Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Bangkok from $545

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 11/25. 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.
Multiple Airlines Logo
6:19 pm - 11:15 amSTL-BKK
27h 56m2 stops
Multiple Airlines Logo
12:20 pm - 11:59 pmBKK-STL
24h 39m2 stops
$926Multiple Airlines
Find Deal
Sat, Feb 7 - Fri, Feb 27
China Airlines Logo
3:19 pm - 1:05 pmSTL-BKK
32h 46m2 stops
China Airlines Logo
2:35 am - 1:51 pmBKK-STL
47h 16m2 stops
$954China Airlines
Find Deal
Sun, Mar 1 - Sun, Mar 8
China Airlines Logo
7:00 am - 4:45 pmSTL-BKK
45h 45m2 stops
China Airlines Logo
2:35 am - 11:55 pmBKK-STL
57h 20m2 stops
$963China Airlines
Find Deal
Tue, Mar 10 - Mon, Mar 23
Cathay Pacific Logo
6:30 am - 12:15 amSTL-BKK
28h 45m2 stops
Cathay Pacific Logo
1:05 pm - 8:48 pmBKK-STL
44h 43m2 stops
$964Cathay Pacific
Find Deal
Wed, Feb 25 - Sun, Mar 8
Japan Airlines Logo
6:00 am - 4:25 pmSTL-BKK
45h 25m2 stops
Japan Airlines Logo
1:10 am - 11:48 pmBKK-STL
35h 38m2 stops
$968Japan Airlines
Find Deal
Wed, Jan 7 - Tue, Mar 3
China Airlines Logo
2:55 pm - 1:05 pmSTL-BKK
34h 10m2 stops
China Airlines Logo
2:40 am - 11:55 pmBKK-STL
57h 15m2 stops
$973China Airlines
Find Deal
Tue, Mar 24 - Mon, Mar 30
Cathay Pacific Logo
5:59 pm - 4:40 pmSTL-BKK
34h 41m2 stops
Cathay Pacific Logo
4:25 pm - 5:57 pmBKK-STL
37h 32m2 stops
$986Cathay Pacific
Find Deal
Tue, Mar 24 - Tue, Mar 31
Japan Airlines Logo
6:00 am - 11:35 pmSTL-BKK
28h 35m2 stops
Japan Airlines Logo
1:10 am - 11:48 pmBKK-STL
35h 38m2 stops
$989Japan Airlines
Find Deal
Tue, Feb 3 - Tue, Mar 3
China Airlines Logo
6:19 pm - 9:50 amSTL-BKK
26h 31m2 stops
China Airlines Logo
2:05 pm - 1:52 pmBKK-STL
35h 47m2 stops
$990China Airlines
Find Deal
Sat, Feb 7 - Tue, Mar 17
United Airlines Logo
11:20 am - 11:25 amSTL-BKK
35h 05m3 stops
United Airlines Logo
4:55 pm - 9:23 amBKK-STL
29h 28m3 stops
$998United Airlines
Find Deal
Tue, Feb 10 - Tue, Feb 24

China Airlines flights from St. Louis to Bangkok

Our best China Airlines deals on St. Louis to Bangkok flight tickets
China Airlines
Mar 1
STL3:19 pmLambert-St Louis
32h 46m
2 stops
BKK1:05 pmBangkok Suvarnabhumi
Mar 8
BKK2:35 amBangkok Suvarnabhumi
47h 16m
2 stops
STL1:51 pmLambert-St Louis
$954
Find similar
China Airlines
Mar 10
STL7:00 amLambert-St Louis
45h 45m
2 stops
BKK4:45 pmBangkok Suvarnabhumi
Mar 23
BKK2:35 amBangkok Suvarnabhumi
57h 20m
2 stops
STL11:55 pmLambert-St Louis
$963
Find similar
China Airlines
Mar 24
STL2:55 pmLambert-St Louis
34h 10m
2 stops
BKK1:05 pmBangkok Suvarnabhumi
Mar 30
BKK2:40 amBangkok Suvarnabhumi
57h 15m
2 stops
STL11:55 pmLambert-St Louis
$973
Find similar

Cathay Pacific flights from St. Louis to Bangkok

Our best Cathay Pacific deals on St. Louis to Bangkok flight tickets
Cathay Pacific
Feb 25
STL6:30 amLambert-St Louis
28h 45m
2 stops
BKK12:15 amBangkok Suvarnabhumi
Mar 8
BKK1:05 pmBangkok Suvarnabhumi
44h 43m
2 stops
STL8:48 pmLambert-St Louis
$964
Find similar
Cathay Pacific
Mar 24
STL5:59 pmLambert-St Louis
34h 41m
2 stops
BKK4:40 pmBangkok Suvarnabhumi
Mar 31
BKK4:25 pmBangkok Suvarnabhumi
37h 32m
2 stops
STL5:57 pmLambert-St Louis
$986
Find similar
Cathay Pacific
Feb 4
STL7:04 amLambert-St Louis
39h 11m
2 stops
BKK11:15 amBangkok Suvarnabhumi
Feb 13
BKK12:45 pmBangkok Suvarnabhumi
42h 18m
2 stops
STL6:03 pmLambert-St Louis
$1,014
Find similar

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 November 19, 2025.
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

Sat 2/7

6:19 pm-11:15 am

2 stops27h 56m

Bangkok Suvarnabhumi

Fri 2/27

12:20 pm-11:59 pm

2 stops24h 39m

$926

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 3/1

3:19 pm-1:05 pm

2 stops32h 46m

Bangkok Suvarnabhumi

Sun 3/8

2:35 am-1:51 pm

2 stops47h 16m

$954

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 3/10

7:00 am-4:45 pm

2 stops45h 45m

Bangkok Suvarnabhumi

Mon 3/23

2:35 am-11:55 pm

2 stops57h 20m

$963

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/25

6:30 am-12:15 am

2 stops28h 45m

Bangkok Suvarnabhumi

Sun 3/8

1:05 pm-8:48 pm

2 stops44h 43m

$964

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 1/7

6:00 am-4:25 pm

2 stops45h 25m

Bangkok Suvarnabhumi

Tue 3/3

1:10 am-11:48 pm

2 stops35h 38m

$968

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 3/24

2:55 pm-1:05 pm

2 stops34h 10m

Bangkok Suvarnabhumi

Mon 3/30

2:40 am-11:55 pm

2 stops57h 15m

$973

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 3/24

5:59 pm-4:40 pm

2 stops34h 41m

Bangkok Suvarnabhumi

Tue 3/31

4:25 pm-5:57 pm

2 stops37h 32m

$986

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 2/3

6:00 am-11:35 pm

2 stops28h 35m

Bangkok Suvarnabhumi

Tue 3/3

1:10 am-11:48 pm

2 stops35h 38m

$989

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 2/7

6:19 pm-9:50 am

2 stops26h 31m

Bangkok Suvarnabhumi

Tue 3/17

2:05 pm-1:52 pm

2 stops35h 47m

$990

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 2/10

11:20 am-11:25 am

3 stops35h 05m

Bangkok Suvarnabhumi

Tue 2/24

4:55 pm-9:23 am

3 stops29h 28m

$998

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 September, then book flights to Bangkok from St. Louis during January instead. Flights to Bangkok in January, while not as cheap as those in September, still average around $1,114.

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

On average, the least expensive day to fly to Bangkok from St. Louis is on a Monday. momondo users have found tickets for Monday departures for as low as $1,334. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from St. Louis to Bangkok on a Thursday will generally be more expensive and average around $1,546. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Bangkok is in the morning. momondo users have found flights departing from St. Louis to Bangkok in the morning for as low as $1,339. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $1,754. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $1,272 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

Direct flights

None
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 24h 10m 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
Qatar AirwaysPriceFrom $897Free CancellationRating
7.4
3,664 reviews
Search Qatar Airways flights
American AirlinesPriceFrom $979Free CancellationRating
7.2
11,046 reviews
Search American Airlines flights
Japan AirlinesPriceFrom $985Free CancellationRating
8.3
1,623 reviews
Search Japan Airlines flights
United AirlinesPriceFrom $986Free CancellationRating
7.4
9,027 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.4
1,007 reviews
Search ANA flights
DeltaPriceFrom $1,058Free CancellationRating
7.9
8,004 reviews
Search Delta flights
Cathay PacificPriceFrom $1,060Free CancellationRating
7.6
1,061 reviews
Search Cathay Pacific flights
Air CanadaPriceFrom $1,176Free CancellationRating
7.1
10,462 reviews
Search Air Canada flights
FinnairPriceFrom $1,289Free CancellationRating
7.6
1,334 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
Fri 12/19
Fri 12/26
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