$536 Find Cheap Flights from St. Louis to Vietnam

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 Vietnam departing on 8/14. 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.
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Best Vietnam Flight Deals from St. Louis

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Ho Chi Minh City
Ho Chi Minh City2 stops$988
Hanoi
Hanoi2 stops$1,282
Da Nang
Da Nang3 stops$1,865
Ho Chi Minh City
Ho Chi Minh City2 stops$988
Hanoi
Hanoi2 stops$1,282
Da Nang
Da Nang3 stops$1,865

Cheap Flights from St. Louis to Vietnam

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Vietnam 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.

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

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from St. Louis to Vietnam.
Discover the best prices for you by selecting your travel dates on KAYAK.
ANA Logo
12:28 pm - 9:55 pmSTL-SGN
45h 27m2 stops
ANA Logo
11:15 pm - 2:19 pmSGN-STL
27h 04m2 stops
$988ANA
Find Deal
Mon, Oct 6 - Mon, Oct 13
ANA Logo
8:20 am - 9:55 pmSTL-SGN
25h 35m2 stops
ANA Logo
11:15 pm - 2:19 pmSGN-STL
27h 04m2 stops
$989ANA
Find Deal
Wed, Sep 10 - Wed, Oct 15
United Airlines Logo
3:30 pm - 9:55 pmSTL-SGN
42h 25m2 stops
United Airlines Logo
11:15 pm - 3:38 pmSGN-STL
52h 23m3 stops
$1,012United Airlines
Find Deal
Mon, Oct 6 - Mon, Oct 13
 Logo
6:00 am - 10:45 pmSTL-SGN
28h 45m2 stops
 Logo
12:05 am - 11:56 pmSGN-STL
35h 51m2 stops
$1,024
Find Deal
Wed, Sep 10 - Tue, Oct 14
United Airlines Logo
5:43 pm - 9:55 pmSTL-SGN
40h 12m2 stops
United Airlines Logo
11:05 pm - 9:04 pmSGN-STL
33h 59m2 stops
$1,037United Airlines
Find Deal
Sat, Oct 18 - Sun, Oct 26
 Logo
6:30 pm - 11:40 amSTL-SGN
29h 10m2 stops
 Logo
12:50 pm - 3:38 pmSGN-STL
38h 48m3 stops
$1,223
Find Deal
Tue, Sep 9 - Mon, Oct 20
Cathay Pacific Logo
6:00 am - 8:25 pmSTL-SGN
50h 25m2 stops
Cathay Pacific Logo
6:20 pm - 11:04 pmSGN-STL
40h 44m2 stops
$1,666Cathay Pacific
Find Deal
Fri, May 23 - Fri, May 30
Delta Logo
6:00 am - 10:05 pmSTL-SGN
28h 05m2 stops
Delta Logo
7:35 am - 11:22 pmSGN-STL
27h 47m2 stops
$1,822Delta
Find Deal
Mon, Jun 2 - Thu, Jun 12
Cathay Pacific Logo
6:52 am - 5:20 pmSTL-SGN
46h 28m2 stops
Cathay Pacific Logo
11:05 am - 11:19 pmSGN-STL
24h 14m2 stops
$1,823Cathay Pacific
Find Deal
Sun, Jun 1 - Tue, Jul 1
Delta Logo
6:05 pm - 10:05 pmSTL-SGN
40h 00m2 stops
Delta Logo
7:35 am - 11:22 pmSGN-STL
27h 47m2 stops
$1,830Delta
Find Deal
Wed, Jun 4 - Thu, Jun 12
Useful Info

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

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

What is the cheapest month to fly from St. Louis to Vietnam?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Vietnam, 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 Vietnam is September, when tickets cost $1,091 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $1,921 and $1,747 respectively.

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

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

If you are looking for a flight deal from St. Louis to Vietnam, look for departures on Tuesdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Vietnam, Wednesday is the cheapest day to fly and Monday is the most expensive.

How far in advance should I book a flight from St. Louis to Vietnam?

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 Vietnam, 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 Vietnam, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.


Good to know

Low seasonMarch
High seasonJanuary
Cheapest flight$536
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from St. Louis to Ho Chi Minh City

FAQs - booking Vietnam flights

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

    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 Vietnam.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Vietnam 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 Vietnam?

    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 from St. Louis to Vietnam with an airline and back with another airline.

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

    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 from St. Louis to Vietnam up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Vietnam?

    The cheapest time of day to fly to Vietnam is generally in the evening, when round-trip flights cost $1,256 on average. Morning departures are around 10% more expensive than evening flights, on average. The most expensive time of day to fly to Vietnam is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,499.

Top 5 airlines serving from St. Louis to Vietnam

Need help choosing which airline to fly with from St. Louis to Vietnam? 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 1459 reviews
8.4Boarding
8.7Crew
7.7Food
7.8Entertainment
8.2Comfort
Airline reviews

Flight from New Delhi to Tokyo was mediocre. The seats were not of business class as we are used to. They were not wide enough. On the other hand the seats on the flight from Tokyo to San Francisco were excellent every thing were great except the food. Tokyo business lounge was excellent. The whole experience was great except the food on the plane. Will still fly JAL.

10.0 ExcellentAnonymous, Apr 2025HND - SFO
Read more Japan Airlines reviews

Flight from New Delhi to Tokyo was mediocre. The seats were not of business class as we are used to. They were not wide enough. On the other hand the seats on the flight from Tokyo to San Francisco were excellent every thing were great except the food. Tokyo business lounge was excellent. The whole experience was great except the food on the plane. Will still fly JAL.

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.

It's a domestic flight, but still the JAL quality shone through. The crew were polite and helpful and even prepared little gifts / souvenirs for the children on the flight, and everyone got a simple drink. The free wifi for entertainment on the personal device was also a great boon, and the shows surprisingly decent. Would recommend.

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.

Allow gold card holders (Group 1) to board with their guest like other One World carriers do

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.

Difficult to access advanced check-in online. No way to understand why it wouldn’t work. Call center not answering. Email for answers took days to respond, Kind service at the airport and on the flight made up for disappointing service before flight.

My wife and I liked everything except the cold breakfast

Excellent service and comfortable seats. Friendly and helpful staff. No food for a 3hr flight over lunch time which was surprising (or is that a feature of domestic flights in Japan?)

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.

I had to get rerouted because the weather delayed my flight enough to miss both of my connecting flights. I select nearly 2 hours on customer service trying to get rerouted and had to miss my first plane which took my luggage to San Francisco. Luckily, customer service sent me to the same airport but I had to ride 12 hours in economy after I paid extra for premium economy. Totally sucks that I overpaid. Customer service and airplane crew were great and really helpful though. Although I still hate how small the seat was, especially since I'm smaller than average, I can't imagine how much it would suck for an average sized person.

I stopped flying with United back in the nineties. Today's experience reminded me of why.

We have had better ANA experience. The crew are friendly.

Wonderfully pleasant experience. Good meal and beverage selections. Professional air staff.

Our bag was lost so that made unnecessary chaos On our trip

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

It was an overnight flight and I desperately needed coffee before we landed, but Delta does only one beverage service, and that is shortly after takeoff, not before landing at 5 am.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

Electric plugs didn't work. Entertainment system wasn't working

Several delays. Next flight was worse. Did not arrive home until 2am PT

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Took off on time and successfully avoided weather that looked to be a problem along the way

There were five broken seats on the plane. The crew was very rude in telling people they had to get off the plane and get a flight the next day. No call for volunteers, but telling people they had to get off. One woman was flying with her elderly mother and daughter and was told she had to leave or all three had to leave. Fortunately, a volunteer offered to stay. The situation was handled poorly.

The flight to Tokyo AA61 took off about two hours late, but then had to turn back. By that time the crew had to be replaced. Then they kept promising to take off in an hour, then in 3, then switch to the next day.

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