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

United Airlines, Korean Air, and China 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 47% 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 May 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.

$559 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.

7:00 am - 6:55 am

STL

HAN

34h 55m

2 stops

8:55 am - 11:44 pm

HAN

STL

50h 49m

2 stops

$1,073Multiple Airlines

Wed, Nov 4 - Thu, Mar 25

7:00 am - 7:45 pm

STL

HAN

47h 45m

2 stops

8:55 am - 11:44 pm

HAN

STL

50h 49m

2 stops

$1,076Multiple Airlines

Tue, Nov 3 - Thu, Mar 25

8:00 am - 9:55 pm

STL

SGN

25h 55m

2 stops

11:15 pm - 9:24 pm

SGN

STL

34h 09m

2 stops

$1,118United Airlines

Wed, Sep 16 - Wed, Oct 7

6:00 am - 10:05 pm

STL

SGN

28h 05m

3 stops

11:15 pm - 9:21 pm

SGN

STL

34h 06m

2 stops

$1,122United Airlines

Wed, Sep 16 - Wed, Oct 7

1:20 pm - 6:55 am

STL

HAN

28h 35m

2 stops

1:45 am - 11:44 pm

HAN

STL

33h 59m

2 stops

$1,193Qatar Airways

Wed, Nov 4 - Tue, Mar 23

7:00 am - 6:55 am

STL

HAN

34h 55m

2 stops

7:30 pm - 11:44 pm

HAN

STL

40h 14m

2 stops

$1,201Qatar Airways

Mon, Nov 2 - Mon, Mar 29

7:20 am - 2:15 pm

STL

DAD

42h 55m

2 stops

3:45 pm - 12:56 pm

DAD

STL

34h 11m

2 stops

$1,379Korean Air

Thu, Oct 29 - Mon, Nov 2

8:50 am - 9:05 pm

STL

DAD

24h 15m

2 stops

3:55 pm - 11:37 pm

DAD

STL

43h 42m

2 stops

$1,508Korean Air

Sun, Sep 20 - Wed, Sep 23

5:10 am - 9:35 pm

STL

DAD

28h 25m

3 stops

11:00 pm - 11:57 pm

DAD

STL

36h 57m

3 stops

$1,879Air Canada

Mon, Jun 1 - Mon, Jun 15

5:10 am - 9:05 pm

STL

DAD

27h 55m

3 stops

10:55 pm - 11:57 pm

DAD

STL

37h 02m

3 stops

$2,037Air Canada

Wed, Jun 17 - Wed, Jun 24

ANA flights from St. Louis to Vietnam

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

ANA

Sep 20

STL4:40 pmLambert-St Louis

41h 25m

1 stop

SGN10:05 pmHo Chi Minh City

Oct 31

SGN7:30 amHo Chi Minh City

22h 23m

2 stops

STL5:53 pmLambert-St Louis

$1,209

ANA

Jul 13

STL9:15 amLambert-St Louis

48h 40m

2 stops

SGN9:55 pmHo Chi Minh City

Sep 28

SGN11:15 pmHo Chi Minh City

26h 56m

2 stops

STL2:11 pmLambert-St Louis

$1,210

ANA

Jul 7

STL7:23 pmLambert-St Louis

38h 32m

2 stops

SGN9:55 pmHo Chi Minh City

Sep 21

SGN11:15 pmHo Chi Minh City

31h 16m

2 stops

STL6:31 pmLambert-St Louis

$1,278

Delta flights from St. Louis to Vietnam

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

Delta

Nov 4

STL6:45 amLambert-St Louis

27h 35m

2 stops

SGN11:20 pmHo Chi Minh City

Nov 17

SGN8:00 amHo Chi Minh City

25h 49m

2 stops

STL8:49 pmLambert-St Louis

$1,274

Delta

Oct 31

STL7:30 amLambert-St Louis

27h 50m

2 stops

SGN11:20 pmHo Chi Minh City

Nov 17

SGN8:00 amHo Chi Minh City

23h 56m

2 stops

STL6:56 pmLambert-St Louis

$1,324

Delta

Jun 28

STL6:00 amLambert-St Louis

27h 05m

2 stops

DAD9:05 pmDa Nang

Jul 13

DAD10:55 pmDa Nang

37h 46m

2 stops

STL12:41 amLambert-St Louis

$2,617

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 11/4

7:00 am-6:55 am

2 stops34h 55m

Hanoi Noibai

Thu 3/25

8:55 am-11:44 pm

2 stops50h 49m

$1,073

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 11/3

7:00 am-7:45 pm

2 stops47h 45m

Hanoi Noibai

Thu 3/25

8:55 am-11:44 pm

2 stops50h 49m

$1,076

Quickest round-trip

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Wed 9/16

8:00 am-9:55 pm

2 stops25h 55m

Ho Chi Minh City

Wed 10/7

11:15 pm-9:24 pm

2 stops34h 09m

$1,118

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Wed 9/16

6:00 am-10:05 pm

3 stops28h 05m

Ho Chi Minh City

Wed 10/7

11:15 pm-9:21 pm

2 stops34h 06m

$1,122

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 11/4

1:20 pm-6:55 am

2 stops28h 35m

Hanoi Noibai

Tue 3/23

1:45 am-11:44 pm

2 stops33h 59m

$1,193

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 11/2

7:00 am-6:55 am

2 stops34h 55m

Hanoi Noibai

Mon 3/29

7:30 pm-11:44 pm

2 stops40h 14m

$1,201

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Thu 10/29

7:20 am-2:15 pm

2 stops42h 55m

Da Nang

Mon 11/2

3:45 pm-12:56 pm

2 stops34h 11m

$1,379

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Sun 9/20

8:50 am-9:05 pm

2 stops24h 15m

Da Nang

Wed 9/23

3:55 pm-11:37 pm

2 stops43h 42m

$1,508

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Mon 6/1

5:10 am-9:35 pm

3 stops28h 25m

Da Nang

Mon 6/15

11:00 pm-11:57 pm

3 stops36h 57m

$1,879

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Wed 6/17

5:10 am-9:05 pm

3 stops27h 55m

Da Nang

Wed 6/24

10:55 pm-11:57 pm

3 stops37h 02m

$2,037

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 July is, on average, the cheapest month to fly to Vietnam from St. Louis, with most prices found around $539. If you don’t want to visit Vietnam in July, then you should wait until May to fly from St. Louis, when ticket prices are also cheap, with an average price of $631.

How far in advance should I book a flight from St. Louis 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 $1,207 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	25h 15m
Direct flights	None

The fastest flight from St. Louis to Vietnam takes 25h 15m

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 May 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 11,644 reviews	Search American Airlines flights
China Airlines	PriceFrom $903	Free Cancellation	Rating 8.3 826 reviews	Search China Airlines flights
Japan Airlines	PriceFrom $914	Free Cancellation	Rating 8.3 1,825 reviews	Search Japan Airlines flights
Cathay Pacific	PriceFrom $915	Free Cancellation	Rating 7.6 1,342 reviews	Search Cathay Pacific flights
United Airlines	PriceFrom $923	Free Cancellation	Rating 7.4 9,751 reviews	Search United Airlines flights
Delta	PriceFrom $960	Free Cancellation	Rating 7.9 8,445 reviews	Search Delta flights
ANA	PriceFrom $986	Free Cancellation	Rating 8.3 1,212 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.