STL - BKK

$533 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 7/28. 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

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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Flights 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

Thu, Aug 28 - Wed, Sep 3
ANA Logo
9:17 am - 6:00 amSTL-BKK
32h 43m2 stops
ANA Logo
9:35 pm - 2:19 pmBKK-STL
28h 44m2 stops
$980ANA
Find Deal
Thu, Nov 27 - Thu, Dec 4
 Logo
7:00 am - 10:30 pmSTL-BKK
26h 30m2 stops
 Logo
8:05 am - 11:56 pmBKK-STL
28h 51m2 stops
Thu, Nov 27 - Thu, Dec 4
United Airlines Logo
1:35 pm - 10:50 amSTL-BKK
32h 15m3 stops
United Airlines Logo
7:10 am - 9:10 pmBKK-STL
27h 00m2 stops
$990United Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
United Airlines Logo
4:43 pm - 10:50 amSTL-BKK
29h 07m3 stops
United Airlines Logo
4:40 pm - 9:48 amBKK-STL
30h 08m3 stops
$997United Airlines
Find Deal
Thu, Aug 28 - Tue, Sep 2
Delta Logo
6:40 am - 1:05 amSTL-BKK
30h 25m2 stops
Delta Logo
2:35 am - 10:02 pmBKK-STL
31h 27m2 stops
$1,028Delta
Find Deal
Sat, Aug 30 - Fri, Sep 5
Delta Logo
6:00 am - 1:05 amSTL-BKK
31h 05m2 stops
Delta Logo
2:35 am - 9:18 pmBKK-STL
30h 43m2 stops
$1,059Delta
Find Deal
Wed, Aug 6 - Sat, Aug 30
Japan Airlines Logo
7:01 am - 11:00 pmSTL-BKK
27h 59m2 stops
Japan Airlines Logo
8:05 am - 7:21 pmBKK-STL
23h 16m2 stops
$2,374Japan Airlines
Find Deal
Wed, Aug 6 - Sat, Aug 30
Japan Airlines Logo
7:01 am - 11:00 pmSTL-BKK
27h 59m2 stops
Japan Airlines Logo
8:05 am - 7:21 pmBKK-STL
23h 16m2 stops
$2,420Japan Airlines
Find Deal
Sun, Aug 31 - Fri, Nov 14
Air Canada Logo
4:00 pm - 9:55 pmSTL-BKK
41h 55m2 stops
Air Canada Logo
8:00 am - 3:26 pmBKK-STL
44h 26m2 stops
$5,109Air Canada
Find Deal
Sun, Aug 31 - Sun, Nov 9
Air Canada Logo
4:00 pm - 9:55 pmSTL-BKK
41h 55m2 stops
Air Canada Logo
7:10 am - 3:26 pmBKK-STL
45h 16m2 stops
$5,275Air Canada
Find Deal
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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.

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 October, where tickets cost $1,157 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,906 and $1,669 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
High seasonSeptember
Cheapest flight$533
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 10% 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 $533 for a one-way ticket and $980 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?

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to Bangkok are Japan Airlines and ANA. With an average price for the route of $1,155 and an overall rating of 8.3, Japan Airlines is the most popular choice. ANA is also a great choice for the route, with an average price of $1,183 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.

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.
8.3
Japan AirlinesOverall score based on 1489 reviews
7.8Entertainment
7.7Food
8.4Boarding
8.2Comfort
8.7Crew
Airline reviews

This portion of the trip from HCMC to Dallas was operated by American Airline. Unfortunately they are 2 steps below JAL in overall quality. Regardless, AAStill got me where I needed to go on time.

6.0 GoodAnonymous, Apr 2025LAX - DFW
Read more Japan Airlines reviews

This portion of the trip from HCMC to Dallas was operated by American Airline. Unfortunately they are 2 steps below JAL in overall quality. Regardless, AAStill got me where I needed to go on time.

First experience with JAL so was okay to pretty good. 10 hour flight in premium select seat. . Seats in that category should be better than pretty good. Seat pan a little short for tall people but plenty of leg room; I think JAL in process of new planes? Also, — they could have offered a bit more water throughout flight and meals not the greatest. That said, certainly 200 percent better than a very recent AK Air International flight in similar cabin class in comfort and meals.

We ordered for non vegetarian Hindu meal but instead they served us vegetarian Hindu meal. That was also not good. It was very annoying and aggravating. Hope our return from Tokyo to jfk on March 27 same is not repeated. Caterar should understand difference between non vegetarian Hindu meal and vegetarian Hindu meal.

Food was great, Entertainment was bad, movies were not current and just did not have good variety. Granted I was tired so cranky might have played into my evaluation. Overall based on cost I definitely would fly them again. I am a million mile flyer on another airline, the service on JAL really beats all airlines.

Was in premium economy. It is slightly better than economy, but the way the seat reclines actually makes it harder to sit (the seat slides forward and the foot rest comes up - you can lie fairly well reclined but you’ll have to sit cross legged because there is no place for your legs to stretch out. Food is basic economy. Service was great. All in all good, but may make more sense to pay more for business or save a bit and just sit in economy.

Seats in "Premium Economy" were noticeably more comfortable than those in "Economy" and worth the price. My only reservation is that the foot rest did not go higher up. If it did, it would have made the seat much more comfortable.

Attentiveness by crew was very good. The seats were uncomfortable seemingly too hard with inefficient cushioning. This was verified with my traveling companions. Also the incline button was inoperable.

A great flight experience - great seats, lots of ROOM for legs & in the aisle. Great attendants! My flight cost me the same as ZipAir, the website was WAY less confusing & wonky - this will be my 1st choice for my next Japan trip. Very pleased / well cared for.

The plane was dirty, there was trash in the seat pocket in front of me.

Underpricer was terrible. They wanted to charge me $150 for a seat asignment. Kayak is responsible for letting this happen. Please let me know if this is going to happen in the future. If it is i will not use kayak in the future.

Due to turbulence there was no inflight service, which is very understandable, The flight is very short, and safety is more important. There was a bit of a delay with take off, but was to be expected with the rain.

The crew was amazing, really friendly and efficient. One of the best flights I have ever been on. They made the long flight comfortable and I noticed there were two birthdays on the flight. They gave to customers birthday cards and wished them a happy birthday. That was very nice to see.

Everything was great. Wifi was down,but that didn't matter to me.

The best best best flight experience I have ever had. And I fly A LOT. THANK YOU, ANA!!!

When booking the flight i picked it because it said flying with ana even on our e-ticket as well but I showed up to the airport and I flew with united. I have flew with both airlines before and I prefer ana for the food quality and comfortable. So I was disappointed in that outcome and felt the food gave me minor ibs. The whole thing was missing leading with not getting what I thought I was paying for. Felt a bait and switched. Do not have confidence in using this app in the future trips

The flight was smooth, but there were not enough options for meals and I was given beef when I do not eat beef. The flight going was much better because we received more snacks.

This was a large plane with an upper deck. It seems like business was upstairs. If it was a US airline then I would say I sat in economy plus, but I think it was just economy. Though since ANA would not allow me to choose seats for the price it may have been plus. Lots of movies to choose from, and good service.

This was the best airline I’ve ever taken. The staff are amazing. The food was great. The pilot was phenomenal. I would highly recommend this airline.

Uh there was a delay, because of the weather. And what took usually an hour flight to Louisville took about 6+ hours. Flight got canceled

There wasn't much entertainment for my short flight but the onboarding process was smooth and the crew provided wonderful service. The seats were also reasonably comfy. Great flight.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Great flight! Only complaint I had was that I didn’t get breakfast that morning because I don’t eat eggs for breakfast.. I ate an energy bar I bought in the airport which I had never done before. Otherwise, another great Delta flight!

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

The check in and bag drop off for Sky Priority members is slow. The Clear security was also slow - a TSA issue.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

Flight was delayed at the last minute for six hours. Instead of delaying it to a normal hour, they moved it to 10 pm to essentially make it a redeye. There was no compensation or benefit offered for this inconvenience. Once on the plane, Inpaid for WiFi twice with both times it not working because of a “weak WiFi signal”, according to the flight attendants. They also chose the farther possible gates in both airports from the entrance/exit, even though they were one of the few active flights left so late in the evening. Overall it was pretty horrible.

I've stomach problems after 2 hours of flight, Iris, the flight purser not only did her best to make me feel comfortable, she went above and beyond providing pain relievers medicines and ointment. She look and found a doctor passenger on the flight to provide advise. She even report on ground staffs about my condition and provide wheelchair upon arrival. Kudos to her and Cathay Pacific!

So so, crew was overly professional and lacks human touch. Equipment is very old, especially the HKG-PVG CX366 flight. That plane along with its decor must have twenty years of history, or at least I had that impression.

Worst experience I have ever had with any airline in over 25 years.

very professional and very attentive to my Special Needs as I required a Wheel Chair and assistance to board

Everything was fine and I have no complaints or things to note.

Highly impressive. On time. Smooth and fast boarding and disembarkment. Really great service

Overall, it was ok. However, the food was very sub-par.

The economy seats are much indeed roomier. Meals needs improvement.

It was okay overall but the food was very, very bad.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Terrible. Out flight was delayed for 21 (twenty one) hours. United is a joke.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

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