ADL - SEA

$1,507 Find Cheap Flights from Adelaide to Seattle

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Adelaide to Seattle departing on 16/10. 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.
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KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Adelaide to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Adelaide to Seattle.
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Cheap Flight Deals from Adelaide to Seattle (ADL-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Adelaide to Seattle 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.

Recent return flight deals from Adelaide to Seattle

KAYAK's recommended return flight deals from the most popular airlines that fly from Adelaide to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Singapore Airlines Logo
18:35 - 08:45ADL-SEA
31h 40m1 stop
Singapore Airlines Logo
09:45 - 09:05SEA-ADL
29h 50m1 stop
$1,507Singapore Airlines
Find Deal
Thu, 16 Oct - Thu, 30 Oct
Singapore Airlines Logo
18:35 - 08:45ADL-SEA
31h 40m1 stop
Singapore Airlines Logo
06:00 - 09:05SEA-ADL
33h 35m2 stops
$1,627Singapore Airlines
Find Deal
Thu, 16 Oct - Thu, 30 Oct
United Airlines Logo
06:05 - 21:08ADL-SEA
31h 33m3 stops
United Airlines Logo
05:05 - 11:05SEA-ADL
37h 30m2 stops
$1,746United Airlines
Find Deal
Sun, 8 Jun - Sun, 15 Jun
United Airlines Logo
20:00 - 11:21ADL-SEA
31h 51m2 stops
United Airlines Logo
17:35 - 11:05SEA-ADL
25h 00m2 stops
$1,760United Airlines
Find Deal
Mon, 9 Jun - Mon, 16 Jun
United Airlines Logo
06:05 - 00:59ADL-SEA
35h 24m2 stops
United Airlines Logo
05:10 - 10:55SEA-ADL
37h 15m2 stops
$1,762United Airlines
Find Deal
Mon, 16 Jun - Fri, 25 Jul
Virgin Australia Logo
06:05 - 13:22ADL-SEA
23h 47m2 stops
Virgin Australia Logo
19:27 - 11:05SEA-ADL
23h 08m2 stops
$1,818Virgin Australia
Find Deal
Mon, 26 May - Mon, 16 Jun
Qantas Airways Logo
08:55 - 21:36ADL-SEA
29h 11m2 stops
Qantas Airways Logo
16:00 - 16:15SEA-ADL
31h 45m2 stops
$1,853Qantas Airways
Find Deal
Sat, 24 May - Tue, 3 Jun
 Logo
13:35 - 00:11ADL-SEA
28h 06m2 stops
 Logo
17:40 - 12:15SEA-ADL
25h 05m2 stops
$1,865
Find Deal
Thu, 16 Oct - Thu, 30 Oct
Qantas Airways Logo
19:30 - 22:47ADL-SEA
43h 47m2 stops
Qantas Airways Logo
18:52 - 12:05SEA-ADL
24h 43m2 stops
$2,375Qantas Airways
Find Deal
Thu, 22 May - Thu, 5 Jun
 Logo
12:35 - 17:58ADL-SEA
21h 53m2 stops
 Logo
18:52 - 19:20SEA-ADL
31h 58m2 stops
$2,447
Find Deal
Mon, 5 May - Wed, 11 Jun

KAYAK's insights & trends for Adelaide to Seattle flights

Get data-powered insights and trends into flights from Adelaide to Seattle 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 Adelaide to Seattle?

The average price of all round-trip flights from Adelaide to Seattle clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Seattle on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Adelaide to Seattle. For your return ticket, we recommend flying on a Monday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Adelaide to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Adelaide to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Adelaide to Seattle is November, where tickets cost $1,568 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $2,734 and $2,586 respectively.

How far in advance should I book a flight from Adelaide to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Adelaide to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from Adelaide to Seattle, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low season

January

High season

July

Cheapest flight

$1,507
Best time to beat the crowds but there is an average 17% increase in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Adelaide to Seattle

When to book flights from Adelaide to Seattle

Are your dates flexible? Find out the best times to travel from Adelaide to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 Adelaide to Seattle

  • What is the cheapest flight from Adelaide to Seattle?

    In the last 3 days, the lowest price for a flight from Adelaide to Seattle was $2,751 for a one-way ticket and $964 for a return.

  • Which airports will I be using when flying from Adelaide to Seattle?

    When flying out of Adelaide you will be using Adelaide. You will be landing at Seattle, also known as Seattle/Tacoma Intl.

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

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

  • Which airline alliances offer flights from Adelaide to Seattle?

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

  • Which is the best airline for flights from Adelaide to Seattle, Singapore Airlines or Virgin Australia?

    The two airlines most popular with KAYAK users for flights from Adelaide to Seattle are Singapore Airlines and Virgin Australia. With an average price for the route of $1,819 and an overall rating of 8.1, Singapore Airlines is the most popular choice. Virgin Australia is also a great choice for the route, with an average price of $2,192 and an overall rating of 7.5.

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

    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 Adelaide to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Adelaide 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 Adelaide to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Seattle with an airline and back to Adelaide with another airline.

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

    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 Seattle from Adelaide up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Adelaide to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Adelaide to Seattle. 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 Adelaide to Seattle? 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.
8.1
Singapore AirlinesOverall score based on 1290 reviews
7.9Comfort
8.2Boarding
8.6Crew
8.0Entertainment
7.7Food
Airline reviews

Horrendous. We upgraded and they took the money but cancelled one of our tickets. The recline action didn’t work on the seats for the flight from Singapore to London, pre booked meals but they seemed to have disappeared as well.. Phone customer service was horrendous. Took 5 phone calls and no fix. Craig at the airport was the only one who seemed to be able to get the ticket back.

2.0 MediocreKylie, Apr 2025CNS - SIN
Read more Singapore Airlines reviews

Horrendous. We upgraded and they took the money but cancelled one of our tickets. The recline action didn’t work on the seats for the flight from Singapore to London, pre booked meals but they seemed to have disappeared as well.. Phone customer service was horrendous. Took 5 phone calls and no fix. Craig at the airport was the only one who seemed to be able to get the ticket back.

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

So happy I flew with Singapore Airlines. The customer service is top notch. I am terrified of flying and the staff made me feel so at ease. Will only fly Singapore internationally moving forward.

Food could have been better. Too many passengers getting up and down all the time.

Delayed 1hour due to storm still didn't get window seat for third flight despite paying £240 extra to book them

Flight from SFO did not include entertainment as it was not working the entire duration of the flight. Was informed that there would be a $350 voucher for the inconvenience. Uncertain how the voucher will be provided.

It was an average flight. I would have expected more from this airline. Food, seats, service, etc was just average. I just give them some extra points for offering free WiFi on board with just a Krisflyer account.

Check in was easy through self-check-in kiosks just like domestic flights. Staff onboard were fantastic. Some "book the cook" good options weren't great, others really good. Entertainment options a bit limited to what I've experienced on Qantas. Overall a good flight though, especially for the price.

I very much liked and appreciated the service on board. The seating arrangement in Business feels uncomfortable. It's not made for tall people, in any case.

Touch screens were very difficult to use, generally being laggy and unresponsive- it was quite an art to get it to play the thing you wanted rather than some thing at random. Selection of films and Tv was good when touchscreen decided to finally respond.

Their aircraft are old and amenities lack way behind other international carriers leaving from BNE. Even in economy

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

Overall good experience with flight and airport wheelchair staff. Also got Indian food in the flights

Friendly staff, surprisingly good premium economy seats allowing good sleep/ snooze opportunity and very good menu.

Very good as always, stand out airline. The passengers whom choose to stuff baggage that otherwise should be checked-in is a real bother but that's not the airlines doing. A real frustration that passengers just don't want to check-in luggage. This is a pet hate unfortunately.

It’s a two prop flight so I had problems with my ears on re- entering ! But otherwise fine

I love flying with Qantas. There was no onscreen entertaining on this flight, and only a snack provided (not a meal) but still better than Jetstar or Virgin (in my opinion) so still happy.

Complaint is with American Airlines which delayed our flight from salt lake to Dallas reaulting in us missing our connection to Brisbane. Had to spend 24 hours in Dallas to wait for the next flight. Awful experience and ruined my wife’s birthday.

Wheelchair assistance to move through the terminals and to/from the plane door was excellent. No vegan snack on the flight, only something with salami and cheese in it.

Gluten free options less explicit on business class, but great service

Very good… seems the virgin staff particularly in the lounge and in flight exceeded expectations.

I liked everything about the experience but would have liked some free snacks!

Crew was great but flight was delayed almost three hours due to a technical issue and we had to go back to the terminal and wait for another one.

Being told why we delayed three hours and not even given an apology by someone. Not a word. Not my airline of choice ever.

Checked Baggage line up was long but moved quickly, rest of the process, boarding, crew was excellent

Virgin has always provided a smooth and comfortable flight. This one was no different. Seats are comfortable. Staff are great. This is my favourite airline.

Virgin changed the flight to an Alliance flight. Smaller plane, tea coffee and water the only refreshments available and not sure what happened to the extra money I paid to sit in a selected seat with extra leg room. This is obviously a regular switch as it happened on our flight there and back. Do not recommend.

Late boarding, late departure due to weather and slow boarding, packed 5+hour flight, only 2 toilets for main cabin, tight leg room, no free food except tea, coffee, and water, arrived 75 minutes late.

Cramped, crowded flight, with no complimentary food except coffee, tea, or water.

A bit rush for transit. Food and entertainment are not available

So far so good but food and entertainment are not available for this flight

Multiple delays and not straight answer from the United team

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

leg space better than expected. two washrooms for one plane isn't enough.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

My flight was overbooked and they would not let me board. I had to book another flight and pay the full amount of that flight. I did not get any help at all from Air Canada or United Airlines.

Comfortable seats and movies entertainment available. Better experience than the flight from Toronto to Denver.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

There is not enough space between two chairs and raws.

Everything was made rather simple, so I appreciate that. All the people I dealt with from entering the airport in Jacksonville to my lonnnnnnng walk to my next gate in Chicago were excellent and very helpful.

Crammed in like cattle waited 30 mins for late connecting flight (flight didn’t wait for me for me when I missed my connection at 2 different airports on outward journey)

Terrible. 3 missed flights and 24 hours delayed with lost bag and promised $100 compensation from United and absolutely nothing from them…

It was a lovely flight. Very attentive crew, comfortable seats, good food and entertainment. Highly recommended. Only difficulty was with their app.

Terrible. Flight was delayed for hours and we ended up arriving at our home at 4am after 20+ hours flying.

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

Information on your arrival and departure airports

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