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Cheap flights from St. Louis to Bangkok from $459

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 9/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Bangkok

Cheap round-trip flights

American Airlines Logo
8:50 am - 11:00 pmSTL-BKK
26h 10m2 stops
American Airlines Logo
8:05 am - 11:44 pmBKK-STL
27h 39m2 stops
$884American Airlines
Find Deal
seg, set 22 - seg, out 6
United Airlines Logo
1:35 pm - 11:25 amSTL-BKK
32h 50m3 stops
United Airlines Logo
4:55 pm - 12:39 pmBKK-STL
32h 44m3 stops
$998United Airlines
Find Deal
qui, nov 13 - seg, nov 24
Delta Logo
6:01 am - 11:25 pmSTL-BKK
29h 24m2 stops
Delta Logo
11:30 pm - 11:09 pmBKK-STL
35h 39m2 stops
$1,029Delta
Find Deal
qua, set 24 - dom, set 28
Japan Airlines Logo
6:00 am - 4:25 pmSTL-BKK
45h 25m2 stops
Japan Airlines Logo
8:05 am - 11:59 pmBKK-STL
28h 54m2 stops
$1,032Japan Airlines
Find Deal
dom, nov 30 - seg, dez 15
ANA Logo
8:10 am - 4:35 amSTL-BKK
32h 25m2 stops
ANA Logo
9:35 pm - 6:23 pmBKK-STL
32h 48m2 stops
$1,058ANA
Find Deal
sex, set 19 - dom, set 21
Cathay Pacific Logo
7:00 am - 12:10 amSTL-BKK
28h 10m2 stops
Cathay Pacific Logo
3:05 pm - 7:27 pmBKK-STL
41h 22m2 stops
$1,073Cathay Pacific
Find Deal
qui, nov 13 - seg, nov 24
Cathay Pacific Logo
8:39 am - 10:40 amSTL-BKK
37h 01m2 stops
Cathay Pacific Logo
4:55 pm - 7:27 pmBKK-STL
39h 32m2 stops
$1,074Cathay Pacific
Find Deal
qui, nov 13 - seg, nov 24
Delta Logo
7:05 am - 1:25 pmSTL-BKK
41h 20m2 stops
Delta Logo
12:55 am - 1:00 pmBKK-STL
25h 05m2 stops
$1,149Delta
Find Deal
qui, nov 13 - dom, nov 23
ANA Logo
6:15 am - 5:10 amSTL-BKK
33h 55m2 stops
ANA Logo
10:25 pm - 12:15 pmBKK-STL
26h 50m2 stops
$1,230ANA
Find Deal
seg, dez 1 - sex, dez 5
Japan Airlines Logo
6:00 am - 4:25 pmSTL-BKK
45h 25m2 stops
Japan Airlines Logo
1:10 am - 11:57 pmBKK-STL
35h 47m2 stops
$1,393Japan Airlines
Find Deal
seg, dez 1 - qui, dez 4

United Airlines flights from St. Louis to Bangkok Suvarnabhumi Airport

Our best United Airlines deals on St. Louis to Bangkok Suvarnabhumi Airport flight tickets
United Airlines
Nov 13
STL1:35 pmLambert-St Louis
32h 50m
3 stops
BKK11:25 amBangkok Suvarnabhumi
Nov 24
BKK4:55 pmBangkok Suvarnabhumi
32h 44m
3 stops
STL12:39 pmLambert-St Louis
$998
Find similar
United Airlines
Nov 13
STL5:29 pmLambert-St Louis
28h 56m
2 stops
BKK11:25 amBangkok Suvarnabhumi
Nov 24
BKK4:55 pmBangkok Suvarnabhumi
30h 44m
3 stops
STL10:39 amLambert-St Louis
$1,007
Find similar
United Airlines
Nov 27
STL8:00 amLambert-St Louis
38h 25m
3 stops
BKK11:25 amBangkok Suvarnabhumi
Dec 19
BKK4:55 pmBangkok Suvarnabhumi
57h 26m
3 stops
STL1:21 pmLambert-St Louis
$1,052
Find similar

Delta flights from St. Louis to Bangkok Suvarnabhumi Airport

Our best Delta deals on St. Louis to Bangkok Suvarnabhumi Airport flight tickets
Delta
Sep 24
STL6:01 amLambert-St Louis
29h 24m
2 stops
BKK11:25 pmBangkok Suvarnabhumi
Sep 28
BKK11:30 pmBangkok Suvarnabhumi
35h 39m
2 stops
STL11:09 pmLambert-St Louis
$1,029
Find similar
Delta
Nov 13
STL7:05 amLambert-St Louis
41h 20m
2 stops
BKK1:25 pmBangkok Suvarnabhumi
Nov 23
BKK12:55 amBangkok Suvarnabhumi
25h 05m
2 stops
STL1:00 pmLambert-St Louis
$1,149
Find similar
Delta
Sep 24
STL6:01 amLambert-St Louis
31h 04m
2 stops
BKK1:05 amBangkok Suvarnabhumi
Sep 27
BKK2:35 amBangkok Suvarnabhumi
30h 40m
2 stops
STL9:15 pmLambert-St Louis
$1,314
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 setembro 15, 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

seg 9/22

8:50 am-11:00 pm

2 stops26h 10m

Bangkok Suvarnabhumi

seg 10/6

8:05 am-11:44 pm

2 stops27h 39m

$884

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qui 11/13

1:35 pm-11:25 am

3 stops32h 50m

Bangkok Suvarnabhumi

seg 11/24

4:55 pm-12:39 pm

3 stops32h 44m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qua 9/24

6:01 am-11:25 pm

2 stops29h 24m

Bangkok Suvarnabhumi

dom 9/28

11:30 pm-11:09 pm

2 stops35h 39m

$1,029

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

dom 11/30

6:00 am-4:25 pm

2 stops45h 25m

Bangkok Suvarnabhumi

seg 12/15

8:05 am-11:59 pm

2 stops28h 54m

$1,032

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

sex 9/19

8:10 am-4:35 am

2 stops32h 25m

Bangkok Suvarnabhumi

dom 9/21

9:35 pm-6:23 pm

2 stops32h 48m

$1,058

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qui 11/13

7:00 am-12:10 am

2 stops28h 10m

Bangkok Suvarnabhumi

seg 11/24

3:05 pm-7:27 pm

2 stops41h 22m

$1,073

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qui 11/13

8:39 am-10:40 am

2 stops37h 01m

Bangkok Suvarnabhumi

seg 11/24

4:55 pm-7:27 pm

2 stops39h 32m

$1,074

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

qui 11/13

7:05 am-1:25 pm

2 stops41h 20m

Bangkok Suvarnabhumi

dom 11/23

12:55 am-1:00 pm

2 stops25h 05m

$1,149

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

seg 12/1

6:15 am-5:10 am

2 stops33h 55m

Bangkok Suvarnabhumi

sex 12/5

10:25 pm-12:15 pm

2 stops26h 50m

$1,230

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

seg 12/1

6:00 am-4:25 pm

2 stops45h 25m

Bangkok Suvarnabhumi

qui 12/4

1:10 am-11:57 pm

2 stops35h 47m

$1,393

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between St. Louis and Bangkok Suvarnabhumi Airport?

What is the cheapest month to fly to Bangkok Suvarnabhumi Airport?

The month of October is, on average, the cheapest month to fly to Bangkok Suvarnabhumi Airport from St. Louis, with most prices found around $1,121. The month of January is another great option to travel to Bangkok Suvarnabhumi Airport, with average flight prices from St. Louis averaging around $1,153.

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 $1,295 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 $908 on momondo.

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

As of September 2025, prices for St. Louis to Bangkok Suvarnabhumi Airport flights are approximately 20% 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

Direct flights

None
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
3,624 reviews
Search Qatar Airways flights
American AirlinesPriceFrom $954Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Japan AirlinesPriceFrom $994Free CancellationRating
8.3
1,559 reviews
Search Japan Airlines flights
United AirlinesPriceFrom $1,030Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
ANAPriceFrom $1,053Free CancellationRating
8.4
961 reviews
Search ANA flights
DeltaPriceFrom $1,058Free CancellationRating
7.9
7,954 reviews
Search Delta flights
Air CanadaPriceFrom $1,176Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Cathay PacificPriceFrom $1,211Free CancellationRating
7.6
993 reviews
Search Cathay Pacific flights
FinnairPriceFrom $1,289Free CancellationRating
7.6
1,323 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
Ayutthaya
Chonburi
Cha-am
Ko Lan
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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