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Cheap flights from St. Louis to Brussels from $307

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 5/6. 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

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Find the cheapest flights from St. Louis to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
10:00 am - 7:10 am
STL
-
BRU
14h 10m
2 stops
Air Canada Logo
9:55 am - 9:13 pm
BRU
-
STL
18h 18m
2 stops
$748Air Canada
Wed, Apr 22 - Wed, Apr 29
Multiple Airlines Logo
10:00 am - 7:50 am
STL
-
BRU
14h 50m
2 stops
Multiple Airlines Logo
12:00 pm - 7:22 pm
BRU
-
STL
14h 22m
1 stop
$754Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
Scandinavian Airlines Logo
11:42 am - 9:40 am
STL
-
BRU
38h 58m
2 stops
Scandinavian Airlines Logo
10:20 am - 11:59 pm
BRU
-
STL
20h 39m
2 stops
$756Scandinavian Airlines
Sun, May 3 - Tue, May 12
Lufthansa Logo
11:37 am - 7:45 am
STL
-
BRU
13h 08m
1 stop
Lufthansa Logo
10:15 am - 9:13 pm
BRU
-
STL
17h 58m
1 stop
$767Lufthansa
Wed, Apr 22 - Wed, Apr 29
KLM Logo
6:50 pm - 7:40 am
STL
-
BRU
29h 50m
1 stop
KLM Logo
9:45 am - 11:59 pm
BRU
-
STL
21h 14m
1 stop
$769KLM
Sun, May 3 - Tue, May 12
Air Canada Logo
1:00 pm - 8:55 am
STL
-
BRU
36h 55m
2 stops
Air Canada Logo
9:55 am - 8:25 pm
BRU
-
STL
17h 30m
1 stop
$774Air Canada
Sun, May 3 - Tue, May 12
Multiple Airlines Logo
7:05 am - 6:20 pm
STL
-
BRU
28h 15m
2 stops
Multiple Airlines Logo
11:20 am - 10:19 pm
BRU
-
STL
17h 59m
2 stops
$791Multiple Airlines
Sun, May 3 - Tue, May 12
Multiple Airlines Logo
4:05 pm - 7:10 am
STL
-
BRU
32h 05m
2 stops
Multiple Airlines Logo
9:20 pm - 3:25 pm
BRU
-
STL
25h 05m
2 stops
$801Multiple Airlines
Mon, Apr 6 - Mon, Apr 13
Lufthansa Logo
7:09 pm - 4:15 pm
STL
-
BRU
14h 06m
2 stops
Lufthansa Logo
7:00 am - 1:25 pm
BRU
-
STL
13h 25m
1 stop
$811Lufthansa
Fri, May 8 - Fri, May 15
United Airlines Logo
8:15 pm - 9:00 am
STL
-
BRU
29h 45m
1 stop
United Airlines Logo
9:30 am - 3:25 pm
BRU
-
STL
36h 55m
2 stops
$813United Airlines
Mon, Apr 6 - Mon, Apr 13

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
Apr 22
STL10:00 amLambert-St Louis
14h 10m
2 stops
BRU7:10 amBrussels Bruxelles-National
Apr 29
BRU9:55 amBrussels Bruxelles-National
18h 18m
2 stops
STL9:13 pmLambert-St Louis
$748
Air Canada
May 3
STL1:00 pmLambert-St Louis
36h 55m
2 stops
BRU8:55 amBrussels Bruxelles-National
May 12
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$774
Air Canada
Apr 24
STL6:30 amLambert-St Louis
17h 40m
2 stops
BRU7:10 amBrussels Bruxelles-National
May 1
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$843

Lufthansa flights from St. Louis to Brussels

Our best Lufthansa deals on St. Louis to Brussels flight tickets
Lufthansa
Apr 22
STL11:37 amLambert-St Louis
13h 08m
1 stop
BRU7:45 amBrussels Bruxelles-National
Apr 29
BRU10:15 amBrussels Bruxelles-National
17h 58m
1 stop
STL9:13 pmLambert-St Louis
$767
Lufthansa
May 8
STL7:09 pmLambert-St Louis
14h 06m
2 stops
BRU4:15 pmBrussels Bruxelles-National
May 15
BRU7:00 amBrussels Bruxelles-National
13h 25m
1 stop
STL1:25 pmLambert-St Louis
$811
Lufthansa
May 8
STL7:09 pmLambert-St Louis
14h 06m
2 stops
BRU4:15 pmBrussels Bruxelles-National
May 15
BRU7:00 amBrussels Bruxelles-National
16h 39m
2 stops
STL4:39 pmLambert-St Louis
$821

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 March 12, 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

Wed 4/22

10:00 am-7:10 am

2 stops14h 10m

Brussels Bruxelles-National

Wed 4/29

9:55 am-9:13 pm

2 stops18h 18m

$748

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/22

10:00 am-7:50 am

2 stops14h 50m

Brussels Bruxelles-National

Wed 4/29

12:00 pm-7:22 pm

1 stop14h 22m

$754

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 5/3

11:42 am-9:40 am

2 stops38h 58m

Brussels Bruxelles-National

Tue 5/12

10:20 am-11:59 pm

2 stops20h 39m

$756

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/22

11:37 am-7:45 am

1 stop13h 08m

Brussels Bruxelles-National

Wed 4/29

10:15 am-9:13 pm

1 stop17h 58m

$767

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 5/3

6:50 pm-7:40 am

1 stop29h 50m

Brussels Bruxelles-National

Tue 5/12

9:45 am-11:59 pm

1 stop21h 14m

$769

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 5/3

1:00 pm-8:55 am

2 stops36h 55m

Brussels Bruxelles-National

Tue 5/12

9:55 am-8:25 pm

1 stop17h 30m

$774

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 5/3

7:05 am-6:20 pm

2 stops28h 15m

Brussels Bruxelles-National

Tue 5/12

11:20 am-10:19 pm

2 stops17h 59m

$791

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 4/6

4:05 pm-7:10 am

2 stops32h 05m

Brussels Bruxelles-National

Mon 4/13

9:20 pm-3:25 pm

2 stops25h 05m

$801
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 5/8

7:09 pm-4:15 pm

2 stops14h 06m

Brussels Bruxelles-National

Fri 5/15

7:00 am-1:25 pm

1 stop13h 25m

$811

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 4/6

8:15 pm-9:00 am

1 stop29h 45m

Brussels Bruxelles-National

Mon 4/13

9:30 am-3:25 pm

2 stops36h 55m

$813

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, February 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 $494. If you are unable to visit Brussels during the month of February, then departing from St. Louis during the month April is also very affordable. Most momondo users find prices during this month for around $510.

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

14h 10m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 14h 10m
There are no direct flights from St. Louis to Brussels. There are no popular flight routes from St. Louis to Brussels.
Search flight deals

  • 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 14h 10m.

  • 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
7,844 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,418 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