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$474+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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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 October 27, 2025.

This lastminute.com deal was found by Cheapflights users on 10/25. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:00 amSTL - BKK
2 stops28h 15mCathay Pacific
Wed 12/37:15 pmBKK - STL
2 stops41h 42mCathay Pacific
Deal found 10/25$962
This SmartFares deal was found by Cheapflights users on 10/24. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:00 amSTL - BKK
2 stops41h 35mMultiple Airlines
Thu 10/305:40 pmBKK - STL
2 stops57h 38mMultiple Airlines
Deal found 10/24$963
This Delta deal was found by Cheapflights users on 10/24. 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 12/16:40 amSTL - BKK
2 stops29h 05mDelta
Mon 12/229:30 pmBKK - STL
2 stops37h 46mDelta
Deal found 10/24$978
This oojo deal was found by Cheapflights users on 10/25. 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 11/137:00 amSTL - BKK
2 stops28h 15mCathay Pacific
Mon 11/244:55 pmBKK - STL
2 stops39h 32mCathay Pacific
Deal found 10/25$988
This Delta deal was found by Cheapflights users on 10/25. 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 11/176:40 amSTL - BKK
2 stops29h 15mDelta
Tue 12/22:05 amBKK - STL
2 stops34h 24mDelta
Deal found 10/25$1,003
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Tue 11/259:00 amSTL - BKK
3 stops37h 25mUnited Airlines
Tue 12/24:55 pmBKK - STL
2 stops36h 32mUnited Airlines
Deal found 10/26$1,006
This oojo deal was found by Cheapflights users on 10/26. 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 11/298:39 amSTL - BKK
2 stops26h 36mCathay Pacific
Mon 12/1511:40 amBKK - STL
2 stops25h 17mCathay Pacific
Deal found 10/26$1,024
This oojo deal was found by Cheapflights users on 10/26. 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 11/18:00 pmSTL - BKK
2 stops55h 55mCathay Pacific
Thu 11/137:55 amBKK - STL
2 stops28h 47mCathay Pacific
Deal found 10/26$1,030
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Sat 11/15:29 pmSTL - BKK
2 stops29h 56mUnited Airlines
Thu 11/134:55 pmBKK - STL
3 stops35h 55mUnited Airlines
Deal found 10/26$1,046
This oojo deal was found by Cheapflights users on 10/26. 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 11/258:39 amSTL - BKK
2 stops26h 36mCathay Pacific
Tue 12/23:05 pmBKK - STL
2 stops45h 52mCathay Pacific
Deal found 10/26$1,049
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/1711:05 amSTL - BKK
3 stops35h 20mUnited Airlines
Wed 12/34:55 pmBKK - STL
3 stops30h 09mUnited Airlines
Deal found 10/25$1,050
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/135:29 pmSTL - BKK
2 stops52h 56mUnited Airlines
Mon 11/244:55 pmBKK - STL
3 stops38h 52mUnited Airlines
Deal found 10/25$1,056

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 October 27, 2025.

Round-trip from

$942
(Ovago)

One-way from

$474
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$1,119
From Lambert-St Louis to Thailand
Search Deals
One-way flight from Lambert-St Louis to Thailand
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($133 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 27, 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

Thu 4/23

6:30 am-11:50 pm

2 stops29h 20m

Bangkok Suvarnabhumi

Mon 4/27

7:00 pm-9:48 pm

2 stops38h 48m

$974

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 3/3

9:55 am-5:10 am

2 stops30h 15m

Bangkok Suvarnabhumi

Tue 3/10

4:55 pm-9:24 am

3 stops28h 29m

$999

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/8

9:30 am-4:35 am

2 stops31h 05m

Bangkok Suvarnabhumi

Wed 4/15

3:40 pm-9:42 am

3 stops30h 02m

$999

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/25

10:15 am-4:45 pm

2 stops41h 30m

Bangkok Suvarnabhumi

Sat 3/7

3:35 am-12:30 am

2 stops33h 55m

$1,002

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 11/17

6:40 am-12:55 am

2 stops29h 15m

Bangkok Suvarnabhumi

Tue 12/2

2:05 am-11:29 pm

2 stops34h 24m

$1,003

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 3/3

6:30 am-12:55 am

2 stops29h 25m

Bangkok Suvarnabhumi

Mon 3/9

2:05 am-11:40 pm

2 stops33h 35m

$1,003

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 1/7

5:00 pm-11:25 am

2 stops53h 25m

Bangkok Suvarnabhumi

Wed 3/4

4:55 pm-3:54 pm

3 stops35h 59m

$1,015

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 3/17

5:25 pm-11:25 am

2 stops54h 00m

Bangkok Suvarnabhumi

Tue 3/31

3:40 pm-10:27 am

3 stops30h 47m

$1,015

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/1

6:30 pm-9:45 am

2 stops51h 15m

Bangkok Suvarnabhumi

Thu 4/30

3:40 pm-8:59 pm

3 stops41h 19m

$1,015

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sat 1/17

11:06 am-5:35 pm

2 stops41h 29m

Phuket City

Sat 1/24

12:20 pm-11:59 pm

2 stops24h 39m

$1,059

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 38 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, August is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $963). Flying from St. Louis to Thailand in June is currently the most expensive (average of $1,263). 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 October 27, 2025.

When flying from St. Louis to Thailand, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 26% versus a flight in the morning.

What is the cheapest day to fly from St. Louis to Thailand?

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

Travelers seeking maximum savings on their St. Louis to Thailand flight should consider departing on Monday at noon 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.

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 October 27, 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
994 reviews

Overall

8.4

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
ANA
8.4
Very good
994 reviews
ANA
8.4
Very good
994 reviews

Overall

8.4

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Japan Airlines
8.3
Very good
1,593 reviews
ANA
8.4
Very good
994 reviews

Overall

8.4

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Delta
7.9
Good
7,996 reviews
ANA
8.4
Very good
994 reviews

Overall

8.4

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Cathay Pacific
7.6
Good
1,042 reviews
ANA
8.4
Very good
994 reviews

Overall

8.4

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
United Airlines
7.4
Good
8,997 reviews
ANA
8.4
Very good
994 reviews

Overall

8.4

Entertainment

7.9

Boarding

8.6

Comfort

8.2

Crew

8.7

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.

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 $974, Cathay Pacific can have you in Thailand from St. Louis in 29h 20m. There are 8737 mi between St. Louis and Thailand. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 - Chiang Mai and Lambert-St Louis - Phuket City.

  • 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, August is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $963). Flying from St. Louis to Thailand in June is currently the most expensive (average of $1,263). 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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,385FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$979Average$1,278FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$985Average$1,152FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$986Average$1,162FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$994Average$1,276FlexibilityNo cancel feeOn-time72%
ANACheapest$1,007Average$1,190FlexibilityNo cancel feeOn-time80%
DeltaCheapest$1,058Average$1,631FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$1,176Average$1,747FlexibilityNo cancel feeOn-time67%
FinnairCheapest$1,289Average$1,456FlexibilityNo cancel feeOn-time76%

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