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Cheap flights from Adelaide to Seattle from $1,473

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 21/6. Fares are subject to change and may not be available on all flights or dates of travel.
ADL — SEA
31 Mar — 7 Apr1
1 adult

Cheapflights Tip: The best prices from Adelaide to Seattle/Tacoma Intl are usually found in November or October, 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 26 March 2025.

Round-trip from

$1,740

One-way from

$1,473

Popular in

December

Cheapest in

November

Average price

$1,898
Qantas Airways
  • Qantas Airways
  • 24/5-3/6
  • 5 total stops
  • 51h 57m total
  • Adelaide to Seattle
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21/6
  • 21/6
  • 3 total stops
  • 58h 52m total
  • Adelaide to Seattle
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($371 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease ($112 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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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 26 March 2025.

Sat 24/508:00ADL - SEA
3 stops27h 02mMultiple Airlines
Tue 3/616:00SEA - ADL
2 stops24h 55mMultiple Airlines
Deal found 25/3$1,740
Fri 9/506:00ADL - SEA
2 stops31h 05mQantas Airways
Fri 16/506:14SEA - ADL
2 stops37h 21mQantas Airways
Deal found 25/3$1,849
Fri 25/717:35ADL - SEA
1 stop31h 40mSingapore Airlines
Fri 15/810:15SEA - ADL
1 stop28h 40mSingapore Airlines
Deal found 24/3$1,973
Fri 25/720:00ADL - SEA
3 stops41h 26mUnited Airlines
Fri 15/817:14SEA - ADL
2 stops25h 21mUnited Airlines
Deal found 24/3$2,206
Fri 9/521:40ADL - SEA
1 stop31h 35mQatar Airways
Fri 16/516:30SEA - ADL
2 stops45h 40mQatar Airways
Deal found 25/3$2,868

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 26 March 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

Sat 24/5

08:00-18:32

3 stops27h 02m

Seattle/Tacoma Intl

Tue 3/6

16:00-09:25

2 stops24h 55m

$1,740

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 9/5

06:00-20:35

2 stops31h 05m

Seattle/Tacoma Intl

Fri 16/5

06:14-12:05

2 stops37h 21m

$1,849

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 25/7

17:35-08:45

1 stop31h 40m

Seattle/Tacoma Intl

Fri 15/8

10:15-07:25

1 stop28h 40m

$1,973

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 25/7

20:00-20:56

3 stops41h 26m

Seattle/Tacoma Intl

Fri 15/8

17:14-11:05

2 stops25h 21m

$2,206

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Fri 9/5

21:40-12:45

1 stop31h 35m

Seattle/Tacoma Intl

Fri 16/5

16:30-06:40

2 stops45h 40m

$2,868

AdelaideSeattle

ADL - SEA

ADLSEA

Adelaide

Sat 21/6

17:15-11:37

3 stops58h 52m

$1,473

Flights are sorted by cheapest return flights first.

Deals found on 25/3

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 21 March 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 $1,482). 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 26 March 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.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 26 March 2025.
Singapore Airlines
8.1
Very Good
1,284 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Singapore Airlines
8.1
Very Good
1,284 reviews
Singapore Airlines
8.1
Very Good
1,284 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Qantas Airways
7.5
Good
811 reviews
Singapore Airlines
8.1
Very Good
1,284 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
Qatar Airways
7.4
Good
3,539 reviews
Singapore Airlines
8.1
Very Good
1,284 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.
United Airlines
7.4
Good
8,608 reviews
Singapore Airlines
8.1
Very Good
1,284 reviews
Check prices

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Food

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

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, Qantas Airways ($1,849), Singapore Airlines ($2,425), and United Airlines ($2,494) offers the cheapest pricing from Adelaide to Seattle. These flights start at 11% 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.

  • 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 $1,482). 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 7 airlines flying from Adelaide to Seattle

Discover the top 7 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 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,002Average$1,851FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AustraliaCheapest$1,044Average$2,340FlexibilityNo cancel feeOn-time80%
Search Virgin Australia flights
Qantas AirwaysCheapest$1,413Average$2,199FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights
Singapore AirlinesCheapest$1,514Average$1,764FlexibilityNo cancel feeOn-time81%
Search Singapore Airlines flights
Air CanadaCheapest$1,529Average$1,872FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Hawaiian AirlinesCheapest$1,743Average$2,312FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
Qatar AirwaysCheapest$2,464Average$2,665FlexibilityNo cancel feeOn-time68%
Search Qatar Airways 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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