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Cheap flights from Adelaide to Seattle from $1,449

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — SEA
11 Mar — 18 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 9 February 2026.

Mon 2/314:55
ADL
-
SEA
1 stop24h 36m
United Airlines
Sat 7/323:47
SEA
-
ADL
2 stops63h 03m
United Airlines
Deal found 5/2$1,449
Wed 4/319:55
ADL
-
SEA
2 stops32h 10m
Air Canada
Wed 11/310:10
SEA
-
ADL
2 stops38h 30m
Air Canada
Deal found 5/2$1,450
Wed 4/319:55
ADL
-
SEA
2 stops41h 51m
Air Canada
Thu 12/310:10
SEA
-
ADL
2 stops42h 50m
Air Canada
Deal found 5/2$1,453
Wed 15/706:00
ADL
-
SEA
2 stops23h 21m
Multiple Airlines
Wed 29/714:32
SEA
-
ADL
2 stops26h 23m
Multiple Airlines
Deal found 7/2$1,460
Tue 21/706:00
ADL
-
SEA
2 stops23h 21m
Multiple Airlines
Wed 5/814:32
SEA
-
ADL
2 stops26h 23m
Multiple Airlines
Deal found 6/2$1,469
Mon 2/307:50
ADL
-
SEA
2 stops29h 38m
American Airlines
Tue 10/319:24
SEA
-
ADL
2 stops24h 46m
American Airlines
Deal found 5/2$1,483
Tue 24/316:10
ADL
-
SEA
2 stops22h 02m
Multiple Airlines
Tue 31/317:55
SEA
-
ADL
2 stops23h 40m
Multiple Airlines
Deal found 7/2$1,487
Tue 3/307:50
ADL
-
SEA
2 stops29h 38m
American Airlines
Mon 9/319:24
SEA
-
ADL
2 stops24h 51m
American Airlines
Deal found 5/2$1,490
Mon 2/307:50
ADL
-
SEA
2 stops33h 28m
American Airlines
Wed 11/313:54
SEA
-
ADL
2 stops27h 31m
American Airlines
Deal found 5/2$1,502
Fri 30/1006:10
ADL
-
SEA
2 stops21h 11m
Air Canada
Tue 3/1119:05
SEA
-
ADL
2 stops28h 35m
Air Canada
Deal found 5/2$1,510

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 9 February 2026.

Round-trip from

$1,449

Popular in

December

Cheapest in

November

Average price

$1,500
United Airlines
  • United Airlines
  • 2/3-8/3
  • 4 total stops
  • 64h 38m total
  • Adelaide to Seattle
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($50 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 9 February 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

Wed 4/3

14:55-21:12

2 stops24h 47m

Seattle/Tacoma Intl

Mon 9/3

19:35-09:20

1 stop20h 15m

$1,449

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 2/3

14:55-18:26

1 stop22h 01m

Seattle/Tacoma Intl

Mon 9/3

19:35-09:20

1 stop20h 15m

$1,449

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 4/3

14:55-15:41

1 stop19h 16m

Seattle/Tacoma Intl

Sat 7/3

23:47-09:20

2 stops63h 03m

$1,449

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 4/3

19:55-22:56

2 stops45h 31m

Seattle/Tacoma Intl

Tue 10/3

20:00-18:10

2 stops28h 40m

$1,450

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 15/7

06:00-12:51

2 stops23h 21m

Seattle/Tacoma Intl

Wed 29/7

14:32-09:25

2 stops26h 23m

$1,460

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Tue 21/7

06:00-12:51

2 stops23h 21m

Seattle/Tacoma Intl

Wed 5/8

14:32-09:25

2 stops26h 23m

$1,469

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Tue 24/3

16:10-20:42

2 stops22h 02m

Seattle/Tacoma Intl

Tue 31/3

17:55-11:05

2 stops23h 40m

$1,487

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 2/3

14:55-23:30

1 stop27h 05m

Seattle/Tacoma Intl

Thu 12/3

17:20-09:20

1 stop22h 30m

$1,523

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sat 28/2

14:55-15:41

1 stop19h 16m

Seattle/Tacoma Intl

Sun 8/3

23:59-09:20

2 stops39h 51m

$1,523

Flights are sorted by cheapest return flights first.

Deals found on 5/2

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 60% 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.

Singapore (SIN) is the most affordable one-stop option, with an average return flight price of $3,267.

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 44m.

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 9 February 2026.
See what other customers who have flown with Air New Zealand, 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.
Air New Zealand
8.0
Very Good
582 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Air New Zealand
8.0
Very Good
582 reviews
Air New Zealand
8.0
Very Good
582 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Virgin Australia
7.6
Good
438 reviews
Air New Zealand
8.0
Very Good
582 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Qantas Airways
7.5
Good
988 reviews
Air New Zealand
8.0
Very Good
582 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
United Airlines
7.4
Good
9,259 reviews
Air New Zealand
8.0
Very Good
582 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane
Air Canada
7.1
Good
10,698 reviews
Air New Zealand
8.0
Very Good
582 reviews
Check prices

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.4

Food

7.4

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

David,Jan 2026

AKL - IAH

Couple of spare seats on this flight so people could spread a little. Much better than a full plane

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?

    United Airlines and Air Canada can get you from Adelaide to Seattle in just under 24h 47m. Your travel time can differ by up to 20h 44m. 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 ($873), Qantas Airways ($1,277), and Air Canada ($1,373) offers the cheapest pricing from Adelaide to Seattle. These flights start at 47% 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 5 airlines flying from Adelaide to Seattle

Discover the top 5 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 9 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air New ZealandCheapest$873Average$1,444FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
Qantas AirwaysCheapest$1,277Average$1,689FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,373Average$1,518FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,500Average$1,844FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AustraliaCheapest$1,612Average$1,762FlexibilityNo cancel feeOn-time80%
Search Virgin Australia 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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