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Cheap flights from St. Louis to Belgium from $390

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 9/20. 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.
Air Canada Logo
12:10 pm - 8:55 am
STL
-
BRU
37h 45m
2 stops
Air Canada Logo
10:00 am - 2:18 pm
BRU
-
STL
35h 18m
2 stops
$810Air Canada
Mon, Oct 12 - Wed, Nov 11
Air Canada Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Air Canada Logo
10:00 am - 2:18 pm
BRU
-
STL
35h 18m
2 stops
$813Air Canada
Mon, Oct 12 - Wed, Nov 11
Scandinavian Airlines Logo
3:39 pm - 7:50 pm
STL
-
BRU
21h 11m
2 stops
Scandinavian Airlines Logo
8:30 pm - 8:38 pm
BRU
-
STL
31h 08m
2 stops
$819Scandinavian Airlines
Mon, Aug 24 - Sat, Sep 5
United Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
United Airlines Logo
8:25 am - 1:45 pm
BRU
-
STL
12h 20m
1 stop
$830United Airlines
Mon, Oct 12 - Wed, Nov 11
Multiple Airlines Logo
9:20 am - 7:50 am
STL
-
BRU
15h 30m
2 stops
Multiple Airlines Logo
6:20 am - 3:46 pm
BRU
-
STL
16h 26m
2 stops
$865Multiple Airlines
Mon, Jul 27 - Tue, Aug 4
Multiple Airlines Logo
12:46 pm - 3:05 pm
STL
-
BRU
19h 19m
2 stops
Multiple Airlines Logo
7:05 pm - 11:41 pm
BRU
-
STL
35h 36m
2 stops
$871Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
3:22 pm - 9:00 am
STL
-
BRU
10h 38m
1 stop
Multiple Airlines Logo
9:55 am - 6:42 pm
BRU
-
STL
15h 47m
2 stops
$872Multiple Airlines
Mon, Jul 27 - Tue, Aug 4
United Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
United Airlines Logo
9:10 am - 6:41 pm
BRU
-
STL
16h 31m
1 stop
$879United Airlines
Sun, Sep 20 - Fri, Oct 2
Air Canada Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Air Canada Logo
9:10 am - 6:41 pm
BRU
-
STL
16h 31m
1 stop
$882Air Canada
Sun, Sep 20 - Fri, Oct 2
Multiple Airlines Logo
11:01 am - 6:20 pm
STL
-
BRU
24h 19m
2 stops
Multiple Airlines Logo
7:05 pm - 10:00 pm
BRU
-
STL
33h 55m
2 stops
$883Multiple Airlines
Wed, Sep 30 - Mon, Oct 5

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Iberia flights from St. Louis to Belgium

Our best Iberia deals on St. Louis to Belgium flight tickets
Iberia
Oct 1
STL11:01 amLambert-St Louis
28h 29m
2 stops
BRU10:30 pmBrussels Bruxelles-National
Oct 7
BRU12:05 pmBrussels Bruxelles-National
18h 36m
2 stops
STL11:41 pmLambert-St Louis
$938
Iberia
Jun 22
STL1:42 pmLambert-St Louis
25h 48m
2 stops
BRU10:30 pmBrussels Bruxelles-National
Jul 8
BRU12:05 pmBrussels Bruxelles-National
43h 11m
2 stops
STL12:16 amLambert-St Louis
$1,591
Iberia
Jun 23
STL5:03 pmLambert-St Louis
42h 57m
2 stops
BRU7:00 pmBrussels Bruxelles-National
Jul 8
BRU12:05 pmBrussels Bruxelles-National
43h 11m
2 stops
STL12:16 amLambert-St Louis
$1,597

United Airlines flights from St. Louis to Belgium

Our best United Airlines deals on St. Louis to Belgium flight tickets
United Airlines
Oct 12
STL12:10 pmLambert-St Louis
12h 00m
1 stop
BRU7:10 amBrussels Bruxelles-National
Nov 11
BRU8:25 amBrussels Bruxelles-National
12h 20m
1 stop
STL1:45 pmLambert-St Louis
$830
United Airlines
Sep 20
STL12:10 pmLambert-St Louis
18h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Oct 2
BRU9:10 amBrussels Bruxelles-National
16h 31m
1 stop
STL6:41 pmLambert-St Louis
$879
United Airlines
Aug 24
STL8:50 amLambert-St Louis
17h 10m
1 stop
BRU9:00 amBrussels Bruxelles-National
Sep 5
BRU9:30 amBrussels Bruxelles-National
31h 42m
2 stops
STL10:12 amLambert-St Louis
$900

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 June 11, 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 10/12

12:10 pm-8:55 am

2 stops37h 45m

Brussels Bruxelles-National

Wed 11/11

10:00 am-2:18 pm

2 stops35h 18m

$810

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 10/12

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Wed 11/11

10:00 am-2:18 pm

2 stops35h 18m

$813

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 8/24

3:39 pm-7:50 pm

2 stops21h 11m

Brussels Bruxelles-National

Sat 9/5

8:30 pm-8:38 pm

2 stops31h 08m

$819
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 10/12

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Wed 11/11

8:25 am-1:45 pm

1 stop12h 20m

$830

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 7/27

9:20 am-7:50 am

2 stops15h 30m

Brussels Bruxelles-National

Tue 8/4

6:20 am-3:46 pm

2 stops16h 26m

$865

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

12:46 pm-3:05 pm

2 stops19h 19m

Brussels Bruxelles-National

Mon 10/5

7:05 pm-11:41 pm

2 stops35h 36m

$871

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 7/27

3:22 pm-9:00 am

1 stop10h 38m

Brussels Bruxelles-National

Tue 8/4

9:55 am-6:42 pm

2 stops15h 47m

$872

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 9/20

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Fri 10/2

9:10 am-6:41 pm

1 stop16h 31m

$879

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 9/20

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Fri 10/2

9:10 am-6:41 pm

1 stop16h 31m

$882

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-10:00 pm

2 stops33h 55m

$883

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, April 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 $414. If you are unable to visit Belgium during the month of April, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $441.

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

You could potentially save up to 16% 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

11h 05m

Direct flights

None
The fastest flight from St. Louis to Belgium takes 11h 05m
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
8,052 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,805 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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