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Cheap flights from St. Louis to Belgium from $337

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 Belgium departing on 6/5. 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

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Find the cheapest flights from St. Louis to Belgium

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
9:35 pm - 3:05 pm
STL
-
BRU
10h 30m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$883British 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 - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$884British Airways
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
Multiple Airlines Logo
8:40 pm - 7:46 pm
BRU
-
STL
30h 06m
2 stops
$897Multiple Airlines
Wed, Sep 16 - Sun, Sep 27
British Airways Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$900British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$901British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$902British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
British Airways Logo
8:50 pm - 6:26 pm
BRU
-
STL
52h 36m
2 stops
$910British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:46 am - 3:05 pm
STL
-
BRU
22h 19m
2 stops
British Airways Logo
8:50 pm - 6:26 pm
BRU
-
STL
52h 36m
2 stops
$911British Airways
Wed, Sep 30 - Mon, Oct 5
KLM Logo
1:30 pm - 7:40 am
STL
-
BRU
11h 10m
1 stop
KLM Logo
9:45 am - 8:50 pm
BRU
-
STL
18h 05m
1 stop
$977KLM
Wed, Sep 16 - Sun, Sep 27
Multiple Airlines Logo
8:55 am - 3:45 pm
STL
-
CRL
23h 50m
2 stops
Multiple Airlines Logo
3:45 pm - 1:25 pm
CRL
-
STL
28h 40m
2 stops
$1,665Multiple Airlines
Wed, Sep 16 - Sun, Sep 27

British Airways flights from St. Louis to Belgium

Our best British Airways deals on St. Louis to Belgium flight tickets
British Airways
Sep 30
STL9:35 pmLambert-St Louis
10h 30m
1 stop
BRU3:05 pmBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
29h 40m
1 stop
STL7:30 pmLambert-St Louis
$883
British Airways
Sep 30
STL9:35 pmLambert-St Louis
10h 30m
1 stop
BRU3:05 pmBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
29h 40m
1 stop
STL7:30 pmLambert-St Louis
$884
British Airways
Sep 30
STL9:46 amLambert-St Louis
22h 19m
2 stops
BRU3:05 pmBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
29h 40m
1 stop
STL7:30 pmLambert-St Louis
$900

Delta flights from St. Louis to Belgium

Our best Delta deals on St. Louis to Belgium flight tickets
Delta
Jul 6
STL9:21 amLambert-St Louis
15h 19m
1 stop
BRU7:40 amBrussels Bruxelles-National
Jul 14
BRU9:45 amBrussels Bruxelles-National
15h 21m
1 stop
STL6:06 pmLambert-St Louis
$1,186
Delta
Jul 6
STL9:21 amLambert-St Louis
15h 19m
1 stop
BRU7:40 amBrussels Bruxelles-National
Jul 16
BRU8:05 amBrussels Bruxelles-National
16h 48m
2 stops
STL5:53 pmLambert-St Louis
$1,194
Delta
Jul 6
STL7:08 amLambert-St Louis
17h 32m
1 stop
BRU7:40 amBrussels Bruxelles-National
Jul 19
BRU9:45 amBrussels Bruxelles-National
19h 27m
1 stop
STL10:12 pmLambert-St Louis
$1,256

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 April 12, 2026.
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

Cheapest round-trip

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-7:30 pm

1 stop29h 40m

$883

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-7:30 pm

1 stop29h 40m

$884

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/16

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Sun 9/27

8:40 pm-7:46 pm

2 stops30h 06m

$897

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$900

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$901

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$902

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-6:26 pm

2 stops52h 36m

$910

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:46 am-3:05 pm

2 stops22h 19m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-6:26 pm

2 stops52h 36m

$911
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/16

1:30 pm-7:40 am

1 stop11h 10m

Brussels Bruxelles-National

Sun 9/27

9:45 am-8:50 pm

1 stop18h 05m

$977

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Wed 9/16

8:55 am-3:45 pm

2 stops23h 50m

Charleroi Brussels

Sun 9/27

3:45 pm-1:25 pm

2 stops28h 40m

$1,665

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 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 $494. If you are unable to visit Belgium 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.

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

You could potentially save up to 5% 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

Fastest flight time

12h 47m

Direct flights

None
The fastest flight from St. Louis to Belgium takes 12h 47m
There are no direct flights from St. Louis to Belgium. There are no popular flight routes from St. Louis to Belgium.
Search flight deals

Frequently asked questions about flying from St. Louis to Belgium

  • 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
LufthansaPriceFrom $441Free CancellationRating
6.8
7,913 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,574 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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