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$661+ 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Mar 19 — Mar 261
Wed 3/19
Wed 3/26
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 March 14, 2025.

Round-trip from

$1,044
(Booking.com)

One-way from

$661
(United)

Popular in

December

Cheapest in

February

Average price

$1,341
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. 0% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($41 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 14, 2025.

This FlightHub deal was found by Cheapflights users on 3/13. 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.
Sun 10/192:49 pmSTL - HKT
2 stops40h 01mQatar Airways
Sun 10/269:05 amHKT - STL
2 stops46h 56mQatar Airways
Deal found 3/13$1,032
This FlightHub deal was found by Cheapflights users on 3/13. 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.
Tue 9/304:40 pmSTL - BKK
2 stops25h 35mQatar Airways
Tue 10/78:00 pmBKK - STL
2 stops39h 25mQatar Airways
Deal found 3/13$1,040
This Gurufare deal was found by Cheapflights users on 3/13. 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 8/288:00 amSTL - BKK
2 stops32h 35mANA
Wed 9/39:35 pmBKK - STL
2 stops31h 00mANA
Deal found 3/13$1,090
This Gurufare deal was found by Cheapflights users on 3/12. 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.
Tue 9/237:00 amSTL - BKK
2 stops33h 40mJapan Airlines
Thu 10/168:05 amBKK - STL
2 stops23h 56mJapan Airlines
Deal found 3/12$1,100
This Delta deal was found by Cheapflights users on 3/13. 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 9/293:30 pmSTL - BKK
2 stops42h 15mDelta
Mon 10/69:50 amBKK - STL
2 stops26h 48mDelta
Deal found 3/13$1,104
This United Airlines deal was found by Cheapflights users on 3/13. 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.
Wed 4/238:48 amSTL - BKK
2 stops27h 07mUnited Airlines
Wed 5/149:35 amBKK - STL
2 stops48h 28mUnited Airlines
Deal found 3/13$1,114
This Expedia deal was found by Cheapflights users on 3/13. 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.
Wed 5/76:30 amSTL - CNX
2 stops39h 55mMultiple Airlines
Wed 5/1411:35 amCNX - STL
2 stops38h 32mMultiple Airlines
Deal found 3/13$1,175
This Orbitz deal was found by Cheapflights users on 3/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/13:11 pmSTL - BKK
2 stops31h 14mMultiple Airlines
Mon 5/54:45 pmBKK - STL
2 stops33h 23mMultiple Airlines
Deal found 3/13$1,235
This Priceline deal was found by Cheapflights users on 3/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/99:39 amSTL - BKK
2 stops31h 36mAir Canada
Wed 5/147:35 amBKK - STL
2 stops24h 23mAir Canada
Deal found 3/13$1,274
This Korean Air deal was found by Cheapflights users on 3/13. 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.
Sat 9/278:55 amSTL - BKK
2 stops40h 20mKorean Air
Wed 10/82:35 amBKK - STL
2 stops30h 56mKorean Air
Deal found 3/13$1,300
This Gurufare deal was found by Cheapflights users on 3/13. 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 4/76:15 amSTL - BKK
2 stops29h 35mCathay Pacific
Mon 4/2811:00 amBKK - STL
2 stops23h 28mCathay Pacific
Deal found 3/13$1,357
This Ovago deal was found by Cheapflights users on 3/13. 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 6/210:36 amSTL - BKK
2 stops54h 54mFinnair
Wed 7/27:05 amBKK - STL
2 stops28h 47mFinnair
Deal found 3/13$1,557

Find flights from St. Louis to Thailand within your budget

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 March 14, 2025.

Fly from

St. Louis

Fly to

Thailand

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 9/9

7:00 am-7:20 am

2 stops36h 20m

Bangkok Suvarnabhumi

Tue 9/23

8:00 pm-11:56 pm

2 stops39h 56m

$1,044

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/28

8:00 am-4:35 am

2 stops32h 35m

Bangkok Suvarnabhumi

Wed 9/3

9:35 pm-4:35 pm

2 stops31h 00m

$1,090

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/23

8:48 am-11:55 pm

2 stops27h 07m

Bangkok Suvarnabhumi

Wed 5/14

9:35 am-10:03 pm

2 stops48h 28m

$1,114

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/2

6:15 am-11:00 pm

2 stops28h 45m

Bangkok Suvarnabhumi

Tue 5/27

8:05 am-11:04 pm

2 stops26h 59m

$1,137

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Wed 5/7

6:30 am-10:25 am

2 stops39h 55m

Chiang Mai

Wed 5/14

11:35 am-2:07 pm

2 stops38h 32m

$1,175

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 4/1

3:11 pm-10:25 am

2 stops31h 14m

Bangkok Suvarnabhumi

Mon 5/5

4:45 pm-2:08 pm

2 stops33h 23m

$1,235

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/9

9:39 am-5:15 am

2 stops31h 36m

Bangkok Suvarnabhumi

Wed 5/14

7:35 am-7:58 pm

2 stops24h 23m

$1,274

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/7

6:15 am-11:50 pm

2 stops29h 35m

Bangkok Suvarnabhumi

Mon 4/28

11:00 am-10:28 pm

2 stops23h 28m

$1,357

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 6/2

10:36 am-5:30 am

2 stops54h 54m

Bangkok Suvarnabhumi

Wed 7/2

7:05 am-11:52 pm

2 stops28h 47m

$1,557

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 3/29

6:00 am-11:40 pm

2 stops29h 40m

Bangkok Suvarnabhumi

Sun 4/20

11:30 pm-11:34 pm

2 stops36h 04m

$1,575

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 17 results
1
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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.

Travel insights for flights from St. Louis to Thailand

Get recent, data-driven insights about flights from St. Louis to Thailand including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Thailand?

Currently, February is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $968). Flying from St. Louis to Thailand in June is currently the most expensive (average of $1,577). 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 March 14, 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 March 14, 2025.
Get a feel of what it's like to fly with Korean Air, ANA 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.
Korean Air
8.4
Very good
1,047 reviews

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Korean Air
8.4
Very good
1,047 reviews
Korean Air
8.4
Very good
1,047 reviews

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

ANA
8.4
Very good
829 reviews
Korean Air
8.4
Very good
1,047 reviews

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Japan Airlines
8.3
Very good
1,437 reviews
Korean Air
8.4
Very good
1,047 reviews

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Alaska Airlines
8.0
Very good
9,734 reviews
Korean Air
8.4
Very good
1,047 reviews

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Emirates
8.0
Very good
3,202 reviews
Korean Air
8.4
Very good
1,047 reviews

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Entertainment

8.2

Reviews

1 / 20

10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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?

    $661 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Korean Air and Alaska Airlines, with prices starting from $724 and $1,584, 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 - 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, February is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $968). Flying from St. Louis to Thailand in June is currently the most expensive (average of $1,577). 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 March 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest$1,080Average$1,183FlexibilityNo cancel feeOn-time79%
DeltaCheapest$1,104Average$1,665FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,113Average$1,158FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,114Average$1,197FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$1,116Average$1,320FlexibilityNo cancel feeOn-time77%
ANACheapest$1,125Average$1,254FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$1,176Average$1,747FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,265Average$1,479FlexibilityNo cancel feeOn-time72%
Qatar AirwaysCheapest$1,272Average$1,577FlexibilityNo cancel feeOn-time68%
FinnairCheapest$1,289Average$1,542FlexibilityNo cancel feeOn-time76%
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