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$497+ 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Feb 9 — Feb 161
Sun 2/9
Sun 2/16
1 adult, Economy
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The best prices from Lambert-St Louis to Bangkok are usually found in January or September, 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 February 4, 2025.

Round-trip from

$1,113
(Fareboom)

One-way from

$497
(oojo)

Popular in

December

Cheapest in

January

Average price

$1,302
From Lambert-St Louis to Bangkok
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One-way flight from Lambert-St Louis to Bangkok
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 4, 2025.

This Gurufare deal was found by Cheapflights users on 2/4. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/281:27 pmSTL - BKK
2 stops27h 08mANA
Wed 9/39:35 pmBKK - STL
2 stops31h 00mANA
Deal found 2/4$1,090
This Gurufare deal was found by Cheapflights users on 2/4. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:00 amSTL - BKK
2 stops33h 40mJapan Airlines
Tue 10/1412:25 amBKK - STL
2 stops34h 28mJapan Airlines
Deal found 2/4$1,093
This United deal was found by Cheapflights users on 2/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/281:27 pmSTL - BKK
2 stops27h 08mUnited Airlines
Tue 9/27:00 amBKK - STL
2 stops21h 26mUnited Airlines
Deal found 2/4$1,112
This Fareboom deal was found by Cheapflights users on 2/3. 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.
Mon 2/246:10 amSTL - BKK
2 stops27h 25mCathay Pacific
Mon 3/36:40 amBKK - STL
2 stops24h 25mCathay Pacific
Deal found 2/3$1,113
This Fareboom deal was found by Cheapflights users on 2/4. 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 Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/227:04 amSTL - BKK
2 stops33h 51mQatar Airways
Sun 3/23:00 amBKK - STL
2 stops28h 05mQatar Airways
Deal found 2/4$1,153
This EVA Air deal was found by Cheapflights users on 2/4. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/233:21 pmSTL - BKK
2 stops30h 24mMultiple Airlines
Sun 3/22:15 amBKK - STL
2 stops29h 41mMultiple Airlines
Deal found 2/4$1,280
This Korean Air deal was found by Cheapflights users on 2/4. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1811:23 amSTL - BKK
2 stops24h 17mKorean Air
Fri 5/211:30 pmBKK - STL
2 stops34h 18mKorean Air
Deal found 2/4$1,340
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/256:00 amSTL - BKK
2 stops30h 45mDelta
Thu 3/271:00 amBKK - STL
2 stops27h 48mDelta
Deal found 2/4$1,419
This Gurufare deal was found by Cheapflights users on 2/4. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/46:13 pmSTL - BKK
2 stops47h 17mFinnair
Thu 7/177:05 amBKK - STL
2 stops28h 10mFinnair
Deal found 2/4$1,434
This Ovago deal was found by Cheapflights users on 2/4. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/95:44 amSTL - BKK
2 stops44h 41mRoyal Jordanian
Sat 2/151:15 amBKK - STL
2 stops33h 48mRoyal Jordanian
Deal found 2/4$1,830
This Mytrip deal was found by Cheapflights users on 2/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/89:44 amSTL - BKK
3 stops31h 31mAir Canada
Mon 2/108:35 amBKK - STL
2 stops43h 31mAir Canada
Deal found 2/4$1,887
This FlightHub deal was found by Cheapflights users on 2/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:05 amSTL - BKK
2 stops25h 20mAsiana Airlines
Thu 11/1311:55 pmBKK - STL
2 stops37h 32mAsiana Airlines
Deal found 2/4$5,360

Find flights from St. Louis to Bangkok within your budget

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 February 4, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/24

6:10 am-10:35 pm

2 stops27h 25m

Bangkok Suvarnabhumi

Mon 3/3

6:40 am-6:05 pm

2 stops24h 25m

$1,113

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 2/22

7:04 am-5:05 am

2 stops33h 01m

Bangkok Suvarnabhumi

Mon 3/3

8:05 am-11:08 pm

2 stops28h 03m

$1,152

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 2/22

7:00 am-12:05 am

2 stops28h 05m

Bangkok Suvarnabhumi

Mon 3/3

7:10 am-6:56 pm

2 stops24h 46m

$1,155

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 2/23

3:21 pm-10:45 am

2 stops30h 24m

Bangkok Suvarnabhumi

Sun 3/2

2:15 am-6:56 pm

2 stops29h 41m

$1,280

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/7

6:44 am-6:15 am

2 stops35h 31m

Bangkok Suvarnabhumi

Mon 4/28

9:05 am-5:37 pm

2 stops44h 32m

$1,282

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 2/28

6:00 am-9:30 pm

2 stops26h 30m

Bangkok Suvarnabhumi

Fri 3/7

9:30 pm-10:17 pm

2 stops37h 47m

$1,340

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 3/25

6:00 am-12:45 am

2 stops30h 45m

Bangkok Suvarnabhumi

Thu 3/27

1:00 am-4:48 pm

2 stops27h 48m

$1,419

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 7/4

6:13 pm-5:30 am

2 stops47h 17m

Bangkok Suvarnabhumi

Thu 7/17

7:05 am-11:15 pm

2 stops28h 10m

$1,434

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 6/2

7:30 am-4:35 am

2 stops33h 05m

Bangkok Suvarnabhumi

Tue 7/1

1:10 am-8:00 pm

2 stops54h 50m

$1,944

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 3/30

6:44 am-6:15 am

2 stops35h 31m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 13 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.

Travel insights for flights from St. Louis to Bangkok

Get recent, data-driven insights about flights from St. Louis to Bangkok including ideal travel times, pricing trends, and more.

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 January 31, 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, October is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $996). Flying from St. Louis to Bangkok in June is currently the most expensive (average of $1,585). 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 February 4, 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 February 4, 2025.
Korean Air
8.4
Very good
1,040 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

David,Dec 2024

JFK - MCO

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Korean Air
8.4
Very good
1,040 reviews
Korean Air
8.4
Very good
1,040 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

David,Dec 2024

JFK - MCO

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

ANA
8.4
Very good
836 reviews
Korean Air
8.4
Very good
1,040 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

David,Dec 2024

JFK - MCO

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Japan Airlines
8.3
Very good
1,440 reviews
Korean Air
8.4
Very good
1,040 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

David,Dec 2024

JFK - MCO

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Alaska Airlines
8.0
Very good
9,680 reviews
Korean Air
8.4
Very good
1,040 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

David,Dec 2024

JFK - MCO

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Delta
8.0
Very good
8,415 reviews
Korean Air
8.4
Very good
1,040 reviews

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

David,Dec 2024

JFK - MCO

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

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 10 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 $1,113. Other airlines that can offer you cheap pricing are Japan Airlines, from $1,152, and United Airlines, from $1,155. Cathay Pacific is priced at 25% 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, October is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $996). Flying from St. Louis to Bangkok in June is currently the most expensive (average of $1,585). 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 February 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$244Average$1,197FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$1,080Average$1,196FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$1,113Average$1,172FlexibilityNo cancel feeOn-time69%
ANACheapest$1,125Average$1,380FlexibilityNo cancel feeOn-time80%
DeltaCheapest$1,149Average$1,329FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$1,158Average$1,368FlexibilityNo cancel feeOn-time77%
FinnairCheapest$1,249Average$1,674FlexibilityNo cancel feeOn-time76%
Cathay PacificCheapest$1,265Average$1,472FlexibilityNo cancel feeOn-time72%
Qatar AirwaysCheapest$1,311Average$1,380FlexibilityNo cancel feeOn-time68%
KLMCheapest$1,783Average$1,855FlexibilityNo cancel feeOn-time75%
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