Cheap flights from Seattle to Bangkok

One-way fares from $257 · SEA → BKK · prices found by travellers in the last 48 hours

Compare all dates Bangkok → Seattle
Cheapest fare
$257

Hainan Airlines · Thu, Feb 11

Cheapest month
February

from $257

Direct flights
Not recently

Usually 1+ stop

Quickest trip
17h 25m

11,980 km

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Cheapest month to fly from Seattle to Bangkok

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $454
  2. December 2026 $541
  3. February 2027 Cheapest $257

Cheapest dates in February 2027

The lowest fares we've seen for each day, cheapest first.

Hainan Airlines
Depart10:05 Thu, Feb 11SEA → BKK 18h 35m · 1 stop
$257one way, per person
View deal
See every date in February 2027 →

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About flights from Seattle to Bangkok

Seattle (SEA) and Bangkok (BKK) are about 11,980 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 17h 25m. Over the next few months, one-way fares start from $257, and February 2027 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Seattle to Bangkok?

The cheapest one-way fare we've seen recently is $257 with Hainan Airlines, departing Thursday, February 11, 2027. Over the coming months, the lowest fare in each month ranges from $257 to $541.

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

February 2027 currently has the lowest fares, from $257 one way.

Are there direct flights from Seattle to Bangkok?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Seattle to Bangkok?

The quickest journey we've seen takes about 17h 25m. Seattle and Bangkok are around 11,980 km apart.

Which airlines fly from Seattle to Bangkok?

Recent fares on this route were with Cathay Pacific, Frontier Airlines and Hainan Airlines.

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