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$338+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
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 20, 2025.

This Gurufare deal was found by Cheapflights users on 11/19. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:13 pmSTL - BKK
2 stops28h 02mCathay Pacific
Thu 11/277:55 amBKK - STL
2 stops21h 30mCathay Pacific
Deal found 11/19$989
This oojo deal was found by Cheapflights users on 11/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/298:04 pmSTL - BKK
2 stops39h 11mCathay Pacific
Mon 12/151:05 pmBKK - STL
2 stops23h 52mCathay Pacific
Deal found 11/19$1,020
This FlightHub deal was found by Cheapflights users on 11/20. 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.
Sat 11/298:00 amSTL - BKK
2 stops33h 30mANA
Mon 12/1510:25 pmBKK - STL
2 stops26h 50mANA
Deal found 11/20$1,021
This Ovago deal was found by Cheapflights users on 11/19. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:15 amSTL - BKK
2 stops45h 05mANA
Tue 12/232:20 pmBKK - STL
2 stops39h 26mANA
Deal found 11/19$1,033
This United Airlines deal was found by Cheapflights users on 11/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/298:20 amSTL - BKK
2 stops51h 00mUnited Airlines
Mon 12/154:55 pmBKK - STL
3 stops30h 09mUnited Airlines
Deal found 11/20$1,048
This Ovago deal was found by Cheapflights users on 11/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:30 amSTL - BKK
2 stops35h 00mANA
Wed 11/2610:25 pmBKK - STL
2 stops30h 25mANA
Deal found 11/20$1,056
This United Airlines deal was found by Cheapflights users on 11/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:30 pmSTL - BKK
2 stops28h 55mUnited Airlines
Tue 12/234:55 pmBKK - STL
3 stops37h 59mUnited Airlines
Deal found 11/19$1,070
This oojo deal was found by Cheapflights users on 11/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/234:15 pmSTL - BKK
2 stops28h 35mChina Airlines
Tue 11/252:05 pmBKK - STL
2 stops46h 49mChina Airlines
Deal found 11/19$1,121
This EVA Air deal was found by Cheapflights users on 11/20. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/245:45 amSTL - BKK
2 stops28h 55mMultiple Airlines
Tue 11/252:15 amBKK - STL
2 stops32h 40mMultiple Airlines
Deal found 11/20$1,136
This Delta deal was found by Cheapflights users on 11/18. 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 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
Sun 12/142:05 amBKK - STL
2 stops34h 24mDelta
Deal found 11/18$1,160
This oojo deal was found by Cheapflights users on 11/17. 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 11/268:39 amSTL - HKT
2 stops37h 41mCathay Pacific
Sun 11/3012:20 pmHKT - STL
2 stops47h 14mCathay Pacific
Deal found 11/17$1,479
This Expedia deal was found by Cheapflights users on 11/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/224:15 pmSTL - CNX
2 stops29h 20mMultiple Airlines
Thu 11/2712:15 amCNX - STL
2 stops36h 08mMultiple Airlines
Deal found 11/17$1,830

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 20, 2025.

Round-trip from

$919
(Trip.com)

One-way from

$338
(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. 10% potential increase in price ($142 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 20, 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. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Mon 4/20

6:05 am-10:50 am

2 stops40h 45m

Phuket City

Sun 4/26

6:20 pm-9:48 pm

2 stops39h 28m

$964

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/4

10:07 am-11:25 am

3 stops36h 18m

Bangkok Suvarnabhumi

Mon 2/23

4:55 pm-10:14 pm

3 stops42h 19m

$1,013

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/1

11:25 am-4:35 am

2 stops29h 10m

Bangkok Suvarnabhumi

Thu 4/30

9:35 am-2:18 pm

2 stops40h 43m

$1,023

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 2/1

9:10 am-9:50 am

2 stops35h 40m

Bangkok Suvarnabhumi

Sat 2/28

5:50 pm-10:35 am

2 stops29h 45m

$1,033

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 2/7

10:25 am-9:50 am

2 stops34h 25m

Bangkok Suvarnabhumi

Thu 2/26

2:35 am-7:30 pm

2 stops29h 55m

$1,034

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sun 2/8

6:00 am-11:20 am

2 stops40h 20m

Phuket City

Sun 2/15

6:35 pm-11:30 pm

2 stops41h 55m

$1,036

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/25

11:25 am-5:10 am

2 stops28h 45m

Bangkok Suvarnabhumi

Sun 3/8

4:55 pm-8:55 pm

3 stops40h 00m

$1,039

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 4/16

6:30 am-9:45 am

3 stops39h 15m

Bangkok Suvarnabhumi

Wed 4/22

9:35 am-4:03 pm

2 stops42h 28m

$1,051

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/25

5:55 am-9:50 am

2 stops38h 55m

Bangkok Suvarnabhumi

Sat 3/7

3:35 am-12:30 am

2 stops33h 55m

$1,055

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/1

6:30 pm-12:10 pm

2 stops29h 40m

Bangkok Suvarnabhumi

Thu 4/30

5:30 pm-9:05 pm

2 stops39h 35m

$1,055

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 33 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 20, 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 November 20, 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
1,623 reviews

Crew

8.7

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

NRT - YVR

I had difficulties to get my mileage number registered on my flights. I wasn’t able to put it in at JAL check-in counter or online checking-in. I had to call the customer service in Japan by wasting much time.
Japan Airlines
8.3
Very good
1,623 reviews
Japan Airlines
8.3
Very good
1,623 reviews

Crew

8.7

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

NRT - YVR

I had difficulties to get my mileage number registered on my flights. I wasn’t able to put it in at JAL check-in counter or online checking-in. I had to call the customer service in Japan by wasting much time.
Delta
7.9
Good
8,002 reviews
Japan Airlines
8.3
Very good
1,623 reviews

Crew

8.7

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

NRT - YVR

I had difficulties to get my mileage number registered on my flights. I wasn’t able to put it in at JAL check-in counter or online checking-in. I had to call the customer service in Japan by wasting much time.
Cathay Pacific
7.6
Good
1,062 reviews
Japan Airlines
8.3
Very good
1,623 reviews

Crew

8.7

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

NRT - YVR

I had difficulties to get my mileage number registered on my flights. I wasn’t able to put it in at JAL check-in counter or online checking-in. I had to call the customer service in Japan by wasting much time.
Qatar Airways
7.4
Good
3,664 reviews
Japan Airlines
8.3
Very good
1,623 reviews

Crew

8.7

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

NRT - YVR

I had difficulties to get my mileage number registered on my flights. I wasn’t able to put it in at JAL check-in counter or online checking-in. I had to call the customer service in Japan by wasting much time.
United Airlines
7.4
Good
9,028 reviews
Japan Airlines
8.3
Very good
1,623 reviews

Crew

8.7

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

NRT - YVR

I had difficulties to get my mileage number registered on my flights. I wasn’t able to put it in at JAL check-in counter or online checking-in. I had to call the customer service in Japan by wasting much time.

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 $1,477, Cathay Pacific can have you in Thailand from St. Louis in 29h 49m. There are 9145 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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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 November 20, 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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