$727+ Cheap flights from St. Louis (STL) to Belgium
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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Oct 2 — Oct 91
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Belgium with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Belgium
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to BelgiumExplore the most affordable flight options available from St. Louis to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 2, 2026.
Explore the most affordable flight options available from St. Louis to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 2, 2026.
This United Airlines deal was found by Cheapflights users on 9/1. 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 12/71:19 pm -
2 stops16h 56m
Fri 12/1110:00 am -
2 stops37h 19m
Deal found 9/1![United Airlines logo]()
$727
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/2811:29 am -
1 stop14h 36m
Wed 11/1110:00 am -
2 stops33h 10m
Deal found 8/31![United Airlines logo]()
$808
This United deal was found by Cheapflights users on 8/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:30 am -
1 stop19h 25m
Wed 11/118:25 am -
1 stop12h 20m
Deal found 8/31![Multiple Airlines logo]()
$824
This Gotogate deal was found by Cheapflights users on 8/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:40 pm -
2 stops15h 35m
Tue 10/209:10 am -
1 stop16h 31m
Deal found 8/29![Multiple Airlines logo]()
$880
This Mytrip deal was found by Cheapflights users on 8/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:10 pm -
2 stops24h 50m
Tue 10/209:10 am -
2 stops34h 03m
Deal found 8/29![Air Canada logo]()
$883
This Mytrip deal was found by Cheapflights users on 8/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:40 pm -
2 stops17h 30m
Fri 10/29:50 am -
2 stops17h 30m
Deal found 8/28![Multiple Airlines logo]()
$1,874
Best flights from St. Louis to BelgiumDiscover carefully curated flight deals from St. Louis to Belgium that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 2, 2026.
Discover carefully curated flight deals from St. Louis to Belgium that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 2, 2026.
This United Airlines deal was found by Cheapflights users on 9/1. 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 12/71:19 pm -
2 stops16h 56m
Fri 12/1110:00 am -
2 stops37h 19m
Deal found 9/1![United Airlines logo]()
$727
This Priceline deal was found by Cheapflights users on 8/28. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/511:31 am -
2 stops16h 19m
Mon 7/58:50 pm -
1 stop29h 40m
Deal found 8/28![British Airways logo]()
$903
This FlightHub deal was found by Cheapflights users on 8/29. 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.
Wed 9/3012:10 pm -
2 stops24h 50m
Mon 10/52:25 pm -
1 stop30h 00m
Deal found 8/29![Multiple Airlines logo]()
$935
This United Airlines deal was found by Cheapflights users on 9/1. 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.
Fri 10/1612:10 pm -
2 stops18h 05m
Fri 10/239:10 am -
2 stops36h 06m
Deal found 9/1![United Airlines logo]()
$943
This Gotogate deal was found by Cheapflights users on 9/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:10 pm -
1 stop12h 00m
Wed 10/76:20 am -
1 stop14h 05m
Deal found 9/2![Multiple Airlines logo]()
$966
This United Airlines deal was found by Cheapflights users on 9/1. 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 10/2112:10 pm -
2 stops18h 05m
Sun 10/2510:10 am -
1 stop19h 14m
Deal found 9/1![United Airlines logo]()
$972
This Mytrip deal was found by Cheapflights users on 8/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:40 pm -
2 stops17h 30m
Fri 10/29:50 am -
2 stops17h 30m
Deal found 8/28![Multiple Airlines logo]()
$1,874
Last-minute flights from St. Louis to BelgiumDiscover last-minute flight deals from St. Louis to Belgium. Data last updated September 2, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Belgium. Data last updated September 2, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Fri 9/2512:10 pm -
2 stops18h 05m
Fri 10/29:10 am -
2 stops33h 23m
Deal found 8/28![United Airlines logo]()
$943
This Mytrip deal was found by Cheapflights users on 8/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:40 pm -
2 stops17h 30m
Fri 10/29:50 am -
2 stops17h 30m
Deal found 8/28![Multiple Airlines logo]()
$1,874
This FlightHub deal was found by Cheapflights users on 8/30. 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.
Wed 9/3012:10 pm -
1 stop12h 00m
Mon 10/57:30 pm -
1 stop24h 55m
Deal found 8/30![Multiple Airlines logo]()
$933
This Gotogate deal was found by Cheapflights users on 8/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:40 pm -
2 stops15h 35m
Tue 10/209:10 am -
1 stop16h 31m
Deal found 8/29![Multiple Airlines logo]()
$880
This Mytrip deal was found by Cheapflights users on 8/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:10 pm -
2 stops24h 50m
Tue 10/209:10 am -
2 stops34h 03m
Deal found 8/29![Air Canada logo]()
$883
This Gotogate deal was found by Cheapflights users on 8/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:40 pm -
2 stops22h 20m
Fri 10/308:25 am -
1 stop12h 20m
Deal found 8/31![Multiple Airlines logo]()
$886
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/2811:29 am -
1 stop14h 36m
Wed 11/1110:00 am -
2 stops33h 10m
Deal found 8/31![United Airlines logo]()
$808
This United deal was found by Cheapflights users on 8/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:30 am -
1 stop19h 25m
Wed 11/118:25 am -
1 stop12h 20m
Deal found 8/31![Multiple Airlines logo]()
$824
One-way flights from St. Louis to BelgiumSearch for one-way flight options from St. Louis to Belgium. Find affordable one-way fares based on user searches. Data last updated September 2, 2026.
Search for one-way flight options from St. Louis to Belgium. Find affordable one-way fares based on user searches. Data last updated September 2, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. 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.
Sat 9/199:23 am -
2 stops14h 52m
Deal found 8/31![United Airlines logo]()
$7,971
Find flight deals from St. Louis to Belgium
Keep the following information in mind while searching for St. Louis to Belgium flight deals. Data was last updated September 2, 2026.
Round-trip from | $727 (United Airlines) |
|---|---|
Popular in | December |
Cheapest in | February |
Average price | $829 |
Cheapflights 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, Cheapflights users made 7,457,451 searches. Data last updated September 2, 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
Cheapest round-trip
St. LouisBrussels
STL Lambert-St Louis - BRU Brussels Bruxelles-National
STLBRU
Lambert-St Louis
Mon 12/7
1:19 pm-1:15 pm
2 stops16h 56m
Brussels Bruxelles-National
Fri 12/11
10:00 am-4:19 pm
2 stops37h 19m
$727
St. LouisBrussels
STL Lambert-St Louis - BRU Brussels Bruxelles-National
STLBRU
Lambert-St Louis
Fri 2/5
11:31 am-10:50 am
2 stops16h 19m
Brussels Bruxelles-National
Mon 7/5
8:50 pm-7:30 pm
1 stop29h 40m
$903
St. LouisBrussels
STL Lambert-St Louis - BRU Brussels Bruxelles-National
STLBRU
Lambert-St Louis
Wed 9/30
12:10 pm-8:00 pm
2 stops24h 50m
Brussels Bruxelles-National
Mon 10/5
2:25 pm-1:25 pm
1 stop30h 00m
$935
St. LouisBrussels
STL Lambert-St Louis - BRU Brussels Bruxelles-National
STLBRU
Lambert-St Louis
Fri 10/16
12:10 pm-1:15 pm
2 stops18h 05m
Brussels Bruxelles-National
Fri 10/23
9:10 am-2:16 pm
2 stops36h 06m
$943
Quickest round-trip
St. LouisBrussels
STL Lambert-St Louis - BRU Brussels Bruxelles-National
STLBRU
Lambert-St Louis
Fri 10/2
12:10 pm-7:10 am
1 stop12h 00m
Brussels Bruxelles-National
Wed 10/7
6:20 am-1:25 pm
1 stop14h 05m
$966
St. LouisBrussels
STL Lambert-St Louis - BRU Brussels Bruxelles-National
STLBRU
Lambert-St Louis
Wed 10/21
12:10 pm-1:15 pm
2 stops18h 05m
Brussels Bruxelles-National
Sun 10/25
10:10 am-11:24 pm
1 stop19h 14m
$972
St. LouisBrussels
STL Lambert-St Louis - CRL Charleroi Brussels
STLCRL
Lambert-St Louis
Fri 9/25
2:40 pm-3:10 pm
2 stops17h 30m
Charleroi Brussels
Fri 10/2
9:50 am-8:20 pm
2 stops17h 30m
$1,874
Cheapest one-way
Quickest one-way
St. LouisBrussels
STL Lambert-St Louis - BRU Brussels Bruxelles-National
STLBRU
Lambert-St Louis
Sat 9/19
6:00 am-9:00 am
1 stop20h 00m
$7,971
Sorted by cheapest first
Best time to book a flight from St. Louis to Belgium
Have a flexible travel schedule? Discover the best time to fly to Belgium from St. Louis with our price prediction graph.
STL-BRU
STL-CRL
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 Belgium
STL-BE0
STL-BRU
STL-CRL
What is the cheapest month to book a flight from St. Louis to Belgium?
Currently, February is the cheapest month in which you can book a flight from St. Louis to Belgium (average of $494). Flying from St. Louis to Belgium in December is currently the most expensive (average of $2,205). 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.
Reviews of airlines servicing Belgium
Get insights into the airlines that provide service to Belgium. 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 Belgium. Reviews last updated September 2, 2026.
Read reviews from past customers who have flown United Airlines and Lufthansa from St. Louis to Belgium. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.7
Crew
8.1
Food
6.7
Entertainment
7.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Boarding
7.7
Crew
8.1
Food
6.7
Entertainment
7.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Boarding
7.7
Crew
8.1
Food
6.7
Entertainment
7.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Belgium. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for St. Louis to Belgium
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Belgium by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Belgium by cabin class
Find flights from St. Louis to Belgium, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Belgium flights
Browse other St. Louis and Belgium flight options. Last updated on September 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
St. Louis to Belgium flights
Consider these flights traveling from St. Louis to Belgium.
Top 2 airlines flying from St. Louis to Belgium
Discover the top 2 airlines that operate flights from St. Louis to Belgium. 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 7,457,451 searches. Data last updated September 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$441 | Average$1,282 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$507 | Average$1,055 | FlexibilityNo cancel fee | On-time69% |