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Cheap flights from St. Louis to Belgium from $584

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Belgium departing on 11/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

United Airlines Logo
3:14 pm - 8:55 amSTL-BRU
10h 41m1 stop
United Airlines Logo
10:00 am - 3:49 pmBRU-STL
36h 49m2 stops
$584United Airlines
Find Deal
Tue, Nov 4 - Tue, Nov 11
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 2:25 pmBRU-STL
35h 25m2 stops
$589Air Canada
Find Deal
Wed, Nov 12 - Wed, Nov 19
Air Canada Logo
1:30 pm - 8:00 amSTL-BRU
11h 30m1 stop
Air Canada Logo
10:00 am - 12:25 pmBRU-STL
33h 25m2 stops
$602Air Canada
Find Deal
Sun, Aug 10 - Tue, Aug 19
United Airlines Logo
12:31 pm - 8:55 amSTL-BRU
13h 24m1 stop
United Airlines Logo
10:10 am - 5:39 pmBRU-STL
14h 29m1 stop
$607United Airlines
Find Deal
Tue, Nov 4 - Tue, Nov 11
British Airways Logo
11:57 am - 10:50 amSTL-BRU
15h 53m2 stops
British Airways Logo
11:45 am - 4:11 pmBRU-STL
35h 26m2 stops
$644British Airways
Find Deal
Tue, Dec 9 - Fri, Dec 19
Scandinavian Airlines Logo
3:36 pm - 9:40 amSTL-BRU
35h 04m2 stops
Scandinavian Airlines Logo
4:00 pm - 11:41 pmBRU-STL
38h 41m2 stops
$652Scandinavian Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 8
Lufthansa Logo
10:57 am - 7:45 amSTL-BRU
13h 48m1 stop
Lufthansa Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
$677Lufthansa
Find Deal
Sun, Aug 10 - Tue, Aug 19
Lufthansa Logo
1:42 pm - 1:15 pmSTL-BRU
16h 33m2 stops
Lufthansa Logo
7:00 am - 8:46 pmBRU-STL
20h 46m2 stops
$700Lufthansa
Find Deal
Sun, Aug 10 - Tue, Aug 19
British Airways Logo
6:30 pm - 10:50 amSTL-BRU
33h 20m2 stops
British Airways Logo
8:45 pm - 4:14 pmBRU-STL
26h 29m2 stops
$713British Airways
Find Deal
Mon, Dec 29 - Mon, Jan 5
Scandinavian Airlines Logo
3:40 pm - 7:50 pmSTL-BRU
21h 10m2 stops
Scandinavian Airlines Logo
8:30 pm - 11:24 pmBRU-STL
33h 54m2 stops
$750Scandinavian Airlines
Find Deal
Thu, Sep 25 - Thu, Oct 2

United Airlines flights from St. Louis to Belgium

Our best United Airlines deals on St. Louis to Belgium flight tickets
United Airlines
Nov 4
STL3:14 pmLambert-St Louis
10h 41m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 11
BRU10:00 amBrussels Bruxelles-National
36h 49m
2 stops
STL3:49 pmLambert-St Louis
$584
Find similar
United Airlines
Nov 4
STL12:31 pmLambert-St Louis
13h 24m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 11
BRU10:10 amBrussels Bruxelles-National
14h 29m
1 stop
STL5:39 pmLambert-St Louis
$607
Find similar
United Airlines
Dec 9
STL11:25 amLambert-St Louis
14h 30m
1 stop
BRU8:55 amBrussels Bruxelles-National
Dec 19
BRU7:00 amBrussels Bruxelles-National
13h 55m
1 stop
STL1:55 pmLambert-St Louis
$609
Find similar

Air Canada flights from St. Louis to Belgium

Our best Air Canada deals on St. Louis to Belgium flight tickets
Air Canada
Nov 12
STL4:05 pmLambert-St Louis
14h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 19
BRU10:00 amBrussels Bruxelles-National
35h 25m
2 stops
STL2:25 pmLambert-St Louis
$589
Find similar
Air Canada
Aug 10
STL1:30 pmLambert-St Louis
11h 30m
1 stop
BRU8:00 amBrussels Bruxelles-National
Aug 19
BRU10:00 amBrussels Bruxelles-National
33h 25m
2 stops
STL12:25 pmLambert-St Louis
$602
Find similar
Air Canada
Aug 10
STL1:30 pmLambert-St Louis
11h 30m
1 stop
BRU8:00 amBrussels Bruxelles-National
Aug 19
BRU10:00 amBrussels Bruxelles-National
17h 00m
1 stop
STL8:00 pmLambert-St Louis
$612
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Belgium 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 31, 2025.
Use the filters below to find and compare flights from St. Louis to Belgium that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 11/4

3:14 pm-8:55 am

1 stop10h 41m

Brussels Bruxelles-National

Tue 11/11

10:00 am-3:49 pm

2 stops36h 49m

$584

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 11/19

10:00 am-2:25 pm

2 stops35h 25m

$589

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/10

1:30 pm-8:00 am

1 stop11h 30m

Brussels Bruxelles-National

Tue 8/19

10:00 am-12:25 pm

2 stops33h 25m

$602

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 11/4

12:31 pm-8:55 am

1 stop13h 24m

Brussels Bruxelles-National

Tue 11/11

10:10 am-5:39 pm

1 stop14h 29m

$607

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 12/9

11:57 am-10:50 am

2 stops15h 53m

Brussels Bruxelles-National

Fri 12/19

11:45 am-4:11 pm

2 stops35h 26m

$644

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/24

3:36 pm-9:40 am

2 stops35h 04m

Brussels Bruxelles-National

Wed 10/8

4:00 pm-11:41 pm

2 stops38h 41m

$652

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/10

10:57 am-7:45 am

1 stop13h 48m

Brussels Bruxelles-National

Tue 8/19

10:00 am-8:00 pm

1 stop17h 00m

$677

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/10

1:42 pm-1:15 pm

2 stops16h 33m

Brussels Bruxelles-National

Tue 8/19

7:00 am-8:46 pm

2 stops20h 46m

$700

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/29

6:30 pm-10:50 am

2 stops33h 20m

Brussels Bruxelles-National

Mon 1/5

8:45 pm-4:14 pm

2 stops26h 29m

$713

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 9/25

3:40 pm-7:50 pm

2 stops21h 10m

Brussels Bruxelles-National

Thu 10/2

8:30 pm-11:24 pm

2 stops33h 54m

$750

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Belgium from

How to get the cheapest flight ticket from St. Louis to Belgium

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 cheapest month to fly to Belgium?

In general, February is the cheapest month to fly from St. Louis to Belgium. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $690. If you are unable to visit Belgium during the month of February, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $725.

What is the cheapest day to depart on your flight to Belgium?

Our data shows that Friday is the least expensive day to fly to Belgium. Tickets to fly out on this day can be as low as $1,035. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $1,431. These prices are subject to change though, so be sure to set up a Price Alert for flights to Belgium.

What is the cheapest time of day to depart on your flight to Belgium?

Our most recent data shows that the best time of day to fly to Belgium is in the afternoon. Flights from St. Louis to Belgium during this time can be as low as $1,088. Flights to Belgium are more costly at noon, with an average ticket price of $1,420. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on St. Louis to Belgium flights?

You could potentially save up to 3% on your flight if you consider stops on a St. Louis to Belgium flight.

Cheap St. Louis to Belgium flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Belgium

Best Price Found

$584

Fastest flight time

10h 36m

Direct flights

None

Airports in Belgium

1 airport
The best flight deal from St. Louis to Belgium found on momondo in the last 72 hours is $584
The fastest flight from St. Louis to Belgium takes 10h 36m
There are no direct flights from St. Louis to Belgium. Popular non-direct route for this connection is Lambert-St Louis Airport - Brussels Bruxelles-National Airport.
There is 1 airport near Belgium: Brussels Bruxelles-National (BRU)
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Belgium?

    Prices for flights from Lambert-St Louis Airport to Belgium are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Belgium?

  • How old do you have to be to fly from Lambert-St Louis Airport to Belgium?

    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 Belgium.

  • What documentation or ID do you need to fly to Belgium?

    The travel and health documents required for your trip to Belgium 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 Belgium. 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 Belgium

Compare and see reviews for airlines that fly from St. Louis to Belgium with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $628Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Belgium?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Belgium. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Belgium with flexible booking policies on momondo?

Flights from St. Louis to Belgium with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Belgium?

Once all potential St. Louis to Belgium flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Belgium right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Belgium flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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