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Cheap flights from St. Louis to Vientiane from $1,924

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Vientiane departing on 5/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Find the cheapest flights from St. Louis to Vientiane

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:36 pm - 12:40 pm
STL
-
VTE
34h 04m
3 stops
Multiple Airlines Logo
8:30 pm - 8:30 pm
VTE
-
STL
36h 00m
3 stops
$1,924Multiple Airlines
Thu, May 21 - Tue, Jun 2
Multiple Airlines Logo
2:47 pm - 1:05 pm
STL
-
VTE
34h 18m
3 stops
Multiple Airlines Logo
8:30 pm - 7:30 pm
VTE
-
STL
36h 00m
3 stops
$1,960Multiple Airlines
Fri, Oct 23 - Thu, Nov 19
Multiple Airlines Logo
1:45 pm - 11:00 am
STL
-
VTE
33h 15m
3 stops
Multiple Airlines Logo
8:30 pm - 7:21 pm
VTE
-
STL
34h 51m
3 stops
$2,015Multiple Airlines
Mon, Jun 15 - Mon, Jun 22
Multiple Airlines Logo
1:45 pm - 12:40 pm
STL
-
VTE
34h 55m
3 stops
Multiple Airlines Logo
8:30 pm - 7:36 pm
VTE
-
STL
35h 06m
3 stops
$2,236Multiple Airlines
Sat, May 30 - Fri, Jun 26
Multiple Airlines Logo
7:20 pm - 7:45 pm
STL
-
VTE
36h 25m
3 stops
Multiple Airlines Logo
8:30 pm - 8:30 pm
VTE
-
STL
36h 00m
3 stops
$2,463Multiple Airlines
Thu, May 21 - Tue, Jun 2
Multiple Airlines Logo
1:45 pm - 12:40 pm
STL
-
VTE
34h 55m
3 stops
Multiple Airlines Logo
8:30 pm - 8:30 pm
VTE
-
STL
36h 00m
3 stops
$2,568Multiple Airlines
Thu, May 21 - Tue, Jun 2
Multiple Airlines Logo
7:20 pm - 7:45 pm
STL
-
VTE
36h 25m
3 stops
Multiple Airlines Logo
8:30 pm - 8:30 pm
VTE
-
STL
36h 00m
3 stops
$2,646Multiple Airlines
Thu, May 21 - Tue, Jun 2
Multiple Airlines Logo
7:20 pm - 7:45 pm
STL
-
VTE
36h 25m
3 stops
Multiple Airlines Logo
8:30 pm - 8:30 pm
VTE
-
STL
36h 00m
3 stops
$2,673Multiple Airlines
Thu, May 21 - Tue, Jun 2
Multiple Airlines Logo
8:55 am - 9:05 am
STL
-
VTE
36h 10m
3 stops
Multiple Airlines Logo
1:05 am - 3:30 pm
VTE
-
STL
51h 25m
2 stops
$3,195Multiple Airlines
Fri, Oct 23 - Wed, Nov 18
Multiple Airlines Logo
8:55 am - 11:50 pm
STL
-
VTE
26h 55m
2 stops
Multiple Airlines Logo
1:05 am - 3:30 pm
VTE
-
STL
51h 25m
2 stops
$3,280Multiple Airlines
Fri, Oct 23 - Wed, Nov 18

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Customize your flight search to find flights from St. Louis to Vientiane that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 6, 2026.
Use the filters below to find and compare flights from St. Louis to Vientiane that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Thu 5/21

2:36 pm-12:40 pm

3 stops34h 04m

Vientiane Wattay

Tue 6/2

8:30 pm-8:30 pm

3 stops36h 00m

$1,924

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Fri 10/23

2:47 pm-1:05 pm

3 stops34h 18m

Vientiane Wattay

Thu 11/19

8:30 pm-7:30 pm

3 stops36h 00m

$1,960
Quickest round-trip

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Mon 6/15

1:45 pm-11:00 am

3 stops33h 15m

Vientiane Wattay

Mon 6/22

8:30 pm-7:21 pm

3 stops34h 51m

$2,015

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Sat 5/30

1:45 pm-12:40 pm

3 stops34h 55m

Vientiane Wattay

Fri 6/26

8:30 pm-7:36 pm

3 stops35h 06m

$2,236

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Thu 5/21

7:20 pm-7:45 pm

3 stops36h 25m

Vientiane Wattay

Tue 6/2

8:30 pm-8:30 pm

3 stops36h 00m

$2,463

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Thu 5/21

1:45 pm-12:40 pm

3 stops34h 55m

Vientiane Wattay

Tue 6/2

8:30 pm-8:30 pm

3 stops36h 00m

$2,568

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Thu 5/21

7:20 pm-7:45 pm

3 stops36h 25m

Vientiane Wattay

Tue 6/2

8:30 pm-8:30 pm

3 stops36h 00m

$2,646

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Thu 5/21

7:20 pm-7:45 pm

3 stops36h 25m

Vientiane Wattay

Tue 6/2

8:30 pm-8:30 pm

3 stops36h 00m

$2,673

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Fri 10/23

8:55 am-9:05 am

3 stops36h 10m

Vientiane Wattay

Wed 11/18

1:05 am-3:30 pm

2 stops51h 25m

$3,195

St. LouisVientiane

STL - VTE

STLVTE

Lambert-St Louis

Fri 10/23

8:55 am-11:50 pm

2 stops26h 55m

Vientiane Wattay

Wed 11/18

1:05 am-3:30 pm

2 stops51h 25m

$3,280

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from St. Louis to Vientiane

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Vientiane according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Vientiane (STL to VTE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Vientiane

Fastest flight time

36h 25m

Direct flights

None
The fastest flight from St. Louis to Vientiane takes 36h 25m
There are no direct flights from St. Louis to Vientiane. There are no popular flight routes from St. Louis to Vientiane.
Search flight deals

Frequently asked questions about flying from St. Louis to Vientiane

  • How far is Lambert-St Louis to Vientiane Wattay by plane?

    The straight-line distance from Lambert-St Louis to Vientiane Wattay is 8433.7 mi. Typically, this will take 36h 25m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Vientiane Wattay Airport?

    Prices for flights from Lambert-St Louis Airport to Vientiane Wattay Airport are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Vientiane Wattay Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Vientiane Wattay Airport.

  • What documentation or ID do you need to fly to Vientiane Wattay Airport?

    The required travel and health documents for your Vientiane Wattay Airport 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 Vientiane Wattay Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Frequently asked questions about flying from St. Louis to Vientiane

  • How do I get Price Alerts for flights from St. Louis to Vientiane?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to St. Louis from Vientiane. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from St. Louis to Vientiane with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Vientiane?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Vientiane. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Vientiane with flexible booking policies on momondo?

momondo does allow users to show only those flights to Vientiane from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Vientiane?

momondo provides multiple filters to help you find the best flight to Vientiane from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to Vientiane right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Vientiane, momondo offers a useful price alert feature which will track prices for flights to Vientiane from St. Louis and alert you when they change.

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