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Cheap flights from St. Louis to Brussels from $380

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 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.
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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.
Scandinavian Airlines Logo
1:30 pm - 11:00 pm
STL
-
BRU
26h 30m
2 stops
Scandinavian Airlines Logo
7:10 pm - 11:37 pm
BRU
-
STL
35h 27m
2 stops
$856Scandinavian Airlines
Sat, Sep 19 - Wed, Sep 23
Lufthansa Logo
1:18 pm - 1:10 pm
STL
-
BRU
16h 52m
2 stops
Lufthansa Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$869Lufthansa
Thu, Aug 20 - Wed, Dec 9
British Airways Logo
9:35 pm - 9:55 am
STL
-
BRU
29h 20m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$878British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
3:33 pm - 4:10 pm
STL
-
BRU
17h 37m
2 stops
British Airways Logo
11:50 am - 11:58 pm
BRU
-
STL
19h 08m
2 stops
$880British Airways
Thu, Aug 20 - Wed, Dec 9
British Airways Logo
9:35 pm - 3:05 pm
STL
-
BRU
10h 30m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$883British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 9:55 am
STL
-
BRU
29h 20m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$888British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
British Airways Logo
8:50 pm - 11:41 pm
BRU
-
STL
33h 51m
2 stops
$889British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$900British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$901British Airways
Wed, Sep 30 - Mon, Oct 5
Lufthansa Logo
11:37 am - 4:15 pm
STL
-
BRU
21h 38m
2 stops
Lufthansa Logo
8:30 am - 1:25 pm
BRU
-
STL
11h 55m
1 stop
$906Lufthansa
Tue, Apr 21 - Wed, Apr 29

Lufthansa flights from St. Louis to Brussels

Our best Lufthansa deals on St. Louis to Brussels flight tickets
Lufthansa
Aug 20
STL1:18 pmLambert-St Louis
16h 52m
2 stops
BRU1:10 pmBrussels Bruxelles-National
Dec 9
BRU7:00 amBrussels Bruxelles-National
13h 55m
1 stop
STL1:55 pmLambert-St Louis
$869
Lufthansa
Apr 21
STL11:37 amLambert-St Louis
21h 38m
2 stops
BRU4:15 pmBrussels Bruxelles-National
Apr 29
BRU8:30 amBrussels Bruxelles-National
11h 55m
1 stop
STL1:25 pmLambert-St Louis
$906
Lufthansa
Apr 21
STL11:37 amLambert-St Louis
21h 38m
2 stops
BRU4:15 pmBrussels Bruxelles-National
Apr 28
BRU7:00 amBrussels Bruxelles-National
21h 13m
2 stops
STL9:13 pmLambert-St Louis
$915

British Airways flights from St. Louis to Brussels

Our best British Airways deals on St. Louis to Brussels flight tickets
British Airways
Sep 30
STL9:35 pmLambert-St Louis
29h 20m
1 stop
BRU9:55 amBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
29h 40m
1 stop
STL7:30 pmLambert-St Louis
$878
British Airways
Aug 20
STL3:33 pmLambert-St Louis
17h 37m
2 stops
BRU4:10 pmBrussels Bruxelles-National
Dec 9
BRU11:50 amBrussels Bruxelles-National
19h 08m
2 stops
STL11:58 pmLambert-St Louis
$880
British Airways
Sep 30
STL9:35 pmLambert-St Louis
10h 30m
1 stop
BRU3:05 pmBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
29h 40m
1 stop
STL7:30 pmLambert-St Louis
$883

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 April 9, 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

Sat 9/19

1:30 pm-11:00 pm

2 stops26h 30m

Brussels Bruxelles-National

Wed 9/23

7:10 pm-11:37 pm

2 stops35h 27m

$856
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 8/20

1:18 pm-1:10 pm

2 stops16h 52m

Brussels Bruxelles-National

Wed 12/9

7:00 am-1:55 pm

1 stop13h 55m

$869

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-9:55 am

1 stop29h 20m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$878

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 8/20

3:33 pm-4:10 pm

2 stops17h 37m

Brussels Bruxelles-National

Wed 12/9

11:50 am-11:58 pm

2 stops19h 08m

$880

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-3:05 pm

1 stop10h 30m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$883

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-9:55 am

1 stop29h 20m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$888

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-11:41 pm

2 stops33h 51m

$889

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$900

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$901

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 4/21

11:37 am-4:15 pm

2 stops21h 38m

Brussels Bruxelles-National

Wed 4/29

8:30 am-1:25 pm

1 stop11h 55m

$906

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 January is also very affordable. Most momondo users find prices during this month for around $657.

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

12h 00m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 12h 00m
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 12h 00m.

  • 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
7,900 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,555 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