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฿4,154+ Cheap flights from St. Louis

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — BKK
15 Oct — 22 Oct1
1 adult
1 adult, Economy

What to know about flights from St. Louis

Discover essential information about flights departing from St. Louis, including flight schedules, destinations, airlines operating at the St. Louis airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 15 September 2025.

Good one-way deal

฿15,221 or less
Price to beat on a one-way flight from Lambert-St Louis.
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Find flights from St. Louis

Cheapest flights from St. Louis
Explore the most affordable flight options available from St. Louis. Find the lowest fares based on data from user searches, with prices last updated on 15 September 2025.

Sat 21/207:00STL - BKK
2 stops39h 15mMultiple Airlines
Sun 1/312:20BKK - STL
2 stops24h 36mMultiple Airlines
Deal found 13/9฿30,316
Mon 2/214:55STL - BKK
2 stops31h 20mMultiple Airlines
Thu 5/223:55BKK - STL
2 stops50h 57mMultiple Airlines
Deal found 14/9฿31,204
Wed 4/314:55STL - BKK
2 stops32h 10mMultiple Airlines
Thu 26/307:15BKK - STL
2 stops41h 05mMultiple Airlines
Deal found 15/9฿31,299
Thu 13/1113:35STL - BKK
3 stops32h 50mUnited Airlines
Mon 24/1116:55BKK - STL
3 stops32h 33mUnited Airlines
Deal found 14/9฿31,648
Wed 7/117:00STL - BKK
2 stops53h 25mUnited Airlines
Wed 4/309:10BKK - STL
2 stops46h 23mUnited Airlines
Deal found 14/9฿31,711
Mon 16/207:41STL - BKK
2 stops32h 29mUnited Airlines
Sun 8/316:55BKK - STL
2 stops43h 32mUnited Airlines
Deal found 13/9฿31,806
Wed 5/1117:29STL - BKK
2 stops28h 56mUnited Airlines
Wed 19/1116:55BKK - STL
3 stops30h 56mUnited Airlines
Deal found 14/9฿31,933
Wed 4/214:55STL - BKK
2 stops31h 20mMultiple Airlines
Wed 11/212:20BKK - STL
2 stops38h 32mMultiple Airlines
Deal found 14/9฿32,060
Sat 17/114:55STL - BKK
2 stops31h 20mMultiple Airlines
Sat 24/123:55BKK - STL
2 stops50h 57mMultiple Airlines
Deal found 15/9฿32,694
Sun 30/1106:00STL - BKK
2 stops45h 25mJapan Airlines
Mon 15/1208:05BKK - STL
2 stops28h 54mJapan Airlines
Deal found 13/9฿32,726
Mon 10/1116:14STL - HKT
2 stops39h 56mMultiple Airlines
Sun 16/1122:55HKT - STL
2 stops38h 04mMultiple Airlines
Deal found 13/9฿33,106
Tue 18/1106:00STL - HKT
2 stops40h 20mCathay Pacific
Wed 3/1212:20HKT - STL
2 stops48h 37mCathay Pacific
Deal found 13/9฿33,614

Find flights from St. Louis within your budget

 
Find flights departing from St. Louis that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 15 September 2025. In the last 7 days, Cheapflights users made a total of 17,341 searches

Fly to

Suvarnabhumi

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/3

14:55-12:05

2 stops32h 10m

Bangkok Suvarnabhumi

Thu 26/3

07:15-12:20

2 stops41h 05m

฿31,299

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/2

08:25-11:25

3 stops38h 00m

Bangkok Suvarnabhumi

Wed 11/2

16:55-09:23

3 stops29h 28m

฿31,648

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 5/11

11:20-11:25

3 stops35h 05m

Bangkok Suvarnabhumi

Wed 19/11

16:55-12:28

3 stops32h 33m

฿31,648

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 13/11

08:20-11:25

3 stops38h 05m

Bangkok Suvarnabhumi

Mon 24/11

16:55-10:51

3 stops30h 56m

฿31,648

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 7/1

17:00-11:25

2 stops53h 25m

Bangkok Suvarnabhumi

Wed 4/3

09:10-21:00

2 stops24h 50m

฿31,711

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 16/2

07:41-05:10

2 stops32h 29m

Bangkok Suvarnabhumi

Sun 8/3

16:55-00:27

2 stops43h 32m

฿31,806

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 17/1

14:55-11:15

2 stops31h 20m

Bangkok Suvarnabhumi

Sat 24/1

23:55-13:52

2 stops50h 57m

฿32,694

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Tue 18/11

06:00-11:20

2 stops40h 20m

Phuket City

Wed 3/12

18:35-23:57

2 stops42h 22m

฿33,614

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Wed 4/2

06:00-17:35

2 stops46h 35m

Phuket City

Wed 11/2

18:35-17:56

2 stops36h 21m

฿33,614

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sat 8/11

08:39-11:20

2 stops37h 41m

Phuket City

Sun 16/11

18:35-23:42

2 stops42h 07m

฿34,375

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 23 results
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Best time to book a flight from St. Louis

Have a flexible travel schedule? Discover the best time to fly from St. Louis with our price prediction graph.
Estimated return 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

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

When is the best time to book a flight from St. Louis?

Use this chart to determine the optimal time to book a return flight from St. Louis to Suvarnabhumi. Price data was last updated on 12 September 2025.

Booking 60 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from St. Louis (average of ฿30,538). Flying from St. Louis in June will prove the most costly (average of ฿40,051). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

What are popular destinations to fly to from St. Louis?

If you’re flying from St. Louis, these routes are more frequently taken by airlines Chicago (740 flights per day), Atlanta (239 flights per day) and Dallas (156 flights per day).

Houston Hobby
Houston Hobby
From ฿480

What is the cheapest place to fly to from St. Louis?

The cheapest city to fly to from St. Louis is Houston Hobby, with prices starting at ฿15,221. Explore other affordable destinations below.

Houston Hobby
Houston Hobby
From ฿480

Browse thousands of different options on Cheapflights for your next trip

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Direct flights from Missouri

Book a direct flight from one of these other cities located in Missouri.
Direct flights from Kansas City

Related info for your journey

Access useful and relevant information related to your journey from St. Louis. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 15 September 2025.

  • What are the most popular destinations to fly to from St. Louis?

    The most selected flight destinations from St. Louis for the current month are Denver, Athens, Cancún. While Denver, Cancún, Atlanta are the top choices made by travellers year-round.

  • What is the cheapest flight from St. Louis to anywhere?

    Users have flown out of St. Louis for as low as ฿15,221 to Houston George Bush Intcntl Airport (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿15,221 to fly from St. Louis.

  • What is the cheapest month to fly from St. Louis?

    At the present moment the cheapest month to fly from St. Louis is currently August; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • How does Cheapflights help users find flights from St. Louis?

    Cheapflights helps you search for flights from St. Louis via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

  • Why should you use Cheapflights to find cheap flight tickets from St. Louis?

    Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

  • Can Cheapflights find flights from St. Louis with no change fees?

    Cheapflights does show flights with no change fees to all users. To see these options for flights from St. Louis, users can toggle the no change fees filter when performing a flight search.

  • Can Cheapflights notify me if prices for flights from St. Louis become cheaper?

    Yes, Cheapflights offers price alerts on flights from St. Louis so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis?

Cheapflights helps you search for flights from St. Louis via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from St. Louis?

Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from St. Louis with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from St. Louis, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from St. Louis become cheaper?

Yes, Cheapflights offers price alerts on flights from St. Louis so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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