ADL - SEA

$1,408 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 11/3. 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 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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Flight Deals

Cheap Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Adelaide to Seattle

Wed, 11 Mar - Sun, 15 Mar
United Airlines Logo
13:55 - 15:05ADL-SEA
18h 40m1 stop
United Airlines Logo
19:10 - 08:30SEA-ADL
43h 50m2 stops
$1,408United Airlines
Find Deal
Wed, 11 Mar - Sun, 15 Mar
United Airlines Logo
13:55 - 15:05ADL-SEA
18h 40m1 stop
United Airlines Logo
19:10 - 08:30SEA-ADL
43h 50m2 stops
$1,409United Airlines
Find Deal
Tue, 28 Oct - Thu, 20 Nov
 Logo
06:10 - 09:31ADL-SEA
20h 51m2 stops
 Logo
20:00 - 16:20SEA-ADL
25h 50m2 stops
$1,430
Find Deal
Sun, 12 Oct - Sun, 19 Oct
 Logo
22:10 - 22:31ADL-SEA
41h 51m2 stops
 Logo
05:30 - 10:15SEA-ADL
59h 15m2 stops
$1,433
Find Deal
Wed, 29 Oct - Wed, 5 Nov
 Logo
07:50 - 15:37ADL-SEA
25h 17m3 stops
 Logo
14:59 - 09:50SEA-ADL
24h 21m2 stops
$1,469
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Qantas Airways Logo
07:50 - 14:48ADL-SEA
24h 28m2 stops
Qantas Airways Logo
16:30 - 13:40SEA-ADL
26h 40m2 stops
$1,474Qantas Airways
Find Deal
Wed, 11 Mar - Sun, 15 Mar
Air Canada Logo
06:10 - 09:31ADL-SEA
20h 51m2 stops
Air Canada Logo
10:05 - 13:55SEA-ADL
34h 20m2 stops
$1,507Air Canada
Find Deal
Wed, 11 Mar - Sun, 15 Mar
Singapore Airlines Logo
10:15 - 08:10ADL-SEA
39h 25m1 stop
Singapore Airlines Logo
09:45 - 08:50SEA-ADL
29h 35m1 stop
$1,916Singapore Airlines
Find Deal
Wed, 11 Mar - Sun, 15 Mar
Singapore Airlines Logo
10:15 - 08:10ADL-SEA
39h 25m1 stop
Singapore Airlines Logo
09:45 - 08:50SEA-ADL
29h 35m1 stop
$1,918Singapore Airlines
Find Deal
Tue, 16 Dec - Fri, 16 Jan
Qantas Airways Logo
06:35 - 18:55ADL-SEA
30h 50m2 stops
Qantas Airways Logo
06:02 - 11:50SEA-ADL
35h 18m2 stops
$2,415Qantas Airways
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $1,408 (return)
Singapore Airlines
Best reviews • 8.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
November
Cheapest • 26% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
$1,408
Overall average: $1,792
United Airlines
Wed 11/3Sun 15/3
ADL - SEA • 1 stop
Cheapest one-way flight
Multiple Airlines
Mon 15/9
ADL - SEA • multi-stop
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Booking Insights

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 $1,447 (return) on average. On the other hand, the most expensive months are October and December, where the average cost of round-trip tickets is $2,665 and $2,584 respectively.

Good to know

Low seasonOctober
Cheapest flight$1,408
Best time to beat the crowds but there is an average 37% increase in price.
Most popular time to fly and prices are also 4% 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 $938 for a return ticket.

  • 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?

    Star Alliance, oneworld, and SkyTeam 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 Air New Zealand?

    The two airlines most popular with KAYAK users for flights from Adelaide to Seattle are Singapore Airlines and Air New Zealand. With an average price for the route of $1,646 and an overall rating of 8.1, Singapore Airlines is the most popular choice. Air New Zealand is also a great choice for the route, with an average price of $1,521 and an overall rating of 8.0.

  • 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.

Reviews of the top 5 airlines flying 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 1365 reviews
8.6Crew
7.7Food
8.0Comfort
8.0Entertainment
8.2Boarding
Airline reviews

Lounge a access was excellent as was the attentiveness and service from the crew as always. The food and drink supplied were of good quality. The entertainment system had a good selection and I liked the mapping system supplied. However the screen wild have been bigger and the operation a little smoother to navigate. The seats were barely comfortable, but adequate.

8.0 ExcellentAnthony, Aug 2025BNE - SIN
Read more Singapore Airlines reviews

Lounge a access was excellent as was the attentiveness and service from the crew as always. The food and drink supplied were of good quality. The entertainment system had a good selection and I liked the mapping system supplied. However the screen wild have been bigger and the operation a little smoother to navigate. The seats were barely comfortable, but adequate.

The staff on the plane were attentive and friendly. The frustration with the cabin crew was that we were served second to special diet people. And, we were in economy section. The boarding staff was mediocre. Got scolded for requesting to sit with spouse on 14 hours long flight home. Was told they cannot break up families for us. Didn’t understand how we were denied sitting together as we are husband and wife. After many words of exchange, we were accommodated. Cleaning crew did a horrible job! Bathrooms were unsanitary or dirty from beginning of flight! Didn’t expect sparkling as its economy, but did except decent.

Headwind delayed our flight which wasn’t the airlines fault

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

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.

Overall experience was good but what really impressed me the most was the care the flight attendants took of a sick passenger who was sitting in front of me. The flight attendants would come and check on her quite regularly providing her support and comfort. Brilliant service!

Only answered OK and poor as there was no entertainment and I didnt have any food

4.5 hr international flight. We got a glass of water. Ranks up there with Ryan Air, Easy Jet, Spirit and Frontier. Expected better.

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.

My flight from Dallas to Sydney was cancelled. My entire trip was rerouted to include the following: Hartford to Washington DC Washington DC to JFK JFK to Auckland Auckland to Christchurch I paid for an aisle seat on the flight to Auckland and was asked if I would take a window seat to accommodate a family. The agent at the podium failed to mention that the family had a 3 month old baby and that a bassinet would be used during the 16 hour flight. The only way I could get out of my seat was to crawl under the bassinet of the sleeping baby. I think it is wrong that I was no given the choice to sit in another seat, that the agent knew what she was doing and chose to not properly disclose my seating arrangement. Terrible treatment.

they ran out of fruit for breakfast and so I just had a yogurt instead. other than that the flight was good

by the time they got to our row, they were out of some of the food options. games and movies were great but maybe more game options like tetris or pac man would be great

A few more inches of legroom is all i ask

Great as usual, some delays but well communicated and made up for in the air

Poor! This flight was delayed 14 hours. There was no assistance in helping customers find other routes to their destination, nor any other kind of support. It was a chaotic experience. I'm not likely to fly with AA going forward.

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.

We were upgraded and after just a short delay in attending to a safety check we were on our way. Would definately fly Qantas International on their Dreamliner again.

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

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

My flight was delayed about 1 1/2 hours in Chicago, but other then that it was a good flight.

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

I liked the behaviour of the crew members.The flight was good.

1 hour late No hot drinks No restroom in the back of the plane

I swear airplane seats keep getting smaller and smaller but everything else was great. Smooth sailing and we got in early.

No food to provide, they forgot that, in some cases, people stay at the airport for hours without food. Now, to provide them with food, they have to ask them to pay, because some don't have money. That way, they can't eat.

After a long flight from Tokyo, our connecting flight home was canceled due to “maintenance” while we were on our layover in Toronto. Very frustrating to close out our honeymoon, although I’m sure others had it even worse during last week’s strike. Air Canada staff at Pearson Airport are the one thing that kept me remotely at peace during this — they were very helpful and deserve a lot of props. But I would not fly Air Canada again.

I had wonderful wheelchair assistance through the Montreal airport onto the flight. Air Canada was excellent in this both at the Fredericton airport and the Montreal one where an attendant helped us through customs as well as transport and baggage security.

Horrible flight cancelled had to buy another very expensive ticket

Flight was cancelled last minute due to Air Canada strike leaving us stranded and having to stressfully find a way home that cost hundreds of dollars in excess cost added to the trip. Having just experienced our mother's funeral service, this was not a good way to end our trip.

Air Canada marooned me in Canada with no way back home during my summer vacation. I had to buy a last minute flight ticket for over $500 to make it back home. I have their credit card and have flown them for years. Never again.

Flight was cancelled last minute. Had to scramble and purchase a $2000 flight through a separate airlines. Stuck in Toronto two extra days. Missed my first two days on a new job. Had to rent a car for an additional two days. Scrambled to fins a place to live those extra two days. Spent a ton of extra money and lost a lot of money, as well as made a poor impression at work. Difficult difficult difficult

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

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