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Cheap flights from Seattle to Thailand from $278

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Thailand departing on 3/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
8:45 am - 10:10 amSEA-HKT
34h 25m1 stop
Singapore Airlines Logo
8:40 am - 7:10 amHKT-SEA
37h 30m1 stop
$555Singapore Airlines
Find Deal
vie., ene. 30 - lun., feb. 9
Singapore Airlines Logo
8:45 am - 5:10 pmSEA-HKT
41h 25m1 stop
Singapore Airlines Logo
11:05 am - 7:10 amHKT-SEA
35h 05m1 stop
$582Singapore Airlines
Find Deal
vie., ene. 16 - jue., ene. 29
Singapore Airlines Logo
8:45 am - 10:10 amSEA-HKT
34h 25m1 stop
Singapore Airlines Logo
11:05 am - 7:10 amHKT-SEA
35h 05m1 stop
$601Singapore Airlines
Find Deal
jue., feb. 26 - sáb., mar. 7
Singapore Airlines Logo
8:45 am - 2:05 pmSEA-HKT
38h 20m1 stop
Singapore Airlines Logo
10:05 am - 7:10 amHKT-SEA
36h 05m1 stop
$609Singapore Airlines
Find Deal
vie., ene. 23 - vie., feb. 6
Philippine Airlines Logo
10:30 pm - 11:00 pmSEA-BKK
34h 30m1 stop
Philippine Airlines Logo
1:25 pm - 8:05 pmBKK-SEA
20h 40m1 stop
$682Philippine Airlines
Find Deal
jue., mar. 19 - mar., mar. 31
China Airlines Logo
12:10 am - 10:25 amSEA-CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 6:10 pmCNX-SEA
21h 45m1 stop
$743China Airlines
Find Deal
dom., feb. 1 - jue., feb. 12
China Airlines Logo
12:10 am - 10:25 amSEA-CNX
19h 15m1 stop
China Airlines Logo
11:20 am - 7:30 pmCNX-SEA
22h 10m1 stop
$770China Airlines
Find Deal
mar., mar. 3 - sáb., abr. 4
EVA Air Logo
11:30 pm - 9:50 pmSEA-KBV
31h 20m2 stops
EVA Air Logo
10:30 pm - 6:10 pmKBV-SEA
34h 40m2 stops
$899EVA Air
Find Deal
mar., ene. 27 - lun., feb. 9
EVA Air Logo
11:30 pm - 9:50 pmSEA-KBV
31h 20m2 stops
EVA Air Logo
9:35 am - 5:30 pmKBV-SEA
22h 55m2 stops
$915EVA Air
Find Deal
jue., ene. 15 - jue., ene. 22
Qatar Airways Logo
11:40 am - 4:50 pmSEA-UTP
39h 10m3 stops
Qatar Airways Logo
1:00 pm - 6:53 pmUTP-SEA
43h 53m3 stops
$1,522Qatar Airways
Find Deal
mar., mar. 17 - vie., mar. 27

Philippine Airlines flights from Seattle to Thailand

Our best Philippine Airlines deals on Seattle to Thailand flight tickets
Philippine Airlines
Mar 19
SEA10:30 pmSeattle/Tacoma Intl
34h 30m
1 stop
BKK11:00 pmBangkok Suvarnabhumi
Mar 31
BKK1:25 pmBangkok Suvarnabhumi
20h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$682
Find similar
Philippine Airlines
May 8
SEA11:10 pmSeattle/Tacoma Intl
29h 20m
1 stop
BKK6:30 pmBangkok Suvarnabhumi
May 21
BKK1:25 pmBangkok Suvarnabhumi
20h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$697
Find similar
Philippine Airlines
Mar 13
SEA10:30 pmSeattle/Tacoma Intl
29h 20m
1 stop
BKK5:50 pmBangkok Suvarnabhumi
Mar 31
BKK1:25 pmBangkok Suvarnabhumi
20h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$722
Find similar

Hainan Airlines flights from Seattle to Thailand

Our best Hainan Airlines deals on Seattle to Thailand flight tickets
Hainan Airlines
Mar 12
SEA11:05 amSeattle/Tacoma Intl
33h 00m
2 stops
BKK10:05 amBangkok Suvarnabhumi
Mar 30
BKK1:50 pmBangkok Suvarnabhumi
33h 10m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$684
Find similar
Hainan Airlines
Jan 22
SEA10:05 amSeattle/Tacoma Intl
33h 35m
1 stop
BKK10:40 amBangkok Suvarnabhumi
Mar 6
BKK1:05 amBangkok Suvarnabhumi
21h 55m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$687
Find similar
Hainan Airlines
Feb 19
SEA10:05 amSeattle/Tacoma Intl
41h 00m
2 stops
BKK6:05 pmBangkok Suvarnabhumi
Mar 13
BKK4:20 pmBangkok Suvarnabhumi
30h 40m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$688
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Thailand that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated diciembre 3, 2025.
Use the filters below to find and compare flights from Seattle to Thailand that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

vie. 1/30

8:45 am-10:10 am

1 stop34h 25m

Phuket City

lun. 2/9

8:40 am-7:10 am

1 stop37h 30m

$555

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

vie. 1/16

8:45 am-5:10 pm

1 stop41h 25m

Phuket City

jue. 1/29

11:05 am-7:10 am

1 stop35h 05m

$582

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

jue. 2/26

8:45 am-10:10 am

1 stop34h 25m

Phuket City

sáb. 3/7

11:05 am-7:10 am

1 stop35h 05m

$601

SeattlePhuket City

SEA - HKT

SEAHKT

Seattle/Tacoma Intl

vie. 1/23

8:45 am-2:05 pm

1 stop38h 20m

Phuket City

vie. 2/6

10:05 am-7:10 am

1 stop36h 05m

$609

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

jue. 3/19

10:30 pm-11:00 pm

1 stop34h 30m

Bangkok Suvarnabhumi

mar. 3/31

1:25 pm-8:05 pm

1 stop20h 40m

$682

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

dom. 2/1

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

jue. 2/12

11:25 am-6:10 pm

1 stop21h 45m

$743

SeattleChiang Mai

SEA - CNX

SEACNX

Seattle/Tacoma Intl

mar. 3/3

12:10 am-10:25 am

1 stop19h 15m

Chiang Mai

sáb. 4/4

11:20 am-7:30 pm

1 stop22h 10m

$770

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

mar. 1/27

11:30 pm-9:50 pm

2 stops31h 20m

Krabi

lun. 2/9

10:30 pm-6:10 pm

2 stops34h 40m

$899

SeattleKrabi

SEA - KBV

SEAKBV

Seattle/Tacoma Intl

jue. 1/15

11:30 pm-9:50 pm

2 stops31h 20m

Krabi

jue. 1/22

9:35 am-5:30 pm

2 stops22h 55m

$915

SeattleRayong

SEA - UTP

SEAUTP

Seattle/Tacoma Intl

mar. 3/17

11:40 am-4:50 pm

3 stops39h 10m

Utapao Rayong Pattaya

vie. 3/27

1:00 pm-6:53 pm

3 stops43h 53m

$1,522

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Thailand from

How to get the cheapest flight ticket from Seattle to Thailand

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Thailand?

The month of September is, on average, the cheapest month to fly to Thailand from Seattle, with most prices found around $751. If you are unable to visit Thailand during the month of September, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $758.

What is the cheapest day to depart on your flight to Thailand?

The cheapest day to depart on your flight to Thailand is on a Tuesday when prices can be found for as low as $931. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Thailand is Friday, with ticket prices averaging around $1,111.

What is the cheapest time of day to depart on your flight to Thailand?

Flying to Thailand from Seattle in the morning is the least expensive time of day to depart. momondo users have found prices as low as $986 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Thailand is at noon when prices are around $1,081.

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

You are more likely to see cheaper flights to Thailand from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Thailand for around $887 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Thailand from Seattle for as low as $739 on momondo.

Can stopping save me money on Seattle to Thailand flights?

You could potentially save up to 59% on your flight if you consider stops on a Seattle to Thailand flight.

Cheap Seattle to Thailand flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Thailand

Fastest flight time

19h 40m

Direct flights

None
The fastest flight from Seattle to Thailand takes 19h 40m
There are no direct flights from Seattle to Thailand. There are no popular flight routes from Seattle to Thailand.
Search flight deals

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Thailand?

    Prices for flights from Seattle/Tacoma Intl Airport to Thailand were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Thailand?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Thailand?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Thailand.

  • What documentation or ID do you need to fly to Thailand?

    The required travel and health documents for your Thailand trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Thailand. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Seattle to Thailand

Compare and see reviews for airlines that fly from Seattle to Thailand with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $433Free CancellationRating
7.9
8,011 reviews
Search Delta flights
Singapore AirlinesPriceFrom $523Free CancellationRating
8.1
1,411 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $609Free CancellationRating
7.3
941 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $614Free CancellationRating
8.2
490 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $681Free CancellationRating
8.4
1,177 reviews
Search Korean Air flights
ANAPriceFrom $697Free CancellationRating
8.4
1,017 reviews
Search ANA flights
China AirlinesPriceFrom $730Free CancellationRating
8.3
787 reviews
Search China Airlines flights
Cathay PacificPriceFrom $735Free CancellationRating
7.6
1,082 reviews
Search Cathay Pacific flights
STARLUX AirlinesPriceFrom $740Free CancellationRating
8.9
239 reviews
Search STARLUX Airlines flights
United AirlinesPriceFrom $753Free CancellationRating
7.4
9,065 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Thailand?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Thailand for you.

Can I find flights from Seattle to Thailand with flexible booking policies on momondo?

Yes. All flights to Thailand from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Thailand?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Thailand.

I’m not ready to book a flight from Seattle to Thailand right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Thailand now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Thailand and let you know when they change.

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