Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Brussels from $391

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
4:15 pm - 1:15 pm
STL
-
BRU
14h 00m
2 stops
Air Canada Logo
10:00 am - 2:18 pm
BRU
-
STL
35h 18m
2 stops
$758Air Canada
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
3:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
10:10 am - 7:25 pm
BRU
-
STL
16h 15m
1 stop
$775United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
10:23 am - 8:55 am
STL
-
BRU
15h 32m
1 stop
United Airlines Logo
10:10 am - 6:09 pm
BRU
-
STL
14h 59m
1 stop
$778United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
11:45 am - 1:15 pm
STL
-
BRU
18h 30m
2 stops
United Airlines Logo
4:55 pm - 6:09 pm
BRU
-
STL
32h 14m
2 stops
$793United Airlines
Tue, Nov 24 - Wed, Dec 2
Multiple Airlines Logo
4:15 pm - 1:15 pm
STL
-
BRU
14h 00m
2 stops
Multiple Airlines Logo
7:00 am - 1:45 pm
BRU
-
STL
13h 45m
1 stop
$819Multiple Airlines
Tue, Nov 24 - Wed, Dec 2
Air Canada Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Air Canada Logo
9:30 am - 6:42 pm
BRU
-
STL
16h 12m
1 stop
$824Air Canada
Sun, Aug 2 - Tue, Aug 11
United Airlines Logo
3:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
7:00 am - 1:45 pm
BRU
-
STL
13h 45m
1 stop
$828United Airlines
Tue, Nov 24 - Wed, Dec 2
Air Canada Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Air Canada Logo
9:30 am - 8:22 pm
BRU
-
STL
17h 52m
2 stops
$829Air Canada
Sun, Aug 2 - Tue, Aug 11
United Airlines Logo
10:23 am - 8:55 am
STL
-
BRU
15h 32m
1 stop
United Airlines Logo
7:00 am - 1:45 pm
BRU
-
STL
13h 45m
1 stop
$832United Airlines
Tue, Nov 24 - Wed, Dec 2
Air Canada Logo
8:55 am - 7:10 am
STL
-
BRU
15h 15m
2 stops
Air Canada Logo
9:30 am - 8:22 pm
BRU
-
STL
17h 52m
2 stops
$842Air Canada
Sun, Aug 2 - Tue, Aug 11

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

KLM flights from St. Louis to Brussels

Our best KLM deals on St. Louis to Brussels flight tickets
KLM
Sep 1
STL12:52 pmLambert-St Louis
11h 48m
1 stop
BRU7:40 amBrussels Bruxelles-National
Sep 30
BRU9:45 amBrussels Bruxelles-National
13h 09m
1 stop
STL3:54 pmLambert-St Louis
$916
KLM
Jul 6
STL5:36 pmLambert-St Louis
14h 04m
2 stops
BRU2:40 pmBrussels Bruxelles-National
Jul 21
BRU9:45 amBrussels Bruxelles-National
19h 30m
1 stop
STL10:15 pmLambert-St Louis
$1,266
KLM
Jul 6
STL10:20 amLambert-St Louis
14h 15m
2 stops
BRU7:35 amBrussels Bruxelles-National
Jul 21
BRU3:10 pmBrussels Bruxelles-National
15h 43m
2 stops
STL11:53 pmLambert-St Louis
$1,275

Air France flights from St. Louis to Brussels

Our best Air France deals on St. Louis to Brussels flight tickets
Air France
Jul 6
STL10:51 amLambert-St Louis
13h 49m
1 stop
BRU7:40 amBrussels Bruxelles-National
Jul 21
BRU9:45 amBrussels Bruxelles-National
19h 30m
1 stop
STL10:15 pmLambert-St Louis
$1,257
Air France
Jul 1
STL10:51 amLambert-St Louis
13h 49m
1 stop
BRU7:40 amBrussels Bruxelles-National
Jul 8
BRU9:45 amBrussels Bruxelles-National
15h 08m
1 stop
STL5:53 pmLambert-St Louis
$1,386

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 June 16, 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 11/16

4:15 pm-1:15 pm

2 stops14h 00m

Brussels Bruxelles-National

Thu 11/19

10:00 am-2:18 pm

2 stops35h 18m

$758

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Thu 11/19

10:10 am-7:25 pm

1 stop16h 15m

$775

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

10:23 am-8:55 am

1 stop15h 32m

Brussels Bruxelles-National

Thu 11/19

10:10 am-6:09 pm

1 stop14h 59m

$778

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 11/24

11:45 am-1:15 pm

2 stops18h 30m

Brussels Bruxelles-National

Wed 12/2

4:55 pm-6:09 pm

2 stops32h 14m

$793
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 11/24

4:15 pm-1:15 pm

2 stops14h 00m

Brussels Bruxelles-National

Wed 12/2

7:00 am-1:45 pm

1 stop13h 45m

$819

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/2

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 8/11

9:30 am-6:42 pm

1 stop16h 12m

$824

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 11/24

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Wed 12/2

7:00 am-1:45 pm

1 stop13h 45m

$828

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/2

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 8/11

9:30 am-8:22 pm

2 stops17h 52m

$829

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 11/24

10:23 am-8:55 am

1 stop15h 32m

Brussels Bruxelles-National

Wed 12/2

7:00 am-1:45 pm

1 stop13h 45m

$832

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/2

8:55 am-7:10 am

2 stops15h 15m

Brussels Bruxelles-National

Tue 8/11

9:30 am-8:22 pm

2 stops17h 52m

$842

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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.
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
8,066 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,843 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 7/16
Thu 7/23
By creating a price alert you accept our terms of use and privacy policy.

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