฿6,554+ 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 20/5. 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
4 May — 11 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 4 April 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

Fri 1/5

07:00-23:50

2 stops28h 50m

Bangkok Suvarnabhumi

Fri 8/5

15:55-20:09

2 stops40h 14m

฿31,794

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 2/5

07:05-23:50

2 stops28h 45m

Bangkok Suvarnabhumi

Sat 9/5

15:55-16:41

2 stops36h 46m

฿34,436

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sat 16/5

05:51-07:35

2 stops37h 44m

Phuket City

Sat 23/5

21:20-23:44

2 stops38h 24m

฿36,001

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 17/5

05:51-23:50

2 stops29h 59m

Bangkok Suvarnabhumi

Sun 24/5

15:55-20:30

2 stops40h 35m

฿36,066

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 27/5

06:00-23:50

2 stops29h 50m

Bangkok Suvarnabhumi

Wed 24/6

03:15-23:54

2 stops32h 39m

฿36,392

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 14/9

06:25-09:45

3 stops39h 20m

Bangkok Suvarnabhumi

Mon 21/9

17:30-18:38

2 stops37h 08m

฿37,436

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Fri 21/8

11:55-10:20

2 stops34h 25m

Chiang Mai

Mon 24/8

11:20-17:40

2 stops42h 20m

฿40,305

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 18/5

07:00-06:30

2 stops35h 30m

Bangkok Suvarnabhumi

Mon 25/5

15:55-14:06

2 stops34h 11m

฿41,153

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Fri 29/5

07:00-23:55

2 stops28h 55m

Phuket City

Mon 8/6

21:20-19:21

2 stops34h 01m

฿42,001

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 26/5

09:08-06:15

2 stops33h 07m

Bangkok Suvarnabhumi

Tue 23/6

03:15-23:54

2 stops32h 39m

฿43,175

Flights are sorted by cheapest return flights first.

Deals found on 31/3

Showing 1-10 of 32 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 2 April 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 ฿29,903). Flying from St. Louis in June will prove the most costly (average of ฿40,012). 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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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 4 April 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 Denver, Atlanta, 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 ฿31,109

  • 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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