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Cheap flights from St. Louis to Brussels from $318

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 8/8. 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
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
Multiple Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Multiple Airlines Logo
7:30 pm - 1:25 pm
BRU
-
STL
24h 55m
1 stop
$868Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Multiple Airlines Logo
2:25 pm - 1:25 pm
BRU
-
STL
30h 00m
1 stop
$872Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Multiple Airlines Logo
3:40 pm - 9:09 pm
BRU
-
STL
36h 29m
2 stops
$873Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
11:01 am - 6:20 pm
STL
-
BRU
24h 19m
2 stops
Multiple Airlines Logo
7:05 pm - 9:59 pm
BRU
-
STL
33h 54m
2 stops
$883Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Air Canada Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Air Canada Logo
9:10 am - 12:13 pm
BRU
-
STL
34h 03m
2 stops
$890Air Canada
Wed, Sep 23 - Tue, Sep 29
Multiple Airlines Logo
2:40 pm - 1:15 pm
STL
-
BRU
15h 35m
2 stops
Multiple Airlines Logo
9:55 am - 8:20 pm
BRU
-
STL
17h 25m
1 stop
$893Multiple Airlines
Wed, Sep 23 - Tue, Sep 29
United Airlines Logo
8:50 am - 9:00 am
STL
-
BRU
17h 10m
1 stop
United Airlines Logo
9:55 am - 12:02 pm
BRU
-
STL
33h 07m
2 stops
$894United Airlines
Thu, Aug 20 - Thu, Aug 27

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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
Sep 23
STL12:10 pmLambert-St Louis
18h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Sep 29
BRU9:10 amBrussels Bruxelles-National
34h 03m
2 stops
STL12:13 pmLambert-St Louis
$890
Air Canada
Aug 24
STL12:10 pmLambert-St Louis
24h 50m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Sep 5
BRU9:30 amBrussels Bruxelles-National
33h 32m
2 stops
STL12:02 pmLambert-St Louis
$895

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
Nov 9
STL1:08 pmLambert-St Louis
12h 47m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 25
BRU8:25 amBrussels Bruxelles-National
12h 20m
1 stop
STL1:45 pmLambert-St Louis
$746
United Airlines
Aug 20
STL8:50 amLambert-St Louis
17h 10m
1 stop
BRU9:00 amBrussels Bruxelles-National
Aug 27
BRU9:55 amBrussels Bruxelles-National
33h 07m
2 stops
STL12:02 pmLambert-St Louis
$894

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 7, 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

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

Wed 9/30

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Mon 10/5

7:30 pm-1:25 pm

1 stop24h 55m

$868

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Mon 10/5

2:25 pm-1:25 pm

1 stop30h 00m

$872

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Mon 10/5

3:40 pm-9:09 pm

2 stops36h 29m

$873

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-9:59 pm

2 stops33h 54m

$883

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/23

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Tue 9/29

9:10 am-12:13 pm

2 stops34h 03m

$890

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/23

2:40 pm-1:15 pm

2 stops15h 35m

Brussels Bruxelles-National

Tue 9/29

9:55 am-8:20 pm

1 stop17h 25m

$893

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 8/20

8:50 am-9:00 am

1 stop17h 10m

Brussels Bruxelles-National

Thu 8/27

9:55 am-12:02 pm

2 stops33h 07m

$894

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

15h 00m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 15h 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 15h 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
8,116 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,940 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