Latest deals
Insights
When to book
FAQs
Price Alerts
Look for other cheap flights to Seattle/Tacoma Intl

$549 Cheap flights to Seattle

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Seattle departing on 16/9. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Australia to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
09:20 - 10:05
SYD
-
SEA
17h 45m
1 stop
Air Canada Logo
05:50 - 07:20
SEA
-
SYD
32h 30m
1 stop
$1,227Air Canada
Mon, 24 Aug - Tue, 8 Sep
Air Canada Logo
09:20 - 10:05
SYD
-
SEA
17h 45m
1 stop
Air Canada Logo
19:15 - 20:40
SEA
-
SYD
32h 25m
2 stops
$1,248Air Canada
Mon, 24 Aug - Tue, 8 Sep
Qantas Airways Logo
09:10 - 19:39
SYD
-
SEA
27h 29m
1 stop
Qantas Airways Logo
17:55 - 09:00
SEA
-
SYD
20h 05m
1 stop
$1,262Qantas Airways
Tue, 8 Sep - Tue, 10 Nov
Qantas Airways Logo
10:10 - 12:16
SYD
-
SEA
20h 06m
1 stop
Qantas Airways Logo
17:55 - 09:00
SEA
-
SYD
20h 05m
1 stop
$1,265Qantas Airways
Thu, 22 Oct - Wed, 11 Nov
British Airways Logo
09:10 - 21:52
SYD
-
SEA
29h 42m
2 stops
British Airways Logo
07:10 - 07:05
SEA
-
SYD
30h 55m
1 stop
$1,265British Airways
Mon, 14 Sep - Mon, 21 Sep
American Airlines Logo
09:10 - 15:57
SYD
-
SEA
23h 47m
1 stop
American Airlines Logo
13:35 - 09:00
SEA
-
SYD
24h 25m
1 stop
$1,277American Airlines
Thu, 10 Sep - Sun, 8 Nov
American Airlines Logo
09:10 - 17:34
SYD
-
SEA
25h 24m
2 stops
American Airlines Logo
12:47 - 09:00
SEA
-
SYD
25h 13m
2 stops
$1,277American Airlines
Thu, 10 Sep - Sun, 8 Nov
Multiple Airlines Logo
06:00 - 10:05
SYD
-
SEA
21h 05m
2 stops
Multiple Airlines Logo
15:00 - 07:20
SEA
-
SYD
23h 20m
1 stop
$1,282Multiple Airlines
Wed, 23 Sep - Wed, 30 Sep
Delta Logo
09:15 - 14:50
SYD
-
SEA
22h 35m
2 stops
Delta Logo
09:18 - 08:30
SEA
-
SYD
28h 12m
2 stops
$1,302Delta
Wed, 9 Sep - Mon, 9 Nov
Delta Logo
10:15 - 14:50
SYD
-
SEA
22h 35m
2 stops
Delta Logo
19:55 - 08:30
SEA
-
SYD
41h 35m
2 stops
$1,302Delta
Tue, 20 Oct - Sat, 14 Nov

momondo Fare Finder

 
Locate flights to Seattle/Tacoma Intl that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 78,305 searches and data was last updated on 4 August 2026.
Use the filters below to find and compare flights to Seattle that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 24/8

09:20-10:05

1 stop17h 45m

Seattle/Tacoma Intl

Tue 8/9

05:50-07:20

1 stop32h 30m

$1,227

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 24/8

09:20-10:05

1 stop17h 45m

Seattle/Tacoma Intl

Tue 8/9

19:15-20:40

2 stops32h 25m

$1,248

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Tue 8/9

09:10-19:39

1 stop27h 29m

Seattle/Tacoma Intl

Tue 10/11

17:55-09:00

1 stop20h 05m

$1,262
Fastest return journey

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 22/10

10:10-12:16

1 stop20h 06m

Seattle/Tacoma Intl

Wed 11/11

17:55-09:00

1 stop20h 05m

$1,265

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 14/9

09:10-21:52

2 stops29h 42m

Seattle/Tacoma Intl

Mon 21/9

07:10-07:05

1 stop30h 55m

$1,265

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 10/9

09:10-15:57

1 stop23h 47m

Seattle/Tacoma Intl

Sun 8/11

13:35-09:00

1 stop24h 25m

$1,277

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 10/9

09:10-17:34

2 stops25h 24m

Seattle/Tacoma Intl

Sun 8/11

12:47-09:00

2 stops25h 13m

$1,277

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 23/9

06:00-10:05

2 stops21h 05m

Seattle/Tacoma Intl

Wed 30/9

15:00-07:20

1 stop23h 20m

$1,282

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 9/9

09:15-14:50

2 stops22h 35m

Seattle/Tacoma Intl

Mon 9/11

09:18-08:30

2 stops28h 12m

$1,302

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Tue 20/10

10:15-14:50

2 stops22h 35m

Seattle/Tacoma Intl

Sat 14/11

19:55-08:30

2 stops41h 35m

$1,302

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Seattle from

Seattle flights insights and trends

Explore insights for your Seattle flight to craft the best travel plan

What is the cheapest month to fly to Seattle?

The month of August is, on average, the cheapest month to fly to Seattle from Australia, with most prices found around $1,214. If you are unable to visit Seattle during the month of August, then departing from Australia during the month September is also very affordable. Most momondo users find prices during this month for around $1,388.

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

You are more likely to see cheaper flights to Seattle from Australia when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $1,521 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 Australia for as low as $941 on momondo.

Cheapest flights to Seattle/Tacoma Intl

Find the cheapest flights to Seattle/Tacoma Intl from your nearest city or airport

Cheap Seattle flight deals and tips

Summary info about Seattle flight prices, duration and airlines

Best One-Way Price

$549

Best Round-Trip Price

$1,227

Fastest flight time

21h 55m

Popular in

September
The best one-way flight price to Seattle from Australia in the last 5 days is $549 (Sydney Kingsford Smith to Seattle/Tacoma Intl).
Search Deals
The best return flight price to Seattle from Australia in the last 5 days is $1,227 (Sydney Kingsford Smith to Seattle/Tacoma Intl).
Search Deals
The fastest flight to Seattle from Australia takes 21h 55m (Sydney Kingsford Smith to Seattle/Tacoma Intl).
Search Deals
September has the highest demand for flights to Seattle, with a 8% price increase on average.
Search Deals

Frequently asked questions about flying to Seattle

What is there to do in Seattle when it’s raining?

When planning your flight to Seattle, it is important to be aware that some months are not as ideal as others. Specifically, the months of January, November, or December could carry a higher chance of rain, as Seattle sees up to 5.1 inches (130 mm) or more. There are still things to do in Seattle even when it's raining, but be aware that rain is highly probable in the area. For those looking to get out of the rain and do a little shopping, check out Seattle Waterfront.

When is it best to fly to Seattle to go sightseeing?

The city of Seattle has many sights to see while visiting. Many tourists find it ideal to go sightseeing when the weather is warmer, but not blistering. Consider booking your flight to Seattle for October, when temperatures are a bit higher and the chance of rain is relatively low. Many travellers find it worthwhile to visit Space Needle and Seattle Waterfront.

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

The ideal time to book your flight to Seattle is 77 days in advance, when prices tend to average $1,521.

Is there an alternative airport near Seattle?

Seattle Lake Union Spb Airport, Seattle King County/Boeing Airport, Kenmore Air Harbor Airport, Everett Paine Field Airport or Lopez Island Airport can be an alternative airport used for travel to Seattle.

When did momondo last update prices for flights to Seattle/Tacoma Intl Airport?

Prices for flights to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights to Seattle/Tacoma Intl Airport?

As of August 2026, there are 12 operators available to choose from for flights to Seattle/Tacoma Intl Airport.

How old do you have to be to fly to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel to Seattle/Tacoma Intl Airport.

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

The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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 to Seattle?

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

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

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

How can momondo help me find flights to Seattle?

momondo helps you find the best flight to Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select fights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight 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 and alert you when they change.

An easier way to manage your Seattle/Tacoma Intl trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 3/9
Thu 10/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Seattle