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Cheap flights from St. Louis to Brussels from $390

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
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 - 2:35 pm
STL
-
BRU
18h 05m
2 stops
Scandinavian Airlines Logo
10:20 am - 11:37 pm
BRU
-
STL
20h 17m
2 stops
$788Scandinavian Airlines
Mon, Aug 31 - Thu, Sep 10
British Airways Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$873British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
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
9:35 pm - 3:05 pm
STL
-
BRU
10h 30m
1 stop
British Airways Logo
8:50 pm - 11:25 pm
BRU
-
STL
33h 35m
2 stops
$886British Airways
Wed, Sep 30 - Mon, Oct 5
United Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
United Airlines Logo
9:25 am - 11:06 am
BRU
-
STL
32h 41m
2 stops
$896United Airlines
Mon, Aug 31 - Thu, Sep 10
Multiple Airlines Logo
3:30 pm - 12:45 pm
STL
-
BRU
14h 15m
1 stop
Multiple Airlines Logo
9:25 am - 6:41 pm
BRU
-
STL
16h 16m
1 stop
$904Multiple Airlines
Mon, Aug 31 - Thu, Sep 10
British Airways Logo
6:06 am - 3:05 pm
STL
-
BRU
25h 59m
2 stops
British Airways Logo
8:50 pm - 8:08 pm
BRU
-
STL
30h 18m
2 stops
$907British Airways
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
7:44 am - 10:35 pm
STL
-
BRU
31h 51m
2 stops
Multiple Airlines Logo
7:05 pm - 7:46 pm
BRU
-
STL
31h 41m
2 stops
$921Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
American Airlines Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
American Airlines Logo
10:50 am - 11:25 pm
BRU
-
STL
19h 35m
2 stops
$928American Airlines
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
British Airways Logo
8:50 pm - 11:25 pm
BRU
-
STL
33h 35m
2 stops
$931British Airways
Wed, Sep 30 - Mon, Oct 5

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
May 4
STL1:05 pmLambert-St Louis
11h 05m
1 stop
BRU7:10 amBrussels Bruxelles-National
May 12
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$920
Air Canada
May 4
STL2:15 pmLambert-St Louis
22h 45m
2 stops
BRU8:00 pmBrussels Bruxelles-National
May 12
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$925
Air Canada
May 4
STL2:15 pmLambert-St Louis
15h 30m
2 stops
BRU12:45 pmBrussels Bruxelles-National
May 12
BRU9:55 amBrussels Bruxelles-National
18h 18m
2 stops
STL9:13 pmLambert-St Louis
$951

Scandinavian Airlines flights from St. Louis to Brussels

Our best Scandinavian Airlines deals on St. Louis to Brussels flight tickets
Scandinavian Airlines
Aug 31
STL1:30 pmLambert-St Louis
18h 05m
2 stops
BRU2:35 pmBrussels Bruxelles-National
Sep 10
BRU10:20 amBrussels Bruxelles-National
20h 17m
2 stops
STL11:37 pmLambert-St Louis
$788
Scandinavian Airlines
Aug 16
STL1:30 pmLambert-St Louis
23h 20m
2 stops
BRU7:50 pmBrussels Bruxelles-National
Aug 23
BRU3:15 pmBrussels Bruxelles-National
39h 22m
2 stops
STL11:37 pmLambert-St Louis
$941

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 26, 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 8/31

1:30 pm-2:35 pm

2 stops18h 05m

Brussels Bruxelles-National

Thu 9/10

10:20 am-11:37 pm

2 stops20h 17m

$788

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$873

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$878

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-11:25 pm

2 stops33h 35m

$886

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 8/31

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Thu 9/10

9:25 am-11:06 am

2 stops32h 41m

$896
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 8/31

3:30 pm-12:45 pm

1 stop14h 15m

Brussels Bruxelles-National

Thu 9/10

9:25 am-6:41 pm

1 stop16h 16m

$904

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

6:06 am-3:05 pm

2 stops25h 59m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-8:08 pm

2 stops30h 18m

$907

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

7:44 am-10:35 pm

2 stops31h 51m

Brussels Bruxelles-National

Mon 10/5

7:05 pm-7:46 pm

2 stops31h 41m

$921

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

Mon 10/5

10:50 am-11:25 pm

2 stops19h 35m

$928

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-11:25 pm

2 stops33h 35m

$931

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
7,953 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,656 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.

An easier way to manage your Brussels trip

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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