Latest deals
Insights
FAQs
Reviews
Price Alerts

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

Discover deals from 900+ travel sites with momondo.

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

Find the cheapest flights from St. Louis to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:06 am - 2:25 pm
STL
-
BRU
24h 19m
2 stops
Multiple Airlines Logo
8:50 pm - 11:59 pm
BRU
-
STL
34h 09m
2 stops
$961Multiple Airlines
Mon, Aug 3 - Mon, Aug 17
United Airlines Logo
1:13 pm - 1:15 pm
STL
-
BRU
17h 02m
2 stops
United Airlines Logo
10:15 am - 9:26 pm
BRU
-
STL
18h 11m
1 stop
$994United Airlines
Tue, Jul 14 - Fri, Jul 24
United Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
United Airlines Logo
10:15 am - 9:26 pm
BRU
-
STL
18h 11m
1 stop
$996United Airlines
Sun, Jul 12 - Fri, Jul 24
KLM Logo
10:51 am - 7:40 am
STL
-
BRU
13h 49m
1 stop
KLM Logo
9:45 am - 10:15 pm
BRU
-
STL
19h 30m
1 stop
$997KLM
Mon, Jul 6 - Tue, Jul 21
Air Canada Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Air Canada Logo
9:40 am - 2:02 pm
BRU
-
STL
35h 22m
2 stops
$998Air Canada
Sun, Jul 12 - Fri, Jul 24
Air Canada Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Air Canada Logo
9:40 am - 9:26 pm
BRU
-
STL
18h 46m
2 stops
$999Air Canada
Sun, Jul 19 - Wed, Jul 29
United Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
United Airlines Logo
12:00 pm - 12:11 pm
BRU
-
STL
31h 11m
2 stops
$1,000United Airlines
Sun, Jul 19 - Tue, Jul 28
United Airlines Logo
7:05 pm - 9:00 am
STL
-
BRU
30h 55m
1 stop
United Airlines Logo
10:15 am - 9:26 pm
BRU
-
STL
18h 11m
1 stop
$1,002United Airlines
Sat, Jul 11 - Fri, Jul 24
Delta Logo
3:39 pm - 7:40 am
STL
-
BRU
33h 01m
1 stop
Delta Logo
9:45 am - 11:53 pm
BRU
-
STL
21h 08m
1 stop
$1,003Delta
Sat, Jul 18 - Thu, Jul 30
United Airlines Logo
3:22 pm - 1:15 pm
STL
-
BRU
14h 53m
2 stops
United Airlines Logo
10:30 am - 9:26 pm
BRU
-
STL
17h 56m
2 stops
$1,004United Airlines
Mon, Jul 20 - Thu, Jul 30

KLM flights from St. Louis to Brussels

Our best KLM deals on St. Louis to Brussels flight tickets
KLM
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
$997
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
$1,006
KLM
May 21
STL10:49 amLambert-St Louis
13h 51m
1 stop
BRU7:40 amBrussels Bruxelles-National
May 28
BRU9:45 amBrussels Bruxelles-National
18h 53m
1 stop
STL9:38 pmLambert-St Louis
$1,383

American Airlines flights from St. Louis to Brussels

Our best American Airlines deals on St. Louis to Brussels flight tickets
American Airlines
Sep 8
STL8:06 pmLambert-St Louis
17h 19m
2 stops
BRU8:25 pmBrussels Bruxelles-National
Sep 15
BRU7:05 amBrussels Bruxelles-National
19h 58m
2 stops
STL8:03 pmLambert-St Louis
$866
American Airlines
Sep 22
STL5:46 pmLambert-St Louis
14h 29m
2 stops
BRU3:15 pmBrussels Bruxelles-National
Sep 30
BRU11:00 amBrussels Bruxelles-National
17h 23m
2 stops
STL9:23 pmLambert-St Louis
$873
American Airlines
Sep 30
STL9:35 pmLambert-St Louis
15h 50m
1 stop
BRU8:25 pmBrussels Bruxelles-National
Oct 5
BRU10:50 amBrussels Bruxelles-National
19h 41m
2 stops
STL11:31 pmLambert-St Louis
$928

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 May 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

Mon 8/3

7:06 am-2:25 pm

2 stops24h 19m

Brussels Bruxelles-National

Mon 8/17

8:50 pm-11:59 pm

2 stops34h 09m

$961

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 7/14

1:13 pm-1:15 pm

2 stops17h 02m

Brussels Bruxelles-National

Fri 7/24

10:15 am-9:26 pm

1 stop18h 11m

$994
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 7/12

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Fri 7/24

10:15 am-9:26 pm

1 stop18h 11m

$996

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 7/6

10:51 am-7:40 am

1 stop13h 49m

Brussels Bruxelles-National

Tue 7/21

9:45 am-10:15 pm

1 stop19h 30m

$997

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 7/12

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Fri 7/24

9:40 am-2:02 pm

2 stops35h 22m

$998

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 7/19

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Wed 7/29

9:40 am-9:26 pm

2 stops18h 46m

$999

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 7/19

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 7/28

12:00 pm-12:11 pm

2 stops31h 11m

$1,000

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 7/11

7:05 pm-9:00 am

1 stop30h 55m

Brussels Bruxelles-National

Fri 7/24

10:15 am-9:26 pm

1 stop18h 11m

$1,002

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 7/18

3:39 pm-7:40 am

1 stop33h 01m

Brussels Bruxelles-National

Thu 7/30

9:45 am-11:53 pm

1 stop21h 08m

$1,003

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 7/20

3:22 pm-1:15 pm

2 stops14h 53m

Brussels Bruxelles-National

Thu 7/30

10:30 am-9:26 pm

2 stops17h 56m

$1,004

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

10h 30m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 10h 30m
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 10h 30m.

  • 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
7,984 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,692 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
Mon 6/8
Mon 6/15
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