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$470+ Cheap flights from St. Louis (STL) to Thailand

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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
ago. 26 — sep. 21
mar. 8/26
mar. 9/2
1 adult, Economy
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Cheap flight deals from St. Louis to Thailand

Keep the following information in mind while searching for St. Louis to Thailand flight deals. Data was last updated agosto 21, 2025.

Round-trip from

$928
(Trip.com)

One-way from

$470
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$1,466
From Lambert-St Louis to Thailand
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One-way flight from Lambert-St Louis to Thailand
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Highest demand for flights based on searches. 13% potential increase in price ($199 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from St. Louis to Thailand

Cheapest flights from St. Louis to Thailand
Explore the most affordable flight options available from St. Louis to Thailand. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 21, 2025.

This American Airlines deal was found by Cheapflights users on 8/19. 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.
lun. 9/17:01 amSTL - BKK
2 stops27h 59mAmerican Airlines
lun. 9/88:05 amBKK - STL
2 stops26h 45mAmerican Airlines
Deal found 8/19$888
This American Airlines deal was found by Cheapflights users on 8/19. 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.
lun. 8/255:15 amSTL - BKK
2 stops29h 45mAmerican Airlines
lun. 9/88:05 amBKK - STL
2 stops26h 45mAmerican Airlines
Deal found 8/19$891
This American Airlines deal was found by Cheapflights users on 8/19. 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.
lun. 9/158:50 amSTL - BKK
2 stops26h 10mAmerican Airlines
lun. 9/228:05 amBKK - STL
2 stops26h 45mAmerican Airlines
Deal found 8/19$915
This American Airlines deal was found by Cheapflights users on 8/19. 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.
jue. 8/289:23 amSTL - BKK
2 stops25h 37mAmerican Airlines
mié. 9/38:05 amBKK - STL
2 stops24h 10mAmerican Airlines
Deal found 8/19$940
This Ovago deal was found by Cheapflights users on 8/18. 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.
lun. 9/83:20 pmSTL - BKK
2 stops26h 40mANA
lun. 9/157:00 amBKK - STL
2 stops23h 23mANA
Deal found 8/18$966
This Flysmarter deal was found by Cheapflights users on 8/19. 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.
lun. 8/256:45 amSTL - BKK
2 stops33h 55mJapan Airlines
lun. 9/88:05 amBKK - STL
2 stops26h 54mJapan Airlines
Deal found 8/19$970
This oojo deal was found by Cheapflights users on 8/20. 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.
mié. 10/228:42 amSTL - BKK
2 stops38h 48mCathay Pacific
mié. 10/293:05 pmBKK - STL
2 stops40h 04mCathay Pacific
Deal found 8/20$971
This FlightHub deal was found by Cheapflights users on 8/20. 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.
lun. 11/32:17 pmSTL - BKK
2 stops44h 18mJapan Airlines
jue. 11/208:05 amBKK - STL
2 stops24h 22mJapan Airlines
Deal found 8/20$975
This Delta deal was found by Cheapflights users on 8/20. 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.
jue. 8/218:46 amSTL - BKK
2 stops26h 39mDelta
mié. 8/272:35 amBKK - STL
2 stops34h 03mDelta
Deal found 8/20$978
This FlightHub deal was found by Cheapflights users on 8/20. 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.
lun. 12/18:00 amSTL - BKK
2 stops33h 30mANA
lun. 12/2210:50 pmBKK - STL
2 stops26h 37mANA
Deal found 8/20$982
This Expedia deal was found by Cheapflights users on 8/19. 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.
dom. 9/146:00 amSTL - BKK
2 stops29h 10mMultiple Airlines
mié. 9/171:20 amBKK - STL
2 stops34h 39mMultiple Airlines
Deal found 8/19$989
This oojo deal was found by Cheapflights users on 8/21. 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.
dom. 10/197:16 amSTL - HKT
2 stops39h 34mCathay Pacific
dom. 10/2612:20 pmHKT - STL
2 stops44h 06mCathay Pacific
Deal found 8/21$1,015

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Thailand 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 agosto 21, 2025.
Use the filters below to find and compare flights from St. Louis to Thailand that are best for you.

Fly from

St. Louis

Fly to

Thailand

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 9/1

7:01 am-11:00 pm

2 stops27h 59m

Bangkok Suvarnabhumi

lun. 9/8

8:05 am-10:50 pm

2 stops26h 45m

$888

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 8/25

5:15 am-11:00 pm

2 stops29h 45m

Bangkok Suvarnabhumi

lun. 9/8

8:05 am-10:50 pm

2 stops26h 45m

$891

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 9/15

8:50 am-11:00 pm

2 stops26h 10m

Bangkok Suvarnabhumi

lun. 9/22

8:05 am-10:50 pm

2 stops26h 45m

$915

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

jue. 8/28

9:23 am-11:00 pm

2 stops25h 37m

Bangkok Suvarnabhumi

mié. 9/3

8:05 am-8:15 pm

2 stops24h 10m

$940

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 10/6

8:05 pm-3:10 pm

2 stops31h 05m

Bangkok Suvarnabhumi

mar. 11/4

8:05 am-4:47 pm

2 stops21h 42m

$966

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 9/8

3:20 pm-6:00 am

2 stops26h 40m

Bangkok Suvarnabhumi

lun. 9/15

7:00 am-6:23 pm

2 stops23h 23m

$966

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 8/25

6:45 am-4:40 am

2 stops33h 55m

Bangkok Suvarnabhumi

lun. 9/8

8:05 am-10:59 pm

2 stops26h 54m

$970

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

mié. 10/22

8:42 am-11:30 am

2 stops38h 48m

Bangkok Suvarnabhumi

mié. 10/29

3:05 pm-7:09 pm

2 stops40h 04m

$971

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

lun. 11/3

2:17 pm-11:35 pm

2 stops44h 18m

Bangkok Suvarnabhumi

jue. 11/20

8:05 am-7:27 pm

2 stops24h 22m

$975

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

vie. 10/3

6:20 am-10:50 am

2 stops40h 30m

Phuket City

mié. 10/22

11:50 am-8:26 pm

2 stops44h 36m

$1,015

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 31 results
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Best time to book a flight from St. Louis to Thailand

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

What is the cheapest month to book a flight from St. Louis to Thailand?

Currently, September is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $931). Flying from St. Louis to Thailand in December is currently the most expensive (average of $1,546). 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 TH?

Find hourly flight availability from St. Louis to Thailand. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 21, 2025.

When flying from St. Louis to Thailand, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Thailand

Get insights into the airlines that provide service to Thailand. 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 Thailand. Reviews last updated agosto 21, 2025.
See what other customers who have flown with ANA, Japan Airlines, and Delta from St. Louis to Thailand have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
938 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

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
938 reviews
ANA
8.4
Very good
938 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

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
1,552 reviews
ANA
8.4
Very good
938 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

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
7,981 reviews
ANA
8.4
Very good
938 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

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
974 reviews
ANA
8.4
Very good
938 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

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
8,934 reviews
ANA
8.4
Very good
938 reviews

Overall

8.4

Crew

8.7

Comfort

8.2

Entertainment

7.9

Boarding

8.6

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 Thailand. 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 Thailand?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Thailand. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Thailand?

    For as low as $1,068, American Airlines can have you in Thailand from St. Louis in 27h 55m. There are 8411 mi between St. Louis and Thailand. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from St. Louis to Thailand one-way?

    $496 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Japan Airlines and China Airlines, with prices starting from $2,256 and $3,526, respectively.

  • What are the most popular routes from St. Louis to Thailand?

    The most popular flight routes from St. Louis to Thailand are Lambert-St Louis - Bangkok Suvarnabhumi, Lambert-St Louis - Phuket City and Lambert-St Louis - Chiang Mai.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Thailand 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 Thailand?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $931). Flying from St. Louis to Thailand in December is currently the most expensive (average of $1,546). 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

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Alternative routes for St. Louis to Thailand

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from St. Louis to Thailand

Discover the top 9 airlines that operate flights from St. Louis to Thailand. 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 agosto 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,395FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$954Average$1,278FlexibilityNo cancel feeOn-time71%
ANACheapest$1,053Average$1,186FlexibilityNo cancel feeOn-time80%
DeltaCheapest$1,058Average$1,587FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,067Average$1,163FlexibilityNo cancel feeOn-time69%
Japan AirlinesCheapest$1,080Average$1,155FlexibilityNo cancel feeOn-time79%
Air CanadaCheapest$1,176Average$1,747FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,228Average$1,394FlexibilityNo cancel feeOn-time72%
FinnairCheapest$1,289Average$1,456FlexibilityNo cancel feeOn-time76%

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