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Cheap Flights from St. Louis to Thailand

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Phuket City
Phuket City2 stops$1,087
Chiang Mai
Chiang Mai2 stops$1,216
Phuket City
Phuket City2 stops$1,087
Chiang Mai
Chiang Mai2 stops$1,216
Booking Insights

Price, demand and travel trends for St. Louis to Thailand flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from St. Louis to Thailand cheaper or more expensive than last year?

Fares from St. Louis to Thailand are running about 8% lower than they were around this time last year, averaging $1,210 round-trip.

What are the cheapest fares from St. Louis to Thailand right now?

Here are the cheapest round-trip fares from St. Louis to Thailand on KAYAK in the last week:

• Bangkok Suvarnabhumi (BKK) from $905
• Phuket City (HKT) from $1,087
• Chiang Mai (CNX) from $1,216

What’s the cheapest month to fly from St. Louis to Thailand?

September is the cheapest time of year to fly, with average fares of $1,033. Prices are highest in December, when average flight costs increase to around $1,807.

When is the best time to book flights from St. Louis to Thailand?

Book your flights 21 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 24% compared to booking last-minute (within 2 weeks of departure).

Which airport in Thailand is the cheapest to fly to from St. Louis?

Based on KAYAK data from the past 12 months, the cheapest airports to fly into Thailand are:

• Phuket City (HKT) from $1,182
• Bangkok Suvarnabhumi (BKK) from $1,251
• Chiang Mai (CNX) from $1,691

What’s the cheapest day to fly from St. Louis to Thailand?

Sunday tends to be the cheapest day to fly from St. Louis to Thailand, while Friday is the most expensive. Fares run about 16% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from St. Louis to Thailand?

Data from the past 12 months shows it's cheapest to fly to Thailand during the morning with average prices of $1,228. The evening is the most expensive time to fly, with average prices of $1,424.

Key details for St. Louis to Thailand flights

Low season

October

Cheapest flight

$520
Beat the crowds with an average 43% drop in travelers.
The most popular month to fly with an average 14% increase in travelers.
One-way flight from St. Louis to Bangkok Suvarnabhumi Airport

Your St. Louis to Thailand flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from St. Louis to Thailand?

    Yes. Fares from St. Louis to Thailand are low right now. As a rule of thumb, a round-trip under $1,089 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from St. Louis to Thailand?

    Over the past 12 months, round-trip fares from St. Louis to Thailand have ranged from $1,089 to $1,611.

  • What are the main airports serving Thailand?

    Thailand has 3 airports. The three busiest are Bangkok Suvarnabhumi (BKK) (75% of arrivals), Phuket City (HKT) (13%) and Chiang Mai (CNX) (12%).

  • Which cabin classes are available on flights from St. Louis to Thailand?

    On flights from St. Louis to Thailand you can book Economy Class, Premium Economy Class, Business Class or First Class.

  • What are some popular landmarks in Thailand?

    KAYAK travelers' favorite landmarks in Thailand include:

    • Lamai Beach
    • Pratunam
    • Chaweng Beach
    • Phuket Old Town

Your guide to booking St. Louis to Thailand flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 21 weeks before your trip. KAYAK data shows fares in this window are around 24% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • If your travel dates are flexible, book your trip for September when flights are typically cheapest and avoid December when prices are at their highest.
  • Flying on Sunday is usually the cheapest. Flights on Friday cost about 16% more on average, so being flexible with your travel dates could help you save.
  • If you're looking to save, Phuket City (HKT) is the cheapest airport to fly into from St. Louis. If you have onward travel, don't forget to factor in the cost of your journey by train, bus or domestic flight.
  • Start your trip in Bangkok, which is the most popular destination in Thailand. From there, it's easy to continue on to other popular destinations such as Pattaya, Phuket City and Chiang Mai.

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

 
Need help choosing which airline to fly with from St. Louis to Thailand? 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 1935 reviews
8.4Boarding
8.2Comfort
8.7Crew
7.8Entertainment
7.7Food
Airline reviews

Dreamliner is an excellent aircraft. Great seats in business. Flight attendant Alex had a bored, sullen attitude in serving customers. Difficult to get his attention and very slow to respond to a simple request for water. Spoiled the experience a bit as the AA motto is “we’re here because of you”. Attitude needs some adjustment!

6.0 GoodAnonymous, Oct 2026
Read more Japan Airlines reviews

Dreamliner is an excellent aircraft. Great seats in business. Flight attendant Alex had a bored, sullen attitude in serving customers. Difficult to get his attention and very slow to respond to a simple request for water. Spoiled the experience a bit as the AA motto is “we’re here because of you”. Attitude needs some adjustment!

There was a certain guy in American Airlines his name is AAROON who tried to charged me for 246 dollars so I can fly from Dallas to DJT Palm Beach International Airport ; wherein it is not my fault why the flight is delayed so why do I need to pay ? I insisted my rights and told me to contact the company who booked me. But upon taking to Japan Airlines people they said upon checking I don’t have to pay additionally. So please check your people who does so things like this to passengers.

The best part was the staff. They are kind and gracious and made it a good flight.

Reasonable price, great service, highly recommended. i arrived well rested!

Since I traveled on my birthday, they gave me a gift and a card. How thoughtful and caring.

Excellent overall, the staffs and amenities were delightful even using the outdated aircraft.

American Airlines didn’t allow you to complete online check-in unless you paid for your seats. Quite disappointing.

Food as always. PA was not clear, especially the English ones. Very limited Hollywood movies. Unlike the first flight I had, this plane has less leg room and less room for my under seat baggage.

Please change menu every now & then bc I fly twice within the year and serving the food the same

1 hour late for unknown reasons. Passengers were not told why. We sat in the plane, I felt the 7 hour flight turned into an 8 hour flight.

The flight was delayed and knowing I was going to miss my connection, nothing was done proactively to try and get me rebooked. It was an act of congress to do so. This is not on the crew, but on the experience itself

Your survey needs a N/A option. I didn’t use the entertainment or eat food.

Flight was delayed multiple time and for more than 1 hr. My onward flight from BOS to MCI was also delayed. These delays have caused me so much inconvenience and Delta does nothing to ensure flights take off on time. No one knew why the inbound flight was delayed and what was the issue.

Our flight was delayed by over 4 hours due to a maintenance issue. They announced a new plane was on the way. We were given a $12 food voucher ( airport food is quite expensive You can’t even by a water and a small snack for 12:00. 4 hours later we boarded and landed in Atlanta at 10:20 ish pm. Of course we missed our connection and we were given a hotel voucher and another food voucher ! We didn’t make it home until 11:00 the next day ! Unacceptable

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.

For a 17hr economy flight it wasn’t bad at all, thankfully it wasn’t a narrow body plane.

Simplicity of boarding and corporate interactions were all totally positive and simple, brief, organized and clear. No regrets at all. I will favor flights with Cathay Pacific in the future.

Weather delayed arriving flight and even though I made the connection, my luggage did not.

The service was better on this flight from the long haul one, but still very poor from The Cathay Pacific of the past.

Seat was very old. Didn’t easily go up and down. Flight Attendent had issues moving the seat. Condition of the seat was ok. Parts were peeling off by the foot area. Food was ok. Ran out of the dish I wanted so got the beef. Beef filet was very tender but the sauce was a little strange. Disembarking was very easy.

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.

Baggage delayed for 2 days and still chasing for reimbursement of basis items. Very horrible customer care service.

Crew experience was more transnational, seats were so close together (LtoR and FtoB) that it was difficult to enjoy much of anything. When the person in front leaned back, there is no space for me. Sadly it was a flight to be endured not experienced.

One of the worst flight in business class by qatar airways and I’m no stranger with qatar airways businesses class, I travelled with the extensively in the past 12 years

Everything was good food could be better but ok for economy on my 2nd flight the head ph jack are bad you have to hold pushed in to hear anything but other then that very nice service

Great Brasilia aircraft - not a Boeing 757 like the next part of the flight. Flight from MCI to IAD was great, on-time, comfortable, did I mention that? The flight from IAD to EDI was painful. One of the reasons I won't fly United again? Boeing 757, with a seat pitch and material that was horrendous. Worst aircraft ever, made worse by United sardine-can tight seating. Oh, and the connection window, 45 minutes, really? At IAD, in different concourses? What idiot came up with that flight scenario? Happily, (for me and my travel insurance people) the flight was late (reminiscent of American Airlines). The crew was professional and courteous.

On boarding crew at the airport called in the boarding numbers too early meaning before the previous line was completed resulting in later numbers getting to board ahead. Also she asked those who boarded from number 3 to have the tags in their carry-on bags and leave it in the jet bridge. Most of the overhead bins were empty though. This is more work for the ground staff in addition to more inconvenience for passengers waiting to get their carry-ons from the jet bridge.

The flight to America was freezing. The overnight flight back to the UK was boiling hot and the cabin stank of toilet or occasionally perfume, even though I was several rows back from either bathroom. Food was tiny portions. Two small pieces of tough and dry beef in random gravy with pretend mashed potato raking up most of it. Very little veg. Salad was ok. Wooden cutlery broke within minutes of using. Lots of old films for entertainment. Some new ones. Generally a bit rubbish.

I almost missed my connection in Chicago due to having to wait on a gate to be open I am assuming. Having to run from E terminal to C terminal and I barely made it there before they closed the door. This may not be the actual airline's fault it's crazy how there is so little time between flight especially when they are placed so far apart in the airport.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

We flew with Qatar Airlines before (2021) , the service was much better than this time, the flight attendants were not very friendly and cheerful . One of the attendants asked the person setting next to me (by the window) are you Mr. ……, if you may need any thing to let her know . I asked for a dinner meal with beef , she said, we are out, only chicken is available, then she said wait I may get you one with beef, she came back and gave me chicken. Then she gave the gentleman next to me the beef meal . The bathrooms were left dirty and full of overfilled paper tissues, urine every where on the floor and on the toilet seat . Qatar Airways has an excellent reputation and deserves better . Thank you 🙏

old aircraft, some of the crew are not polite. I chose my seat to be window and I found it with no window and the seat was not operating...!!!

Horrible horrible plane for such a long flight. I thought Qatar was a reputable airline. Was proven so wrong. Never again…:-(

Qatar Airways has consistently set a standard in my mind that very few airlines manage to sustain, and once again, this journey in Economy Class lived up to that expectation. As an avid globetrotter who travels extensively for work, I experience many airlines, service cultures, and levels of hospitality. Yet there is something reassuringly consistent about Qatar Airways. It is not simply the onboard service, but the entire experience: the professionalism, courtesy, warmth, attentiveness, and genuine sense of hospitality. The cabin crew are exceptionally well trained, composed, aligned, and polished in their delivery, yet their interactions rarely feel mechanical. They remain remarkably courteous while retaining a genuine human warmth and an apparent eagerness to assist. On almost every Qatar journey, there are individual crew members who somehow manage to stand out and make the experience even more memorable. What I value most is the consistency. Qatar Airways has established a certain benchmark of expectation for me and, over many journeys, has never underdelivered against it. There is a sense of confidence and ease that comes with boarding a Qatar flight because I know the overall experience will be thoughtfully delivered. For someone who spends a considerable amount of time travelling, that peace of mind matters enormously. Qatar Airways remains one of the airlines I genuinely enjoy flying, not because of any single aspect of the service, but because of the complete package and the remarkable consistency with which it is delivered. The only disappointment on this occasion was that my luggage did not arrive with me at my final destination in Kolkata (CCU), following my journey from Seattle (SEA) via Doha (DOH). Unfortunately, the baggage was delayed in Doha. A baggage exception report is already on file with the local airport team in CCU. Given the confidence Qatar Airways has built with me over the years, I remain optimistic that they will once again live up to that expectation, work their magic, and reunite me with my luggage within the next 24 hours. Looking forward to a swift resolution and, notwithstanding this final hiccup, another thoroughly enjoyable Qatar Airways journey.

Mediocre movies Too cold Didn’t have extra blankets Check in was too long (60-70 min coming 3 hours early) Breakfast was terrible Great WiFi however And smooth ride Dinner was decent

Really good food and service. Qatar Airways is again and again provided an exceptional experience.

This flight was a very good trip for us. The crew were very friendly and helpful. They made arrangements for my husband to have assistance in boarding. We were not expecting a meal, so it was a pleasant surprise on this short flight to have a meal and beverage from a very courteous crew.

I prebooked a comfort plus seat on this flight and therefore the flight was comfy. I got the correct seat in the correct section of the plane that I have booked, that's this. Flight was comfortable. Staff were average on the flight, appearing to be rushed and short in engagement with travellers, perhaps this to maximise there rest time on the flight.

Staff was very friendly. There is no on board entertainment, but it’s such a short flight that it doesn’t matter. We also got a meal which was nice and unexpected due to the length of the flight.

Flight was fine overall. What you would expect from economy seats. I did appreciate the amenities (eyemask, earplugs, small toothbrush and toothpaste, thin socks).

More options for your flight from St. Louis to Thailand

Complete your trip to Thailand with a hotel stay or car rental