HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Thailand

$382+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Thailand with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 17, 2025.

Round-trip from

$982
(FlightHub)

One-way from

$382
(Trip.com)

Popular in

July

Cheapest in

October

Average price

$1,220
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 ($130 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/228:50 amSTL - BKK
2 stops26h 10mAmerican Airlines
Thu 9/258:05 amBKK - STL
2 stops26h 18mAmerican Airlines
Deal found 9/16$940
This Delta deal was found by Cheapflights users on 9/15. 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.
Tue 9/167:40 amSTL - BKK
2 stops29h 25mDelta
Mon 9/222:35 amBKK - STL
2 stops32h 34mDelta
Deal found 9/15$979
This Delta deal was found by Cheapflights users on 9/15. 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 9/221:26 pmSTL - CNX
2 stops44h 29mDelta
Wed 10/111:15 pmCNX - STL
2 stops37h 23mDelta
Deal found 9/15$979
This FlightHub deal was found by Cheapflights users on 9/14. 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 9/158:10 amSTL - BKK
2 stops32h 25mANA
Sun 9/219:35 pmBKK - STL
2 stops28h 44mANA
Deal found 9/14$982
This United Airlines deal was found by Cheapflights users on 9/16. 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 12/296:00 amSTL - BKK
2 stops34h 10mUnited Airlines
Thu 1/89:10 amBKK - STL
2 stops25h 03mUnited Airlines
Deal found 9/16$984
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/131:35 pmSTL - BKK
3 stops32h 50mUnited Airlines
Mon 11/244:55 pmBKK - STL
3 stops32h 44mUnited Airlines
Deal found 9/15$998
This United Airlines deal was found by Cheapflights users on 9/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:29 pmSTL - BKK
2 stops28h 56mUnited Airlines
Wed 11/194:55 pmBKK - STL
3 stops30h 56mUnited Airlines
Deal found 9/17$1,007
This oojo deal was found by Cheapflights users on 9/15. 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 10/213:57 pmSTL - BKK
2 stops36h 23mChina Airlines
Tue 10/2810:55 amBKK - STL
2 stops40h 23mChina Airlines
Deal found 9/15$1,022
This oojo deal was found by Cheapflights users on 9/16. 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 9/226:30 pmSTL - BKK
2 stops27h 15mChina Airlines
Wed 9/242:40 amBKK - STL
2 stops57h 19mChina Airlines
Deal found 9/16$1,025
This Delta deal was found by Cheapflights users on 9/14. 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.
Wed 9/246:01 amSTL - BKK
2 stops29h 24mDelta
Sun 9/2811:30 pmBKK - STL
2 stops35h 39mDelta
Deal found 9/14$1,029
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/229:17 amSTL - BKK
2 stops31h 18mUnited Airlines
Thu 9/259:35 amBKK - STL
3 stops48h 25mUnited Airlines
Deal found 9/16$1,049
This Ovago deal was found by Cheapflights users on 9/16. 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 11/187:00 amSTL - HKT
2 stops39h 20mCathay Pacific
Wed 12/312:20 pmHKT - STL
2 stops43h 46mCathay Pacific
Deal found 9/16$1,052

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 September 17, 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. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 9/22

1:26 pm-9:55 pm

2 stops44h 29m

Chiang Mai

Wed 10/1

11:15 pm-12:38 am

2 stops37h 23m

$979

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 11/5

4:55 pm-11:25 am

3 stops29h 30m

Bangkok Suvarnabhumi

Wed 11/19

4:55 pm-5:39 pm

3 stops37h 44m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 11/13

1:35 pm-11:25 am

3 stops32h 50m

Bangkok Suvarnabhumi

Mon 11/24

4:55 pm-12:39 pm

3 stops32h 44m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/24

6:01 am-11:25 pm

2 stops29h 24m

Bangkok Suvarnabhumi

Sun 9/28

11:30 pm-11:09 pm

2 stops35h 39m

$1,029

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 9/22

9:17 am-4:35 am

2 stops31h 18m

Bangkok Suvarnabhumi

Thu 9/25

9:35 am-10:00 pm

3 stops48h 25m

$1,049

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Tue 11/18

7:00 am-11:20 am

2 stops39h 20m

Phuket City

Wed 12/3

12:20 pm-7:06 pm

2 stops43h 46m

$1,054

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 9/28

6:00 am-10:50 am

2 stops40h 50m

Bangkok Suvarnabhumi

Wed 10/1

4:45 pm-11:59 pm

2 stops43h 14m

$1,055

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sat 11/8

7:00 am-9:10 pm

2 stops49h 10m

Phuket City

Sat 11/15

10:55 pm-11:59 pm

2 stops38h 04m

$1,055

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 11/5

7:00 am-11:30 am

2 stops39h 30m

Bangkok Suvarnabhumi

Wed 11/19

2:40 pm-3:18 pm

2 stops37h 38m

$1,057

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Tue 9/23

3:59 pm-10:50 am

2 stops30h 51m

Phuket City

Tue 10/21

11:50 am-11:54 pm

2 stops48h 04m

$1,060

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 35 results
1
2
3
4

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, September is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $900). Flying from St. Louis to Thailand in December is currently the most expensive (average of $1,507). 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 September 17, 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 September 17, 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
964 reviews

Comfort

8.2

Boarding

8.6

Food

7.7

Crew

8.7

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
ANA
8.4
Very good
964 reviews
ANA
8.4
Very good
964 reviews

Comfort

8.2

Boarding

8.6

Food

7.7

Crew

8.7

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Japan Airlines
8.3
Very good
1,559 reviews
ANA
8.4
Very good
964 reviews

Comfort

8.2

Boarding

8.6

Food

7.7

Crew

8.7

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Delta
8.0
Very good
7,961 reviews
ANA
8.4
Very good
964 reviews

Comfort

8.2

Boarding

8.6

Food

7.7

Crew

8.7

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Cathay Pacific
7.6
Good
998 reviews
ANA
8.4
Very good
964 reviews

Comfort

8.2

Boarding

8.6

Food

7.7

Crew

8.7

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
United Airlines
7.4
Good
8,926 reviews
ANA
8.4
Very good
964 reviews

Comfort

8.2

Boarding

8.6

Food

7.7

Crew

8.7

Entertainment

7.9

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me

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 $998, Delta can have you in Thailand from St. Louis in 29h 30m. 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, September is the cheapest month in which you can book a flight from St. Louis to Thailand (average of $900). Flying from St. Louis to Thailand in December is currently the most expensive (average of $1,507). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Thailand

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Narita flights
St. Louis to Haneda flights
Kansas City to Narita flights
Kansas City to Haneda flights
St. Louis to Hyderabad flights
Kansas City to Manila flights
St. Louis to Suvarnabhumi flights
Kansas City to Suvarnabhumi flights
St. Louis to Ho Chi Minh City flights
Kansas City to Hyderabad flights
Kansas City to Bangalore flights
St. Louis to Mumbai flights
St. Louis to New Delhi flights
Kansas City to New Delhi flights
Kansas City to Kuala Lumpur Intl flights
Kansas City to Ho Chi Minh City flights
St. Louis to Manila flights
Kansas City to Mumbai flights
St. Louis to Hongqiao Intl flights
St. Louis to Incheon Intl flights
St. Louis to Taiwan Taoyuan Intl flights
Springfield to Narita flights
St. Louis to Pu Dong flights
St. Louis to Denpasar flights
Kansas City to Incheon Intl flights
Kansas City to Phuket City flights
St. Louis to Cebu City flights
Springfield to Haneda flights
St. Louis to Okinawa flights
St. Louis to Sung Shan flights
Kansas City to Taiwan Taoyuan Intl flights
St. Louis to Chennai flights
Kansas City to Lahore flights
St. Louis to Bangalore flights
St. Louis to Kansai Intl flights
St. Louis to Singapore flights
St. Louis to Colombo flights
Kansas City to Malé flights
St. Louis to Phuket City flights
St. Louis to Malé flights
Kansas City to Da Nang flights
Kansas City to Kathmandu flights
Springfield to Suvarnabhumi flights
St. Louis to Gimpo Intl flights
St. Louis to Kathmandu flights
Kansas City to Hongqiao Intl flights
St. Louis to Fukuoka flights

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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qatar AirwaysCheapest$897Average$1,467FlexibilityNo cancel feeOn-time68%
American AirlinesCheapest$954Average$1,242FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$994Average$1,164FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$1,030Average$1,161FlexibilityNo cancel feeOn-time69%
ANACheapest$1,053Average$1,190FlexibilityNo cancel feeOn-time80%
DeltaCheapest$1,058Average$1,631FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$1,176Average$1,747FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$1,211Average$1,389FlexibilityNo cancel feeOn-time72%
FinnairCheapest$1,289Average$1,456FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.