov - Fri, 28 Nov
United Airlines Logo
10:20 - 09:43SYD-SEA
40h 23m2 stops
United Airlines Logo
12:43 - 06:55SEA-SYD
25h 12m2 stops
$1,434United Airlines
Find Deal
Sun, 14 Sep - Mon, 15 Sep
Delta Logo
10:40 - 16:17SYD-SEA
24h 37m1 stop
Delta Logo
13:45 - 06:50SEA-SYD
22h 05m1 stop
$1,569Delta
Find Deal
Thu, 25 Dec - Sun, 4 Jan
Virgin Australia Logo
14:00 - 08:24SYD-SEA
37h 24m1 stop
Virgin Australia Logo
17:54 - 09:15SEA-SYD
20h 21m1 stop
$1,583Virgin Australia
Find Deal
Fri, 12 Dec - Thu, 1 Jan
Hawaiian Airlines Logo
21:40 - 23:19SYD-SEA
18h 39m1 stop
Hawaiian Airlines Logo
07:44 - 19:45SEA-SYD
18h 01m1 stop
$1,626Hawaiian Airlines
Find Deal
Thu, 2 Oct - Thu, 9 Oct
Hawaiian Airlines Logo
21:40 - 23:19SYD-SEA
18h 39m1 stop
Hawaiian Airlines Logo
07:44 - 19:45SEA-SYD
18h 01m1 stop
$1,668Hawaiian Airlines
Find Deal
Thu, 2 Oct - Thu, 9 Oct
Virgin Australia Logo
12:10 - 00:59SYD-SEA
31h 49m1 stop
Virgin Australia Logo
12:35 - 06:20SEA-SYD
22h 45m1 stop
$1,685Virgin Australia
Find Deal
Mon, 15 Dec - Fri, 2 Jan

Air Canada flights from Sydney to Seattle

Our best Air Canada deals on Sydney to Seattle flight tickets
Air Canada
25 Dec
SYD16:00Sydney Kingsford Smith
22h 16m
1 stop
SEA19:16Seattle/Tacoma Intl
4 Jan
SEA20:00Seattle/Tacoma Intl
30h 45m
2 stops
SYD21:45Sydney Kingsford Smith
$1,291
Find similar
Air Canada
20 Nov
SYD09:00Sydney Kingsford Smith
19h 31m
2 stops
SEA09:31Seattle/Tacoma Intl
28 Nov
SEA20:00Seattle/Tacoma Intl
23h 40m
2 stops
SYD14:40Sydney Kingsford Smith
$1,343
Find similar

Asiana Airlines flights from Sydney to Seattle

Our best Asiana Airlines deals on Sydney to Seattle flight tickets
Asiana Airlines
20 Nov
SYD10:30Sydney Kingsford Smith
22h 25m
1 stop
SEA13:55Seattle/Tacoma Intl
27 Nov
SEA00:10Seattle/Tacoma Intl
37h 20m
1 stop
SYD08:30Sydney Kingsford Smith
$1,451
Find similar
Asiana Airlines
25 Dec
SYD10:30Sydney Kingsford Smith
22h 25m
1 stop
SEA13:55Seattle/Tacoma Intl
3 Jan
SEA00:10Seattle/Tacoma Intl
37h 20m
1 stop
SYD08:30Sydney Kingsford Smith
$2,466
Find similar
Asiana Airlines
20 Nov
SYD10:30Sydney Kingsford Smith
29h 21m
2 stops
SEA20:51Seattle/Tacoma Intl
27 Nov
SEA00:10Seattle/Tacoma Intl
37h 20m
1 stop
SYD08:30Sydney Kingsford Smith
$2,495
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Sydney to Seattle 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, momondo users made 78,305 searches. Data last updated 19 August 2025.
Use the filters below to find and compare flights from Sydney to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 12/12

12:10-22:47

2 stops29h 37m

Seattle/Tacoma Intl

Thu 1/1

12:35-06:20

1 stop22h 45m

$1,282

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 25/12

16:00-19:16

1 stop22h 16m

Seattle/Tacoma Intl

Sun 4/1

20:00-21:45

2 stops30h 45m

$1,291

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 15/9

09:20-22:16

1 stop29h 56m

Seattle/Tacoma Intl

Tue 16/9

23:16-07:20

1 stop39h 04m

$1,307

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 20/11

09:00-09:31

2 stops19h 31m

Seattle/Tacoma Intl

Fri 28/11

20:00-14:40

2 stops23h 40m

$1,343

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 14/9

10:20-09:43

2 stops40h 23m

Seattle/Tacoma Intl

Mon 15/9

12:43-06:55

2 stops25h 12m

$1,434

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 25/12

10:40-16:17

1 stop24h 37m

Seattle/Tacoma Intl

Sun 4/1

13:45-06:50

1 stop22h 05m

$1,569

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 12/12

14:00-08:24

1 stop37h 24m

Seattle/Tacoma Intl

Thu 1/1

17:54-09:15

1 stop20h 21m

$1,583

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 2/10

21:40-23:19

1 stop18h 39m

Seattle/Tacoma Intl

Thu 9/10

07:44-19:45

1 stop18h 01m

$1,626

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 2/10

21:40-23:19

1 stop18h 39m

Seattle/Tacoma Intl

Thu 9/10

07:44-19:45

1 stop18h 01m

$1,668

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 15/12

12:10-00:59

1 stop31h 49m

Seattle/Tacoma Intl

Fri 2/1

12:35-06:20

1 stop22h 45m

$1,685

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Sydney to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Sydney and Seattle?

What is the cheapest month to fly to Seattle?

The month of February is, on average, the cheapest month to fly to Seattle from Sydney, with most prices found around $1,540. If you are unable to visit Seattle during the month of February, then departing from Sydney during the month August is also very affordable. Most momondo users find prices during this month for around $1,545.

What is the cheapest day to depart on your flight to Seattle?

The cheapest day to depart from Sydney to Seattle is on a Thursday. Travellers who choose to depart for Seattle on a Thursday will often find tickets for as low as $1,581. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Sydney to Seattle for around $1,817.

What is the cheapest time of day to depart on your flight to Seattle?

According to our data, the cheapest time of day to fly to Seattle is at midday. momondo users have found flights departing from Sydney to Seattle at midday for as low as $1,507. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Seattle is in the afternoon when prices are around $1,839.

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

You are more likely to see cheaper flights to Seattle from Sydney when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $1,715 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Sydney for as low as $1,463 on momondo.

How have Sydney to Seattle flight prices changed over time?

As of August 2025, prices for Sydney to Seattle flights are approximately 35% cheaper when compared to flights at the same time last year.

When to book flights from Sydney to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Sydney to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Sydney to Seattle (SYD to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sydney to Seattle

Best price found

$681

Fastest flight time

17h 02m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Sydney in the past 72 hours is $681. The best return flight deal from Sydney to Seattle found on momondo in the last 72 hours is $1,282.
The fastest flight from Sydney to Seattle takes 17h 02m
There are no direct flights from Sydney to Seattle. Popular non-direct route for this connection is Sydney Kingsford Smith Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • How far is Sydney Kingsford Smith to Seattle/Tacoma Intl by plane?

    There are 12462.2 km between Sydney Kingsford Smith and Seattle/Tacoma Intl. A reasonable flight in good conditions will take 17h 02m.

  • When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Sydney to Seattle?

Best airlines flying from Sydney to Seattle

Compare and see reviews for airlines that fly from Sydney to Seattle with momondo
Airline
Rating
Free cancellation
Price
Alaska AirlinesPriceFrom $352Free cancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
DeltaPriceFrom $1,166Free cancellationRating
7.9
7,981 reviews
Search Delta flights
Air CanadaPriceFrom $1,194Free cancellationRating
7.1
9,997 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,221Free cancellationRating
7.4
8,922 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $1,273Free cancellationRating
7.5
896 reviews
Search Qantas Airways flights
Philippine AirlinesPriceFrom $1,335Free cancellationRating
7.2
895 reviews
Search Philippine Airlines flights
Hawaiian AirlinesPriceFrom $1,359Free cancellationRating
7.8
2,665 reviews
Search Hawaiian Airlines flights
Air New ZealandPriceFrom $1,379Free cancellationRating
8.0
504 reviews
Search Air New Zealand flights
Asiana AirlinesPriceFrom $1,418Free cancellationRating
8.2
476 reviews
Search Asiana Airlines flights
Virgin AustraliaPriceFrom $1,449Free cancellationRating
7.5
412 reviews
Search Virgin Australia flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
SeaTac

Why use momondo?

Why should I use momondo to find a flight deal from Sydney to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Sydney to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Sydney to Seattle with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seattle from Sydney which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Sydney to Seattle?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Sydney to Seattle.

I’m not ready to book a flight from Sydney to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Sydney and alert you when they change.

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