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Cheap flights from Adelaide to Seattle from $1,591

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/2. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — SEA
14 Feb — 21 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 January 2026.

Round-trip from

$1,591

Popular in

April

Cheapest in

November

Average price

$1,612
Qantas Airways
  • Qantas Airways
  • 27/2-6/3
  • 4 total stops
  • 55h 57m total
  • Adelaide to Seattle
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($305 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($90 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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Find 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 January 2026.

Fri 27/206:00
ADL
-
SEA
2 stops31h 27m
Qantas Airways
Fri 6/316:50
SEA
-
ADL
2 stops24h 30m
Qantas Airways
Deal found 13/1$1,591
Fri 27/218:35
ADL
-
SEA
1 stop31h 05m
Singapore Airlines
Fri 6/308:45
SEA
-
ADL
1 stop62h 05m
Singapore Airlines
Deal found 13/1$1,902
Tue 21/706:00
ADL
-
SEA
2 stops24h 15m
Multiple Airlines
Wed 5/814:32
SEA
-
ADL
2 stops26h 23m
Multiple Airlines
Deal found 14/1$1,947
Fri 30/1018:35
ADL
-
SEA
1 stop31h 05m
Singapore Airlines
Tue 3/1108:45
SEA
-
ADL
1 stop29h 35m
Singapore Airlines
Deal found 14/1$1,964
Tue 21/715:15
ADL
-
SEA
2 stops24h 10m
American Airlines
Wed 5/814:32
SEA
-
ADL
2 stops26h 23m
American Airlines
Deal found 13/1$1,980
Fri 27/218:20
ADL
-
SEA
3 stops33h 41m
Multiple Airlines
Fri 6/308:45
SEA
-
ADL
2 stops36h 00m
Multiple Airlines
Deal found 13/1$2,164

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 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

Fri 27/2

18:35-07:10

1 stop31h 05m

Seattle/Tacoma Intl

Fri 6/3

08:45-17:20

1 stop62h 05m

$1,902

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 27/2

18:20-09:31

3 stops33h 41m

Seattle/Tacoma Intl

Fri 6/3

08:45-15:15

2 stops36h 00m

$2,164

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 28/1

07:50-12:29

2 stops23h 09m

Seattle/Tacoma Intl

Wed 28/1

16:05-17:05

1 stop30h 30m

$3,380

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sun 1/3

20:55-09:55

2 stops31h 30m

Seattle/Tacoma Intl

Thu 5/3

12:30-09:25

2 stops26h 25m

$7,947

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Thu 28/5

12:40-23:59

2 stops27h 49m

Seattle/Tacoma Intl

Thu 18/6

08:00-22:35

2 stops22h 05m

$9,260

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Thu 28/5

09:10-08:45

1 stop40h 05m

Seattle/Tacoma Intl

Thu 18/6

10:15-07:25

1 stop28h 40m

$10,725

Flights are sorted by cheapest return flights first.

Deals found on 13/1

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 75% 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 $2,800.

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 15 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
8.1
Very Good
1,431 reviews
Check prices

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.1

Crew

8.6

Entertainment

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
8.1
Very Good
1,431 reviews
Singapore Airlines
8.1
Very Good
1,431 reviews
Check prices

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.1

Crew

8.6

Entertainment

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
430 reviews
Singapore Airlines
8.1
Very Good
1,431 reviews
Check prices

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.1

Crew

8.6

Entertainment

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
971 reviews
Singapore Airlines
8.1
Very Good
1,431 reviews
Check prices

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.1

Crew

8.6

Entertainment

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
9,157 reviews
Singapore Airlines
8.1
Very Good
1,431 reviews
Check prices

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.1

Crew

8.6

Entertainment

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
10,620 reviews
Singapore Airlines
8.1
Very Good
1,431 reviews
Check prices

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.1

Crew

8.6

Entertainment

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?

    Singapore Airlines can get you from Adelaide to Seattle in just under 31h 05m. 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 New Zealand ($917), Qantas Airways ($1,340), and Singapore Airlines ($1,390) 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 15 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air New ZealandCheapest$917Average$1,516FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
Qantas AirwaysCheapest$1,340Average$1,773FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Singapore AirlinesCheapest$1,390Average$1,721FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Air CanadaCheapest$1,441Average$1,604FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AustraliaCheapest$1,692Average$1,890FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights
United AirlinesCheapest$1,704Average$1,988FlexibilityNo 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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