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Cheap flights from Adelaide to Seattle from $1,489

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — SEA
28 Feb — 7 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Adelaide to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Adelaide to Seattle
Explore the most affordable flight options available from Adelaide to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 January 2026.

Mon 18/513:25
ADL
-
SEA
2 stops25h 54m
Multiple Airlines
Tue 26/517:26
SEA
-
ADL
2 stops23h 29m
Multiple Airlines
Deal found 29/1$1,489
Sun 17/513:25
ADL
-
SEA
2 stops49h 54m
American Airlines
Tue 26/514:32
SEA
-
ADL
2 stops26h 23m
American Airlines
Deal found 29/1$1,492
Mon 18/513:20
ADL
-
SEA
2 stops25h 59m
American Airlines
Mon 25/514:32
SEA
-
ADL
2 stops30h 38m
American Airlines
Deal found 29/1$1,501
Sun 17/513:25
ADL
-
SEA
2 stops25h 54m
American Airlines
Mon 25/514:32
SEA
-
ADL
2 stops28h 53m
American Airlines
Deal found 29/1$1,586
Sat 14/314:15
ADL
-
SEA
1 stop28h 14m
United Airlines
Sat 21/312:36
SEA
-
ADL
1 stop26h 24m
United Airlines
Deal found 28/1$1,588
Mon 18/517:35
ADL
-
SEA
1 stop31h 40m
Singapore Airlines
Tue 26/510:15
SEA
-
ADL
1 stop61h 35m
Singapore Airlines
Deal found 29/1$1,589
Mon 18/520:00
ADL
-
SEA
3 stops41h 36m
United Airlines
Tue 26/507:00
SEA
-
ADL
2 stops35h 35m
United Airlines
Deal found 29/1$1,800
Tue 21/706:05
ADL
-
SEA
2 stops28h 32m
United Airlines
Wed 5/814:52
SEA
-
ADL
2 stops27h 43m
United Airlines
Deal found 28/1$1,875
Fri 13/306:10
ADL
-
SEA
2 stops23h 44m
United Airlines
Fri 20/323:59
SEA
-
ADL
2 stops39h 01m
United Airlines
Deal found 27/1$1,890
Tue 21/706:00
ADL
-
SEA
2 stops24h 15m
Multiple Airlines
Wed 5/814:32
SEA
-
ADL
2 stops26h 23m
Multiple Airlines
Deal found 27/1$1,910
Fri 30/1018:35
ADL
-
SEA
1 stop31h 05m
Singapore Airlines
Tue 3/1108:45
SEA
-
ADL
1 stop29h 35m
Singapore Airlines
Deal found 26/1$1,936

Find flight deals from Adelaide to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Adelaide (ADL) to Seattle (SEA). 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 29 January 2026.

Round-trip from

$1,489

Popular in

April

Cheapest in

November

Average price

$1,539
Qantas Airways
  • Qantas Airways
  • 18/5-26/5
  • 4 total stops
  • 49h 23m total
  • Adelaide to Seattle
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($275 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($82 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Adelaide 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, Cheapflights users made 647,157 searches. Data last updated 29 January 2026.
Use the filters below to find and compare flights from Adelaide to Seattle that are best for you.

Fly from

Adelaide

Fly to

Seattle

Route

Depart

Return

Price

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 18/5

13:25-22:49

2 stops25h 54m

Seattle/Tacoma Intl

Tue 26/5

17:26-09:25

2 stops23h 29m

$1,489

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 18/5

13:25-22:49

2 stops49h 54m

Seattle/Tacoma Intl

Wed 27/5

07:00-09:25

2 stops33h 55m

$1,492

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sun 17/5

13:25-22:49

2 stops49h 54m

Seattle/Tacoma Intl

Tue 26/5

14:32-09:25

2 stops26h 23m

$1,492

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 18/5

13:20-22:49

2 stops25h 59m

Seattle/Tacoma Intl

Mon 25/5

14:32-13:40

2 stops30h 38m

$1,501

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sat 14/3

14:15-00:59

1 stop28h 14m

Seattle/Tacoma Intl

Sat 21/3

12:36-08:30

1 stop26h 24m

$1,588

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 18/5

17:35-08:45

1 stop31h 40m

Seattle/Tacoma Intl

Tue 26/5

10:15-16:20

1 stop61h 35m

$1,589

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 18/5

20:00-21:06

3 stops41h 36m

Seattle/Tacoma Intl

Tue 26/5

07:00-11:05

2 stops35h 35m

$1,800

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Tue 21/7

06:05-18:07

2 stops28h 32m

Seattle/Tacoma Intl

Wed 5/8

14:52-11:05

2 stops27h 43m

$1,875

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 13/3

06:10-12:24

2 stops23h 44m

Seattle/Tacoma Intl

Fri 20/3

23:59-08:30

2 stops39h 01m

$1,890

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Tue 21/7

06:00-13:45

2 stops24h 15m

Seattle/Tacoma Intl

Wed 5/8

14:32-09:25

2 stops26h 23m

$1,910

Flights are sorted by cheapest return flights first.

Deals found on 29/1

Best time to book a flight from Adelaide to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Adelaide 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.

Cheapflights Insights

Everything you need to know about your flight from Adelaide to Seattle

What’s the top stopover airport for flights from Adelaide to Seattle?

Share of one-stop return flights from Adelaide to Seattle chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Singapore (SIN) – chosen by Cheapflights users on 64% of one-stop itineraries from Adelaide to Seattle on Cheapflights.

What’s the cheapest stopover airport for flights from Adelaide to Seattle?

Average return fare for one-stop flights from Adelaide to Seattle, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Doha (DOH) is the most affordable one-stop option, with an average return flight price of $2,941.

What’s the fastest stopover option from Adelaide to Seattle?

Shortest average travel time for one-stop one-way flights from Adelaide to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via San Francisco (SFO) have the shortest average one-way travel time for one-stop routes: 19h 15m.

Which airport typically offers the quickest stopover for flights from Adelaide to Seattle?

Average stopover duration for one-stop one-way flights from Adelaide to Seattle, 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 stopover time of 1h 43m.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 29 January 2026.
See what other customers who have flown with Singapore Airlines, Virgin Australia, andQantas Airways from Adelaide to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very Good
1,440 reviews
Check prices

Entertainment

8.0

Overall

8.2

Boarding

8.3

Crew

8.6

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Singapore Airlines
8.2
Very Good
1,440 reviews
Singapore Airlines
8.2
Very Good
1,440 reviews
Check prices

Entertainment

8.0

Overall

8.2

Boarding

8.3

Crew

8.6

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Virgin Australia
7.6
Good
432 reviews
Singapore Airlines
8.2
Very Good
1,440 reviews
Check prices

Entertainment

8.0

Overall

8.2

Boarding

8.3

Crew

8.6

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Qantas Airways
7.5
Good
981 reviews
Singapore Airlines
8.2
Very Good
1,440 reviews
Check prices

Entertainment

8.0

Overall

8.2

Boarding

8.3

Crew

8.6

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
United Airlines
7.4
Good
9,215 reviews
Singapore Airlines
8.2
Very Good
1,440 reviews
Check prices

Entertainment

8.0

Overall

8.2

Boarding

8.3

Crew

8.6

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.
Air Canada
7.1
Good
10,667 reviews
Singapore Airlines
8.2
Very Good
1,440 reviews
Check prices

Entertainment

8.0

Overall

8.2

Boarding

8.3

Crew

8.6

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Wee Keng,Dec 2025

HKG - SIN

Quick 3 hour flight with excellent service from the crew despite it being Christmas Day holiday. Ground crew passed out Xmas cookies as well. Great experience.

Related info for your journey

Find useful and relevant information for your journey from Adelaide to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Adelaide to Seattle?

    American Airlines and United Airlines can get you from Adelaide to Seattle in just under 28h 14m. Your travel time can differ by up to 21h 40m. There are 13409 km between Adelaide and Seattle. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Adelaide to Seattle round-trip?

    According to our current data, Air New Zealand ($875), Qantas Airways ($1,279), and Singapore Airlines ($1,327) offers the cheapest pricing from Adelaide to Seattle. These flights start at 49% lower than the current average price 3 months from now.

  • Can I find deals for flights from Adelaide to Seattle that include hotel bookings?

    Yes. In addition to deals on Adelaide to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Adelaide to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Adelaide to Seattle.

  • Can I find deals for business class flights from Adelaide to Seattle?

    Yes. Cheapflights offers flight deals from Adelaide to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Ocean Shores

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Alternative routes for Adelaide to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Adelaide to Portland flights

Top 6 airlines flying from Adelaide to Seattle

Discover the top 6 airlines that operate flights from Adelaide to Seattle. 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 647,157 searches. Data last updated 29 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air New ZealandCheapest$875Average$1,447FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
Qantas AirwaysCheapest$1,279Average$1,693FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Singapore AirlinesCheapest$1,327Average$1,643FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Air CanadaCheapest$1,376Average$1,521FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AustraliaCheapest$1,615Average$1,805FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights
United AirlinesCheapest$1,627Average$1,908FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 Adelaide to Seattle?

Cheapflights helps you search for flights from Adelaide to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Adelaide to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Adelaide to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Adelaide to Seattle with no change fees?

Certainly. Search results for flights to Seattle from Adelaide shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Adelaide to Seattle become cheaper?

Yes! Start tracking prices for Adelaide to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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