What is the cheapest airline that flies from Lambert-St Louis to Vietnam?

Japan Airlines, American Airlines, and United Airlines are the most popular carriers operating from Lambert-St Louis to Vietnam

What airlines fly to Vietnam?

United Airlines, ANA and Japan Airlines are the top three most popular airlines that fly to Vietnam from St. Louis according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Vietnam. Keep in mind that there are 10 different airlines that fly to Vietnam on a routine basis, so you have a few additional options to choose from.

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 November 2025, there are 10 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.

$430 Cheap Flights from St. Louis to Vietnam in 2025/26

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Find the cheapest flights from St. Louis to Vietnam

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:50 pm - 10:00 amSTL-SGN

30h 10m2 stops

11:00 am - 1:52 pmSGN-STL

39h 52m2 stops

$905China Airlines

Find Deal

Mon, Jan 12 - Mon, Feb 16

2:50 pm - 4:50 pmSTL-SGN

37h 00m2 stops

5:30 pm - 2:11 pmSGN-STL

32h 41m2 stops

$910China Airlines

Find Deal

Tue, Jan 20 - Mon, Apr 27

7:04 am - 12:20 amSTL-SGN

28h 16m2 stops

11:05 am - 11:24 pmSGN-STL

48h 19m2 stops

$936Cathay Pacific

Find Deal

Mon, Jan 19 - Mon, Apr 27

6:44 pm - 12:20 amSTL-SGN

40h 36m2 stops

11:35 am - 4:57 pmSGN-STL

42h 22m2 stops

$942Cathay Pacific

Find Deal

Sun, Feb 1 - Sun, Mar 8

3:20 pm - 5:55 amSTL-SGN

25h 35m2 stops

7:50 am - 1:49 pmSGN-STL

42h 59m2 stops

$949Japan Airlines

Find Deal

Tue, Jan 20 - Mon, Feb 23

6:00 am - 9:50 pmSTL-SGN

26h 50m2 stops

11:15 pm - 9:55 pmSGN-STL

34h 40m2 stops

$966United Airlines

Find Deal

Wed, Jan 21 - Tue, Mar 31

6:45 am - 12:15 amSTL-SGN

28h 30m2 stops

11:15 pm - 9:55 pmSGN-STL

34h 40m2 stops

$969United Airlines

Find Deal

Mon, Jan 19 - Tue, Mar 31

7:00 am - 10:30 pmSTL-HAN

26h 30m2 stops

11:55 pm - 11:59 pmHAN-STL

37h 04m2 stops

$1,066Japan Airlines

Find Deal

Tue, Dec 2 - Wed, Dec 10

6:30 am - 11:05 pmSTL-HAN

27h 35m2 stops

12:25 am - 12:15 pmHAN-STL

48h 50m2 stops

$1,615ANA

Find Deal

Tue, Dec 2 - Sat, Dec 6

8:00 am - 11:05 pmSTL-HAN

26h 05m2 stops

12:25 am - 12:15 pmHAN-STL

48h 50m2 stops

$1,765ANA

Find Deal

Wed, Dec 3 - Sat, Dec 6

United Airlines flights from St. Louis to Vietnam

Our best United Airlines deals on St. Louis to Vietnam flight tickets

United Airlines

Nov 13

STL6:30 amLambert-St Louis

28h 45m

3 stops

SGN12:15 amHo Chi Minh City

Dec 15

SGN11:05 pmHo Chi Minh City

28h 20m

2 stops

STL2:25 pmLambert-St Louis

$923

Find similar

United Airlines

Jan 21

STL6:00 amLambert-St Louis

26h 50m

2 stops

SGN9:50 pmHo Chi Minh City

Mar 31

SGN11:15 pmHo Chi Minh City

34h 40m

2 stops

STL9:55 pmLambert-St Louis

$966

Find similar

United Airlines

Jan 19

STL6:45 amLambert-St Louis

28h 30m

2 stops

SGN12:15 amHo Chi Minh City

Mar 31

SGN11:15 pmHo Chi Minh City

34h 40m

2 stops

STL9:55 pmLambert-St Louis

$969

Find similar

EVA Air flights from St. Louis to Vietnam

Our best EVA Air deals on St. Louis to Vietnam flight tickets

EVA Air

Jan 20

STL2:50 pmLambert-St Louis

31h 45m

2 stops

SGN11:35 amHo Chi Minh City

Apr 26

SGN1:50 amHo Chi Minh City

58h 05m

2 stops

STL11:55 pmLambert-St Louis

$971

Find similar

EVA Air

Nov 13

STL7:00 amLambert-St Louis

39h 35m

2 stops

SGN11:35 amHo Chi Minh City

Dec 14

SGN1:55 amHo Chi Minh City

49h 32m

2 stops

STL2:27 pmLambert-St Louis

$975

Find similar

EVA Air

Mar 1

STL2:55 pmLambert-St Louis

31h 40m

2 stops

SGN11:35 amHo Chi Minh City

Mar 13

SGN1:55 amHo Chi Minh City

58h 01m

2 stops

STL11:56 pmLambert-St Louis

$1,002

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 1/12

2:50 pm-10:00 am

2 stops30h 10m

Ho Chi Minh City

Mon 2/16

11:00 am-1:52 pm

2 stops39h 52m

$905

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 1/20

2:50 pm-4:50 pm

2 stops37h 00m

Ho Chi Minh City

Mon 4/27

5:30 pm-2:11 pm

2 stops32h 41m

$910

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 1/19

7:04 am-12:20 am

2 stops28h 16m

Ho Chi Minh City

Mon 4/27

11:05 am-11:24 pm

2 stops48h 19m

$936

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Sun 2/1

6:44 pm-12:20 am

2 stops40h 36m

Ho Chi Minh City

Sun 3/8

11:35 am-4:57 pm

2 stops42h 22m

$942

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 1/20

3:20 pm-5:55 am

2 stops25h 35m

Ho Chi Minh City

Mon 2/23

7:50 am-1:49 pm

2 stops42h 59m

$949

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Wed 1/21

6:00 am-9:50 pm

2 stops26h 50m

Ho Chi Minh City

Tue 3/31

11:15 pm-9:55 pm

2 stops34h 40m

$966

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 1/19

6:45 am-12:15 am

2 stops28h 30m

Ho Chi Minh City

Tue 3/31

11:15 pm-9:55 pm

2 stops34h 40m

$969

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 12/2

7:00 am-10:30 pm

2 stops26h 30m

Hanoi Noibai

Wed 12/10

11:55 pm-11:59 pm

2 stops37h 04m

$1,066

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 12/2

6:30 am-11:05 pm

2 stops27h 35m

Hanoi Noibai

Sat 12/6

12:25 am-12:15 pm

2 stops48h 50m

$1,615

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 12/3

8:00 am-11:05 pm

2 stops26h 05m

Hanoi Noibai

Sat 12/6

12:25 am-12:15 pm

2 stops48h 50m

$1,765

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Vietnam?

The month of November is, on average, the cheapest month to fly to Vietnam from St. Louis, with most prices found around $1,003. If you don’t want to visit Vietnam in November, then you should wait until September to fly from St. Louis, when ticket prices are also cheap, with an average price of $1,022.

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 weeks ahead of your departure date. In general, you can expect to find flights to Vietnam for around $1,263 when searching 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 $1,072 on momondo.

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

Direct flights	None

There are no direct flights from St. Louis to Vietnam. There are no popular flight routes from St. Louis to Vietnam.

Search flight deals

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 November 2025, there are 10 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
Korean Air	PriceFrom $761	Free Cancellation	Rating 8.4 1,160 reviews	Search Korean Air flights
Cathay Pacific	PriceFrom $915	Free Cancellation	Rating 7.6 1,055 reviews	Search Cathay Pacific flights
China Airlines	PriceFrom $928	Free Cancellation	Rating 8.3 778 reviews	Search China Airlines flights
Japan Airlines	PriceFrom $949	Free Cancellation	Rating 8.3 1,604 reviews	Search Japan Airlines flights
United Airlines	PriceFrom $962	Free Cancellation	Rating 7.4 9,004 reviews	Search United Airlines flights
American Airlines	PriceFrom $966	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
ANA	PriceFrom $986	Free Cancellation	Rating 8.4 1,003 reviews	Search ANA flights
Delta	PriceFrom $990	Free Cancellation	Rating 7.9 8,001 reviews	Search Delta flights
EVA Air	PriceFrom $1,008	Free Cancellation	Rating 8.4 1,270 reviews	Search EVA Air flights
Air Canada	PriceFrom $1,437	Free Cancellation	Rating 7.1 10,415 reviews	Search Air Canada flights

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.