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Cheap flights from St. Louis to Brussels from $459

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 8/3. 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.
Air Canada Logo
4:05 pm - 8:55 am
STL
-
BRU
33h 50m
2 stops
Air Canada Logo
10:00 am - 12:06 pm
BRU
-
STL
33h 06m
2 stops
$729Air Canada
Mon, Nov 9 - Wed, Nov 25
Multiple Airlines Logo
4:56 pm - 8:05 am
STL
-
BRU
32h 09m
1 stop
Multiple Airlines Logo
10:00 am - 3:26 pm
BRU
-
STL
36h 26m
2 stops
$738Multiple Airlines
Mon, Nov 9 - Wed, Nov 25
United Airlines Logo
3:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
8:25 am - 1:45 pm
BRU
-
STL
12h 20m
1 stop
$742United Airlines
Mon, Nov 9 - Wed, Nov 25
United Airlines Logo
1:08 pm - 8:55 am
STL
-
BRU
12h 47m
1 stop
United Airlines Logo
8:25 am - 1:45 pm
BRU
-
STL
12h 20m
1 stop
$746United Airlines
Mon, Nov 9 - Wed, Nov 25
United Airlines Logo
1:08 pm - 1:15 pm
STL
-
BRU
17h 07m
2 stops
United Airlines Logo
10:10 am - 3:41 pm
BRU
-
STL
12h 31m
1 stop
$799United Airlines
Sun, Dec 6 - Tue, Dec 29
United Airlines Logo
3:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
11:15 am - 9:13 pm
BRU
-
STL
16h 58m
2 stops
$803United Airlines
Sun, Dec 6 - Tue, Dec 29
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Multiple Airlines Logo
9:55 am - 6:42 pm
BRU
-
STL
15h 47m
2 stops
$816Multiple Airlines
Sun, Aug 16 - Tue, Aug 25
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Multiple Airlines Logo
9:30 am - 6:42 pm
BRU
-
STL
16h 12m
1 stop
$831Multiple Airlines
Sun, Aug 16 - Tue, Aug 25
Air Canada Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Air Canada Logo
9:30 am - 12:02 pm
BRU
-
STL
33h 32m
2 stops
$838Air Canada
Sun, Aug 16 - Tue, Aug 25
Air Canada Logo
8:00 am - 7:10 am
STL
-
BRU
16h 10m
2 stops
Air Canada Logo
9:30 am - 3:38 pm
BRU
-
STL
37h 08m
2 stops
$843Air Canada
Sun, Aug 16 - Tue, Aug 25

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Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
Nov 9
STL4:05 pmLambert-St Louis
33h 50m
2 stops
BRU8:55 amBrussels Bruxelles-National
Nov 25
BRU10:00 amBrussels Bruxelles-National
33h 06m
2 stops
STL12:06 pmLambert-St Louis
$729
Air Canada
Aug 16
STL12:10 pmLambert-St Louis
12h 00m
1 stop
BRU7:10 amBrussels Bruxelles-National
Aug 25
BRU9:30 amBrussels Bruxelles-National
33h 32m
2 stops
STL12:02 pmLambert-St Louis
$838
Air Canada
Aug 16
STL8:00 amLambert-St Louis
16h 10m
2 stops
BRU7:10 amBrussels Bruxelles-National
Aug 25
BRU9:30 amBrussels Bruxelles-National
37h 08m
2 stops
STL3:38 pmLambert-St Louis
$843

United Airlines flights from St. Louis to Brussels

Our best United Airlines deals on St. Louis to Brussels flight tickets
United Airlines
Nov 9
STL3:15 pmLambert-St Louis
15h 00m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 25
BRU8:25 amBrussels Bruxelles-National
12h 20m
1 stop
STL1:45 pmLambert-St Louis
$742
United Airlines
Dec 6
STL1:08 pmLambert-St Louis
17h 07m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Dec 29
BRU10:10 amBrussels Bruxelles-National
12h 31m
1 stop
STL3:41 pmLambert-St Louis
$799
United Airlines
Dec 6
STL3:15 pmLambert-St Louis
15h 00m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Dec 29
BRU11:15 amBrussels Bruxelles-National
16h 58m
2 stops
STL9:13 pmLambert-St Louis
$803

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 July 1, 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 11/9

4:05 pm-8:55 am

2 stops33h 50m

Brussels Bruxelles-National

Wed 11/25

10:00 am-12:06 pm

2 stops33h 06m

$729

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/9

4:56 pm-8:05 am

1 stop32h 09m

Brussels Bruxelles-National

Wed 11/25

10:00 am-3:26 pm

2 stops36h 26m

$738

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/9

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Wed 11/25

8:25 am-1:45 pm

1 stop12h 20m

$742
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/9

1:08 pm-8:55 am

1 stop12h 47m

Brussels Bruxelles-National

Wed 11/25

8:25 am-1:45 pm

1 stop12h 20m

$746

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 12/6

1:08 pm-1:15 pm

2 stops17h 07m

Brussels Bruxelles-National

Tue 12/29

10:10 am-3:41 pm

1 stop12h 31m

$799

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 12/6

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Tue 12/29

11:15 am-9:13 pm

2 stops16h 58m

$803

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/16

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 8/25

9:55 am-6:42 pm

2 stops15h 47m

$816

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/16

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 8/25

9:30 am-6:42 pm

1 stop16h 12m

$831

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/16

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 8/25

9:30 am-12:02 pm

2 stops33h 32m

$838

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/16

8:00 am-7:10 am

2 stops16h 10m

Brussels Bruxelles-National

Tue 8/25

9:30 am-3:38 pm

2 stops37h 08m

$843

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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

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.
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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
8,109 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,909 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