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$429+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
dic. 6 — dic. 131
sáb. 12/6
sáb. 12/13
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Bangkok are usually found in September or October, booked 81 days in advance, depart on a Monday or Saturday and return on a Thursday

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 noviembre 6, 2025.

This Delta deal was found by Cheapflights users on 11/6. 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.
lun. 12/16:40 amSTL - BKK
2 stops29h 05mDelta
jue. 12/182:05 amBKK - STL
2 stops34h 22mDelta
Deal found 11/6$1,018
This oojo deal was found by Cheapflights users on 11/5. 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. 11/68:39 amSTL - BKK
2 stops37h 01mCathay Pacific
dom. 11/237:55 amBKK - STL
2 stops38h 01mCathay Pacific
Deal found 11/5$1,027
This United Airlines deal was found by Cheapflights users on 11/6. 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.
sáb. 11/293:14 pmSTL - BKK
2 stops44h 06mUnited Airlines
lun. 12/154:55 pmBKK - STL
3 stops32h 44mUnited Airlines
Deal found 11/6$1,047
This United Airlines deal was found by Cheapflights users on 11/5. 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. 11/135:29 pmSTL - BKK
2 stops52h 56mUnited Airlines
lun. 11/244:55 pmBKK - STL
3 stops34h 29mUnited Airlines
Deal found 11/5$1,056
This Ovago deal was found by Cheapflights users on 11/5. 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.
jue. 11/137:00 amSTL - BKK
2 stops28h 15mCathay Pacific
lun. 11/245:40 pmBKK - STL
2 stops41h 54mCathay Pacific
Deal found 11/5$1,069
This United Airlines deal was found by Cheapflights users on 11/4. 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. 12/45:30 pmSTL - BKK
2 stops28h 55mUnited Airlines
jue. 12/114:55 pmBKK - STL
3 stops35h 45mUnited Airlines
Deal found 11/4$1,071
This United Airlines deal was found by Cheapflights users on 11/5. 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. 11/65:29 pmSTL - BKK
2 stops52h 56mUnited Airlines
dom. 11/234:55 pmBKK - STL
3 stops36h 33mUnited Airlines
Deal found 11/5$1,096
This United Airlines deal was found by Cheapflights users on 11/6. 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. 12/111:20 amSTL - BKK
3 stops35h 05mUnited Airlines
vie. 12/194:55 pmBKK - STL
3 stops42h 27mUnited Airlines
Deal found 11/6$1,102

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 noviembre 6, 2025.

Round-trip from

$970
(oojo)

One-way from

$429
(Trip.com)

Popular in

July

Cheapest in

September

Average price

$1,201
From Lambert-St Louis to Bangkok
Search Deals
One-way flight from Lambert-St Louis to Bangkok
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($134 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 noviembre 6, 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. 4/1

5:18 pm-4:35 am

2 stops47h 17m

Bangkok Suvarnabhumi

jue. 4/30

3:40 pm-12:20 pm

3 stops32h 40m

$1,004

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

4:55 pm-2:31 pm

3 stops34h 36m

$1,015

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 12/1

6:40 am-12:45 am

2 stops29h 05m

Bangkok Suvarnabhumi

jue. 12/18

2:05 am-11:27 pm

2 stops34h 22m

$1,018

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 2/25

10:25 am-9:50 am

2 stops34h 25m

Bangkok Suvarnabhumi

sáb. 3/7

3:35 am-12:30 am

2 stops33h 55m

$1,036

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 1/7

11:05 am-12:15 pm

2 stops36h 10m

Bangkok Suvarnabhumi

mar. 3/3

3:00 am-6:11 pm

2 stops28h 11m

$1,038

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 2/25

9:55 am-5:10 am

2 stops30h 15m

Bangkok Suvarnabhumi

dom. 3/8

4:55 pm-4:52 pm

3 stops35h 57m

$1,039

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sáb. 11/29

3:14 pm-12:20 am

2 stops44h 06m

Bangkok Suvarnabhumi

lun. 12/15

4:55 pm-12:39 pm

3 stops32h 44m

$1,047

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 12/8

7:43 pm-9:25 pm

3 stops36h 42m

$429

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 3/30

7:00 am-6:05 pm

3 stops47h 05m

$557

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 12/15

7:43 pm-12:10 am

3 stops39h 27m

$626

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 15 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 October 31, 2025.

Booking 78 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 $963). Flying from St. Louis to Bangkok in June is currently the most expensive (average of $1,263). 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 noviembre 6, 2025.

It’s typically best to fly out from St. Louis to Bangkok in the evening. Doing so could potentially save you 22% on the flight price compared to flying in the morning, 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 evenings 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 noviembre 6, 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
1,003 reviews

Food

7.7

Crew

8.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Boarding

8.6

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
1,003 reviews
ANA
8.4
Very good
1,003 reviews

Food

7.7

Crew

8.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Boarding

8.6

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
1,604 reviews
ANA
8.4
Very good
1,003 reviews

Food

7.7

Crew

8.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Boarding

8.6

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
7.9
Good
8,001 reviews
ANA
8.4
Very good
1,003 reviews

Food

7.7

Crew

8.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Boarding

8.6

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
1,055 reviews
ANA
8.4
Very good
1,003 reviews

Food

7.7

Crew

8.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Boarding

8.6

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
9,007 reviews
ANA
8.4
Very good
1,003 reviews

Food

7.7

Crew

8.7

Comfort

8.2

Entertainment

7.9

Overall

8.4

Boarding

8.6

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 47h 17m. United Airlines provides one of the quickest options available for as low as $997. 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 $979, and Japan Airlines, from $985. Qatar Airways is priced at 29% 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, August is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $963). Flying from St. Louis to Bangkok in June is currently the most expensive (average of $1,263). 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 noviembre 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,213FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$979Average$1,278FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$985Average$1,143FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$986Average$1,167FlexibilityNo cancel feeOn-time69%
ANACheapest$1,007Average$1,217FlexibilityNo cancel feeOn-time80%
DeltaCheapest$1,058Average$1,631FlexibilityNo cancel feeOn-timeN/A
Cathay PacificCheapest$1,060Average$1,377FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$1,176Average$1,747FlexibilityNo cancel feeOn-time67%
FinnairCheapest$1,289Average$1,456FlexibilityNo cancel feeOn-time76%

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