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$729+ Cheap flights from St. Louis (STL) to Brussels

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Apr 30 — May 71
Wed 4/30
Wed 5/7
1 adult, Economy
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Cheap flight deals from St. Louis to Brussels

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Brussels (BR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 25, 2025.

Round-trip from

$772
(FlightHub)

Popular in

June

Cheapest in

February

Average price

$1,094
From Lambert-St Louis to Brussels
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($234 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from St. Louis to Brussels

Cheapest flights from St. Louis to Brussels
Explore the most affordable flight options available from St. Louis to Brussels. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2025.

This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:15 pmSTL - BRU
1 stop10h 40mUnited Airlines
Tue 12/3010:10 amBRU - STL
1 stop12h 11mUnited Airlines
Deal found 4/23$729
This Air Canada deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:15 pmSTL - BRU
2 stops33h 40mAir Canada
Tue 12/3010:00 amBRU - STL
2 stops36h 26mAir Canada
Deal found 4/23$731
This oojo deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:57 pmSTL - BRU
2 stops18h 38mBritish Airways
Wed 12/3111:50 amBRU - STL
2 stops17h 31mBritish Airways
Deal found 4/23$759
This FlightHub deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/121:30 pmSTL - BRU
1 stop11h 35mMultiple Airlines
Mon 5/264:25 pmBRU - STL
2 stops30h 05mMultiple Airlines
Deal found 4/25$772
This Delta deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:00 amSTL - BRU
2 stops18h 35mDelta
Tue 12/308:05 amBRU - STL
2 stops15h 06mDelta
Deal found 4/23$778
This KLM deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:17 pmSTL - BRU
2 stops13h 58mKLM
Thu 1/18:05 amBRU - STL
2 stops15h 06mKLM
Deal found 4/23$1,141
This oojo deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/46:00 pmSTL - BRU
2 stops34h 25mIberia
Wed 5/77:05 amBRU - STL
2 stops18h 28mIberia
Deal found 4/25$2,753
This AranGrant deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/45:29 pmSTL - BRU
1 stop32h 31mLufthansa
Wed 5/77:00 amBRU - STL
1 stop13h 30mLufthansa
Deal found 4/25$3,118

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated April 25, 2025.
Use the filters below to find and compare flights from St. Louis to Brussels that are best for you.

Fly from

St. Louis

Fly to

Brussels

Route

Depart

Return

Price

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/12

1:30 pm-8:05 am

1 stop11h 35m

Brussels Bruxelles-National

Mon 5/26

4:25 pm-3:30 pm

2 stops30h 05m

$772

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/12

7:19 pm-7:35 pm

2 stops17h 16m

Brussels Bruxelles-National

Mon 5/26

9:15 pm-3:21 pm

2 stops25h 06m

$773

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/12

5:29 pm-9:00 am

1 stop32h 31m

Brussels Bruxelles-National

Mon 5/26

9:40 am-12:36 pm

1 stop33h 56m

$788

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/26

1:30 pm-8:05 am

1 stop11h 35m

Brussels Bruxelles-National

Mon 6/9

10:00 am-7:58 pm

1 stop16h 58m

$1,009

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 7/11

1:20 pm-9:00 am

1 stop12h 40m

$1,512

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Best time to book a flight from St. Louis to Brussels

Have a flexible travel schedule? Discover the best time to fly to Brussels from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Brussels

What is the cheapest month to book a flight from St. Louis to Brussels?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Brussels (average of $614). Flying from St. Louis to Brussels in June is currently the most expensive (average of $1,146). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to BRU?

Find hourly flight availability from St. Louis to Brussels. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 25, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 32% on flights from St. Louis to Brussels by exploring options for tickets in the afternoon.

Rainfall in Brussels by month

Plan your trip to Brussels by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Brussels ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. August is typically the driest time to visit Brussels when rainfall is around 1.6 in.

Temperature in Brussels by month

Plan your trip to Brussels by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Brussels, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).

Reviews of airlines servicing Brussels

Get insights into the airlines that provide service to Brussels. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Brussels. Reviews last updated April 25, 2025.
United Airlines
7.4
Good
8,685 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,685 reviews
United Airlines
7.4
Good
8,685 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,207 reviews
United Airlines
7.4
Good
8,685 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.7
Okay
7,030 reviews
United Airlines
7.4
Good
8,685 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.6
Okay
6,815 reviews
United Airlines
7.4
Good
8,685 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Brussels. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Brussels?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Brussels. On average, Lambert-St Louis has 0 outbound flights to Brussels per day from 1 airline. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • What are the cheapest airlines flying from St. Louis to Brussels round-trip?

    Currently priced at $773, British Airways will fly you from St. Louis to Brussels and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Air Canada - these airlines can fly you to your destination from $788 and $1,009, respectively. These flights start at 24% lower than the current average price 3 months from now.

  • Can I find deals for flights from St. Louis to Brussels that include hotel bookings?

    Yes. In addition to deals on St. Louis to Brussels flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Brussels?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Brussels.

  • Can I find deals for business class flights from St. Louis to Brussels?

    Yes. Cheapflights offers flight deals from St. Louis to Brussels by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Brussels?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Brussels (average of $614). Flying from St. Louis to Brussels in June is currently the most expensive (average of $1,146). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Brussels

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Bruxelles-National flights
St. Louis to Bruxelles-National flights
St. Louis to Charleroi Brussels flights
Springfield to Bruxelles-National flights

Top airline flying from St. Louis to Brussels

Discover the top airline that operate flights from St. Louis to Brussels. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$578Average$1,051FlexibilityNo cancel feeOn-time69%

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