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Cheap flights from Adelaide to Seattle from $867

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 22/8. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — SEA
8 Jul — 15 Jul1
1 adult

Cheapflights Tip: The best prices from Adelaide to Seattle/Tacoma Intl are usually found in November or February, booked 53 days in advance, depart on a Tuesday or Monday and return on a Monday

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 3 July 2025.

Round-trip from

$1,473

One-way from

$878

Popular in

December

Cheapest in

November

Average price

$1,754
Air Canada
  • Air Canada
  • 30/7-6/8
  • 4 total stops
  • 64h 36m total
  • Adelaide to Seattle
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22/8
  • 22/8
  • 2 total stops
  • 39h 09m total
  • Adelaide to Seattle
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($212 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($91 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Adelaide to Seattle

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 3 July 2025.

Wed 30/720:00ADL - SEA
2 stops29h 51mAir Canada
Wed 6/814:55SEA - ADL
2 stops34h 45mAir Canada
Deal found 2/7$1,473
Mon 15/1214:55ADL - SEA
1 stop18h 49mUnited Airlines
Sat 17/115:25SEA - ADL
1 stop23h 35mUnited Airlines
Deal found 2/7$1,696
Mon 4/811:55ADL - SEA
2 stops26h 51mAir New Zealand
Sun 31/806:25SEA - ADL
3 stops47h 40mAir New Zealand
Deal found 2/7$1,714
Sun 17/806:25ADL - SEA
2 stops31h 38mMultiple Airlines
Sun 24/814:32SEA - ADL
2 stops38h 58mMultiple Airlines
Deal found 3/7$1,853
Mon 4/816:55ADL - SEA
2 stops43h 20mChina Airlines
Sat 30/801:40SEA - ADL
2 stops45h 25mChina Airlines
Deal found 2/7$2,513
Sun 17/809:10ADL - SEA
2 stops40h 10mSingapore Airlines
Sun 24/810:15SEA - ADL
1 stop28h 40mSingapore Airlines
Deal found 3/7$2,574
Wed 30/721:40ADL - SEA
1 stop31h 35mQatar Airways
Wed 6/816:30SEA - ADL
1 stop30h 50mQatar Airways
Deal found 2/7$3,321

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 3 July 2025.
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 30/7

20:00-09:21

2 stops29h 51m

Seattle/Tacoma Intl

Wed 6/8

14:55-18:10

2 stops34h 45m

$1,473

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 4/8

11:55-20:57

2 stops25h 32m

Seattle/Tacoma Intl

Sun 31/8

21:40-10:55

2 stops44h 45m

$1,649

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 15/12

14:55-15:14

1 stop18h 49m

Seattle/Tacoma Intl

Sat 17/1

15:25-09:30

1 stop23h 35m

$1,696

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 4/8

11:55-00:59

2 stops29h 34m

Seattle/Tacoma Intl

Sun 31/8

06:25-22:35

3 stops47h 40m

$1,704

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 4/8

16:55-19:45

2 stops43h 20m

Seattle/Tacoma Intl

Sat 30/8

01:40-15:35

2 stops45h 25m

$2,501

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 4/8

17:35-08:45

1 stop31h 40m

Seattle/Tacoma Intl

Sun 31/8

10:15-07:25

1 stop52h 40m

$2,784

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Wed 17/12

07:05-19:55

2 stops31h 20m

Seattle/Tacoma Intl

Tue 20/1

17:40-19:35

2 stops31h 25m

$3,084

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 25/7

21:40-12:45

1 stop31h 35m

Seattle/Tacoma Intl

Fri 15/8

16:30-06:40

2 stops45h 40m

$3,318

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 22/8

06:25-07:54

2 stops41h 59m

$867

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 22/8

19:15-21:33

2 stops42h 48m

$1,044

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 14 results
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 far ahead should I book a flight from Adelaide to Seattle?

Use this chart to determine the optimal time to book a return flight from Adelaide to Seattle. Price data was last updated on 27 June 2025.

The best time to book flights from Adelaide to Seattle is 53 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Adelaide to Seattle?

Currently, March is the cheapest month in which you can book a flight from Adelaide to Seattle (average of $875). Flying from Adelaide to Seattle in December is currently the most expensive (average of $1,404). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ADL to SEA?

Find hourly flight availability from Adelaide to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 July 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 26% on flights from Adelaide to Seattle by exploring options for tickets in the afternoon.

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 3 July 2025.
See what other customers who have flown with China Airlines, Singapore Airlines, andAir New Zealand 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.
China Airlines
8.3
Very Good
747 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.3

Boarding

8.3

Crew

8.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
China Airlines
8.3
Very Good
747 reviews
China Airlines
8.3
Very Good
747 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.3

Boarding

8.3

Crew

8.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Singapore Airlines
8.1
Very Good
1,320 reviews
China Airlines
8.3
Very Good
747 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.3

Boarding

8.3

Crew

8.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Air New Zealand
8.0
Very Good
486 reviews
China Airlines
8.3
Very Good
747 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.3

Boarding

8.3

Crew

8.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Qantas Airways
7.5
Good
872 reviews
China Airlines
8.3
Very Good
747 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.3

Boarding

8.3

Crew

8.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Qatar Airways
7.4
Good
3,593 reviews
China Airlines
8.3
Very Good
747 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.3

Boarding

8.3

Crew

8.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

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.

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

    According to our current data, Air Canada ($1,473), United Airlines ($1,696), and Air New Zealand ($1,704) offers the cheapest pricing from Adelaide to Seattle. These flights start at 27% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Adelaide to Seattle one-way?

    The cheapet airlines for a one-way flight from Adelaide to Seattle are American Airlines ($1,044), Qantas Airways ($1,071), and Singapore Airlines ($1,285).

  • 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.

  • What is the cheapest month to book a flight from Adelaide to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Adelaide to Seattle (average of $875). Flying from Adelaide to Seattle in December is currently the most expensive (average of $1,404). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Adelaide?

Book flights to Adelaide if you plan to visit one of these locations
Leavenworth

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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 3 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$1,414Average$1,770FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Qantas AirwaysCheapest$1,449Average$1,868FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Air CanadaCheapest$1,466Average$1,758FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$1,733Average$2,049FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AustraliaCheapest$1,801Average$2,086FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights

Fly with Cheapflights

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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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