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Cheap flights from Adelaide to Seattle from $1,527

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/5. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — SEA
8 Jan — 15 Jan1
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 December 2025.

Mon 15/1213:15ADL - SEA
2 stops22h 43mMultiple Airlines
Tue 20/115:57SEA - ADL
2 stops25h 48mMultiple Airlines
Deal found 7/12$1,944
Mon 15/1207:50ADL - SEA
2 stops25h 04mQantas Airways
Sat 17/119:55SEA - ADL
2 stops44h 30mQantas Airways
Deal found 8/12$2,817
Wed 17/1207:50ADL - SEA
2 stops25h 04mQantas Airways
Tue 20/117:53SEA - ADL
2 stops25h 22mQantas Airways
Deal found 8/12$2,844
Tue 16/1218:30ADL - SEA
2 stops38h 24mQantas Airways
Fri 16/119:55SEA - ADL
2 stops44h 30mQantas Airways
Deal found 7/12$2,905
Mon 15/1214:55ADL - SEA
1 stop24h 35mUnited Airlines
Sat 17/109:25SEA - ADL
1 stop29h 35mUnited Airlines
Deal found 7/12$2,987
Mon 15/1214:55ADL - SEA
1 stop28h 25mUnited Airlines
Tue 20/109:00SEA - ADL
2 stops34h 40mUnited Airlines
Deal found 8/12$3,242
Sat 20/1214:55ADL - SEA
1 stop28h 34mUnited Airlines
Sun 11/109:00SEA - ADL
2 stops34h 25mUnited Airlines
Deal found 8/12$3,327
Tue 16/1208:30ADL - SEA
2 stops22h 18mUnited Airlines
Fri 16/112:35SEA - ADL
2 stops30h 50mUnited Airlines
Deal found 8/12$3,337

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 December 2025.

Round-trip from

$1,527

Popular in

April

Cheapest in

November

Average price

$2,118
18/5-26/5
  • 18/5-26/5
  • 4 total stops
  • 48h 43m total
  • Adelaide to Seattle
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($327 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($101 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 December 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

Mon 18/5

12:35-20:35

2 stops24h 30m

Seattle/Tacoma Intl

Tue 26/5

18:52-11:35

2 stops24h 13m

$1,527

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 18/5

17:35-08:45

1 stop31h 40m

Seattle/Tacoma Intl

Tue 26/5

10:15-16:20

1 stop37h 35m

$1,599

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Thu 5/3

13:40-19:58

2 stops24h 48m

Seattle/Tacoma Intl

Mon 9/3

16:50-09:50

2 stops23h 30m

$1,735

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Mon 18/5

06:00-22:49

2 stops33h 19m

Seattle/Tacoma Intl

Mon 25/5

14:40-10:20

2 stops27h 10m

$2,042

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sun 17/5

18:30-22:49

2 stops44h 49m

Seattle/Tacoma Intl

Mon 25/5

14:40-09:25

2 stops26h 15m

$2,053

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sun 17/5

12:40-22:49

2 stops50h 39m

Seattle/Tacoma Intl

Tue 26/5

08:00-09:25

2 stops32h 55m

$2,067

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sun 17/5

12:40-06:00

2 stops33h 50m

Seattle/Tacoma Intl

Wed 27/5

07:35-08:05

2 stops32h 00m

$2,100

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Tue 19/5

06:25-06:00

2 stops40h 05m

Seattle/Tacoma Intl

Mon 25/5

07:35-22:35

2 stops22h 30m

$2,100

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Thu 5/3

06:10-16:14

2 stops28h 34m

Seattle/Tacoma Intl

Mon 9/3

19:35-08:30

1 stop19h 25m

$2,682

Flights are sorted by cheapest return flights first.

Deals found on 8/12

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 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 9 December 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 25% 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 9 December 2025.
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
1,411 reviews
Check prices

Entertainment

8.0

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Singapore Airlines
8.1
Very Good
1,411 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Entertainment

8.0

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Virgin Australia
7.6
Good
426 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Entertainment

8.0

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Qantas Airways
7.5
Good
947 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Entertainment

8.0

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
United Airlines
7.4
Good
9,084 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Entertainment

8.0

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Air Canada
7.1
Good
10,513 reviews
Singapore Airlines
8.1
Very Good
1,411 reviews
Check prices

Entertainment

8.0

Comfort

8.0

Boarding

8.3

Crew

8.6

Food

7.8

Overall

8.1

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

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 and Qantas Airways can get you from Adelaide to Seattle in just under 24h 48m. Your travel time can differ by up to 6h 52m. 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 ($924), Qantas Airways ($1,351), and Singapore Airlines ($1,401) 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 9 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air New ZealandCheapest$924Average$1,528FlexibilityNo cancel feeOn-time78%
Search Air New Zealand flights
Qantas AirwaysCheapest$1,351Average$1,787FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Singapore AirlinesCheapest$1,401Average$1,653FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Air CanadaCheapest$1,452Average$1,617FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AustraliaCheapest$1,705Average$1,955FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights
United AirlinesCheapest$1,717Average$2,019FlexibilityNo 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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