Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Bangkok from $407

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bangkok departing on 4/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
Cathay Pacific Logo
7:00 am - 6:15 pm
STL
-
BKK
47h 15m
2 stops
Cathay Pacific Logo
11:40 am - 10:58 pm
BKK
-
STL
23h 18m
2 stops
$907Cathay Pacific
Wed, Mar 11 - Wed, Mar 18
Multiple Airlines Logo
7:00 am - 12:35 pm
STL
-
BKK
40h 35m
2 stops
Multiple Airlines Logo
5:40 pm - 11:59 pm
BKK
-
STL
42h 19m
2 stops
$945Multiple Airlines
Sun, Mar 1 - Thu, Mar 12
STARLUX Airlines Logo
2:47 pm - 12:35 pm
STL
-
BKK
32h 48m
2 stops
STARLUX Airlines Logo
5:40 pm - 1:51 pm
BKK
-
STL
56h 11m
2 stops
$946STARLUX Airlines
Mon, Mar 2 - Mon, Mar 9
United Airlines Logo
7:41 am - 11:25 am
STL
-
BKK
38h 44m
3 stops
United Airlines Logo
4:55 pm - 2:49 pm
BKK
-
STL
33h 54m
3 stops
$952United Airlines
Mon, Mar 2 - Mon, Mar 9
Multiple Airlines Logo
9:15 am - 7:10 am
STL
-
BKK
33h 55m
2 stops
Multiple Airlines Logo
3:05 pm - 3:27 pm
BKK
-
STL
36h 22m
2 stops
$955Multiple Airlines
Sun, Mar 22 - Sun, Sep 20
Multiple Airlines Logo
3:50 pm - 4:40 pm
STL
-
BKK
36h 50m
2 stops
Multiple Airlines Logo
1:10 pm - 3:50 pm
BKK
-
STL
38h 40m
2 stops
$956Multiple Airlines
Tue, Apr 7 - Tue, Apr 21
United Airlines Logo
7:41 am - 11:25 am
STL
-
BKK
38h 44m
3 stops
United Airlines Logo
4:55 pm - 10:25 pm
BKK
-
STL
41h 30m
2 stops
$960United Airlines
Mon, Mar 2 - Mon, Mar 9
Multiple Airlines Logo
2:47 pm - 9:50 am
STL
-
BKK
30h 03m
2 stops
Multiple Airlines Logo
5:50 pm - 1:51 pm
BKK
-
STL
32h 01m
2 stops
$961Multiple Airlines
Mon, Mar 2 - Mon, Mar 9
Multiple Airlines Logo
7:00 am - 9:45 am
STL
-
BKK
38h 45m
2 stops
Multiple Airlines Logo
10:50 am - 2:51 pm
BKK
-
STL
40h 01m
2 stops
$970Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
7:00 am - 9:45 am
STL
-
BKK
38h 45m
2 stops
Multiple Airlines Logo
10:50 am - 2:51 pm
BKK
-
STL
40h 01m
2 stops
$971Multiple Airlines
Mon, Apr 13 - Mon, Apr 20

Cathay Pacific flights from St. Louis to Bangkok

Our best Cathay Pacific deals on St. Louis to Bangkok flight tickets
Cathay Pacific
Mar 11
STL7:00 amLambert-St Louis
47h 15m
2 stops
BKK6:15 pmBangkok Suvarnabhumi
Mar 18
BKK11:40 amBangkok Suvarnabhumi
23h 18m
2 stops
STL10:58 pmLambert-St Louis
$907
Cathay Pacific
Feb 20
STL8:00 amLambert-St Louis
27h 15m
2 stops
BKK12:15 amBangkok Suvarnabhumi
Mar 9
BKK12:45 pmBangkok Suvarnabhumi
47h 13m
2 stops
STL11:58 pmLambert-St Louis
$951
Cathay Pacific
Apr 1
STL6:50 pmLambert-St Louis
35h 10m
2 stops
BKK6:00 pmBangkok Suvarnabhumi
Apr 30
BKK7:10 pmBangkok Suvarnabhumi
39h 49m
2 stops
STL10:59 pmLambert-St Louis
$974

United Airlines flights from St. Louis to Bangkok

Our best United Airlines deals on St. Louis to Bangkok flight tickets
United Airlines
Mar 2
STL7:41 amLambert-St Louis
38h 44m
3 stops
BKK11:25 amBangkok Suvarnabhumi
Mar 9
BKK4:55 pmBangkok Suvarnabhumi
33h 54m
3 stops
STL2:49 pmLambert-St Louis
$952
United Airlines
Mar 2
STL7:41 amLambert-St Louis
38h 44m
3 stops
BKK11:25 amBangkok Suvarnabhumi
Mar 9
BKK4:55 pmBangkok Suvarnabhumi
41h 30m
2 stops
STL10:25 pmLambert-St Louis
$960
United Airlines
Apr 7
STL8:30 amLambert-St Louis
37h 05m
2 stops
BKK9:35 amBangkok Suvarnabhumi
Apr 21
BKK3:45 pmBangkok Suvarnabhumi
29h 40m
3 stops
STL9:25 amLambert-St Louis
$998

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Bangkok 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, momondo users made 832,500 searches. Data last updated February 12, 2026.
Use the filters below to find and compare flights from St. Louis to Bangkok that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 3/11

7:00 am-6:15 pm

2 stops47h 15m

Bangkok Suvarnabhumi

Wed 3/18

11:40 am-10:58 pm

2 stops23h 18m

$907

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 3/1

7:00 am-12:35 pm

2 stops40h 35m

Bangkok Suvarnabhumi

Thu 3/12

5:40 pm-11:59 pm

2 stops42h 19m

$945

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/2

2:47 pm-12:35 pm

2 stops32h 48m

Bangkok Suvarnabhumi

Mon 3/9

5:40 pm-1:51 pm

2 stops56h 11m

$946

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/2

7:41 am-11:25 am

3 stops38h 44m

Bangkok Suvarnabhumi

Mon 3/9

4:55 pm-2:49 pm

3 stops33h 54m

$952

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 3/22

9:15 am-7:10 am

2 stops33h 55m

Bangkok Suvarnabhumi

Sun 9/20

3:05 pm-3:27 pm

2 stops36h 22m

$955

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 4/7

3:50 pm-4:40 pm

2 stops36h 50m

Bangkok Suvarnabhumi

Tue 4/21

1:10 pm-3:50 pm

2 stops38h 40m

$956

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/2

7:41 am-11:25 am

3 stops38h 44m

Bangkok Suvarnabhumi

Mon 3/9

4:55 pm-10:25 pm

2 stops41h 30m

$960

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/2

2:47 pm-9:50 am

2 stops30h 03m

Bangkok Suvarnabhumi

Mon 3/9

5:50 pm-1:51 pm

2 stops32h 01m

$961

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/13

7:00 am-9:45 am

2 stops38h 45m

Bangkok Suvarnabhumi

Mon 4/20

10:50 am-2:51 pm

2 stops40h 01m

$970

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/13

7:00 am-9:45 am

2 stops38h 45m

Bangkok Suvarnabhumi

Mon 4/20

10:50 am-2:51 pm

2 stops40h 01m

$971

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Bangkok from

How to get the cheapest flight ticket from St. Louis to Bangkok

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of January, then book flights to Bangkok from St. Louis during September instead. Flights to Bangkok in September, while not as cheap as those in January, still average around $1,097.

How far in advance should I book a flight to Bangkok?

You are more likely to see cheaper flights to Bangkok from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok for around $1,283 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok from St. Louis for as low as $991 on momondo.

Cheap St. Louis to Bangkok flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Bangkok

Fastest flight time

27h 14m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 27h 14m
There are no direct flights from St. Louis to Bangkok. There are no popular flight routes from St. Louis to Bangkok.
Search flight deals

  • How far is Lambert-St Louis to Bangkok by plane?

    A flight from Lambert-St Louis to Bangkok will travel around 8745.3 mi. Typically, this will take 27h 14m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Bangkok?

    Prices for flights from Lambert-St Louis Airport to Bangkok are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Bangkok?

  • How old do you have to be to fly from Lambert-St Louis Airport to Bangkok?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Bangkok.

  • What documentation or ID do you need to fly to Bangkok?

    The travel and health documents you'll need for your trip to Bangkok may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bangkok. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Bangkok

Compare and see reviews for airlines that fly from St. Louis to Bangkok with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $881Free CancellationRating
7.9
8,189 reviews
Search Delta flights
American AirlinesPriceFrom $954Free CancellationRating
7.2
11,277 reviews
Search American Airlines flights
Japan AirlinesPriceFrom $966Free CancellationRating
8.3
1,704 reviews
Search Japan Airlines flights
Cathay PacificPriceFrom $979Free CancellationRating
7.6
1,162 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $984Free CancellationRating
7.4
9,283 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.4
1,092 reviews
Search ANA flights
Qatar AirwaysPriceFrom $1,017Free CancellationRating
7.4
3,731 reviews
Search Qatar Airways flights
Air CanadaPriceFrom $1,280Free CancellationRating
7.1
10,712 reviews
Search Air Canada flights
FinnairPriceFrom $1,289Free CancellationRating
7.6
1,362 reviews
Search Finnair flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Bangkok?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Bangkok from St. Louis.

Can I find flights from St. Louis to Bangkok with flexible booking policies on momondo?

Flights from St. Louis to Bangkok with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Bangkok?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Bangkok from St. Louis.

I’m not ready to book a flight from St. Louis to Bangkok right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Bangkok flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Bangkok trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 3/14
Sat 3/21
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Thailand

Fly into one of these airports located in Bangkok

Airports listed have a maximum distance of 15.4 mi from Bangkok
Bangkok Suvarnabhumi Airport
Bangkok Don Mueang Intl Airport