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$505+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
1 adult, Economy
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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 November 10, 2025.

This KAYAK deal was found by Cheapflights users on 11/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2711:04 amSTL - BRU
2 stops39h 36mScandinavian Airlines
Thu 12/410:20 amBRU - STL
2 stops20h 22mScandinavian Airlines
Deal found 11/8$678
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Thu 11/2710:00 amSTL - BRU
1 stop15h 55mUnited Airlines
Thu 12/410:00 amBRU - STL
2 stops35h 23mUnited Airlines
Deal found 11/8$684
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Mon 12/153:19 pmSTL - BRU
2 stops14h 56mUnited Airlines
Thu 12/2511:55 amBRU - STL
1 stop14h 27mUnited Airlines
Deal found 11/9$723
This Delta deal was found by Cheapflights users on 11/8. 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.
Tue 12/237:02 pmSTL - BRU
2 stops29h 33mDelta
Tue 12/306:15 amBRU - STL
2 stops23h 01mDelta
Deal found 11/8$773
This Cheapflightsfares deal was found by Cheapflights users on 11/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:39 amSTL - BRU
2 stops17h 56mAer Lingus
Thu 11/2010:15 amBRU - STL
2 stops20h 41mAer Lingus
Deal found 11/8$1,059
This eDestinos deal was found by Cheapflights users on 11/8. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/96:00 amSTL - BRU
2 stops20h 35mAer Lingus
Sun 11/168:50 pmBRU - STL
2 stops31h 10mAer Lingus
Deal found 11/8$1,111
This Lufthansa deal was found by Cheapflights users on 11/9. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:50 pmSTL - BRU
1 stop18h 40mLufthansa
Wed 12/317:00 amBRU - STL
1 stop13h 55mLufthansa
Deal found 11/9$1,113
This KLM deal was found by Cheapflights users on 11/8. 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.
Tue 12/234:55 pmSTL - BRU
1 stop33h 05mKLM
Tue 12/3010:45 amBRU - STL
2 stops16h 56mKLM
Deal found 11/8$1,181
This Ovago deal was found by Cheapflights users on 11/8. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:35 pmSTL - BRU
1 stop31h 20mLufthansa
Tue 12/3010:30 amBRU - STL
1 stop34h 25mLufthansa
Deal found 11/8$1,187

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 November 10, 2025.

Round-trip from

$480
(United Airlines)

Popular in

December

Cheapest in

November

Average price

$680
From Lambert-St Louis to Brussels
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($305 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($111 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 10, 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

Wed 1/28

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 2/4

10:10 am-5:43 pm

1 stop14h 33m

$505

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 1/30

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Mon 2/2

10:10 am-10:58 pm

1 stop19h 48m

$505

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 1/28

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Tue 2/3

10:10 am-9:13 pm

1 stop18h 03m

$505

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 1/30

11:20 am-8:55 am

1 stop14h 35m

Brussels Bruxelles-National

Wed 2/4

10:10 am-4:03 pm

1 stop12h 53m

$507

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

Tue 2/3

11:15 am-5:18 pm

1 stop13h 03m

$507

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 1/28

1:15 pm-8:55 am

1 stop12h 40m

Brussels Bruxelles-National

Mon 2/2

11:15 am-5:18 pm

1 stop13h 03m

$507

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

9:59 am-7:35 am

2 stops14h 36m

Brussels Bruxelles-National

Wed 2/4

10:45 am-8:39 pm

2 stops16h 54m

$526

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 11/27

11:04 am-9:40 am

2 stops39h 36m

Brussels Bruxelles-National

Thu 12/4

10:20 am-11:42 pm

2 stops20h 22m

$678

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 11/27

10:00 am-8:55 am

1 stop15h 55m

Brussels Bruxelles-National

Thu 12/4

10:00 am-2:23 pm

2 stops35h 23m

$684

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

3:19 pm-1:15 pm

2 stops14h 56m

Brussels Bruxelles-National

Thu 12/25

11:55 am-7:22 pm

1 stop14h 27m

$723

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/8

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, February is the cheapest month in which you can book a flight from St. Louis to Brussels (average of $615). Flying from St. Louis to Brussels in June is currently the most expensive (average of $1,008). 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 November 10, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 33% on flights from St. Louis to Brussels by exploring options for tickets in the afternoon.

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 November 10, 2025.
Read through reviews of airlines operating flights from St. Louis to Brussels, such as United Airlines and Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,012 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,012 reviews
United Airlines
7.4
Good
9,012 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,565 reviews
United Airlines
7.4
Good
9,012 reviews

Entertainment

7.1

Crew

8.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 2 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Brussels?

    United Airlines can get you from St. Louis to Brussels in just under 14h 10m. Your travel time can differ by up to . The distance between St. Louis and Brussels is about 4393 mi.

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

    Currently priced at $654, United Airlines will fly you from St. Louis to Brussels and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Lufthansa for as low as $829. These flights start at 33% 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, February is the cheapest month in which you can book a flight from St. Louis to Brussels (average of $615). Flying from St. Louis to Brussels in June is currently the most expensive (average of $1,008). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Brussels

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

Top 2 airlines flying from St. Louis to Brussels

Discover the top 2 airlines 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 November 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$654Average$791FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$829Average$2,205FlexibilityNo cancel feeOn-time76%

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