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Cheap flights from Adelaide to Seattle from $1,107

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — SEA
4 May — 11 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 4 April 2026.

Tue 21/706:05
ADL
-
SEA
2 stops26h 45m
United Airlines
Wed 5/813:30
SEA
-
ADL
2 stops29h 05m
United Airlines
Deal found 1/4$2,000
Wed 15/709:10
ADL
-
SEA
1 stop40h 05m
Singapore Airlines
Sun 26/710:15
SEA
-
ADL
1 stop28h 40m
Singapore Airlines
Deal found 31/3$2,242
Fri 17/714:25
ADL
-
SEA
2 stops32h 04m
Multiple Airlines
Thu 30/708:00
SEA
-
ADL
2 stops22h 05m
Multiple Airlines
Deal found 1/4$2,271
Thu 12/1117:10
ADL
-
SEA
2 stops22h 05m
Multiple Airlines
Mon 16/1107:00
SEA
-
ADL
2 stops33h 25m
Multiple Airlines
Deal found 3/4$2,274
Wed 2/909:10
ADL
-
SEA
1 stop40h 05m
Singapore Airlines
Sun 6/910:15
SEA
-
ADL
1 stop28h 40m
Singapore Airlines
Deal found 31/3$2,347

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 4 April 2026.

Round-trip from

$2,000

One-way from

$1,107

Popular in

June

Cheapest in

November

Average price

$1,598
United Airlines
  • United Airlines
  • 21/7-5/8
  • 4 total stops
  • 55h 50m total
  • Adelaide to Seattle
Search Deals
25/5
  • 25/5
  • 2 total stops
  • 28h 24m total
  • Adelaide to Seattle
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($142 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($39 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 4 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

$2,011

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 17/7

14:25-05:59

2 stops32h 04m

Seattle/Tacoma Intl

Thu 30/7

08:00-18:25

2 stops41h 55m

$2,277

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 2/9

09:10-08:45

1 stop40h 05m

Seattle/Tacoma Intl

Sun 6/9

10:15-07:25

1 stop28h 40m

$2,347

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 2/9

16:30-18:32

2 stops42h 32m

Seattle/Tacoma Intl

Sun 6/9

19:20-13:55

2 stops26h 05m

$2,492
Cheapest one-way

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 25/5

17:15-18:56

3 stops42h 11m

$1,160

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 25/5

17:35-08:45

1 stop31h 40m

$1,401

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sat 18/4

12:35-09:27

3 stops37h 22m

$1,401

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 15/4

19:35-00:59

2 stops45h 54m

$1,511

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 17/4

06:25-06:00

2 stops40h 05m

$1,741

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sat 18/4

17:35-08:15

1 stop31h 10m

$3,068

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 12 resultsSorted by cheapest first
1
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

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 4 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
451 reviews
Check prices

Food

6.4

Overall

7.6

Entertainment

6.4

Crew

8.2

Boarding

7.7

Comfort

7.5

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
451 reviews
Virgin Australia
7.6
Good
451 reviews
Check prices

Food

6.4

Overall

7.6

Entertainment

6.4

Crew

8.2

Boarding

7.7

Comfort

7.5

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
1,016 reviews
Virgin Australia
7.6
Good
451 reviews
Check prices

Food

6.4

Overall

7.6

Entertainment

6.4

Crew

8.2

Boarding

7.7

Comfort

7.5

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
9,542 reviews
Virgin Australia
7.6
Good
451 reviews
Check prices

Food

6.4

Overall

7.6

Entertainment

6.4

Crew

8.2

Boarding

7.7

Comfort

7.5

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
10,890 reviews
Virgin Australia
7.6
Good
451 reviews
Check prices

Food

6.4

Overall

7.6

Entertainment

6.4

Crew

8.2

Boarding

7.7

Comfort

7.5

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 ($1,207), Qantas Airways ($1,208), and United Airlines ($1,526) 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

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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 4 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$1,207Average$1,500FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Qantas AirwaysCheapest$1,208Average$1,674FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
United AirlinesCheapest$1,526Average$1,736FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AustraliaCheapest$1,638Average$1,730FlexibilityNo 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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