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

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

What airlines fly to Vietnam?

United Airlines, Japan Airlines and ANA 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 43% of people opting to fly with this airline when traveling to Vietnam. Keep in mind that there are 7 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 April 2026, there are 7 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.

$516 Cheap Flights from St. Louis to Vietnam in 2026

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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.

8:44 am - 9:55 pm

STL

SGN

25h 11m

2 stops

11:15 pm - 11:00 pm

SGN

STL

35h 45m

2 stops

$943United Airlines

Thu, Sep 10 - Mon, Sep 14

5:10 am - 12:15 am

STL

SGN

31h 05m

2 stops

11:15 pm - 9:22 pm

SGN

STL

34h 07m

2 stops

$946United Airlines

Thu, Sep 10 - Mon, Sep 14

5:00 am - 10:05 pm

STL

SGN

29h 05m

3 stops

11:15 pm - 7:31 pm

SGN

STL

32h 16m

2 stops

$947United Airlines

Thu, Sep 10 - Mon, Sep 14

4:44 pm - 10:05 pm

STL

SGN

41h 21m

3 stops

7:00 am - 6:17 pm

SGN

STL

23h 17m

2 stops

$950United Airlines

Mon, May 4 - Thu, May 21

7:34 pm - 4:50 pm

STL

HAN

33h 16m

2 stops

11:35 am - 11:59 pm

HAN

STL

48h 24m

2 stops

$1,068China Airlines

Sun, Sep 27 - Sun, Oct 18

3:24 pm - 10:30 am

STL

HAN

31h 06m

2 stops

11:30 am - 1:50 am

HAN

STL

26h 20m

2 stops

$1,118Multiple Airlines

Sun, Sep 27 - Sun, Oct 18

12:27 pm - 8:05 am

STL

HAN

31h 38m

2 stops

7:30 pm - 10:17 pm

HAN

STL

38h 47m

2 stops

$1,323Qatar Airways

Tue, Apr 21 - Tue, Apr 28

8:35 am - 4:30 pm

STL

DAD

43h 55m

2 stops

10:00 am - 11:15 pm

DAD

STL

25h 15m

2 stops

$1,539Multiple Airlines

Wed, May 13 - Wed, May 20

5:10 am - 9:35 pm

STL

DAD

28h 25m

2 stops

11:00 pm - 2:02 pm

DAD

STL

51h 02m

2 stops

$2,189Asiana Airlines

Mon, Jul 6 - Thu, Aug 6

5:10 am - 9:35 pm

STL

DAD

28h 25m

3 stops

11:00 pm - 2:02 pm

DAD

STL

51h 02m

2 stops

$2,193Asiana Airlines

Mon, Jul 6 - Thu, Aug 6

United Airlines flights from St. Louis to Vietnam

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

United Airlines

Sep 10

STL8:44 amLambert-St Louis

25h 11m

2 stops

SGN9:55 pmHo Chi Minh City

Sep 14

SGN11:15 pmHo Chi Minh City

35h 45m

2 stops

STL11:00 pmLambert-St Louis

$943

United Airlines

Sep 10

STL5:10 amLambert-St Louis

31h 05m

2 stops

SGN12:15 amHo Chi Minh City

Sep 14

SGN11:15 pmHo Chi Minh City

34h 07m

2 stops

STL9:22 pmLambert-St Louis

$946

United Airlines

Sep 10

STL5:00 amLambert-St Louis

29h 05m

3 stops

SGN10:05 pmHo Chi Minh City

Sep 14

SGN11:15 pmHo Chi Minh City

32h 16m

2 stops

STL7:31 pmLambert-St Louis

$947

ANA flights from St. Louis to Vietnam

Our best ANA deals on St. Louis to Vietnam flight tickets

ANA

May 4

STL7:45 amLambert-St Louis

26h 10m

2 stops

SGN9:55 pmHo Chi Minh City

May 21

SGN7:00 amHo Chi Minh City

23h 17m

2 stops

STL6:17 pmLambert-St Louis

$1,113

ANA

Jul 28

STL9:23 amLambert-St Louis

24h 32m

2 stops

SGN9:55 pmHo Chi Minh City

Sep 8

SGN11:15 pmHo Chi Minh City

26h 53m

2 stops

STL2:08 pmLambert-St Louis

$1,151

ANA

Jul 27

STL3:10 pmLambert-St Louis

42h 45m

2 stops

SGN9:55 pmHo Chi Minh City

Sep 7

SGN11:15 pmHo Chi Minh City

31h 01m

2 stops

STL6:16 pmLambert-St Louis

$1,164

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Thu 9/10

8:44 am-9:55 pm

2 stops25h 11m

Ho Chi Minh City

Mon 9/14

11:15 pm-11:00 pm

2 stops35h 45m

$943

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Thu 9/10

5:10 am-12:15 am

2 stops31h 05m

Ho Chi Minh City

Mon 9/14

11:15 pm-9:22 pm

2 stops34h 07m

$946

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Thu 9/10

5:00 am-10:05 pm

3 stops29h 05m

Ho Chi Minh City

Mon 9/14

11:15 pm-7:31 pm

2 stops32h 16m

$947

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 5/4

4:44 pm-10:05 pm

3 stops41h 21m

Ho Chi Minh City

Thu 5/21

7:00 am-6:17 pm

2 stops23h 17m

$950

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 9/27

7:34 pm-4:50 pm

2 stops33h 16m

Hanoi Noibai

Sun 10/18

11:35 am-11:59 pm

2 stops48h 24m

$1,068

Quickest round-trip

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 9/27

3:24 pm-10:30 am

2 stops31h 06m

Hanoi Noibai

Sun 10/18

11:30 am-1:50 am

2 stops26h 20m

$1,118

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 4/21

12:27 pm-8:05 am

2 stops31h 38m

Hanoi Noibai

Tue 4/28

7:30 pm-10:17 pm

2 stops38h 47m

$1,323

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Wed 5/13

8:35 am-4:30 pm

2 stops43h 55m

Da Nang

Wed 5/20

10:00 am-11:15 pm

2 stops25h 15m

$1,539

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Mon 7/6

5:10 am-9:35 pm

2 stops28h 25m

Da Nang

Thu 8/6

11:00 pm-2:02 pm

2 stops51h 02m

$2,189

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Mon 7/6

5:10 am-9:35 pm

3 stops28h 25m

Da Nang

Thu 8/6

11:00 pm-2:02 pm

2 stops51h 02m

$2,193

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 $986. 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 $989.

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 $1,198 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 $947 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

Fastest flight time	22h 17m
Direct flights	None

The fastest flight from St. Louis to Vietnam takes 22h 17m

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

Search flight deals

Frequently asked questions about flying 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 April 2026, there are 7 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
American Airlines	PriceFrom $903	Free Cancellation	Rating 7.1 11,548 reviews	Search American Airlines flights
China Airlines	PriceFrom $903	Free Cancellation	Rating 8.3 815 reviews	Search China Airlines flights
Cathay Pacific	PriceFrom $915	Free Cancellation	Rating 7.6 1,239 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $921	Free Cancellation	Rating 8.3 1,761 reviews	Search Japan Airlines flights
United Airlines	PriceFrom $923	Free Cancellation	Rating 7.4 9,534 reviews	Search United Airlines flights
Delta	PriceFrom $960	Free Cancellation	Rating 7.9 8,372 reviews	Search Delta flights
ANA	PriceFrom $984	Free Cancellation	Rating 8.4 1,163 reviews	Search ANA 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.