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Cheap flights from Seattle to Adelaide from $1,126

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ADL
23 Apr — 30 Apr1
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 18 April 2025.

Round-trip from

$1,925

One-way from

$1,126

Popular in

January

Cheapest in

March

Average price

$2,465
3/5-10/5
  • 3/5-10/5
  • 4 total stops
  • 51h 22m total
  • Seattle to Adelaide
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20/5
  • 20/5
  • 3 total stops
  • 47h 05m total
  • Seattle to Adelaide
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($843 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($157 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 18 April 2025.

Sat 3/516:20SEA - ADL
2 stops26h 45mMultiple Airlines
Sat 10/512:35ADL - SEA
2 stops24h 37mMultiple Airlines
Deal found 18/4$1,925
Sun 9/1119:05SEA - ADL
2 stops29h 35mAir Canada
Sun 16/1106:10ADL - SEA
2 stops22h 10mAir Canada
Deal found 17/4$1,991
Sun 1/621:27SEA - ADL
3 stops42h 58mHawaiian Airlines
Sun 8/614:30ADL - SEA
2 stops25h 33mHawaiian Airlines
Deal found 17/4$2,231
Sun 9/1109:40SEA - ADL
3 stops32h 05mAir New Zealand
Sun 16/1106:00ADL - SEA
2 stops25h 45mAir New Zealand
Deal found 17/4$2,473
Tue 9/1207:03SEA - ADL
2 stops33h 22mUnited Airlines
Tue 30/1206:00ADL - SEA
2 stops31h 42mUnited Airlines
Deal found 17/4$2,606
Sun 9/1108:45SEA - ADL
1 stop29h 50mSingapore Airlines
Sun 16/1118:35ADL - SEA
1 stop55h 05mSingapore Airlines
Deal found 17/4$2,645
Sat 19/406:08SEA - ADL
2 stops37h 27mQantas Airways
Wed 23/419:15ADL - SEA
2 stops44h 04mQantas Airways
Deal found 17/4$2,656
Sun 1/616:30SEA - ADL
1 stop30h 50mQatar Airways
Sun 8/618:20ADL - SEA
2 stops34h 55mQatar Airways
Deal found 17/4$3,143
Sun 1/617:15SEA - ADL
1 stop34h 20mEmirates
Sun 8/621:50ADL - SEA
1 stop32h 05mEmirates
Deal found 17/4$4,602

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 18 April 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

Sat 3/5

16:20-11:35

2 stops26h 45m

Adelaide

Sat 10/5

12:35-20:42

2 stops24h 37m

$1,925

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 1/6

21:27-08:55

3 stops42h 58m

Adelaide

Sun 8/6

14:30-23:33

2 stops25h 33m

$2,231

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 1/6

19:15-11:50

2 stops24h 05m

Adelaide

Sun 8/6

18:50-12:58

2 stops34h 38m

$2,419

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Mon 2/6

17:14-18:20

2 stops32h 36m

Adelaide

Mon 9/6

06:00-21:58

3 stops32h 28m

$2,738

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 1/6

17:35-11:05

2 stops25h 00m

Adelaide

Sun 8/6

06:05-21:08

3 stops31h 33m

$2,846

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 1/6

16:30-15:50

1 stop30h 50m

Adelaide

Sun 8/6

18:20-12:45

2 stops34h 55m

$3,143

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 1/6

10:15-07:25

1 stop28h 40m

Adelaide

Sun 8/6

17:35-08:45

1 stop55h 40m

$3,559

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 1/6

17:15-20:05

1 stop34h 20m

Adelaide

Sun 8/6

21:50-13:25

1 stop32h 05m

$4,602

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Tue 20/5

16:20-07:55

3 stops47h 05m

$1,126

SeattleAdelaide

SEA - ADL

SEAADL

Seattle/Tacoma Intl

Sun 1/6

14:55-11:50

2 stops28h 25m

$1,309

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 12 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

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.

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 18 April 2025.
Singapore Airlines
8.1
Very Good
1,289 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Singapore Airlines
8.1
Very Good
1,289 reviews
Singapore Airlines
8.1
Very Good
1,289 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Emirates
8.0
Very Good
3,200 reviews
Singapore Airlines
8.1
Very Good
1,289 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Air New Zealand
8.0
Very Good
467 reviews
Singapore Airlines
8.1
Very Good
1,289 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Hawaiian Airlines
7.9
Good
2,385 reviews
Singapore Airlines
8.1
Very Good
1,289 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Qatar Airways
7.4
Good
3,554 reviews
Singapore Airlines
8.1
Very Good
1,289 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Crew

8.6

Overall

8.1

Food

7.7

Boarding

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

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 Hawaiian Airlines. Our recent data shows that you can find tickets from as low as $2,231 on this airline. Additional options worth looking into are Air Canada and Air New Zealand, starting at $2,419 and $2,738 round-trip. Hawaiian Airlines is 3% 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 Air Canada. According to our data, you can fly for as low as $1,309. Users have also found prices from $2,198 and $5,399 on Qatar Airways and American 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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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Adelaide.

Can Cheapflights find flights from Seattle to Adelaide with no change fees?

Yes, we can. To see specific flights from Seattle to Adelaide with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Adelaide become cheaper?

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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