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$533+ Cheap flights from St. Louis (STL) to Bangkok

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Bangkok are usually found in October or January, booked 76 days in advance, depart on a Monday or Saturday and return on a Thursday

Cheap flight deals from St. Louis to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Bangkok (TH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated junio 12, 2025.

Round-trip from

$978
(Delta)

One-way from

$533
(FlightHub)

Popular in

December

Cheapest in

October

Average price

$1,558
From Lambert-St Louis to Bangkok
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One-way flight from Lambert-St Louis to Bangkok
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Highest demand for flights based on searches. 3% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from St. Louis to Bangkok

Cheapest flights from St. Louis to Bangkok
Explore the most affordable flight options available from St. Louis to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/306:00 amSTL - BKK
2 stops27h 45mDelta
mar. 9/22:35 amBKK - STL
2 stops30h 41mDelta
Deal found 6/12$978
This Gurufare deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/289:17 amSTL - BKK
2 stops31h 18mANA
mié. 9/39:35 pmBKK - STL
2 stops28h 44mANA
Deal found 6/12$980
This Fareboom deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/277:00 amSTL - BKK
2 stops26h 30mMultiple Airlines
jue. 12/48:05 amBKK - STL
2 stops28h 51mMultiple Airlines
Deal found 6/11$987
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/271:35 pmSTL - BKK
3 stops32h 15mUnited Airlines
jue. 12/47:10 amBKK - STL
2 stops27h 00mUnited Airlines
Deal found 6/11$990
This oojo deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/66:33 amSTL - BKK
2 stops41h 37mChina Airlines
lun. 11/32:35 amBKK - STL
2 stops49h 30mChina Airlines
Deal found 6/12$1,018
This oojo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/272:55 pmSTL - BKK
2 stops31h 15mEVA Air
mié. 12/32:15 amBKK - STL
2 stops48h 37mEVA Air
Deal found 6/11$1,097
This FlightHub deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/1411:17 amSTL - BKK
2 stops25h 48mKorean Air
lun. 6/169:40 pmBKK - STL
2 stops37h 42mKorean Air
Deal found 6/10$1,470
This Qatar Airways deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/25:00 amSTL - BKK
2 stops43h 55mQatar Airways
mar. 9/22:30 amBKK - STL
2 stops32h 20mQatar Airways
Deal found 6/12$1,532
This Gurufare deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/171:55 pmSTL - BKK
2 stops27h 15mFinnair
mié. 12/243:00 pmBKK - STL
2 stops40h 19mFinnair
Deal found 6/10$1,740
This Fareboom deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/162:55 pmSTL - BKK
2 stops42h 10mAsiana Airlines
vie. 12/2611:55 pmBKK - STL
2 stops37h 01mAsiana Airlines
Deal found 6/12$1,747
This Air Canada deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/174:15 pmSTL - BKK
2 stops49h 00mAir Canada
mié. 12/248:00 amBKK - STL
2 stops44h 26mAir Canada
Deal found 6/11$1,812

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Bangkok 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, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
Use the filters below to find and compare flights from St. Louis to Bangkok that are best for you.

Fly from

St. Louis

Fly to

Bangkok

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 7/30

6:00 am-9:45 pm

2 stops27h 45m

Bangkok Suvarnabhumi

mar. 9/2

2:35 am-9:16 pm

2 stops30h 41m

$978

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

jue. 8/28

9:17 am-4:35 am

2 stops31h 18m

Bangkok Suvarnabhumi

mié. 9/3

9:35 pm-2:19 pm

2 stops28h 44m

$980

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sáb. 8/2

5:41 pm-4:35 am

2 stops46h 54m

Bangkok Suvarnabhumi

lun. 9/8

9:35 am-4:53 pm

2 stops43h 18m

$1,024

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

jue. 8/7

7:32 pm-11:20 am

2 stops27h 48m

Bangkok Suvarnabhumi

lun. 8/11

4:45 pm-11:59 pm

2 stops43h 14m

$1,268

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sáb. 8/16

7:32 pm-11:20 am

2 stops27h 48m

Bangkok Suvarnabhumi

lun. 8/18

4:45 pm-2:26 pm

2 stops33h 41m

$1,280

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sáb. 8/2

5:00 am-12:55 pm

2 stops43h 55m

Bangkok Suvarnabhumi

mar. 9/2

2:30 am-10:50 pm

2 stops32h 20m

$1,532

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mar. 7/8

7:32 pm-9:45 am

2 stops26h 13m

Bangkok Suvarnabhumi

lun. 7/14

2:40 am-6:35 pm

2 stops51h 55m

$1,549

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 8/6

7:01 am-11:00 pm

2 stops27h 59m

Bangkok Suvarnabhumi

sáb. 8/30

8:05 am-7:21 pm

2 stops23h 16m

$2,374

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

dom. 8/31

4:00 pm-9:55 pm

2 stops41h 55m

Bangkok Suvarnabhumi

vie. 11/14

8:00 am-3:26 pm

2 stops44h 26m

$5,109

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 7/28

6:14 am-5:50 am

2 stops35h 36m

$533

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 14 results
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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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Bangkok. Price data was last updated on June 9, 2025.

Booking 76 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, March is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $953). Flying from St. Louis to Bangkok in December is currently the most expensive (average of $1,574). 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.

What is the cheapest time of day to fly from STL to BKK?

Find hourly flight availability from St. Louis to Bangkok. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

It’s typically best to fly out from St. Louis to Bangkok in the morning. Doing so could potentially save you 24% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from St. Louis to Bangkok?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Bangkok. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their St. Louis to Bangkok flight should consider departing on Monday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Bangkok by month

Plan your trip to Bangkok by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bangkok ranges from 0.4 - 12.6 inches per month. September is typically the wettest month, when rainfall can reach 12.6 in. January is typically the driest time to visit Bangkok when rainfall is around 0.4 in.

Temperature in Bangkok by month

Plan your trip to Bangkok by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bangkok, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bangkok. Reviews last updated junio 12, 2025.
Read reviews from past customers who have flown EVA Air, Japan Airlines and China Airlines from St. Louis to Bangkok. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
EVA Air
8.4
Very good
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Japan Airlines
8.3
Very good
1,489 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
China Airlines
8.3
Very good
738 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
ANA
8.3
Very good
882 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.
Delta
8.0
Very good
7,950 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

TPE - SEA

The flight and crew were exceptional as always when I fly with EVA.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Bangkok. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 11 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 $978. Other airlines that can offer you cheap pricing are ANA, from $980, and United Airlines, from $1,024. Delta is priced at 28% 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 Japan Airlines. According to our data, you can fly for as low as $533. Users have also found prices from $534 and $541 on ANA 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, March is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $953). Flying from St. Louis to Bangkok in December is currently the most expensive (average of $1,574). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from St. Louis to Bangkok

Discover the top 10 airlines that operate flights from St. Louis to Bangkok. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,365FlexibilityNo cancel feeOn-time68%
ANACheapest$1,053Average$1,183FlexibilityNo cancel feeOn-time80%
Japan AirlinesCheapest$1,080Average$1,155FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$1,102Average$1,169FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,114Average$1,197FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$1,116Average$1,301FlexibilityNo cancel feeOn-time77%
DeltaCheapest$1,144Average$1,379FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$1,176Average$1,786FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,228Average$1,395FlexibilityNo cancel feeOn-time72%
Korean AirCheapest$1,259Average$1,339FlexibilityNo cancel feeOn-time81%

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