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Cheap flights from St. Louis to Bangkok from $476

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 1/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
ANA Logo
11:20 am - 6:30 am
STL
-
BKK
30h 10m2 stops
ANA Logo
10:25 pm - 12:29 pm
BKK
-
STL
27h 04m2 stops
$883ANA
ter, jan 20 - ter, jan 27
United Airlines Logo
8:05 am - 5:10 am
STL
-
BKK
32h 05m2 stops
United Airlines Logo
7:10 am - 8:26 pm
BKK
-
STL
26h 16m2 stops
$888United Airlines
seg, fev 9 - ter, fev 17
United Airlines Logo
6:45 am - 12:20 am
STL
-
BKK
28h 35m2 stops
United Airlines Logo
4:55 pm - 8:55 pm
BKK
-
STL
41h 00m3 stops
$904United Airlines
seg, fev 2 - qua, mar 4
ANA Logo
11:20 am - 12:20 am
STL
-
BKK
48h 00m2 stops
ANA Logo
9:10 am - 12:29 pm
BKK
-
STL
40h 19m2 stops
$906ANA
dom, jan 25 - seg, fev 9
ANA Logo
8:05 am - 5:10 am
STL
-
BKK
32h 05m2 stops
ANA Logo
10:25 pm - 12:29 pm
BKK
-
STL
27h 04m2 stops
$926ANA
qui, jan 22 - seg, jan 26
United Airlines Logo
9:57 am - 11:25 am
STL
-
BKK
36h 28m3 stops
United Airlines Logo
4:55 pm - 9:22 am
BKK
-
STL
29h 27m3 stops
$943United Airlines
qui, jan 29 - seg, fev 2
Cathay Pacific Logo
11:05 am - 11:15 am
STL
-
BKK
35h 10m2 stops
Cathay Pacific Logo
7:55 am - 6:11 pm
BKK
-
STL
23h 16m2 stops
$950Cathay Pacific
qua, fev 4 - qua, fev 18
United Airlines Logo
9:57 am - 11:25 am
STL
-
BKK
36h 28m3 stops
United Airlines Logo
4:55 pm - 3:37 pm
BKK
-
STL
35h 42m2 stops
$952United Airlines
qui, jan 29 - seg, fev 2
Japan Airlines Logo
7:04 am - 5:00 am
STL
-
BKK
32h 56m2 stops
Japan Airlines Logo
8:05 am - 6:14 pm
BKK
-
STL
23h 09m2 stops
$964Japan Airlines
qui, jan 15 - qua, jan 28
United Airlines Logo
6:00 am - 12:20 am
STL
-
BKK
29h 20m2 stops
United Airlines Logo
7:10 am - 9:00 pm
BKK
-
STL
26h 50m2 stops
$966United Airlines
seg, fev 9 - ter, fev 17

China Airlines flights from St. Louis to Bangkok Suvarnabhumi Airport

Our best China Airlines deals on St. Louis to Bangkok Suvarnabhumi Airport flight tickets
China Airlines
Jan 12
STL2:50 pmLambert-St Louis
33h 15m
2 stops
BKK1:05 pmBangkok Suvarnabhumi
Mar 1
BKK2:35 amBangkok Suvarnabhumi
48h 16m
2 stops
STL1:51 pmLambert-St Louis
$1,014
Find similar
China Airlines
Jan 12
STL2:50 pmLambert-St Louis
33h 15m
2 stops
BKK1:05 pmBangkok Suvarnabhumi
Mar 1
BKK2:35 amBangkok Suvarnabhumi
48h 16m
2 stops
STL1:51 pmLambert-St Louis
$1,040
Find similar

Japan Airlines flights from St. Louis to Bangkok Suvarnabhumi Airport

Our best Japan Airlines deals on St. Louis to Bangkok Suvarnabhumi Airport flight tickets
Japan Airlines
Jan 15
STL7:04 amLambert-St Louis
32h 56m
2 stops
BKK5:00 amBangkok Suvarnabhumi
Jan 28
BKK8:05 amBangkok Suvarnabhumi
23h 09m
2 stops
STL6:14 pmLambert-St Louis
$964
Find similar
Japan Airlines
Jan 12
STL7:04 amLambert-St Louis
32h 56m
2 stops
BKK5:00 amBangkok Suvarnabhumi
Jan 14
BKK1:10 amBangkok Suvarnabhumi
35h 49m
2 stops
STL11:59 pmLambert-St Louis
$1,024
Find similar
Japan Airlines
Jan 8
STL7:04 amLambert-St Louis
32h 56m
2 stops
BKK5:00 amBangkok Suvarnabhumi
Jan 14
BKK1:10 amBangkok Suvarnabhumi
35h 49m
2 stops
STL11:59 pmLambert-St Louis
$1,157
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Bangkok Suvarnabhumi Airport 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 dezembro 11, 2025.
Use the filters below to find and compare flights from St. Louis to Bangkok Suvarnabhumi Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

ter 1/20

11:20 am-6:30 am

2 stops30h 10m

Bangkok Suvarnabhumi

ter 1/27

10:25 pm-12:29 pm

2 stops27h 04m

$883

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

seg 2/9

8:05 am-5:10 am

2 stops32h 05m

Bangkok Suvarnabhumi

ter 2/17

7:10 am-8:26 pm

2 stops26h 16m

$888

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

seg 2/2

6:45 am-12:20 am

2 stops28h 35m

Bangkok Suvarnabhumi

qua 3/4

4:55 pm-8:55 pm

3 stops41h 00m

$904

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

dom 1/25

11:20 am-12:20 am

2 stops48h 00m

Bangkok Suvarnabhumi

seg 2/9

9:10 am-12:29 pm

2 stops40h 19m

$906

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qui 1/22

8:05 am-5:10 am

2 stops32h 05m

Bangkok Suvarnabhumi

seg 1/26

10:25 pm-12:29 pm

2 stops27h 04m

$926

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qui 1/29

9:57 am-11:25 am

3 stops36h 28m

Bangkok Suvarnabhumi

seg 2/2

4:55 pm-9:22 am

3 stops29h 27m

$943

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qua 2/4

11:05 am-11:15 am

2 stops35h 10m

Bangkok Suvarnabhumi

qua 2/18

7:55 am-6:11 pm

2 stops23h 16m

$950

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qui 1/29

9:57 am-11:25 am

3 stops36h 28m

Bangkok Suvarnabhumi

seg 2/2

4:55 pm-3:37 pm

2 stops35h 42m

$952

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qui 1/15

7:04 am-5:00 am

2 stops32h 56m

Bangkok Suvarnabhumi

qua 1/28

8:05 am-6:14 pm

2 stops23h 09m

$964

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

seg 2/9

6:00 am-12:20 am

2 stops29h 20m

Bangkok Suvarnabhumi

ter 2/17

7:10 am-9:00 pm

2 stops26h 50m

$966

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Bangkok from

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

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 Suvarnabhumi Airport?

The month of September is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from St. Louis, with most prices found around $1,086. The month of January is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from St. Louis averaging around $1,114.

What is the cheapest day to depart on your flight to Bangkok Suvarnabhumi Airport?

The cheapest day to depart on your flight to Bangkok Suvarnabhumi Airport is on a Monday when prices can be found for as low as $1,334. This is often the case because there is less demand to fly during this day of the week. On the other hand, Thursday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,546.

What is the cheapest time of day to depart on your flight to Bangkok Suvarnabhumi Airport?

Our most recent data shows that the best time of day to fly to Bangkok Suvarnabhumi Airport is in the morning. Flights from St. Louis to Bangkok Suvarnabhumi Airport during this time can be as low as $1,339. At noon is when there is more demand to fly to Bangkok Suvarnabhumi Airport, so prices are often more expensive at around $1,754 per ticket.

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

You are more likely to see cheaper flights to Bangkok Suvarnabhumi Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok Suvarnabhumi Airport for around $1,313 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok Suvarnabhumi Airport from St. Louis for as low as $991 on momondo.

How have St. Louis to Bangkok Suvarnabhumi Airport flight prices changed over time?

As of December 2025, prices for St. Louis to Bangkok Suvarnabhumi Airport flights are approximately 40% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Bangkok Suvarnabhumi Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Bangkok Suvarnabhumi Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Bangkok Suvarnabhumi Airport (STL to BKK) flight deals and tips

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

Fastest flight time

26h 10m

Direct flights

None
The fastest flight from St. Louis to Bangkok Suvarnabhumi Airport takes 26h 10m
There are no direct flights from St. Louis to Bangkok Suvarnabhumi Airport. There are no popular flight routes from St. Louis to Bangkok Suvarnabhumi Airport.
Search flight deals

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

    The straight-line distance from Lambert-St Louis to Bangkok Suvarnabhumi is 8747.1 mi. By plane, this route typically takes 26h 10m.

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

    Prices for flights from Lambert-St Louis Airport to Bangkok Suvarnabhumi Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Bangkok Suvarnabhumi Airport.

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

    The travel and health documents required for your trip to Bangkok Suvarnabhumi Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Bangkok Suvarnabhumi Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Bangkok Suvarnabhumi Airport?

Best airlines flying from St. Louis to Bangkok Suvarnabhumi Airport

Compare and see reviews for airlines that fly from St. Louis to Bangkok Suvarnabhumi Airport with momondo
Airline
Rating
Free Cancellation
Price
Qatar AirwaysPriceFrom $897Free CancellationRating
7.4
3,677 reviews
Search Qatar Airways flights
Japan AirlinesPriceFrom $966Free CancellationRating
8.3
1,653 reviews
Search Japan Airlines flights
American AirlinesPriceFrom $979Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
United AirlinesPriceFrom $984Free CancellationRating
7.4
9,093 reviews
Search United Airlines flights
Cathay PacificPriceFrom $991Free CancellationRating
7.6
1,095 reviews
Search Cathay Pacific flights
ANAPriceFrom $1,007Free CancellationRating
8.4
1,021 reviews
Search ANA flights
DeltaPriceFrom $1,058Free CancellationRating
7.9
8,007 reviews
Search Delta flights
Air CanadaPriceFrom $1,176Free CancellationRating
7.1
10,517 reviews
Search Air Canada flights
FinnairPriceFrom $1,340Free CancellationRating
7.6
1,334 reviews
Search Finnair flights

Traveling to a place near Bangkok?

Book flights to Bangkok if you plan to visit one of these locations
Pattaya
Ko Samet
Kanchanaburi
Cha-am
Ko Lan
Chonburi
Ayutthaya
Pak Chong
Sattahip
Phetchaburi

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?

momondo provides multiple filters to help you find the best flight to Bangkok from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for St. Louis to Bangkok flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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