STL - BKK

$448 Find Cheap Flights from St. Louis to Bangkok

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Bangkok departing on 1/17. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Bangkok Suvarnabhumi Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Bangkok.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Bangkok.
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Everything you should know

Cheapest round-trip
$880
Typical prices: $1,139-$1,291
Delta
Wed 1/28Wed 3/4
STL - BKK • 2 stops
Cheapest one-way
$448
Typical prices: $607-$1,095
Multiple Airlines
Sat 1/17
STL - BKK • 3 stops
Top airlines
Delta
Cheapest • from $880 (round-trip)
ANA
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
September
Cheapest • 17% price drop
February
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Bangkok!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Bangkok (STL-BKK)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Bangkok that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Bangkok

Wed, Jan 28 - Wed, Mar 4
Delta Logo
6:10 am - 12:55 am
STL
-
BKK
29h 45m2 stops
Delta Logo
2:05 am - 11:23 pm
BKK
-
STL
34h 18m2 stops
$880Delta
Mon, Apr 13 - Sun, Apr 26
United Airlines Logo
8:30 am - 9:45 am
STL
-
BKK
37h 15m2 stops
United Airlines Logo
9:35 am - 9:28 am
BKK
-
STL
59h 53m2 stops
$900United Airlines
Wed, Jan 28 - Thu, Mar 5
United Airlines Logo
10:07 am - 11:25 am
STL
-
BKK
36h 18m3 stops
United Airlines Logo
4:55 pm - 4:59 pm
BKK
-
STL
37h 04m3 stops
$901United Airlines
Tue, Feb 24 - Tue, Mar 10
United Airlines Logo
6:00 am - 12:20 am
STL
-
BKK
29h 20m2 stops
United Airlines Logo
4:55 pm - 2:42 pm
BKK
-
STL
33h 47m3 stops
$904United Airlines
Mon, Apr 13 - Thu, Apr 30
United Airlines Logo
8:30 am - 9:45 am
STL
-
BKK
37h 15m2 stops
United Airlines Logo
7:00 am - 5:47 am
BKK
-
STL
34h 47m2 stops
$905United Airlines
Sun, Mar 1 - Tue, Mar 10
United Airlines Logo
6:55 pm - 5:10 am
STL
-
BKK
45h 15m2 stops
United Airlines Logo
4:55 pm - 2:42 pm
BKK
-
STL
33h 47m3 stops
$907United Airlines
Tue, Jan 13 - Tue, Jan 20
United Airlines Logo
5:00 pm - 11:25 am
STL
-
BKK
29h 25m2 stops
United Airlines Logo
4:55 pm - 2:30 pm
BKK
-
STL
34h 35m3 stops
$909United Airlines
Tue, Jan 13 - Tue, Jan 20
United Airlines Logo
5:00 pm - 11:25 am
STL
-
BKK
53h 25m2 stops
United Airlines Logo
4:55 pm - 3:37 pm
BKK
-
STL
35h 42m2 stops
$921United Airlines
Mon, Apr 13 - Sun, Apr 26
United Airlines Logo
8:30 am - 9:45 am
STL
-
BKK
37h 15m2 stops
United Airlines Logo
3:40 pm - 4:52 pm
BKK
-
STL
61h 12m3 stops
$926United Airlines
Sat, Feb 28 - Tue, Mar 10
United Airlines Logo
8:30 am - 5:10 am
STL
-
BKK
31h 40m2 stops
United Airlines Logo
4:55 pm - 4:49 pm
BKK
-
STL
35h 54m3 stops
$935United Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Bangkok flights

Get data-powered insights and trends into flights from St. Louis to Bangkok to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Bangkok Suvarnabhumi Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Bangkok Suvarnabhumi Airport departing in January.

What’s the cheapest day of the week to fly from St. Louis to Bangkok?

The average price of all round-trip flights from St. Louis to Bangkok Suvarnabhumi Airport clicked on KAYAK for each day over the last 12 months.

When flying from St. Louis to Bangkok, you should consider leaving on a Monday and avoid Thursdays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Thursdays and the most expensive ones on Mondays.

What is the cheapest month to fly from St. Louis to Bangkok Suvarnabhumi Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Bangkok Suvarnabhumi Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Bangkok Suvarnabhumi Airport is September, where tickets cost $1,086 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,906 and $1,623 respectively.

How far in advance should I book a flight from St. Louis to Bangkok Suvarnabhumi Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Bangkok Suvarnabhumi Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Bangkok Suvarnabhumi Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$448
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from St. Louis to Bangkok

When to book flights from St. Louis to Bangkok

Are your dates flexible? Find out the best times to travel from St. Louis to Bangkok based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking St. Louis to Bangkok flights

  • What is the cheapest flight from St. Louis to Bangkok Suvarnabhumi Airport?

    In the last 3 days, the lowest price for a flight from St. Louis to Bangkok Suvarnabhumi Airport was $448 for a one-way ticket and $880 for a round-trip.

  • Do I need a passport to fly between St. Louis and Bangkok?

    A passport is required to fly from St. Louis to Bangkok.

  • Which airports will I be using when flying from St. Louis to Bangkok?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Bangkok, also known as Bangkok Suvarnabhumi.

  • Which aircraft models fly most regularly from St. Louis to Bangkok?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Bangkok?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between St. Louis and Bangkok, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Bangkok, ANA or Japan Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Bangkok are ANA and Japan Airlines. With an average price for the route of $1,217 and an overall rating of 8.4, ANA is the most popular choice. Japan Airlines is also a great choice for the route, with an average price of $1,131 and an overall rating of 8.3.

  • How does KAYAK find such low prices on flights from St. Louis to Bangkok?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Bangkok.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Bangkok?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bangkok from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Bangkok?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Bangkok with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and BKK can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Bangkok?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Bangkok from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from St. Louis to Bangkok

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Bangkok. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Bangkok? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
ANAOverall score based on 1027 reviews
8.7Crew
7.7Food
8.6Boarding
8.2Comfort
7.9Entertainment
Airline reviews

Although the flight was delayed because of the equipment came in late, I still give them excellent service ..good food selection and in flight entertainment were sufficient.. I will continue to fly with them

10.0 ExcellentAnonymous, Dec 2025
NRT - ORD
Read more ANA reviews

Although the flight was delayed because of the equipment came in late, I still give them excellent service ..good food selection and in flight entertainment were sufficient.. I will continue to fly with them

First trip from Tulsa to Houston by air. It went by quickly. I watched half a movie and continued the rest on the next flight. Staff was considerate and helpful.

The meals were sufficient and tasty considering it was air travel food. Water coffee and juices offered each time a meal came by and water distributed between meals. It was good service in my opinion. Plenty of movies to enjoy. May not be the one you want but plenty of older movies and plenty of current ones as well. I enjoyed the trip.

Flight was good and comfortable, even for long haul economy. No complaints.

Checking in via an alliance partner, even a foreign one should get TSA Precheck printed on your boarding pass. The paper copy issued by ANA didn’t show it. I couldn’t get my digital copy due to some technical issue arising because I checked in with ANA. The kiosks at SFO similarly threw an error. The only way I could have gotten a new copy of my boarding pass was from the UA counter and lines were nearly as long as TSA so I bit the bullet and went through the regular TSA line. If UA wants my business, they need to improve that process.

They lost my luggage on the inbound flight and then lost it again on this flight. I called online travel agent to change earlier flight to get a longer layover in Vancouver but ANA denied it

Suite lounge in Honolulu is very exclusive and boarding from the lounge into the plane is unique. First suites were huge and comfortable. Japanese meal is like a high end omakase meal. All the staff were very kind and provided sophisticated service. Fast Track upon landing was appreciated but not needed this time because immigration was so empty and easy.

I like the service very much. The food just okay but maybe different culture who like, who don't like.

Great first time experience on this airline. Very professional staff and great service.

Warm the bread. Movies: better choices to include Chinese movies options or some of the older winners of flim festival

I fell asleep, and the crew kindly left some snacks for me

I was so hungry , from Boston to Tokyo, only 2 big food .

The crew was nice, the food could be better, and at least 2 bathroom stalls were out of service.

Good experience for economy transpacific. Reasonable comfortable seats. Food was not as good as I expected or had on other prior transpacific flights but likely attribute that to rising cost of supplies. Staff is courteous. Overall, very good.

great experience - staff were kind and attentive and food was excellent. very comfortable flight that felt much shorter than 14 hours.

The original email I received and flight that I paid for was for Japan Airlines. Since JAL is a partner with American, I ended up on an American Airlines plane. This would not be a problem, except that JAL allows 2 check in bags for free and American only allows 1. A $100.00 unexpected expense was very disturbing, especially since I will have to pay it again on my way home. I feel like it was a bait and switch. I never would have chosen American Airlines if I had known that I would have to pay $200.00 in baggage fees, above and beyond my airfare. Secondly, the check in counter representative did not realize that I had TSA pre-check, so I had to return to the check-in desk on a different floor to get a new boarding pass. The AA representative helping at the check-in kiosks was very helpful, kind, polite, and professional when I returned for the new boarding pass. Thirdly, the crew was not as friendly as I have experienced on other airlines. Their tone when speaking to other passengers was not always polite. The food was better than I expected. However, I am used to having a station where one can serve themselves water, juice or grab a snack. That was not the case on this flight. Truly makes me think twice about booking with American Airlines. I am very disappointed.

Crews are rude and short. Example: after my drink and was ready to prep my bed to rest. I tried to give my empty glasses to the steward while she was playing her card game on her iPad. The steward told me to take the glass back to my table instead of taking the glass out of my hand. Compare Japanese steward it’s like heaven and hell.

The seat was uncomfortable and seemed to be on its last days. Loose and sloppy

I traveled business class from Lax to Narita flight Jl61. The crew was attentive and polite. Food was good quality and service was as it should be. Narita to Bengaluru Jl753was another story in business class. The cabin was darkened for the 9hr:30min flight, food was mediocre, service was below standard and crew can't speak English to save their lives. When you ask for noodles soup from Ala carte they gave cup of noodles while Lax to Narita i was served the best Ramen noodles in a big bowl. Why the disparity on this leg of the journey.....or is it because there were mostly Indian passengers and it really did not matter to Jal to bother as its a poor country and Indians refrain from speaking up? A good airline but differentiation like this brings their reputation and business down.

put me in front row, screen was tiny, movie slection wasnt very good will be flying back on another airlines

Great. I had to modify a flight. That was easy and free. Thank You

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

None of the airplane features were available during the flight.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Getting to the flight was arduous and lengthy. The flight itself was good but the food option wasn’t a good selection. I need to do a Kosher option on my return. Flight crew were nice

Good seats in Main cabin, excellent service and excellent landing

My flight was suppose to be at 7:45pm to fly but it didnt fly out until 8:55 to dallas so then all of my other flights was late and delay ihad to wait at the airport for extra 14 hours to be able to get on a different plane

There were delays at boarding and landing. These events resulted in a tight transfer time in HK. Poor signage for transfers. Finally, lost luggage at final destination.

It was good. The planes needed to be updated though, they were dated and the entertainment systems were old. Service was amazing. The pre-booked meals were lacklustre.

Super delayed. Unnecessary. Need more competent people doing logistics to keep things moving on time. Totally unacceptable.

Flew from lax economy on cathay 777. Seat configuration 3-4-3. When the forward seat reclines it feels like someone is leaning forward and staring you. If you are slightly big tray tables will touch your abdomen even with seats upright. AVOID this above 777 configuration at all cost for a long flight. However their Airbus 350 3-3-3 configuration felt spacious and Seats wider.

Leg room wasn't that great. Other than that it was a good flight

The lead business class attendant was excellent. Made a point of greeting you and knowing your name by the time you leave.

Seats in the absolute back row of the plane even though we booked ages ago :( Crew was awesome though

My connecting flight was canceled or never existed. My stopover went from 1 hour and a half to 10 hours. It was a long day that I wasn't prepared for and it would have been nice to know that ahead of time. Cathay is great though. Great staff, entertainment and food.

Great entertainment system, the seat is a bit old style needs refurbishment

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

United have really come back. Airport and boarding process is clear and good, app and information also very good

They charged a fee for 1st bag checked. Others in same party were free.

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

Everything you need to know for your flight from St. Louis to Bangkok

Information on your arrival and departure airports