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Cheap flights from St. Louis to Belgium from $312

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 Belgium departing on 10/13. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Belgium

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m
2 stops
Multiple Airlines Logo
8:10 pm - 3:26 pm
BRU
-
STL
50h 16m
2 stops
$759Multiple Airlines
Mon, Nov 30 - Mon, Dec 14
United Airlines Logo
4:05 pm - 8:55 am
STL
-
BRU
33h 50m
2 stops
United Airlines Logo
4:55 pm - 6:38 pm
BRU
-
STL
32h 43m
2 stops
$773United Airlines
Sun, Nov 29 - Wed, Dec 2
United Airlines Logo
7:33 am - 8:55 am
STL
-
BRU
18h 22m
1 stop
United Airlines Logo
4:55 pm - 6:38 pm
BRU
-
STL
32h 43m
2 stops
$774United Airlines
Sun, Nov 29 - Wed, Dec 2
United Airlines Logo
3:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
10:10 am - 4:56 pm
BRU
-
STL
13h 46m
1 stop
$798United Airlines
Mon, Nov 30 - Mon, Dec 14
United Airlines Logo
11:25 am - 8:55 am
STL
-
BRU
14h 30m
1 stop
United Airlines Logo
10:10 am - 7:29 pm
BRU
-
STL
16h 19m
1 stop
$802United Airlines
Mon, Nov 30 - Mon, Dec 14
United Airlines Logo
11:25 am - 8:55 am
STL
-
BRU
14h 30m
1 stop
United Airlines Logo
8:25 am - 1:45 pm
BRU
-
STL
12h 20m
1 stop
$805United Airlines
Sun, Nov 29 - Wed, Dec 2
United Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m
2 stops
United Airlines Logo
10:00 am - 9:13 pm
BRU
-
STL
18h 13m
2 stops
$811United Airlines
Sun, Nov 29 - Wed, Dec 2
Multiple Airlines Logo
11:01 am - 6:20 pm
STL
-
BRU
24h 19m
2 stops
Multiple Airlines Logo
7:05 pm - 9:59 pm
BRU
-
STL
33h 54m
2 stops
$831Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
United Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
United Airlines Logo
9:30 am - 11:17 am
BRU
-
STL
32h 47m
2 stops
$843United Airlines
Tue, Aug 25 - Wed, Sep 2
Multiple Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Multiple Airlines Logo
7:30 pm - 1:25 pm
BRU
-
STL
24h 55m
1 stop
$854Multiple Airlines
Wed, Sep 30 - Mon, Oct 5

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United Airlines flights from St. Louis to Belgium

Our best United Airlines deals on St. Louis to Belgium flight tickets
United Airlines
Nov 29
STL4:05 pmLambert-St Louis
33h 50m
2 stops
BRU8:55 amBrussels Bruxelles-National
Dec 2
BRU4:55 pmBrussels Bruxelles-National
32h 43m
2 stops
STL6:38 pmLambert-St Louis
$773
United Airlines
Nov 29
STL7:33 amLambert-St Louis
18h 22m
1 stop
BRU8:55 amBrussels Bruxelles-National
Dec 2
BRU4:55 pmBrussels Bruxelles-National
32h 43m
2 stops
STL6:38 pmLambert-St Louis
$774
United Airlines
Nov 30
STL3:15 pmLambert-St Louis
15h 00m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Dec 14
BRU10:10 amBrussels Bruxelles-National
13h 46m
1 stop
STL4:56 pmLambert-St Louis
$798

British Airways flights from St. Louis to Belgium

Our best British Airways deals on St. Louis to Belgium flight tickets
British Airways
Oct 26
STL5:27 pmLambert-St Louis
14h 28m
2 stops
BRU1:55 pmBrussels Bruxelles-National
Nov 10
BRU12:00 pmBrussels Bruxelles-National
16h 57m
2 stops
STL9:57 pmLambert-St Louis
$1,530
British Airways
Jul 27
STL7:07 amLambert-St Louis
19h 58m
2 stops
BRU10:05 amBrussels Bruxelles-National
Jul 29
BRU9:15 pmBrussels Bruxelles-National
34h 01m
2 stops
STL12:16 amLambert-St Louis
$2,527

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Belgium 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 July 26, 2026.
Use the filters below to find and compare flights from St. Louis to Belgium that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/30

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Mon 12/14

8:10 pm-3:26 pm

2 stops50h 16m

$759

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 11/29

4:05 pm-8:55 am

2 stops33h 50m

Brussels Bruxelles-National

Wed 12/2

4:55 pm-6:38 pm

2 stops32h 43m

$773

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 11/29

7:33 am-8:55 am

1 stop18h 22m

Brussels Bruxelles-National

Wed 12/2

4:55 pm-6:38 pm

2 stops32h 43m

$774

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/30

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Mon 12/14

10:10 am-4:56 pm

1 stop13h 46m

$798

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/30

11:25 am-8:55 am

1 stop14h 30m

Brussels Bruxelles-National

Mon 12/14

10:10 am-7:29 pm

1 stop16h 19m

$802
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 11/29

11:25 am-8:55 am

1 stop14h 30m

Brussels Bruxelles-National

Wed 12/2

8:25 am-1:45 pm

1 stop12h 20m

$805

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 11/29

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 12/2

10:00 am-9:13 pm

2 stops18h 13m

$811

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

11:01 am-6:20 pm

2 stops24h 19m

Brussels Bruxelles-National

Mon 10/5

7:05 pm-9:59 pm

2 stops33h 54m

$831

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 8/25

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Wed 9/2

9:30 am-11:17 am

2 stops32h 47m

$843

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Mon 10/5

7:30 pm-1:25 pm

1 stop24h 55m

$854

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belgium from

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

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 month to fly to Belgium?

In general, February is the cheapest month to fly from St. Louis to Belgium. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $494. If you are unable to visit Belgium during the month of February, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $657.

Can stopping save me money on St. Louis to Belgium flights?

You could potentially save up to 76% on your flight if you consider stops on a St. Louis to Belgium flight.

Cheap St. Louis to Belgium flight deals and tips

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

Fastest flight time

12h 00m

Direct flights

None
The fastest flight from St. Louis to Belgium takes 12h 00m
There are no direct flights from St. Louis to Belgium. There are no popular flight routes from St. Louis to Belgium.
Search flight deals

Frequently asked questions about flying from St. Louis to Belgium

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

    Prices for flights from Lambert-St Louis Airport to Belgium are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Belgium?

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

    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 Belgium.

  • What documentation or ID do you need to fly to Belgium?

    The travel and health documents required for your trip to Belgium can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belgium. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from St. Louis to Belgium

Compare and see reviews for airlines that fly from St. Louis to Belgium with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $441Free CancellationRating
6.8
8,157 reviews
Search Lufthansa flights
United AirlinesPriceFrom $507Free CancellationRating
7.4
10,041 reviews
Search United Airlines flights

Why use momondo?

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

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

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

Flights from St. Louis to Belgium with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential St. Louis to Belgium flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of St. Louis to Belgium flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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