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$665+ 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
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 November 13, 2025.

This Delta deal was found by Cheapflights users on 11/12. 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.
Mon 12/16:34 amSTL - BKK
2 stops29h 21mDelta
Mon 2/29:40 amBKK - STL
2 stops26h 59mDelta
Deal found 11/12$960
This Delta deal was found by Cheapflights users on 11/12. 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.
Sun 11/307:02 pmSTL - BKK
2 stops40h 53mDelta
Wed 2/49:40 amBKK - STL
2 stops26h 45mDelta
Deal found 11/12$966
This oojo deal was found by Cheapflights users on 11/11. 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.
Sun 11/234:15 pmSTL - BKK
2 stops31h 20mMultiple Airlines
Wed 12/105:40 pmBKK - STL
2 stops43h 19mMultiple Airlines
Deal found 11/11$982
This Cathay Pacific deal was found by Cheapflights users on 11/10. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:00 amSTL - BKK
2 stops28h 15mMultiple Airlines
Tue 11/184:55 pmBKK - STL
2 stops40h 28mMultiple Airlines
Deal found 11/10$986
This Cathay Pacific deal was found by Cheapflights users on 11/11. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:00 amSTL - HKT
2 stops40h 20mMultiple Airlines
Wed 12/36:35 pmHKT - STL
2 stops37h 30mMultiple Airlines
Deal found 11/11$986
This oojo deal was found by Cheapflights users on 11/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:00 amSTL - BKK
2 stops44h 30mMultiple Airlines
Wed 11/195:40 pmBKK - STL
2 stops43h 19mMultiple Airlines
Deal found 11/10$991
This Delta deal was found by Cheapflights users on 11/12. 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.
Sat 11/296:40 amSTL - BKK
2 stops29h 05mDelta
Tue 2/39:40 amBKK - STL
2 stops26h 59mDelta
Deal found 11/12$1,000
This Delta deal was found by Cheapflights users on 11/12. 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.
Fri 11/282:36 pmSTL - BKK
2 stops45h 09mDelta
Sun 2/19:40 amBKK - STL
2 stops43h 59mDelta
Deal found 11/12$1,006
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Sun 11/235:29 pmSTL - BKK
2 stops52h 56mUnited Airlines
Wed 12/104:55 pmBKK - STL
3 stops30h 12mUnited Airlines
Deal found 11/11$1,015
This FlightHub deal was found by Cheapflights users on 11/12. 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.
Thu 11/1311:05 amSTL - BKK
2 stops30h 25mANA
Thu 11/2010:25 pmBKK - STL
2 stops30h 25mANA
Deal found 11/12$1,021
This oojo deal was found by Cheapflights users on 11/12. 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.
Sat 11/294:32 pmSTL - BKK
2 stops42h 43mCathay Pacific
Mon 12/157:55 amBKK - STL
2 stops29h 02mCathay Pacific
Deal found 11/12$1,026
This Delta deal was found by Cheapflights users on 11/12. 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.
Sat 11/296:40 amSTL - BKK
2 stops29h 15mDelta
Fri 1/309:40 amBKK - STL
2 stops26h 45mDelta
Deal found 11/12$1,040

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 November 13, 2025.

Round-trip from

$943
(oojo)

One-way from

$665
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$1,194
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 ($138 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 November 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 November 13, 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

Mon 12/1

6:34 am-12:55 am

2 stops29h 21m

Bangkok Suvarnabhumi

Wed 1/28

12:55 am-8:39 pm

2 stops32h 44m

$960

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Tue 11/18

6:00 am-11:20 am

2 stops40h 20m

Phuket City

Wed 12/3

6:35 pm-7:05 pm

2 stops37h 30m

$986

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 11/28

2:36 pm-12:45 am

2 stops45h 09m

Bangkok Suvarnabhumi

Thu 1/29

9:40 am-11:25 pm

2 stops26h 45m

$1,006

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 2/3

6:00 am-11:35 pm

2 stops28h 35m

Bangkok Suvarnabhumi

Tue 2/17

9:55 am-1:49 pm

2 stops40h 54m

$1,008

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Thu 1/29

7:04 am-11:20 am

2 stops39h 16m

Phuket City

Mon 2/16

6:35 pm-11:21 pm

2 stops41h 46m

$1,009

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Thu 1/29

11:05 am-11:20 am

2 stops35h 15m

Phuket City

Sun 2/15

6:35 pm-10:57 pm

2 stops41h 22m

$1,009

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Tue 2/3

11:05 am-11:20 am

2 stops35h 15m

Phuket City

Tue 2/17

12:20 pm-6:11 pm

2 stops42h 51m

$1,020

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Wed 1/28

7:04 am-5:35 pm

2 stops45h 31m

Phuket City

Sun 2/15

12:20 pm-10:57 pm

2 stops47h 37m

$1,020

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Tue 2/3

11:05 am-11:20 am

2 stops35h 15m

Phuket City

Sun 2/15

12:20 pm-10:57 pm

2 stops47h 37m

$1,020

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sun 2/1

5:20 pm-11:20 am

2 stops29h 00m

Phuket City

Wed 2/18

6:35 pm-6:03 pm

2 stops36h 28m

$1,036

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 36 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 November 13, 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 27% 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 November 13, 2025.
See what other customers who have flown with Japan Airlines, Delta, and Cathay Pacific 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.
Japan Airlines
8.3
Very good
1,613 reviews

Comfort

8.2

Entertainment

7.8

Food

7.7

Boarding

8.4

Crew

8.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

Nymo,Nov 2025

NRT - BKK

It’s great experience overall. Stewards are superb. Every crew member is so pleasant. I’ll fly JAL again.
Japan Airlines
8.3
Very good
1,613 reviews
Japan Airlines
8.3
Very good
1,613 reviews

Comfort

8.2

Entertainment

7.8

Food

7.7

Boarding

8.4

Crew

8.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

Nymo,Nov 2025

NRT - BKK

It’s great experience overall. Stewards are superb. Every crew member is so pleasant. I’ll fly JAL again.
Delta
7.9
Good
8,007 reviews
Japan Airlines
8.3
Very good
1,613 reviews

Comfort

8.2

Entertainment

7.8

Food

7.7

Boarding

8.4

Crew

8.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

Nymo,Nov 2025

NRT - BKK

It’s great experience overall. Stewards are superb. Every crew member is so pleasant. I’ll fly JAL again.
Cathay Pacific
7.6
Good
1,058 reviews
Japan Airlines
8.3
Very good
1,613 reviews

Comfort

8.2

Entertainment

7.8

Food

7.7

Boarding

8.4

Crew

8.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

Nymo,Nov 2025

NRT - BKK

It’s great experience overall. Stewards are superb. Every crew member is so pleasant. I’ll fly JAL again.
Qatar Airways
7.4
Good
3,662 reviews
Japan Airlines
8.3
Very good
1,613 reviews

Comfort

8.2

Entertainment

7.8

Food

7.7

Boarding

8.4

Crew

8.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

Nymo,Nov 2025

NRT - BKK

It’s great experience overall. Stewards are superb. Every crew member is so pleasant. I’ll fly JAL again.
United Airlines
7.4
Good
9,017 reviews
Japan Airlines
8.3
Very good
1,613 reviews

Comfort

8.2

Entertainment

7.8

Food

7.7

Boarding

8.4

Crew

8.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

Nymo,Nov 2025

NRT - BKK

It’s great experience overall. Stewards are superb. Every crew member is so pleasant. I’ll fly JAL again.

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 $1,008, Delta can have you in Thailand from St. Louis in 28h 35m. 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 - 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, 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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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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,385FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$979Average$1,278FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$985Average$1,143FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$986Average$1,167FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$994Average$1,274FlexibilityNo cancel feeOn-time72%
ANACheapest$1,007Average$1,217FlexibilityNo 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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