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$550+ 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Bangkok are usually found in October or February, 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 May 1, 2025.

Round-trip from

$1,095
(Gurufare)

One-way from

$550
(Orbitz)

Popular in

December

Cheapest in

October

Average price

$1,378
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 ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($47 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This oojo deal was found by Cheapflights users on 4/30. 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.
Thu 10/302:55 pmSTL - BKK
2 stops30h 55mChina Airlines
Tue 11/42:05 pmBKK - STL
2 stops46h 51mChina Airlines
Deal found 4/30$1,094
This Gurufare deal was found by Cheapflights users on 4/30. 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 8/289:17 amSTL - BKK
2 stops32h 43mANA
Wed 9/39:35 pmBKK - STL
2 stops28h 51mANA
Deal found 4/30$1,095
This Delta deal was found by Cheapflights users on 4/30. 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.
Mon 9/293:30 pmSTL - BKK
2 stops43h 55mDelta
Wed 10/159:40 pmBKK - STL
2 stops46h 30mDelta
Deal found 4/30$1,105
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Sun 9/285:43 pmSTL - BKK
2 stops46h 52mUnited Airlines
Wed 10/159:35 amBKK - STL
2 stops44h 38mUnited Airlines
Deal found 4/30$1,111
This Expedia deal was found by Cheapflights users on 4/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:00 amSTL - BKK
2 stops36h 55mMultiple Airlines
Sat 9/279:05 pmBKK - STL
2 stops38h 54mMultiple Airlines
Deal found 4/30$1,117
This Trip.com deal was found by Cheapflights users on 4/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:00 amSTL - BKK
2 stops36h 55mQatar Airways
Fri 10/317:35 amBKK - STL
2 stops52h 21mQatar Airways
Deal found 4/30$1,154
This FlightHub deal was found by Cheapflights users on 4/30. 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.
Fri 8/298:26 amSTL - BKK
2 stops33h 24mJapan Airlines
Fri 9/1212:25 amBKK - STL
2 stops34h 34mJapan Airlines
Deal found 4/30$1,178
This oojo deal was found by Cheapflights users on 4/29. 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.
Sun 5/43:29 pmSTL - BKK
2 stops44h 21mCathay Pacific
Thu 5/88:05 amBKK - STL
2 stops26h 40mCathay Pacific
Deal found 4/29$1,204
This oojo deal was found by Cheapflights users on 4/29. 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.
Mon 5/126:30 amSTL - BKK
2 stops40h 25mEVA Air
Mon 6/94:45 pmBKK - STL
2 stops33h 22mEVA Air
Deal found 4/29$1,238
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/36:52 amSTL - BKK
2 stops28h 08mAmerican Airlines
Mon 6/99:45 amBKK - STL
2 stops25h 14mAmerican Airlines
Deal found 4/29$1,636
This Ovago deal was found by Cheapflights users on 4/30. 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 6/110:46 amSTL - BKK
2 stops30h 44mFinnair
Mon 6/307:05 amBKK - STL
2 stops28h 45mFinnair
Deal found 4/30$1,839

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 May 1, 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

Thu 8/28

9:17 am-6:00 am

2 stops32h 43m

Bangkok Suvarnabhumi

Wed 9/3

9:35 pm-2:26 pm

2 stops28h 51m

$1,095

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 9/29

11:51 am-11:25 pm

2 stops47h 34m

Bangkok Suvarnabhumi

Tue 10/14

2:35 am-8:49 pm

2 stops30h 14m

$1,105

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 9/28

5:43 pm-4:35 am

2 stops46h 52m

Bangkok Suvarnabhumi

Wed 10/15

9:35 am-6:13 pm

2 stops44h 38m

$1,111

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 9/19

6:00 am-6:55 am

2 stops36h 55m

Bangkok Suvarnabhumi

Sat 9/27

9:05 pm-11:59 pm

2 stops38h 54m

$1,117

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 10/1

6:00 am-6:55 am

2 stops36h 55m

Bangkok Suvarnabhumi

Fri 10/31

7:35 am-11:56 pm

2 stops52h 21m

$1,154

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 8/29

8:26 am-5:50 am

2 stops33h 24m

Bangkok Suvarnabhumi

Fri 9/12

12:25 am-10:59 pm

2 stops34h 34m

$1,178

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 10/4

7:00 am-12:10 pm

2 stops41h 10m

Bangkok Suvarnabhumi

Fri 11/21

2:35 am-1:52 pm

2 stops48h 17m

$1,221

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 5/12

6:30 am-10:55 am

2 stops40h 25m

Bangkok Suvarnabhumi

Mon 6/9

4:45 pm-2:07 pm

2 stops33h 22m

$1,238

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 7/7

7:23 am-11:50 pm

2 stops28h 27m

Bangkok Suvarnabhumi

Mon 7/21

7:00 pm-8:19 pm

2 stops37h 19m

$1,388

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 6/3

6:52 am-11:00 pm

2 stops28h 08m

Bangkok Suvarnabhumi

Mon 6/9

9:45 am-10:59 pm

2 stops25h 14m

$1,636

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 21 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 April 25, 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 $955). 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 May 1, 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 May 1, 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
1,186 reviews

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
EVA Air
8.4
Very good
1,186 reviews
EVA Air
8.4
Very good
1,186 reviews

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Japan Airlines
8.3
Very good
1,464 reviews
EVA Air
8.4
Very good
1,186 reviews

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
China Airlines
8.3
Very good
732 reviews
EVA Air
8.4
Very good
1,186 reviews

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
ANA
8.3
Very good
852 reviews
EVA Air
8.4
Very good
1,186 reviews

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Emirates
8.0
Very good
3,216 reviews
EVA Air
8.4
Very good
1,186 reviews

Comfort

8.3

Entertainment

8.0

Overall

8.4

Boarding

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

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 $1,095. Other airlines that can offer you cheap pricing are Delta, from $1,105, and United Airlines, from $1,111. ANA is priced at 21% 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 ANA. According to our data, you can fly for as low as $600. Users have also found prices from $609 and $646 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, March is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $955). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest$1,080Average$1,164FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$1,113Average$1,160FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,114Average$1,195FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$1,116Average$1,320FlexibilityNo cancel feeOn-time77%
ANACheapest$1,128Average$1,243FlexibilityNo cancel feeOn-time80%
DeltaCheapest$1,144Average$1,378FlexibilityNo cancel feeOn-timeN/A
Qatar AirwaysCheapest$1,148Average$1,570FlexibilityNo cancel feeOn-time68%
Air CanadaCheapest$1,176Average$1,747FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,234Average$1,401FlexibilityNo cancel feeOn-time72%
Korean AirCheapest$1,259Average$1,339FlexibilityNo cancel feeOn-time81%

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