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Cheap flights from St. Louis (STL) to Bangkok

STL — BKK
Nov 20 — Nov 271
Fri 11/20
Fri 11/27
1 adult, Economy
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Find flight deals from St. Louis to Bangkok

Popular in

December

Cheapest in

August

Average price

$1,347
Highest demand for flights based on searches. 11% potential increase in price ($165 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($59 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Best time to book a flight from St. Louis to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok from St. Louis with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Bangkok

How far ahead should I book a flight from St. Louis to Bangkok?

Booking 7 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Bangkok. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from St. Louis to Bangkok?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $979). Flying from St. Louis to Bangkok in December is currently the most expensive (average of $1,985). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Bangkok

Get a feel of what it's like to fly with Japan Airlines,Delta, andCathay Pacific from St. Louis to Bangkok by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,942 reviews

Overall

8.3

Boarding

8.4

Food

7.7

Comfort

8.2

Crew

8.7

Entertainment

7.8

Reviews

1 / 20
4.0
Okay

Clark,Aug 2026

BDL - ORD

I had some checked bags that were fragile. I asked about them being tagged fragile. Answer was "we don't do that". Disappointed. Otherwise flight was ok.
Japan Airlines
8.3
Very good
1,942 reviews
Japan Airlines
8.3
Very good
1,942 reviews

Overall

8.3

Boarding

8.4

Food

7.7

Comfort

8.2

Crew

8.7

Entertainment

7.8

Reviews

1 / 20
4.0
Okay

Clark,Aug 2026

BDL - ORD

I had some checked bags that were fragile. I asked about them being tagged fragile. Answer was "we don't do that". Disappointed. Otherwise flight was ok.
Delta
7.8
Good
8,652 reviews
Japan Airlines
8.3
Very good
1,942 reviews

Overall

8.3

Boarding

8.4

Food

7.7

Comfort

8.2

Crew

8.7

Entertainment

7.8

Reviews

1 / 20
4.0
Okay

Clark,Aug 2026

BDL - ORD

I had some checked bags that were fragile. I asked about them being tagged fragile. Answer was "we don't do that". Disappointed. Otherwise flight was ok.
Cathay Pacific
7.6
Good
1,523 reviews
Japan Airlines
8.3
Very good
1,942 reviews

Overall

8.3

Boarding

8.4

Food

7.7

Comfort

8.2

Crew

8.7

Entertainment

7.8

Reviews

1 / 20
4.0
Okay

Clark,Aug 2026

BDL - ORD

I had some checked bags that were fragile. I asked about them being tagged fragile. Answer was "we don't do that". Disappointed. Otherwise flight was ok.
United Airlines
7.4
Good
10,390 reviews
Japan Airlines
8.3
Very good
1,942 reviews

Overall

8.3

Boarding

8.4

Food

7.7

Comfort

8.2

Crew

8.7

Entertainment

7.8

Reviews

1 / 20
4.0
Okay

Clark,Aug 2026

BDL - ORD

I had some checked bags that were fragile. I asked about them being tagged fragile. Answer was "we don't do that". Disappointed. Otherwise flight was ok.
Qatar Airways
7.3
Good
3,707 reviews
Japan Airlines
8.3
Very good
1,942 reviews

Overall

8.3

Boarding

8.4

Food

7.7

Comfort

8.2

Crew

8.7

Entertainment

7.8

Reviews

1 / 20
4.0
Okay

Clark,Aug 2026

BDL - ORD

I had some checked bags that were fragile. I asked about them being tagged fragile. Answer was "we don't do that". Disappointed. Otherwise flight was ok.

Related info for your journey

  • What airport do you fly from for flights from St. Louis to Bangkok?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Bangkok. You should not have trouble finding flights to Bangkok from Lambert-St Louis; the airport handles an average of 0 outbound flights to Bangkok per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the St. Louis airport to Bangkok. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • What are the cheapest airlines flying from St. Louis to Bangkok round-trip?

    Cheapflights users have booked flights from St. Louis to Bangkok round-trip from $881. Other airlines that can offer you cheap pricing are Japan Airlines, from $929, and Qatar Airways, from $946. Delta is priced at 33% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Bangkok one-way?

    For one-way options, check prices for Cathay Pacific. According to our data, you can fly for as low as $481. Users have also found prices from $494 and $531 on United Airlines and Delta, respectively.

  • Can I find deals for flights from St. Louis to Bangkok that include hotel bookings?

    Yes. In addition to deals on St. Louis to Bangkok flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Bangkok?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Bangkok.

  • Can I find deals for business class flights from St. Louis to Bangkok?

    Yes. Cheapflights offers flight deals from St. Louis to Bangkok by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Bangkok?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $979). Flying from St. Louis to Bangkok in December is currently the most expensive (average of $1,985). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 8 airlines flying from St. Louis to Bangkok

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$881Average$1,270FlexibilityNo cancel feeOn-timeN/A
Japan AirlinesCheapest$929Average$1,045FlexibilityNo cancel feeOn-time79%
Qatar AirwaysCheapest$946Average$1,244FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$948Average$1,196FlexibilityNo cancel feeOn-time71%
Cathay PacificCheapest$974Average$1,399FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$982Average$1,318FlexibilityNo cancel feeOn-time69%
EVA AirCheapest$1,048Average$1,456FlexibilityNo cancel feeOn-time74%
ANACheapest$1,207Average$1,551FlexibilityNo cancel feeOn-time80%

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