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Cheap flights from Adelaide to Seattle from $1,673

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/5. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — SEA
15 May — 22 May1
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 15 April 2026.

Thu 28/512:35
ADL
-
SEA
2 stops25h 02m
Multiple Airlines
Thu 4/617:28
SEA
-
ADL
2 stops25h 37m
Multiple Airlines
Deal found 13/4$1,673
Mon 25/506:05
ADL
-
SEA
2 stops33h 35m
Virgin Australia
Mon 1/617:04
SEA
-
ADL
2 stops32h 36m
Virgin Australia
Deal found 10/4$1,957
Tue 21/706:05
ADL
-
SEA
2 stops22h 59m
United Airlines
Wed 5/808:30
SEA
-
ADL
2 stops33h 05m
United Airlines
Deal found 13/4$1,992
Sat 30/506:00
ADL
-
SEA
2 stops33h 14m
Qantas Airways
Sat 6/617:31
SEA
-
ADL
2 stops25h 54m
Qantas Airways
Deal found 15/4$2,078
Fri 29/506:05
ADL
-
SEA
2 stops26h 45m
Virgin Australia
Fri 5/615:33
SEA
-
ADL
2 stops29h 42m
Virgin Australia
Deal found 14/4$2,096
Fri 17/714:25
ADL
-
SEA
2 stops26h 04m
Multiple Airlines
Thu 30/708:00
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Deal found 12/4$2,266
Tue 21/706:00
ADL
-
SEA
3 stops29h 02m
ANA
Wed 5/816:30
SEA
-
ADL
2 stops52h 55m
ANA
Deal found 13/4$2,324
Tue 21/706:00
ADL
-
SEA
2 stops24h 18m
Multiple Airlines
Wed 5/818:10
SEA
-
ADL
3 stops26h 55m
Multiple Airlines
Deal found 15/4$2,453
Mon 25/514:20
ADL
-
SEA
3 stops40h 46m
Multiple Airlines
Mon 1/619:20
SEA
-
ADL
2 stops24h 00m
Multiple Airlines
Deal found 10/4$2,532

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 15 April 2026.

Round-trip from

$1,673

Popular in

December

Cheapest in

November

Average price

$1,550
28/5-4/6
  • 28/5-4/6
  • 4 total stops
  • 50h 39m total
  • Adelaide to Seattle
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($41 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
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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 15 April 2026.
Use the filters below to find and compare flights from Adelaide to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Tue 21/7

06:05-12:34

2 stops22h 59m

Seattle/Tacoma Intl

Wed 5/8

17:04-10:05

2 stops24h 31m

$1,992

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 17/7

14:25-23:59

2 stops26h 04m

Seattle/Tacoma Intl

Thu 30/7

08:00-16:25

2 stops39h 55m

$2,266

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Tue 21/7

06:00-13:48

2 stops24h 18m

Seattle/Tacoma Intl

Wed 5/8

16:36-11:55

3 stops26h 49m

$2,429
Cheapest one-way

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Thu 30/4

18:30-20:05

2 stops42h 05m

$3,867
Fastest single journey

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Thu 30/4

09:10-08:45

1 stop40h 05m

$10,388

Flights are sorted by cheapest return flights first.

Deals found on 11/4

Sorted by cheapest first

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

How much does it cost for a return flight from Adelaide to Seattle?

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 15 April 2026.
See what other customers who have flown with Virgin Australia,Qantas Airways, andUnited Airlines 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.
Virgin Australia
7.6
Good
453 reviews
Check prices

Boarding

7.7

Comfort

7.5

Entertainment

6.4

Crew

8.2

Overall

7.6

Food

6.4

Reviews

1 / 20
8.0
Excellent

Elio,Jan 2026

MEL - ADL

Starting to be as efficient as qantas… bar the food offerings Virgin is up there now
Virgin Australia
7.6
Good
453 reviews
Virgin Australia
7.6
Good
453 reviews
Check prices

Boarding

7.7

Comfort

7.5

Entertainment

6.4

Crew

8.2

Overall

7.6

Food

6.4

Reviews

1 / 20
8.0
Excellent

Elio,Jan 2026

MEL - ADL

Starting to be as efficient as qantas… bar the food offerings Virgin is up there now
Qantas Airways
7.5
Good
1,019 reviews
Virgin Australia
7.6
Good
453 reviews
Check prices

Boarding

7.7

Comfort

7.5

Entertainment

6.4

Crew

8.2

Overall

7.6

Food

6.4

Reviews

1 / 20
8.0
Excellent

Elio,Jan 2026

MEL - ADL

Starting to be as efficient as qantas… bar the food offerings Virgin is up there now
United Airlines
7.4
Good
9,589 reviews
Virgin Australia
7.6
Good
453 reviews
Check prices

Boarding

7.7

Comfort

7.5

Entertainment

6.4

Crew

8.2

Overall

7.6

Food

6.4

Reviews

1 / 20
8.0
Excellent

Elio,Jan 2026

MEL - ADL

Starting to be as efficient as qantas… bar the food offerings Virgin is up there now
Air Canada
7.1
Good
10,925 reviews
Virgin Australia
7.6
Good
453 reviews
Check prices

Boarding

7.7

Comfort

7.5

Entertainment

6.4

Crew

8.2

Overall

7.6

Food

6.4

Reviews

1 / 20
8.0
Excellent

Elio,Jan 2026

MEL - ADL

Starting to be as efficient as qantas… bar the food offerings Virgin is up there now

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 can get you from Adelaide to Seattle in just under 22h 59m. Your travel time can differ by up to . There are 13409 km between Adelaide and Seattle.

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

    According to our current data, Air Canada ($1,171), Qantas Airways ($1,172), and United Airlines ($1,480) offers the cheapest pricing from Adelaide to Seattle. These flights start at 27% 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
SeaTac
Ocean Shores

Browse thousands of different options on Cheapflights for your next trip

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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 4 airlines flying from Adelaide to Seattle

Discover the top 4 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 15 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,171Average$1,456FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,172Average$1,625FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
United AirlinesCheapest$1,480Average$1,685FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AustraliaCheapest$1,590Average$1,679FlexibilityNo 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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