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Cheap flights from St. Louis to Brussels from $416

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 Brussels departing on 10/3. 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 Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
11:25 am - 1:15 pm
STL
-
BRU
18h 50m
2 stops
United Airlines Logo
10:10 am - 4:56 pm
BRU
-
STL
13h 46m
1 stop
$746United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
8:33 am - 1:15 pm
STL
-
BRU
21h 42m
2 stops
United Airlines Logo
10:10 am - 3:41 pm
BRU
-
STL
12h 31m
1 stop
$747United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
2:00 pm - 8:05 am
STL
-
BRU
11h 05m
1 stop
United Airlines Logo
10:10 am - 6:06 pm
BRU
-
STL
14h 56m
1 stop
$750United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
3:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
11:15 am - 7:29 pm
BRU
-
STL
15h 14m
2 stops
$751United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
United Airlines Logo
10:10 am - 9:09 pm
BRU
-
STL
17h 59m
1 stop
$816United Airlines
Tue, Oct 13 - Tue, Nov 10
Air Canada Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Air Canada Logo
10:00 am - 3:30 pm
BRU
-
STL
36h 30m
2 stops
$817Air Canada
Tue, Oct 13 - Tue, Nov 10
United Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
United Airlines Logo
11:15 am - 7:40 pm
BRU
-
STL
15h 25m
1 stop
$819United Airlines
Tue, Oct 13 - Tue, Nov 10
Air Canada Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Air Canada Logo
9:30 am - 2:57 pm
BRU
-
STL
36h 27m
2 stops
$835Air Canada
Mon, Jul 27 - Fri, Aug 21
Air Canada Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Air Canada Logo
9:30 am - 2:57 pm
BRU
-
STL
36h 27m
2 stops
$839Air Canada
Mon, Jul 27 - Fri, Aug 21
Multiple Airlines Logo
8:55 am - 3:20 pm
STL
-
CRL
23h 25m
2 stops
Multiple Airlines Logo
6:25 pm - 1:25 pm
CRL
-
STL
26h 00m
2 stops
$1,388Multiple Airlines
Sat, Oct 10 - Sun, Oct 18

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Lufthansa flights from St. Louis to Brussels

Our best Lufthansa deals on St. Louis to Brussels flight tickets
Lufthansa
Sep 30
STL3:30 pmLambert-St Louis
13h 20m
1 stop
BRU11:50 amBrussels Bruxelles-National
Oct 5
BRU6:20 amBrussels Bruxelles-National
14h 05m
1 stop
STL1:25 pmLambert-St Louis
$907
Lufthansa
Jul 6
STL1:13 pmLambert-St Louis
17h 27m
2 stops
BRU1:40 pmBrussels Bruxelles-National
Jul 21
BRU6:20 amBrussels Bruxelles-National
14h 05m
1 stop
STL1:25 pmLambert-St Louis
$1,173
Lufthansa
Jul 6
STL1:13 pmLambert-St Louis
17h 27m
2 stops
BRU1:40 pmBrussels Bruxelles-National
Jul 21
BRU6:20 amBrussels Bruxelles-National
14h 05m
1 stop
STL1:25 pmLambert-St Louis
$1,174

United Airlines flights from St. Louis to Brussels

Our best United Airlines deals on St. Louis to Brussels flight tickets
United Airlines
Nov 16
STL11:25 amLambert-St Louis
18h 50m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 19
BRU10:10 amBrussels Bruxelles-National
13h 46m
1 stop
STL4:56 pmLambert-St Louis
$746
United Airlines
Nov 16
STL8:33 amLambert-St Louis
21h 42m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 19
BRU10:10 amBrussels Bruxelles-National
12h 31m
1 stop
STL3:41 pmLambert-St Louis
$747
United Airlines
Nov 16
STL2:00 pmLambert-St Louis
11h 05m
1 stop
BRU8:05 amBrussels Bruxelles-National
Nov 19
BRU10:10 amBrussels Bruxelles-National
14h 56m
1 stop
STL6:06 pmLambert-St Louis
$750

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Brussels 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 22, 2026.
Use the filters below to find and compare flights from St. Louis to Brussels 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 11/16

11:25 am-1:15 pm

2 stops18h 50m

Brussels Bruxelles-National

Thu 11/19

10:10 am-4:56 pm

1 stop13h 46m

$746

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

8:33 am-1:15 pm

2 stops21h 42m

Brussels Bruxelles-National

Thu 11/19

10:10 am-3:41 pm

1 stop12h 31m

$747
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

2:00 pm-8:05 am

1 stop11h 05m

Brussels Bruxelles-National

Thu 11/19

10:10 am-6:06 pm

1 stop14h 56m

$750

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Thu 11/19

11:15 am-7:29 pm

2 stops15h 14m

$751

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/13

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Tue 11/10

10:10 am-9:09 pm

1 stop17h 59m

$816

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/13

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Tue 11/10

10:00 am-3:30 pm

2 stops36h 30m

$817

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/13

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 11/10

11:15 am-7:40 pm

1 stop15h 25m

$819

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 7/27

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Fri 8/21

9:30 am-2:57 pm

2 stops36h 27m

$835

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 7/27

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Fri 8/21

9:30 am-2:57 pm

2 stops36h 27m

$839

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Sat 10/10

8:55 am-3:20 pm

2 stops23h 25m

Charleroi Brussels

Sun 10/18

6:25 pm-1:25 pm

2 stops26h 00m

$1,388

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 Brussels from

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

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 typical price of a round-trip flight between St. Louis and Brussels?

What is the cheapest month to fly to Brussels?

In general, April is the cheapest month to fly from St. Louis to Brussels. 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 Brussels 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.

Cheap St. Louis to Brussels flight deals and tips

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

Fastest flight time

10h 49m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 10h 49m
There are no direct flights from St. Louis to Brussels. There are no popular flight routes from St. Louis to Brussels.
Search flight deals

Frequently asked questions about flying from St. Louis to Brussels

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

    There are 4389.6 mi between Lambert-St Louis and Brussels. By plane, this route typically takes 10h 49m.

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

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

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

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

    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 Brussels.

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

    The travel and health documents required for your trip to Brussels 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 Brussels. 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 Brussels

Compare and see reviews for airlines that fly from St. Louis to Brussels with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $441Free CancellationRating
6.8
8,086 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,874 reviews
Search United Airlines flights

Why use momondo?

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

Finding the right flight to Brussels from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Brussels quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Brussels from St. Louis with this policy.

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

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 Brussels.

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

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

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Find better results for your trip to Belgium

Fly into one of these airports located in Brussels

Airports listed have a maximum distance of 27.4 mi from Brussels
Brussels Bruxelles-National Airport
Charleroi Brussels Airport