Cheap flights from St. Louis to Vietnam from $525
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 Vietnam departing on 8/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from St. Louis to Vietnam
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 Vietnam?
The month of September is, on average, the cheapest month to fly to Vietnam from St. Louis, with most prices found around $1,037. If you don’t want to visit Vietnam in September, then you should wait until April to fly from St. Louis, when ticket prices are also cheap, with an average price of $1,118.
What is the cheapest day to depart on your flight to Vietnam?
According to our data, Tuesday is the cheapest day to fly to Vietnam from St. Louis. The lowest ticket price found for a Tuesday departure recently was $1,258. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Vietnam on Friday is $1,572.
What is the cheapest time of day to depart on your flight to Vietnam?
Flying to Vietnam from St. Louis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,256 when looking at flights departing in the afternoon. At noon is when there is more demand to fly to Vietnam, so prices are often more expensive at around $1,499 per ticket.
How far in advance should I book a flight to Vietnam?
You are more likely to see cheaper flights to Vietnam from St. Louis when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to Vietnam for around $1,340 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Vietnam from St. Louis for as low as $1,132 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Vietnam?
ANA and United Airlines are the most popular carriers operating from Lambert-St Louis to Vietnam
What airlines fly to Vietnam?
ANA, Japan Airlines and United Airlines are the top three most popular airlines that fly to Vietnam from St. Louis according to our data. ANA is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Vietnam. Keep in mind that there are 9 different airlines that fly to Vietnam on a routine basis, so you have a few additional options to choose from.
Cheap St. Louis to Vietnam flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Vietnam
When did momondo last update prices for flights from Lambert-St Louis Airport to Vietnam?
Prices for flights from Lambert-St Louis Airport to Vietnam are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Vietnam?
As of June 2025, there are 9 operators available to choose from for flights from Lambert-St Louis Airport to Vietnam.
How old do you have to be to fly from Lambert-St Louis Airport to Vietnam?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Vietnam.
What documentation or ID do you need to fly to Vietnam?
The required travel and health documents for your Vietnam trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Vietnam. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
Best airlines flying from St. Louis to Vietnam
Compare and see reviews for airlines that fly from St. Louis to Vietnam with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $761 | Free Cancellation | Rating 8.4 1,090 reviews | |||
| PriceFrom $920 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $989 | Free Cancellation | Rating 8.3 886 reviews | |||
| PriceFrom $990 | Free Cancellation | Rating 8.3 1,494 reviews | |||
| PriceFrom $995 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $1,042 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $1,065 | Free Cancellation | Rating 7.3 3,852 reviews | |||
| PriceFrom $1,246 | Free Cancellation | Rating 7.5 893 reviews | |||
| PriceFrom $1,437 | Free Cancellation | Rating 7.1 9,554 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Vietnam?
It is quick and easy to find St. Louis to Vietnam flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Vietnam that suits you.
Can I find flights from St. Louis to Vietnam with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Vietnam from St. Louis with this policy.
How can momondo help me find flights from St. Louis to Vietnam?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Vietnam.
I’m not ready to book a flight from St. Louis to Vietnam right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of St. Louis to Vietnam flights. All you need is a valid email address and we will do the rest; it is that quick and easy.