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$528+ 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
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$974
(Ovago)

One-way from

$528
(KAYAK)

Popular in

December

Cheapest in

October

Average price

$1,611
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. 1% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Ovago deal was found by Cheapflights users on 7/2. 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.
Thu 8/286:15 amSTL - BKK
2 stops29h 40mANA
Wed 9/39:35 amBKK - STL
2 stops40h 44mANA
Deal found 7/2$974
This Delta deal was found by Cheapflights users on 7/1. 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 9/18:46 amSTL - BKK
2 stops28h 19mDelta
Sun 9/149:40 pmBKK - STL
2 stops38h 58mDelta
Deal found 7/1$978
This United Airlines deal was found by Cheapflights users on 7/3. 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 10/65:47 pmSTL - BKK
2 stops46h 48mUnited Airlines
Tue 11/49:25 amBKK - STL
2 stops44h 38mUnited Airlines
Deal found 7/3$984
This oojo deal was found by Cheapflights users on 7/1. 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.
Mon 9/16:30 pmSTL - BKK
2 stops29h 40mChina Airlines
Mon 9/292:40 amBKK - STL
2 stops50h 54mChina Airlines
Deal found 7/1$1,001
This Delta deal was found by Cheapflights users on 7/2. 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 9/146:00 pmSTL - HKT
2 stops40h 10mDelta
Sun 9/2111:25 pmHKT - STL
2 stops35h 44mDelta
Deal found 7/2$1,084
This oojo deal was found by Cheapflights users on 7/1. 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.
Mon 10/66:33 amSTL - CNX
2 stops39h 52mEVA Air
Tue 10/2111:35 amCNX - STL
2 stops39h 20mEVA Air
Deal found 7/1$1,115
This FlightHub deal was found by Cheapflights users on 7/1. 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.
Mon 10/66:33 amSTL - HKT
2 stops37h 17mQatar Airways
Tue 10/218:25 pmHKT - STL
2 stops39h 34mQatar Airways
Deal found 7/1$1,185
This Ovago deal was found by Cheapflights users on 7/3. 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 11/116:43 pmSTL - HKT
2 stops57h 27mMultiple Airlines
Tue 11/186:10 pmHKT - STL
2 stops33h 10mMultiple Airlines
Deal found 7/3$1,196
This Korean Air deal was found by Cheapflights users on 7/2. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/198:40 amSTL - CNX
2 stops25h 15mKorean Air
Tue 9/2311:15 pmCNX - STL
2 stops35h 54mKorean Air
Deal found 7/2$1,244
This EVA Air deal was found by Cheapflights users on 7/1. 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 10/65:47 pmSTL - CNX
2 stops28h 38mMultiple Airlines
Tue 10/219:10 pmCNX - STL
3 stops31h 35mMultiple Airlines
Deal found 7/1$1,461
This Gurufare deal was found by Cheapflights users on 7/2. 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.
Sun 9/146:20 amSTL - HKT
2 stops40h 30mCathay Pacific
Sun 9/2112:55 pmHKT - STL
3 stops67h 37mCathay Pacific
Deal found 7/2$1,537
This Gurufare deal was found by Cheapflights users on 7/1. 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.
Mon 10/68:42 amSTL - CNX
3 stops46h 28mCathay Pacific
Tue 10/2111:55 amCNX - STL
3 stops67h 14mCathay Pacific
Deal found 7/1$1,956

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 July 3, 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 8/28

6:15 am-11:55 pm

2 stops29h 40m

Bangkok Suvarnabhumi

Wed 9/3

9:35 am-2:19 pm

2 stops40h 44m

$974

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 9/1

8:46 am-1:05 am

2 stops28h 19m

Bangkok Suvarnabhumi

Sun 9/14

9:40 pm-12:38 am

2 stops38h 58m

$978

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 7/8

6:00 am-4:35 am

2 stops34h 35m

Bangkok Suvarnabhumi

Mon 7/21

7:00 am-4:54 am

2 stops33h 54m

$987

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 9/1

6:30 pm-12:10 pm

2 stops29h 40m

Bangkok Suvarnabhumi

Mon 9/29

2:40 am-5:34 pm

2 stops50h 54m

$1,001

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sun 9/14

6:00 pm-10:10 pm

2 stops40h 10m

Phuket City

Sun 9/21

11:25 pm-11:09 pm

2 stops35h 44m

$1,084

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/21

6:00 am-11:10 pm

2 stops29h 10m

Bangkok Suvarnabhumi

Fri 8/22

1:20 am-5:34 pm

2 stops52h 14m

$1,195

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 9/19

8:40 am-9:55 pm

2 stops25h 15m

Chiang Mai

Tue 9/23

11:15 pm-11:09 pm

2 stops35h 54m

$1,244

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Fri 9/12

9:46 am-6:50 pm

2 stops45h 04m

Phuket City

Fri 9/19

8:25 pm-2:41 pm

2 stops54h 16m

$1,247

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sat 8/16

3:24 pm-10:25 am

2 stops31h 01m

Chiang Mai

Sat 8/23

11:35 am-5:34 pm

2 stops41h 59m

$1,312

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sat 8/16

5:41 pm-11:40 pm

2 stops41h 59m

Chiang Mai

Fri 8/22

12:45 am-2:39 pm

2 stops49h 54m

$1,476

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 19 results
1
2

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 $952). Flying from St. Louis to Thailand in December is currently the most expensive (average of $1,573). 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 July 3, 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 July 3, 2025.
See what other customers who have flown with EVA Air, ANA, and Korean Air 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.
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

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
1,215 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

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
8.4
Very good
893 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

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
1,101 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

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
1,505 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

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
744 reviews
EVA Air
8.4
Very good
1,215 reviews

Overall

8.4

Food

8.1

Comfort

8.3

Boarding

8.4

Entertainment

8.0

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?

    $528 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 American Airlines and United Airlines, with prices starting from $546 and $607, 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 $952). Flying from St. Louis to Thailand in December is currently the most expensive (average of $1,573). 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,510FlexibilityNo cancel feeOn-time68%
ANACheapest$1,053Average$1,168FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$1,077Average$1,158FlexibilityNo cancel feeOn-time69%
DeltaCheapest$1,078Average$1,606FlexibilityNo cancel feeOn-timeN/A
Japan AirlinesCheapest$1,080Average$1,147FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$1,114Average$1,197FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$1,116Average$1,301FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$1,176Average$1,786FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,228Average$1,397FlexibilityNo cancel feeOn-time72%
FinnairCheapest$1,289Average$1,456FlexibilityNo cancel feeOn-time76%

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