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$533+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$978
(Delta)

One-way from

$533
(FlightHub)

Popular in

December

Cheapest in

October

Average price

$1,558
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. 3% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Delta deal was found by Cheapflights users on 6/12. 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.
mié. 7/306:00 amSTL - BKK
2 stops27h 45mDelta
mar. 9/22:35 amBKK - STL
2 stops30h 41mDelta
Deal found 6/12$978
This Gurufare deal was found by Cheapflights users on 6/12. 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.
jue. 8/289:17 amSTL - BKK
2 stops31h 18mANA
mié. 9/39:35 pmBKK - STL
2 stops28h 44mANA
Deal found 6/12$980
This Fareboom deal was found by Cheapflights users on 6/11. 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.
jue. 11/277:00 amSTL - BKK
2 stops26h 30mMultiple Airlines
jue. 12/48:05 amBKK - STL
2 stops28h 51mMultiple Airlines
Deal found 6/11$987
This United Airlines deal was found by Cheapflights users on 6/11. 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.
jue. 11/271:35 pmSTL - BKK
3 stops32h 15mUnited Airlines
jue. 12/47:10 amBKK - STL
2 stops27h 00mUnited Airlines
Deal found 6/11$990
This oojo deal was found by Cheapflights users on 6/12. 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.
lun. 10/66:33 amSTL - BKK
2 stops41h 37mChina Airlines
lun. 11/32:35 amBKK - STL
2 stops49h 30mChina Airlines
Deal found 6/12$1,018
This Delta deal was found by Cheapflights users on 6/12. 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.
mar. 11/181:30 pmSTL - HKT
2 stops43h 10mDelta
mié. 12/311:20 pmHKT - STL
2 stops37h 19mDelta
Deal found 6/12$1,078
This oojo deal was found by Cheapflights users on 6/11. 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.
jue. 11/272:55 pmSTL - BKK
2 stops31h 15mEVA Air
mié. 12/32:15 amBKK - STL
2 stops48h 37mEVA Air
Deal found 6/11$1,097
This FlightHub deal was found by Cheapflights users on 6/12. 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.
mar. 11/187:00 amSTL - HKT
2 stops40h 55mQatar Airways
mar. 12/212:50 amHKT - STL
2 stops36h 06mQatar Airways
Deal found 6/12$1,189
This United deal was found by Cheapflights users on 6/10. 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.
mar. 7/86:00 amSTL - CNX
2 stops40h 25mMultiple Airlines
mar. 7/1511:35 amCNX - STL
2 stops53h 19mMultiple Airlines
Deal found 6/10$1,289
This Expedia deal was found by Cheapflights users on 6/9. 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.
jue. 11/206:30 amSTL - HKT
2 stops26h 10mKorean Air
jue. 11/2711:20 pmHKT - STL
2 stops36h 42mKorean Air
Deal found 6/9$1,294
This Ovago deal was found by Cheapflights users on 6/11. 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.
vie. 11/2111:20 amSTL - HKT
2 stops41h 15mCathay Pacific
jue. 11/2712:20 pmHKT - STL
2 stops44h 40mCathay Pacific
Deal found 6/11$1,455
This FlightHub deal was found by Cheapflights users on 6/10. 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.
sáb. 6/1411:17 amSTL - BKK
2 stops25h 48mKorean Air
lun. 6/169:40 pmBKK - STL
2 stops37h 42mKorean Air
Deal found 6/10$1,470

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 junio 12, 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

mié. 7/30

6:00 am-9:45 pm

2 stops27h 45m

Bangkok Suvarnabhumi

mar. 9/2

2:35 am-9:16 pm

2 stops30h 41m

$978

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

jue. 8/28

9:17 am-4:35 am

2 stops31h 18m

Bangkok Suvarnabhumi

mié. 9/3

9:35 pm-2:19 pm

2 stops28h 44m

$980

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sáb. 8/2

5:41 pm-4:35 am

2 stops46h 54m

Bangkok Suvarnabhumi

lun. 9/8

9:35 am-4:53 pm

2 stops43h 18m

$1,024

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

lun. 9/8

3:42 pm-10:10 pm

2 stops42h 28m

Phuket City

vie. 9/26

11:25 pm-1:22 am

2 stops37h 57m

$1,118

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

jue. 8/7

7:32 pm-11:20 am

2 stops27h 48m

Bangkok Suvarnabhumi

lun. 8/11

4:45 pm-11:59 pm

2 stops43h 14m

$1,268

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sáb. 8/16

7:32 pm-11:20 am

2 stops27h 48m

Bangkok Suvarnabhumi

lun. 8/18

4:45 pm-2:26 pm

2 stops33h 41m

$1,280

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

mar. 7/8

6:00 am-10:25 am

2 stops40h 25m

Chiang Mai

mar. 7/15

11:35 am-4:54 am

2 stops53h 19m

$1,289

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sáb. 8/2

5:00 am-12:55 pm

2 stops43h 55m

Bangkok Suvarnabhumi

mar. 9/2

2:30 am-10:50 pm

2 stops32h 20m

$1,532

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

mar. 7/1

7:32 pm-10:25 am

2 stops26h 53m

Chiang Mai

vie. 8/1

11:35 am-2:26 pm

2 stops38h 51m

$1,540

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

lun. 7/21

6:41 am-11:40 pm

2 stops28h 59m

Chiang Mai

mar. 7/29

12:45 am-11:59 pm

2 stops35h 14m

$1,545

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 23 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, March is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $953). Flying from St. Louis to Thailand 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 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 junio 12, 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.

Rainfall in Thailand by month

Plan your trip to Thailand by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Thailand 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 Thailand when rainfall is around 0.4 in.

Temperature in Thailand by month

Plan your trip to Thailand by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Thailand, 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 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 junio 12, 2025.
Get a feel of what it's like to fly with EVA Air, Korean Air and Japan Airlines from St. Louis to Thailand by reading reviews from past customers. 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
1,202 reviews

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,088 reviews
EVA Air
8.4
Very good
1,202 reviews

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Japan Airlines
8.3
Very good
1,490 reviews
EVA Air
8.4
Very good
1,202 reviews

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
738 reviews
EVA Air
8.4
Very good
1,202 reviews

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
ANA
8.3
Very good
882 reviews
EVA Air
8.4
Very good
1,202 reviews

Overall

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

Boarding

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.

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

    $533 is the cheapest one-way deal found within the past few days, from Japan Airlines. You may also be able to find cheap deals on ANA and Delta, with prices starting from $534 and $541, 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, March is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $953). Flying from St. Louis to Thailand 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

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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 10 airlines flying from St. Louis to Thailand

Discover the top 10 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,531FlexibilityNo cancel feeOn-time68%
ANACheapest$1,053Average$1,183FlexibilityNo cancel feeOn-time80%
Japan AirlinesCheapest$1,080Average$1,155FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$1,102Average$1,169FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,114Average$1,197FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$1,116Average$1,301FlexibilityNo cancel feeOn-time77%
DeltaCheapest$1,144Average$1,606FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$1,176Average$1,786FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,228Average$1,395FlexibilityNo cancel feeOn-time72%
Korean AirCheapest$1,259Average$1,339FlexibilityNo cancel feeOn-time81%

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