Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from St. Louis to Vientiane from $790

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 Vientiane departing on 11/13. 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
1 adult, Economy, 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
8:55 am - 11:50 pmSTL  Lambert-St Louis-VTE Vientiane Wattay
26h 55m2 stops Toronto Pearson Intl Incheon Intl
Multiple Airlines Logo
12:50 am - 8:20 pmVTE  Vientiane Wattay-STL Lambert-St Louis
55h 30m2 stops Incheon Intl Toronto Pearson Intl
$1,474Multiple Airlines
Thu, Sep 3 - Sun, Sep 13
Multiple Airlines Logo
7:00 am - 11:15 amSTL  Lambert-St Louis-VTE Vientiane Wattay
39h 15m3 stops Seattle/Tacoma Intl Doha Hamad Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
8:30 pm - 7:33 pmVTE  Vientiane Wattay-STL Lambert-St Louis
35h 03m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Chicago O'Hare Intl
$1,533Multiple Airlines
Tue, Nov 10 - Wed, Apr 28
Multiple Airlines Logo
7:00 am - 11:15 amSTL  Lambert-St Louis-VTE Vientiane Wattay
39h 15m3 stops Seattle/Tacoma Intl Doha Hamad Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
8:30 pm - 7:33 pmVTE  Vientiane Wattay-STL Lambert-St Louis
35h 03m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Chicago O'Hare Intl
$1,547Multiple Airlines
Tue, Nov 10 - Wed, Apr 28
Multiple Airlines Logo
9:32 am - 10:35 amSTL  Lambert-St Louis-VTE Vientiane Wattay
37h 03m3 stops Chicago O'Hare Intl Doha Hamad Intl Hanoi Noibai
Multiple Airlines Logo
8:30 pm - 7:07 pmVTE  Vientiane Wattay-STL Lambert-St Louis
34h 37m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Dallas/Fort Worth
$1,549Multiple Airlines
Thu, Sep 3 - Mon, Sep 14
Multiple Airlines Logo
2:40 pm - 11:50 pmSTL  Lambert-St Louis-VTE Vientiane Wattay
45h 10m2 stops Toronto Pearson Intl Incheon Intl
Multiple Airlines Logo
12:50 am - 8:20 pmVTE  Vientiane Wattay-STL Lambert-St Louis
55h 30m2 stops Incheon Intl Toronto Pearson Intl
$1,817Multiple Airlines
Fri, Sep 4 - Sun, Sep 13
Multiple Airlines Logo
1:25 pm - 12:40 pmSTL  Lambert-St Louis-VTE Vientiane Wattay
35h 15m3 stops Chicago O'Hare Intl Doha Hamad Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
8:30 pm - 7:07 pmVTE  Vientiane Wattay-STL Lambert-St Louis
34h 37m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Dallas/Fort Worth
$2,014Multiple Airlines
Fri, Sep 4 - Mon, Sep 14
Multiple Airlines Logo
7:36 pm - 12:40 pmSTL  Lambert-St Louis-VTE Vientiane Wattay
29h 04m3 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi
Multiple Airlines Logo
3:50 pm - 8:20 pmVTE  Vientiane Wattay-STL Lambert-St Louis
64h 30m2 stops Guangzhou Baiyun Toronto Pearson Intl
$3,210Multiple Airlines
Thu, Sep 3 - Mon, Sep 14
Multiple Airlines Logo
9:35 pm - 7:45 pmSTL  Lambert-St Louis-VTE Vientiane Wattay
34h 10m2 stops London Heathrow Bangkok Suvarnabhumi
Multiple Airlines Logo
8:20 pm - 8:20 pmVTE  Vientiane Wattay-STL Lambert-St Louis
36h 00m3 stops Hanoi Noibai Tokyo Haneda Toronto Pearson Intl
$3,359Multiple Airlines
Fri, Sep 4 - Mon, Sep 14
China Southern Logo
4:05 pm - 3:05 pmSTL  Lambert-St Louis-VTE Vientiane Wattay
34h 00m2 stops Toronto Pearson Intl Guangzhou Baiyun
China Southern Logo
3:50 pm - 3:09 pmVTE  Vientiane Wattay-STL Lambert-St Louis
59h 19m2 stops Guangzhou Baiyun Toronto Pearson Intl
$3,845China Southern
Tue, Nov 10 - Wed, Apr 28
Multiple Airlines Logo
4:05 pm - 10:30 amSTL  Lambert-St Louis-VTE Vientiane Wattay
29h 25m2 stops Toronto Pearson Intl Guangzhou Baiyun
Multiple Airlines Logo
3:50 pm - 3:09 pmVTE  Vientiane Wattay-STL Lambert-St Louis
59h 19m2 stops Guangzhou Baiyun Toronto Pearson Intl
$3,847Multiple Airlines
Tue, Nov 10 - Wed, Apr 28

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

momondo Fare Finder

 
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 August 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 Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Thu 9/3

8:55 am-11:50 pm

2 stops26h 55m

Vientiane Wattay

Sun 9/13

12:50 am-8:20 pm

2 stops55h 30m

$1,474

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Tue 11/10

7:00 am-11:15 am

3 stops39h 15m

Vientiane Wattay

Wed 4/28

8:30 pm-7:33 pm

3 stops35h 03m

$1,533

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Tue 11/10

7:00 am-11:15 am

3 stops39h 15m

Vientiane Wattay

Wed 4/28

8:30 pm-7:33 pm

3 stops35h 03m

$1,547

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Thu 9/3

9:32 am-10:35 am

3 stops37h 03m

Vientiane Wattay

Mon 9/14

8:30 pm-7:07 pm

3 stops34h 37m

$1,549

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Fri 9/4

2:40 pm-11:50 pm

2 stops45h 10m

Vientiane Wattay

Sun 9/13

12:50 am-8:20 pm

2 stops55h 30m

$1,817
Quickest round-trip

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Fri 9/4

1:25 pm-12:40 pm

3 stops35h 15m

Vientiane Wattay

Mon 9/14

8:30 pm-7:07 pm

3 stops34h 37m

$2,014

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Thu 9/3

7:36 pm-12:40 pm

3 stops29h 04m

Vientiane Wattay

Mon 9/14

3:50 pm-8:20 pm

2 stops64h 30m

$3,210

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Fri 9/4

9:35 pm-7:45 pm

2 stops34h 10m

Vientiane Wattay

Mon 9/14

8:20 pm-8:20 pm

3 stops36h 00m

$3,359

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Tue 11/10

4:05 pm-3:05 pm

2 stops34h 00m

Vientiane Wattay

Wed 4/28

3:50 pm-3:09 pm

2 stops59h 19m

$3,845

St. LouisVientiane

STL Lambert-St Louis - VTE Vientiane Wattay

STLVTE

Lambert-St Louis

Tue 11/10

4:05 pm-10:30 am

2 stops29h 25m

Vientiane Wattay

Wed 4/28

3:50 pm-3:09 pm

2 stops59h 19m

$3,847

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

See travel insights to Vientiane from

How to get the cheapest flight ticket from St. Louis to Vientiane

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 airline that flies from Lambert-St Louis to Vientiane Wattay?

China Southern is the most popular carrier operating from Lambert-St Louis to Vientiane Wattay

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

39h 15m

Direct flights

None
The fastest flight from St. Louis to Vientiane takes 39h 15m
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 39h 15m 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.

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.

An easier way to manage your Vientiane trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 9/5
Sat 9/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Laos