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Suvarnabhumi

$382+ Cheap flights from St. Louis (STL) to Suvarnabhumi (BKK)

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 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Bangkok Suvarnabhumi 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 Suvarnabhumi

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Suvarnabhumi (BKK). 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 September 17, 2025.

Round-trip from

$982
(FlightHub)

One-way from

$382
(Trip.com)

Popular in

July

Cheapest in

October

Average price

$1,220
From Lambert-St Louis to Bangkok Suvarnabhumi
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One-way flight from Lambert-St Louis to Bangkok Suvarnabhumi
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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 Suvarnabhumi

Cheapest flights from St. Louis to Suvarnabhumi
Explore the most affordable flight options available from St. Louis to Suvarnabhumi. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/228:50 amSTL - BKK
2 stops26h 10mAmerican Airlines
Thu 9/258:05 amBKK - STL
2 stops26h 18mAmerican Airlines
Deal found 9/16$940
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.
Tue 9/167:40 amSTL - BKK
2 stops29h 25mDelta
Mon 9/222:35 amBKK - STL
2 stops32h 34mDelta
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.
Mon 9/158:10 amSTL - BKK
2 stops32h 25mANA
Sun 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.
Mon 12/296:00 amSTL - BKK
2 stops34h 10mUnited Airlines
Thu 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.
Thu 11/131:35 pmSTL - BKK
3 stops32h 50mUnited Airlines
Mon 11/244:55 pmBKK - STL
3 stops32h 44mUnited Airlines
Deal found 9/15$998
This United Airlines deal was found by Cheapflights users on 9/17. 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 11/55:29 pmSTL - BKK
2 stops28h 56mUnited Airlines
Wed 11/194:55 pmBKK - STL
3 stops30h 56mUnited Airlines
Deal found 9/17$1,007
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.
Tue 10/213:57 pmSTL - BKK
2 stops36h 23mChina Airlines
Tue 10/2810:55 amBKK - STL
2 stops40h 23mChina Airlines
Deal found 9/15$1,022
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/226:30 pmSTL - BKK
2 stops27h 15mChina Airlines
Wed 9/242:40 amBKK - STL
2 stops57h 19mChina Airlines
Deal found 9/16$1,025
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/246:01 amSTL - BKK
2 stops29h 24mDelta
Sun 9/2811:30 pmBKK - STL
2 stops35h 39mDelta
Deal found 9/14$1,029
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.
Mon 9/229:17 amSTL - BKK
2 stops31h 18mUnited Airlines
Thu 9/259:35 amBKK - STL
3 stops48h 25mUnited Airlines
Deal found 9/16$1,049
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.
Sun 9/286:00 amSTL - BKK
2 stops40h 50mEVA Air
Wed 10/14:45 pmBKK - STL
2 stops43h 14mEVA Air
Deal found 9/14$1,055
This oojo deal was found by Cheapflights users on 9/17. 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.
Wed 11/57:00 amSTL - BKK
2 stops39h 30mEVA Air
Wed 11/192:40 pmBKK - STL
2 stops37h 38mEVA Air
Deal found 9/17$1,057

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Suvarnabhumi 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 September 17, 2025.
Use the filters below to find and compare flights from St. Louis to Bangkok Suvarnabhumi Airport that are best for you.

Fly from

St. Louis

Fly to

Suvarnabhumi

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 11/5

4:55 pm-11:25 am

3 stops29h 30m

Bangkok Suvarnabhumi

Wed 11/19

4:55 pm-5:39 pm

3 stops37h 44m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 11/13

1:35 pm-11:25 am

3 stops32h 50m

Bangkok Suvarnabhumi

Mon 11/24

4:55 pm-12:39 pm

3 stops32h 44m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/24

6:01 am-11:25 pm

2 stops29h 24m

Bangkok Suvarnabhumi

Sun 9/28

11:30 pm-11:09 pm

2 stops35h 39m

$1,029

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 9/22

9:17 am-4:35 am

2 stops31h 18m

Bangkok Suvarnabhumi

Thu 9/25

9:35 am-10:00 pm

3 stops48h 25m

$1,049

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 9/28

6:00 am-10:50 am

2 stops40h 50m

Bangkok Suvarnabhumi

Wed 10/1

4:45 pm-11:59 pm

2 stops43h 14m

$1,055

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 11/5

7:00 am-11:30 am

2 stops39h 30m

Bangkok Suvarnabhumi

Wed 11/19

2:40 pm-3:18 pm

2 stops37h 38m

$1,057

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 11/7

7:45 pm-9:25 pm

3 stops36h 40m

$382

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 9/27

4:58 pm-9:10 pm

3 stops40h 12m

$470

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 1/8

12:20 pm-10:05 pm

3 stops44h 45m

$591

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 12/29

7:03 pm-12:45 am

2 stops40h 42m

$638

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 12 results
1
2

Best time to book a flight from St. Louis to Suvarnabhumi

Have a flexible travel schedule? Discover the best time to fly to Suvarnabhumi 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 Suvarnabhumi Airport

How far ahead should I book a flight from St. Louis to Bangkok Suvarnabhumi Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Suvarnabhumi. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Bangkok Suvarnabhumi Airport, you should look to book at least 60 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from St. Louis to Bangkok Suvarnabhumi Airport?

Currently, September is the cheapest month in which you can book a flight from St. Louis to Bangkok Suvarnabhumi Airport (average of $900). Flying from St. Louis to Bangkok Suvarnabhumi Airport 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 Suvarnabhumi. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

It’s typically best to fly out from St. Louis to Bangkok Suvarnabhumi Airport 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 Suvarnabhumi Airport?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Suvarnabhumi. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their St. Louis to Bangkok Suvarnabhumi Airport 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 Suvarnabhumi Airport?

Reviews of airlines servicing Suvarnabhumi

Get insights into the airlines that provide service to Suvarnabhumi. 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 Suvarnabhumi. Reviews last updated September 17, 2025.
Peruse reviews from past customers who have flown with ANA, Japan Airlines, and Delta from St. Louis to Bangkok Suvarnabhumi Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
964 reviews

Boarding

8.6

Comfort

8.2

Overall

8.4

Entertainment

7.9

Crew

8.7

Food

7.7

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
964 reviews
ANA
8.4
Very good
964 reviews

Boarding

8.6

Comfort

8.2

Overall

8.4

Entertainment

7.9

Crew

8.7

Food

7.7

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
964 reviews

Boarding

8.6

Comfort

8.2

Overall

8.4

Entertainment

7.9

Crew

8.7

Food

7.7

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
7,961 reviews
ANA
8.4
Very good
964 reviews

Boarding

8.6

Comfort

8.2

Overall

8.4

Entertainment

7.9

Crew

8.7

Food

7.7

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
998 reviews
ANA
8.4
Very good
964 reviews

Boarding

8.6

Comfort

8.2

Overall

8.4

Entertainment

7.9

Crew

8.7

Food

7.7

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
8,926 reviews
ANA
8.4
Very good
964 reviews

Boarding

8.6

Comfort

8.2

Overall

8.4

Entertainment

7.9

Crew

8.7

Food

7.7

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 Suvarnabhumi. 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 Suvarnabhumi?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Bangkok Suvarnabhumi from St. Louis. Booking flights from Lambert-St Louis (STL) to Bangkok Suvarnabhumi should be relatively easy as there are 0 daily outbound flights to Bangkok Suvarnabhumi from 9 different airlines.

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

    United Airlines can get you from St. Louis to Bangkok Suvarnabhumi Airport in just under 29h 30m. Your travel time can differ by up to . The distance between St. Louis and Bangkok Suvarnabhumi Airport is about 8737 mi.

  • What are the cheapest airlines flying from St. Louis to Bangkok Suvarnabhumi Airport round-trip?

    Qatar Airways, at $897, was found to be the cheapest airline from St. Louis to Bangkok Suvarnabhumi Airport.Alternate airlines to your destination round-trip include American Airlines and Japan Airlines. You may be able to fly from St. Louis to Bangkok Suvarnabhumi Airport for 30% less than the average price by searching for these airlines.

  • Can I find deals for flights from St. Louis to Suvarnabhumi that include hotel bookings?

    Yes. In addition to deals on St. Louis to Suvarnabhumi flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Suvarnabhumi?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Suvarnabhumi.

  • Can I find deals for business class flights from St. Louis to Suvarnabhumi?

    Yes. Cheapflights offers flight deals from St. Louis to Suvarnabhumi 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 Suvarnabhumi Airport?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Bangkok Suvarnabhumi Airport (average of $900). Flying from St. Louis to Bangkok Suvarnabhumi Airport 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

Traveling to a place near Bangkok Suvarnabhumi Airport?

Book flights to Bangkok Suvarnabhumi Airport if you plan to visit one of these locations
Sattahip
Kanchanaburi
Chonburi
Cha-am
Ko Samet
Pak Chong
Phetchaburi
Ko Lan

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.

Alternative routes for St. Louis to Suvarnabhumi

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Suvarnabhumi flights
Springfield to Suvarnabhumi flights
Kansas City to Don Mueang Intl flights

Top 9 airlines flying from St. Louis to Suvarnabhumi

Discover the top 9 airlines that operate flights from St. Louis to Suvarnabhumi. 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 September 17, 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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