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$382+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
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 60 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 septiembre 16, 2025.

Round-trip from

$956
(Trip.com)

One-way from

$382
(Trip.com)

Popular in

July

Cheapest in

October

Average price

$1,220
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. 9% potential increase in price ($130 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in September 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 septiembre 16, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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.
mar. 9/167:40 amSTL - BKK
2 stops29h 25mDelta
mar. 9/239:50 amBKK - STL
2 stops26h 48mDelta
Deal found 9/15$979
This FlightHub deal was found by Cheapflights users on 9/14. 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.
lun. 9/158:10 amSTL - BKK
2 stops32h 25mANA
dom. 9/219:35 pmBKK - STL
2 stops28h 44mANA
Deal found 9/14$982
This United Airlines deal was found by Cheapflights users on 9/16. 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.
lun. 12/296:00 amSTL - BKK
2 stops34h 10mUnited Airlines
jue. 1/89:10 amBKK - STL
2 stops25h 03mUnited Airlines
Deal found 9/16$984
This United Airlines deal was found by Cheapflights users on 9/15. 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. 11/131:35 pmSTL - BKK
3 stops32h 50mUnited Airlines
lun. 11/244:55 pmBKK - STL
3 stops32h 44mUnited Airlines
Deal found 9/15$998
This oojo deal was found by Cheapflights users on 9/15. 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.
mar. 10/213:57 pmSTL - BKK
2 stops36h 23mChina Airlines
mar. 10/2810:55 amBKK - STL
2 stops40h 23mChina Airlines
Deal found 9/15$1,022
This Delta deal was found by Cheapflights users on 9/15. 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. 9/249:19 amSTL - BKK
2 stops39h 56mDelta
dom. 9/2811:30 pmBKK - STL
2 stops37h 08mDelta
Deal found 9/15$1,029
This FlightHub deal was found by Cheapflights users on 9/13. 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.
dom. 11/306:00 amSTL - BKK
2 stops45h 25mJapan Airlines
lun. 12/158:05 amBKK - STL
2 stops28h 54mJapan Airlines
Deal found 9/13$1,032
This United Airlines deal was found by Cheapflights users on 9/13. 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. 11/278:00 amSTL - BKK
3 stops38h 25mUnited Airlines
vie. 12/194:55 pmBKK - STL
3 stops57h 26mUnited Airlines
Deal found 9/13$1,052
This oojo deal was found by Cheapflights users on 9/14. 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.
dom. 9/286:00 amSTL - BKK
2 stops40h 50mEVA Air
mié. 10/14:45 pmBKK - STL
2 stops43h 14mEVA Air
Deal found 9/14$1,055
This oojo deal was found by Cheapflights users on 9/14. 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.
mié. 11/57:00 amSTL - BKK
2 stops39h 30mEVA Air
mié. 11/192:40 pmBKK - STL
2 stops37h 38mEVA Air
Deal found 9/14$1,057
This Ovago deal was found by Cheapflights users on 9/15. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/198:10 amSTL - BKK
2 stops32h 25mANA
dom. 9/219:35 pmBKK - STL
2 stops32h 48mANA
Deal found 9/15$1,058

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 septiembre 16, 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

lun. 12/29

6:00 am-5:10 am

2 stops34h 10m

Bangkok Suvarnabhumi

jue. 1/8

9:10 am-9:13 pm

2 stops25h 03m

$984

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 3/4

2:55 pm-12:05 pm

2 stops32h 10m

Bangkok Suvarnabhumi

jue. 3/26

7:15 am-12:20 pm

2 stops41h 05m

$987

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 11/5

11:20 am-11:25 am

3 stops35h 05m

Bangkok Suvarnabhumi

mié. 11/19

4:55 pm-12:28 pm

3 stops32h 33m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 3/2

1:11 pm-11:25 am

3 stops33h 14m

Bangkok Suvarnabhumi

lun. 4/20

3:40 pm-11:09 am

3 stops31h 29m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 1/7

5:00 pm-11:25 am

2 stops53h 25m

Bangkok Suvarnabhumi

mié. 3/4

9:10 am-6:33 pm

2 stops46h 23m

$1,000

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 2/16

8:21 am-5:10 am

2 stops31h 49m

Bangkok Suvarnabhumi

dom. 3/8

4:55 pm-5:03 pm

2 stops36h 08m

$1,003

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 2/4

5:00 pm-11:25 am

2 stops29h 25m

Bangkok Suvarnabhumi

mié. 2/11

4:55 pm-10:46 am

3 stops30h 51m

$1,007

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

vie. 2/20

2:45 pm-11:25 am

3 stops31h 40m

Bangkok Suvarnabhumi

lun. 3/2

4:55 pm-3:38 pm

3 stops35h 43m

$1,038

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

vie. 11/7

7:45 pm-9:25 pm

3 stops36h 40m

$382

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sáb. 9/27

4:58 pm-9:10 pm

3 stops40h 12m

$470

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 14 results
1
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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 September 12, 2025.

Booking 60 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, September is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $900). Flying from St. Louis to Bangkok in December is currently the most expensive (average of $1,507). 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 septiembre 16, 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.

How much does it cost to fly round-trip from St. Louis to Bangkok?

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 septiembre 16, 2025.
Get a feel of what it's like to fly with ANA, Japan Airlines, and Delta 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.
ANA
8.4
Very good
963 reviews

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
ANA
8.4
Very good
963 reviews
ANA
8.4
Very good
963 reviews

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Japan Airlines
8.3
Very good
1,559 reviews
ANA
8.4
Very good
963 reviews

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Delta
8.0
Very good
7,957 reviews
ANA
8.4
Very good
963 reviews

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Cathay Pacific
7.6
Good
994 reviews
ANA
8.4
Very good
963 reviews

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
United Airlines
7.4
Good
8,924 reviews
ANA
8.4
Very good
963 reviews

Boarding

8.6

Crew

8.7

Food

7.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me

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 9 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.

  • How long is the flight from St. Louis to Bangkok?

    A quick flight from St. Louis to Bangkok can take about 34h 10m. United Airlines provides one of the quickest options available for as low as $984. St. Louis and Bangkok are separated by a distance of 8737 mi.

  • 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 $897. Other airlines that can offer you cheap pricing are American Airlines, from $954, and Japan Airlines, from $994. Qatar Airways is priced at 30% lower than the current average price of a flight leaving 3 months from now.

  • 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, September is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $900). Flying from St. Louis to Bangkok in December is currently the most expensive (average of $1,507). 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 9 airlines flying from St. Louis to Bangkok

Discover the top 9 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,365FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$954Average$1,242FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$994Average$1,164FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$1,030Average$1,161FlexibilityNo cancel feeOn-time69%
ANACheapest$1,053Average$1,190FlexibilityNo cancel feeOn-time80%
DeltaCheapest$1,058Average$1,631FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$1,176Average$1,747FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,211Average$1,389FlexibilityNo cancel feeOn-time72%
FinnairCheapest$1,289Average$1,456FlexibilityNo cancel feeOn-time76%

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