$278 Find Cheap Flights from Seattle to Thailand

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 Thailand departing on 3/13. 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

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Cheap Flights from Seattle to Thailand

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Bangkok
Bangkok1 stop$671
Phuket City
Phuket City1 stop$582
Chiang Mai
Chiang Mai1 stop$752
Ko Samui
Ko Samui2 stops$918
Krabi
Krabi2 stops$870
Bangkok
Bangkok1 stop$671
Phuket City
Phuket City1 stop$582
Chiang Mai
Chiang Mai1 stop$752
Ko Samui
Ko Samui2 stops$918
Krabi
Krabi2 stops$870

Book Cheap Seattle to Thailand Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Thailand 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 Thailand

Thu, Mar 19 - Wed, Mar 25
Singapore Airlines Logo
9:45 am - 5:10 pm
SEA
-
HKT
41h 25m1 stop
Singapore Airlines Logo
10:55 am - 8:10 am
HKT
-
SEA
35h 15m1 stop
$582Singapore Airlines
Tue, Mar 17 - Fri, Mar 27
Hainan Airlines Logo
11:00 am - 2:20 pm
SEA
-
BKK
37h 20m1 stop
Hainan Airlines Logo
1:05 am - 9:00 am
BKK
-
SEA
21h 55m1 stop
$671Hainan Airlines
Fri, Jan 30 - Mon, Feb 9
Singapore Airlines Logo
8:45 am - 8:00 pm
SEA
-
BKK
20h 15m1 stop
Singapore Airlines Logo
9:10 pm - 7:10 am
BKK
-
SEA
25h 00m1 stop
$681Singapore Airlines
Fri, Mar 6 - Tue, Mar 24
Philippine Airlines Logo
9:30 pm - 5:50 pm
SEA
-
BKK
29h 20m1 stop
Philippine Airlines Logo
1:20 pm - 7:40 pm
BKK
-
SEA
20h 20m1 stop
$682Philippine Airlines
Tue, Jan 13 - Mon, Feb 2
China Airlines Logo
12:10 am - 9:50 am
SEA
-
BKK
18h 40m1 stop
China Airlines Logo
5:50 pm - 6:10 pm
BKK
-
SEA
15h 20m1 stop
$692China Airlines
Sat, Feb 28 - Sat, Mar 14
Asiana Airlines Logo
12:10 am - 9:35 pm
SEA
-
HKT
30h 25m1 stop
Asiana Airlines Logo
10:55 pm - 2:55 pm
HKT
-
SEA
30h 00m1 stop
$711Asiana Airlines
Tue, Dec 30 - Sat, Feb 28
Asiana Airlines Logo
12:10 am - 9:35 pm
SEA
-
HKT
30h 25m1 stop
Asiana Airlines Logo
10:55 pm - 1:55 pm
HKT
-
SEA
30h 00m1 stop
$713Asiana Airlines
Mon, Feb 23 - Tue, Mar 10
China Airlines Logo
12:10 am - 10:25 am
SEA
-
CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 7:10 pm
CNX
-
SEA
21h 45m1 stop
$752China Airlines
Sun, Mar 1 - Thu, Apr 30
EVA Air Logo
12:10 am - 10:35 am
SEA
-
CNX
19h 25m1 stop
EVA Air Logo
11:35 am - 6:50 pm
CNX
-
SEA
21h 15m1 stop
$775EVA Air
Wed, Jan 21 - Thu, Jan 29
EVA Air Logo
12:10 am - 10:35 am
SEA
-
CNX
19h 25m1 stop
EVA Air Logo
11:50 am - 6:10 pm
CNX
-
SEA
21h 20m1 stop
$818EVA Air
Booking Insights

KAYAK's insights & trends for Seattle to Thailand flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Thailand, 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 Seattle to Thailand is September, when tickets cost $751 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $1,232 and $1,227 respectively.

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

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

If you are looking for a flight deal from Seattle to Thailand, look for departures on Tuesdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Thailand, Wednesday is the cheapest day to fly and Thursday is the most expensive.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Thailand, 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 Seattle to Thailand, you should book around 6 weeks before departure, which saves you about 3% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonJune
Cheapest flight$278
Best time to beat the crowds but there is an average 35% increase in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Seattle to Phuket City

FAQs - booking Thailand flights

  • Are there onsite hotels at Bangkok Airports?

    There are multiple onsite hotels in both Bangkok airports where you can spend some quality time during a layover or spend the night if you are landing late. If you are landing at BKK, you can consider making reservations at the Novotel Suvarnabhumi Airport Hotel, which is a 5-minute walk from the airport. On the other hand, at DMK, you can spend thenight at Sleep Box by Miracle, situated in terminal 2.

  • Which is the most ideal ground transportation in Bangkok?

    When you land in Bangkok, you should opt for car rental services if you want the freedom to explore the city. DMK has multiple car rental agencies such as SIXT, Budget, Hertz, Avis, National and Chic. The car rental booths are located in terminals 1 and 2 DMK. On the other hand, at BKK, you will find rental car agencies, including Europcar, Hertz, Avis, Chic, National, Bizcar and Thai, located in Gate 8 near the passenger terminal 8.

  • Are there any family services at SEA?

    SEA offers exceptional family services that parents or guardians flying through the airport can take advantage of with their kids. The airport features a kids’ play area located between Gate A and the central terminal. Nursing mothers can also access private nursing rooms at the airport’s main terminal.

  • What amenities and services can I have access to at SEA?

    While at SEA, you can enjoy a live music performance from Experience the City Music. Alternatively, you can explore the impressive and eclectic collection of modern sculpture, painting, glass, photography and sound art.

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

    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 Thailand.

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

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

    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 from Seattle to Thailand with an airline and back with another airline.

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

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

  • What is the cheapest time of day to fly to Thailand?

    The cheapest time of day to fly to Thailand is generally in the morning, when round-trip flights cost $986 on average. Morning departures are around 6% cheaper than evening flights, on average. The most expensive time of day to fly to Thailand is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,081.

Top tips for finding cheap flights to Thailand

  • If you are flying from Seattle to Thailand, ensure that you arrive at the airport at least 3 hours before your scheduled flight departure time. As such, you will have enough time to go through the immigration, get your boarding pass and arrive at your departure terminal without risking missing your flight. Alternatively, you can check in online through your airline website.
  • Seattle Tacoma International Airport (SEA) has several parking options for passengers who wish to leave their cars at the airport while flying from Seattle to Thailand. The airport features both onsite and offsite parking lots. Therefore, you can opt for the offsite parking lot, which is more affordable than the onsite parking lots, if you plan on an extended stay. The onsite parking lots are located at the terminal direct on the upper floors.
  • Upon your arrival at Suvarnabhumi International Airport (BKK) and looking for specific information, you don’t need to worry. The airport features multiple information booths with friendly staff that are always ready to assist. The information desks are located in the arrivals and departure areas.
  • Don Mueang International Airport (DMK) is equipped with shower facilities that passengers using the airport can utilize after a long flight from Seattle. The shower amenities are located in Miracle Lounge in the Domestic departures terminal 2. Charges may apply, so ensure that you confirm with the management before using the amenities.
  • SEA offers unique services for passengers with reduced mobility. If you are flying through the airport, you can have access to wheelchair services and extra assistance. However, for easy access to these services, you need to call your airline prior to your flight date, informing them of what you might need. On the other hand, DMK and BKK have wheelchair-accessible washrooms, parking lots and elevators.

Reviews of the top 5 airlines serving from Seattle to Thailand

 
Need help choosing which airline to fly with from Seattle to Thailand? 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.
8.4
EVA AirOverall score based on 1296 reviews
8.0Entertainment
8.1Food
8.6Crew
8.3Comfort
8.4Boarding
Airline reviews

We were very impressed with the modern plane its amenities, as well as the services of flight attendants.

10.0 ExcellentVip, Dec 2025
LAX - TPE
Read more EVA Air reviews

We were very impressed with the modern plane its amenities, as well as the services of flight attendants.

Everything was great, however the seats in the back are very small. Not as Comfortable as I would have liked.

Although the flight was slightly delayed, it was well communicated with the passengers. The staff are all nice and accommodating, the pilot are very good. I didn’t realize that the plane was on the ground already. It landed smoothly. I’ll for surely recommend EVA Air to my friends.

The crew very accommodating and food too is good. Keep up the good work

Service in BKK was very good at answering our question about our canceled flight from Taipei to San Francisco. Did like the lead time about the canceled flight from Taipei to San Francisco and was not given the best options.

The crews are very efficient. Other airlines should learn from them when it comes to boarding and departing from the airplane. They also display efficiency in serving meals. They don't keep the aisles blocked for hours like some other airlines. The food is poor. Generally the food was unrecognizable and poorly prepared. The only thing that made it better than US flag carriers is that there was a fresh fruit bowl with each meal.

Very good service and food. Crew was professional and considerate. Cabin and restrooms were kept clean

Flight Attendants could have been nicer and food portions could be bigger.

Great experience, comfort and food is delicious. Always great service and one time

The food from Los Angeles to Taipei made me throw up. The flight is also not comfort. But the staffs are very friendly and nice.

First trip from Tulsa to Houston by air. It went by quickly. I watched half a movie and continued the rest on the next flight. Staff was considerate and helpful.

The meals were sufficient and tasty considering it was air travel food. Water coffee and juices offered each time a meal came by and water distributed between meals. It was good service in my opinion. Plenty of movies to enjoy. May not be the one you want but plenty of older movies and plenty of current ones as well. I enjoyed the trip.

Flight was good and comfortable, even for long haul economy. No complaints.

Checking in via an alliance partner, even a foreign one should get TSA Precheck printed on your boarding pass. The paper copy issued by ANA didn’t show it. I couldn’t get my digital copy due to some technical issue arising because I checked in with ANA. The kiosks at SFO similarly threw an error. The only way I could have gotten a new copy of my boarding pass was from the UA counter and lines were nearly as long as TSA so I bit the bullet and went through the regular TSA line. If UA wants my business, they need to improve that process.

Suite lounge in Honolulu is very exclusive and boarding from the lounge into the plane is unique. First suites were huge and comfortable. Japanese meal is like a high end omakase meal. All the staff were very kind and provided sophisticated service. Fast Track upon landing was appreciated but not needed this time because immigration was so empty and easy.

I like the service very much. The food just okay but maybe different culture who like, who don't like.

Everything was excellent. Only the fish entree in the Japanese meal was overcooked and quite dry but everything else was great

Warm the bread. Movies: better choices to include Chinese movies options or some of the older winners of flim festival

Almost 6 hours of delay with over 12 gate changes. Flight was supposed to depart around 6 and instead depart after 12am. No accommodations were offered than some snacks closer to midnight when the crew was planning to throw away some snacks.

The crew was very nice and polite. They made sure everybody got their meal and drinks. Even the economy class had a very adequate leg room for someone that is over 6 foot tall.

Very bad. They don’t allow group people to sit together by blocking most of seats and opening only single seat during online checking in. . By doing so, they can rip off customers at the check-in counter by collecting extra money if we want to sit together in the same row.

Delayed. Not a full flight and whole rows left open with the paid seating. Food was ok. My beef meal only had one cube of beef the rest carrot cubes. Entertainment on personal device but didn’t know about it until the flight was almost done.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

The flat bed full lying position is not comfortable at all, this could be improved, it is at an awkward position which i dont have the same issues with other airlines business class.

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I love my Delta crew, they were so welcoming and helpful.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

Better organization of boarding procedures. Terrible leadership guiding people to gates.

I did not like how the plane landed. It was not smooth.

Been flying with China Airline over years many times. Good experience with them, no issues.

The customer service was excellent. They noticed that our connecting flight was scheduled too closely for us to complete customs, so they changed the flight. Our initial flight was delayed, and they were able to get us on another flight, all without charging us any additional fees. I would fly them again anytime!

Better screens, it would have been nice to have more comfortable seats.

2nd major delay due to maintenance issues. 1st delay missed my connecting flight.

It was great, but my bag was not loaded onto the connecting flight. I'm currently getting it resolved. If this isn't a problem, everything else was excellent.

The aircraft was massive (A-380) and became crowded with 400+ passengers on board.

The plane hasnt left im stuck in seatle still my flight has been grounded for almost 5 hours

My luggage didn’t arrive with my flight. Flight was delayed by nearly 2 hours while we sat on the plane and I almost missed my connecting flight and subsequently missed the last train from the airport so it took me another 2 hours to get to my destination after arriving, Crew skipped me several times when offering beverages, and I couldn’t get their attention at times because they wouldn’t even make eye contact with me. They didn’t give me a form for disembarking so I had to go to the back of the line after waiting an eternity for immigration. Paid for on flight wi- fi that didn’t work for most of the flight.

Love flying Asiana. Been using it for over a decade now.

The staff was courteous and the flight was very smooth. It was so nice to see the captain greeting the passengers at the end of the flights.

The beefsteak on the lunch menu was excellent! I usually do not eat airplane food. I loved it.

SQ service is great as always. However, the food quality seems to have gotten a lot worse recently.

The consistency with Singapore Airlines is fantastic. Crew are always brilliant and food delicious in business class

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

Crew and service excellent. 2 hour delay for takeoff. SQ app showed flight on time.

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

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.

Everything was great keep up the good work 😁, can't ask for more.

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.

The staff on Singapore Airlines was incredible. I would like to commend LS Reuben from my SQ37 flight on November 19th, 2024, from LAX to Singapore, for his outstanding service and care. During the flight, one of my earbuds—brand new and valued at nearly $300—fell out and became lodged in the box controlling the in-flight entertainment system. I was understandably upset, but Reuben went above and beyond to assist me in this tough situation. Reuben demonstrated exceptional determination and empathy. Instead of suggesting we wait for an engineer, he immediately took action, spending almost 30 minutes searching for the earbud. He even got down on the floor to ensure it was recovered. His genuine concern and persistence made all the difference and turned a frustrating situation into one where I felt truly valued as a passenger. Reuben is a shining example of the remarkable service that sets Singapore Airlines apart. His dedication and willingness to go the extra mile left a lasting impression, and I want to sincerely thank him for his kindness and professionalism.

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

Information on your arrival and departure airports