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Cheap flights from Seattle to Adelaide from $830

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
18 Jun — 25 Jun1
1 adult

Cheap flight deals from Seattle to Adelaide

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Adelaide (ADL). 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 13 June 2025.

Round-trip from

$1,549

One-way from

$830

Popular in

January

Cheapest in

March

Average price

$1,787
23/6-27/8
  • 23/6-27/8
  • 4 total stops
  • 53h 04m total
  • Seattle to Adelaide
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5/8
  • 5/8
  • 2 total stops
  • 37h 05m total
  • Seattle to Adelaide
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($758 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease ($161 potential savings vs. average return price).
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Average for round-trip flights in June 2025
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Find flight deals from Seattle to Adelaide

Cheapest flights from Seattle to Adelaide
Explore the most affordable flight options available from Seattle to Adelaide. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Mon 23/614:40SEA - ADL
2 stops28h 10mMultiple Airlines
Wed 27/812:00ADL - SEA
2 stops24h 54mMultiple Airlines
Deal found 12/6$1,549
Thu 7/817:55SEA - ADL
2 stops29h 50mQantas Airways
Thu 28/806:00ADL - SEA
2 stops32h 03mQantas Airways
Deal found 11/6$1,593
Wed 19/1101:33SEA - ADL
2 stops39h 12mAmerican Airlines
Mon 9/207:55ADL - SEA
2 stops47h 20mAmerican Airlines
Deal found 12/6$1,905
Fri 8/817:14SEA - ADL
2 stops24h 21mUnited Airlines
Wed 27/820:00ADL - SEA
3 stops41h 24mUnited Airlines
Deal found 12/6$1,956
Sat 5/708:15SEA - ADL
2 stops32h 10mHawaiian Airlines
Thu 31/716:30ADL - SEA
2 stops21h 40mHawaiian Airlines
Deal found 12/6$2,011
Sun 27/706:45SEA - ADL
3 stops47h 20mAir New Zealand
Sun 3/811:55ADL - SEA
2 stops26h 51mAir New Zealand
Deal found 12/6$2,068
Thu 10/716:30SEA - ADL
2 stops52h 55mANA
Tue 26/816:30ADL - SEA
2 stops38h 25mANA
Deal found 12/6$2,140
Sat 5/718:59SEA - ADL
2 stops24h 06mFiji Airways
Thu 31/712:35ADL - SEA
2 stops22h 49mFiji Airways
Deal found 12/6$2,191
Thu 20/1108:45SEA - ADL
1 stop38h 05mSingapore Airlines
Sun 8/218:35ADL - SEA
1 stop55h 05mSingapore Airlines
Deal found 12/6$2,442
Fri 8/816:30SEA - ADL
1 stop30h 50mQatar Airways
Wed 27/821:40ADL - SEA
1 stop31h 35mQatar Airways
Deal found 12/6$3,514

Cheapflights Fare Finder

Customise your flight search to find flights from Seattle to Adelaide 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 13 June 2025.
Use the filters below to find and compare flights from Seattle to Adelaide that are best for you.

Fly from

Seattle

Fly to

Adelaide

Route

Depart

Return

Price

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 23/6

14:40-11:20

2 stops28h 10m

Adelaide

Wed 27/8

12:00-20:24

2 stops24h 54m

$1,549

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 7/8

17:55-16:15

2 stops29h 50m

Adelaide

Thu 28/8

06:00-21:33

2 stops32h 03m

$1,593

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 5/7

08:15-08:55

2 stops32h 10m

Adelaide

Thu 31/7

16:30-21:40

2 stops21h 40m

$1,891

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 19/11

01:33-11:15

2 stops39h 12m

Adelaide

Sat 7/2

07:55-21:19

2 stops31h 54m

$1,905

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Wed 24/9

17:14-10:05

2 stops24h 21m

Adelaide

Mon 6/10

06:00-21:15

3 stops32h 45m

$1,956

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 27/7

06:45-22:35

3 stops47h 20m

Adelaide

Sun 3/8

11:55-22:16

2 stops26h 51m

$2,068

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 5/7

16:30-13:55

2 stops52h 55m

Adelaide

Tue 26/8

16:30-14:25

2 stops38h 25m

$2,140

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sat 5/7

18:59-11:35

2 stops24h 06m

Adelaide

Thu 31/7

12:35-18:54

2 stops22h 49m

$2,191

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Thu 20/11

08:45-17:20

1 stop38h 05m

Adelaide

Sun 8/2

18:35-07:10

1 stop55h 05m

$2,442

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Fri 8/8

16:30-15:50

1 stop30h 50m

Adelaide

Wed 27/8

21:40-12:45

1 stop31h 35m

$3,514

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Showing 1-10 of 15 results
1
2

Best time to book a flight from Seattle to Adelaide

Have a flexible travel schedule? Discover the best time to fly to Adelaide from Seattle 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 Seattle to Adelaide

Rainfall in Adelaide by month

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

In terms of precipitation, rainfall in Adelaide ranges from 10.0 - 60.0 inches per month. July is typically the wettest month, when rainfall can reach 60.0 mm. January is typically the driest time to visit Adelaide when rainfall is around 10.0 mm.

Temperature in Adelaide by month

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

If weather is an important factor for your trip to Adelaide, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Adelaide

Get insights into the airlines that provide service to Adelaide. 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 Adelaide. Reviews last updated 13 June 2025.
ANA
8.3
Very Good
882 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.9

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
ANA
8.3
Very Good
882 reviews
ANA
8.3
Very Good
882 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.9

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Fiji Airways
8.1
Very Good
194 reviews
ANA
8.3
Very Good
882 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.9

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Singapore Airlines
8.1
Very Good
1,302 reviews
ANA
8.3
Very Good
882 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.9

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Air New Zealand
8.0
Very Good
483 reviews
ANA
8.3
Very Good
882 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.9

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Hawaiian Airlines
7.9
Good
2,494 reviews
ANA
8.3
Very Good
882 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.9

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Adelaide. 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 Seattle to Adelaide round-trip?

    Our cheapest airline available from Seattle to Adelaide is Qantas Airways. Our recent data shows that you can find tickets from as low as $1,593 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $1,905 and $1,956 round-trip. Qantas Airways is 30% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for Qantas Airways. According to our data, you can fly for as low as $881. Users have also found prices from $1,022 and $1,936 on United Airlines and Singapore Airlines, respectively.

  • Can I find deals for flights from Seattle to Adelaide that include hotel bookings?

    Yes. In addition to deals on Seattle to Adelaide flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Adelaide?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Adelaide.

  • Can I find deals for business class flights from Seattle to Adelaide?

    Yes. Cheapflights offers flight deals from Seattle to Adelaide 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 Seattle to Adelaide?

    Currently, June is the cheapest month in which you can book a flight from Seattle to Adelaide (average of $168). Flying from Seattle to Adelaide in October is currently the most expensive (average of $241). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Glenelg
Stirling

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Yes, Cheapflights offers price alerts on Seattle to Adelaide flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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