SEA - ADL

$476 Find Cheap Flights from Seattle to Adelaide

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Adelaide departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Adelaide

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Adelaide, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Adelaide, as well as popular online travel agencies
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Flight Deals
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Flight Deals

Cheap Flights from Seattle to Adelaide (SEA-ADL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Adelaide that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Adelaide

Mon, Sep 1 - Mon, Sep 8
 Logo
2:32 pm - 10:00 pmSEA-ADL
38h 58m2 stops
 Logo
9:15 am - 9:36 pmADL-SEA
28h 51m2 stops
$1,077
Find Deal
Mon, Sep 1 - Mon, Sep 8
 Logo
8:45 pm - 11:35 amSEA-ADL
46h 20m3 stops
 Logo
12:35 pm - 6:25 pmADL-SEA
22h 20m2 stops
$1,391
Find Deal
Thu, Dec 25 - Sun, Jan 11
United Airlines Logo
1:55 pm - 9:30 amSEA-ADL
25h 05m2 stops
United Airlines Logo
6:10 am - 1:16 pmADL-SEA
25h 36m2 stops
$1,515United Airlines
Find Deal
Mon, Sep 1 - Mon, Sep 8
Qatar Airways Logo
4:30 pm - 3:50 pmSEA-ADL
30h 50m1 stop
Qatar Airways Logo
6:20 pm - 12:45 pmADL-SEA
34h 55m2 stops
$1,551Qatar Airways
Find Deal
Sun, Aug 31 - Mon, Sep 8
 Logo
2:10 am - 6:15 amSEA-ADL
35h 35m2 stops
 Logo
8:00 pm - 9:22 amADL-SEA
29h 52m2 stops
$1,684
Find Deal
Thu, Dec 25 - Sun, Jan 11
United Airlines Logo
5:59 pm - 2:10 pmSEA-ADL
25h 41m2 stops
United Airlines Logo
6:00 am - 1:16 pmADL-SEA
25h 46m3 stops
$1,957United Airlines
Find Deal
Sun, Aug 31 - Mon, Sep 8
 Logo
2:10 am - 6:15 amSEA-ADL
35h 35m2 stops
 Logo
7:00 pm - 12:30 pmADL-SEA
34h 00m3 stops
$2,096
Find Deal
Mon, Sep 1 - Mon, Sep 8
Qatar Airways Logo
4:30 pm - 3:50 pmSEA-ADL
30h 50m1 stop
Qatar Airways Logo
9:40 pm - 12:45 pmADL-SEA
31h 35m1 stop
$2,225Qatar Airways
Find Deal
Mon, Jan 19 - Mon, Feb 2
Air New Zealand Logo
6:30 am - 10:55 amSEA-ADL
33h 55m2 stops
Air New Zealand Logo
11:55 am - 7:16 pmADL-SEA
25h 51m2 stops
$6,262Air New Zealand
Find Deal
Mon, Jan 19 - Mon, Feb 2
Singapore Airlines Logo
6:55 am - 8:50 amSEA-ADL
55h 25m3 stops
Singapore Airlines Logo
6:35 pm - 7:25 pmADL-SEA
43h 20m3 stops
$19,958Singapore Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Adelaide flights

Get data-powered insights and trends into flights from Seattle to Adelaide to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to Adelaide?

The average price of all round-trip flights from Seattle to Adelaide clicked on KAYAK for each day over the last 12 months.

When flying from Seattle to Adelaide, you should consider leaving on a Wednesday and avoid Fridays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Tuesdays and the most expensive ones on Wednesdays.

Good to know

Low seasonNovember
Cheapest flight$476
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Seattle to Adelaide

When to book flights from Seattle to Adelaide

Are your dates flexible? Find out the best times to travel from Seattle to Adelaide based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Adelaide

  • What is the cheapest flight from Seattle to Adelaide?

    In the last 3 days, the lowest price for a flight from Seattle to Adelaide was $476 for a one-way ticket and $1,077 for a round-trip.

  • Do I need a passport to fly between Seattle and Adelaide?

    Yes

  • Which aircraft models fly most regularly from Seattle to Adelaide?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Adelaide?

    Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Adelaide, with Star Alliance being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Seattle to Adelaide?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Adelaide.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Adelaide?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Adelaide from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Adelaide?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Adelaide with an airline and back to Seattle with another airline. Booking your flights between Seattle and ADL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Adelaide?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Adelaide from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Seattle to Adelaide

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Adelaide. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Adelaide? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Qantas AirwaysOverall score based on 887 reviews
7.7Boarding
6.9Food
8.2Crew
7.2Entertainment
7.4Comfort
Airline reviews

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

8.0 ExcellentMarcus, Jul 2025SYD - ADL
Read more Qantas Airways reviews

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

The wifi was out. Otherwise it was great flight. Richard, as CSM, was excellent.

Was bumped to a later flight because of inefficiency on part of the airline.

The Emerits/Qantas flight was cancelled to Wellington. We need a refund. Had to buy another airline ticket. How do we get the refund. Still not in Wellington.

Delayed QF59 flight once again, Qantas doesn't fail in maintaining there delayed departures and arrivals. USB points do not work nor do the power point sockets on the plane, Qantas staff admitted that on the flight. Don't expect to your charge devices. Saving grace, was the ice cream. Bottom line, if you expect to fly to HND and make it on time avoid Qantas and if you're interested in ice cream - visit 7/11.

Pretty excellent. I don’t know what the pilot could have done better with the bumping ( there was a storm) nor what happened to my ears coming down into bendigo. It doesn’t happen coming down into Sydney just the return flight. I wonder why?

Loved the staff. The economy seats could have been bigger.

Airport and crew experience was excellent. We had to queue for the runway - no one’s fault, but it did mean we were 30 minutes late leaving

Everything you need to know for your flight from Seattle to Adelaide

Information on your arrival and departure airports

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