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$527+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Bangkok are usually found in September 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 July 31, 2025.

Round-trip from

$966
(Gurufare)

One-way from

$527
(KAYAK)

Popular in

December

Cheapest in

September

Average price

$1,656
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. 1% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This Gurufare deal was found by Cheapflights users on 7/31. 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.
Wed 9/247:23 amSTL - BKK
2 stops27h 37mJapan Airlines
Sun 10/59:45 amBKK - STL
2 stops49h 20mJapan Airlines
Deal found 7/31$966
This Flysmarter deal was found by Cheapflights users on 7/31. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/118:25 amSTL - BKK
2 stops33h 35mMultiple Airlines
Wed 8/277:00 amBKK - STL
2 stops23h 58mMultiple Airlines
Deal found 7/31$969
This Gurufare deal was found by Cheapflights users on 7/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/278:10 amSTL - BKK
2 stops32h 25mANA
Wed 9/39:35 pmBKK - STL
2 stops28h 44mANA
Deal found 7/29$975
This Delta deal was found by Cheapflights users on 7/30. 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 12/87:30 amSTL - BKK
2 stops26h 50mDelta
Tue 12/169:30 pmBKK - STL
2 stops28h 50mDelta
Deal found 7/30$978
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 9/246:00 amSTL - BKK
2 stops29h 55mUnited Airlines
Tue 10/79:35 amBKK - STL
2 stops46h 07mUnited Airlines
Deal found 7/30$987
This oojo deal was found by Cheapflights users on 7/31. 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 9/216:30 pmSTL - BKK
2 stops27h 15mChina Airlines
Mon 9/292:40 amBKK - STL
2 stops50h 54mChina Airlines
Deal found 7/31$1,000
This oojo deal was found by Cheapflights users on 7/29. 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.
Sat 10/113:57 pmSTL - BKK
2 stops31h 13mEVA Air
Sat 11/85:10 pmBKK - STL
2 stops35h 08mEVA Air
Deal found 7/29$1,153

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 July 31, 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

Wed 9/24

7:23 am-11:00 pm

2 stops27h 37m

Bangkok Suvarnabhumi

Sun 10/5

9:45 am-11:05 pm

2 stops49h 20m

$966

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 8/11

8:25 am-6:00 am

2 stops33h 35m

Bangkok Suvarnabhumi

Wed 8/27

7:00 am-6:58 pm

2 stops23h 58m

$969

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 8/27

8:10 am-4:35 am

2 stops32h 25m

Bangkok Suvarnabhumi

Wed 9/3

9:35 pm-2:19 pm

2 stops28h 44m

$975

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/28

6:40 am-1:05 am

2 stops30h 25m

Bangkok Suvarnabhumi

Wed 9/3

9:50 am-1:20 pm

2 stops39h 30m

$978

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/24

6:00 am-11:55 pm

2 stops29h 55m

Bangkok Suvarnabhumi

Tue 10/7

9:35 am-7:42 pm

2 stops46h 07m

$987

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 9/21

6:30 pm-9:45 am

2 stops27h 15m

Bangkok Suvarnabhumi

Mon 9/29

2:40 am-5:34 pm

2 stops50h 54m

$1,000

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 10/11

3:57 pm-11:10 am

2 stops31h 13m

Bangkok Suvarnabhumi

Sat 11/8

5:10 pm-3:18 pm

2 stops35h 08m

$1,153

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/24

12:28 pm-6:55 am

2 stops30h 27m

Bangkok Suvarnabhumi

Mon 10/6

2:30 am-8:53 pm

2 stops30h 23m

$1,235

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/3

6:00 am-9:45 pm

2 stops27h 45m

$527

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 8/4

6:14 am-11:00 pm

2 stops28h 46m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 12 results
1
2

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 July 25, 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 $946). Flying from St. Louis to Bangkok in December is currently the most expensive (average of $1,563). 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 July 31, 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 July 31, 2025.
Get a feel of what it's like to fly with EVA Air, ANA, and Japan Airlines 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.
EVA Air
8.4
Very good
1,220 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

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
1,220 reviews
EVA Air
8.4
Very good
1,220 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

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
8.4
Very good
922 reviews
EVA Air
8.4
Very good
1,220 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

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
1,536 reviews
EVA Air
8.4
Very good
1,220 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

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
754 reviews
EVA Air
8.4
Very good
1,220 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

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
7,981 reviews
EVA Air
8.4
Very good
1,220 reviews

Comfort

8.3

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

Entertainment

8.0

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 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 $966. Other airlines that can offer you cheap pricing are ANA, from $975, and Delta, from $978. Japan Airlines is priced at 27% 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 $527. Users have also found prices from $535 and $630 on ANA and United Airlines, 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, September is the cheapest month in which you can book a flight from St. Louis to Bangkok (average of $946). Flying from St. Louis to Bangkok in December is currently the most expensive (average of $1,563). 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

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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,365FlexibilityNo cancel feeOn-time68%
ANACheapest$1,053Average$1,180FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$1,054Average$1,158FlexibilityNo cancel feeOn-time69%
DeltaCheapest$1,058Average$1,631FlexibilityNo cancel feeOn-timeN/A
Japan AirlinesCheapest$1,080Average$1,149FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$1,113Average$1,242FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$1,116Average$1,301FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$1,176Average$1,747FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,228Average$1,397FlexibilityNo cancel feeOn-time72%
FinnairCheapest$1,289Average$1,456FlexibilityNo cancel feeOn-time76%

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