฿6,358+ 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 15/4. 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
24 Apr — 1 May1
1 adult
1 adult, Economy, 0 bags

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 25 March 2026. In the last 7 days, Cheapflights users made a total of 17,341 searches

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 22/4

09:10-23:50

2 stops26h 40m

Bangkok Suvarnabhumi

Sun 26/4

15:05-18:04

2 stops38h 59m

฿31,136
Fastest return journey

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 21/4

08:54-23:50

2 stops26h 56m

Bangkok Suvarnabhumi

Tue 28/4

15:55-13:22

2 stops33h 27m

฿31,788

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Thu 7/5

05:51-23:55

2 stops30h 04m

Phuket City

Thu 14/5

21:20-18:04

2 stops32h 44m

฿32,733

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Fri 8/5

09:10-07:35

2 stops34h 25m

Phuket City

Fri 15/5

15:20-16:41

2 stops37h 21m

฿32,766

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 19/9

06:06-06:45

2 stops36h 39m

Bangkok Suvarnabhumi

Sat 26/9

03:15-20:03

2 stops28h 48m

฿32,864

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sat 2/5

08:57-23:55

2 stops26h 58m

Phuket City

Sat 9/5

15:20-19:30

2 stops40h 10m

฿33,451

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 13/4

07:00-06:45

2 stops35h 45m

Bangkok Suvarnabhumi

Mon 20/4

21:00-16:41

2 stops31h 41m

฿33,777

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 11/9

09:46-07:15

2 stops33h 29m

Bangkok Suvarnabhumi

Mon 14/9

02:30-23:20

2 stops32h 50m

฿37,754

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Tue 5/5

08:35-10:20

2 stops37h 45m

Chiang Mai

Thu 14/5

11:20-18:45

2 stops43h 25m

฿38,243

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Mon 4/5

20:17-10:25

3 stops50h 08m

Chiang Mai

Mon 11/5

11:35-08:55

3 stops57h 20m

฿38,374

Flights are sorted by cheapest return flights first.

Deals found on 19/3

Showing 1-10 of 36 resultsSorted by cheapest first
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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 13 March 2026.

Booking 10 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, February is the cheapest month in which you can book a flight from St. Louis (average of ฿29,897). Flying from St. Louis in June will prove the most costly (average of ฿39,939). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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Direct flights from Missouri

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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 25 March 2026.

  • 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 Cancún, Denver, Dallas/Fort Worth Airport. While Denver, Cancún, Atlanta are the top choices made by travellers year-round.

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

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

  • Where are the cheapest places to fly to from St. Louis?

    Here are some of the cheapest flight destinations from St. Louis:
    Fly from St. Louis to Bangkok from ฿31,103

  • 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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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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