SEA - ADL

$608 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 1/24. 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, 0 bags

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$1,182
Air Canada
Sun 3/15Thu 3/19
SEA - ADL • 2 stops
Cheapest one-way
$608
Multiple Airlines
Sat 1/24
SEA - ADL • 2 stops
Top airlines
Air Canada
Cheapest • from $1,182 (round-trip)
Qantas Airways
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Adelaide!
Flight Deals
Booking Insights
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

Sun, Mar 15 - Thu, Mar 19
Air Canada Logo
8:00 pm - 1:55 pmSEA-ADL
24h 25m2 stops
Air Canada Logo
6:10 am - 10:06 pmADL-SEA
33h 26m2 stops
$1,182Air Canada
Find Deal
Sun, Mar 15 - Thu, Mar 19
Air Canada Logo
8:00 pm - 1:55 pmSEA-ADL
24h 25m2 stops
Air Canada Logo
6:10 am - 9:31 amADL-SEA
20h 51m2 stops
$1,183Air Canada
Find Deal
Sun, Nov 16 - Thu, Nov 20
Qantas Airways Logo
6:20 am - 8:55 pmSEA-ADL
44h 05m2 stops
Qantas Airways Logo
8:00 pm - 6:11 pmADL-SEA
40h 41m2 stops
$1,669Qantas Airways
Find Deal
Sun, Nov 16 - Thu, Nov 20
United Airlines Logo
7:28 pm - 2:10 pmSEA-ADL
24h 12m2 stops
United Airlines Logo
6:00 am - 6:10 pmADL-SEA
30h 40m3 stops
$1,711United Airlines
Find Deal
Mon, Nov 17 - Thu, Nov 20
United Airlines Logo
7:10 am - 10:55 amSEA-ADL
33h 15m2 stops
United Airlines Logo
6:10 am - 12:18 pmADL-SEA
24h 38m2 stops
$1,715United Airlines
Find Deal
Sun, Mar 15 - Thu, Mar 19
Singapore Airlines Logo
9:45 am - 8:50 amSEA-ADL
29h 35m1 stop
Singapore Airlines Logo
6:35 pm - 8:10 amADL-SEA
31h 05m1 stop
$1,834Singapore Airlines
Find Deal
Tue, Nov 18 - Thu, Nov 20
Qantas Airways Logo
6:05 am - 1:00 pmSEA-ADL
36h 25m2 stops
Qantas Airways Logo
8:55 pm - 8:23 pmADL-SEA
41h 58m2 stops
$1,859Qantas Airways
Find Deal
Mon, Nov 17 - Thu, Nov 20
Qatar Airways Logo
4:05 pm - 5:05 pmSEA-ADL
30h 30m1 stop
Qatar Airways Logo
12:35 pm - 11:40 amADL-SEA
41h 35m2 stops
$1,925Qatar Airways
Find Deal
Tue, Nov 18 - Thu, Nov 20
Singapore Airlines Logo
8:45 am - 8:50 amSEA-ADL
29h 35m1 stop
Singapore Airlines Logo
6:35 pm - 7:10 amADL-SEA
31h 05m1 stop
$3,468Singapore Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26
Qatar Airways Logo
4:05 pm - 5:05 pmSEA-ADL
30h 30m1 stop
Qatar Airways Logo
10:00 pm - 11:40 amADL-SEA
32h 10m1 stop
$3,481Qatar Airways
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 seasonSeptember
Cheapest flight$608
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly and prices are also 11% 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 $608 for a one-way ticket and $1,182 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?

    oneworld is the only airline alliance operating flights between Seattle and Adelaide.

  • 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 927 reviews
7.7Boarding
7.5Comfort
8.2Crew
7.0Food
7.2Entertainment
Airline reviews

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

2.0 MediocreR, Oct 2025WLG - BNE
Read more Qantas Airways reviews

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

A few more inches of legroom is all i ask

One of the best Qantas business flights I've had. Quality product

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.

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

Information on your arrival and departure airports