The cheapest times to fly from STL to BRU are

  • January 1st to April 1st
  • October 1st to December 16th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from STL to BRU is early December. Prices can be as high as $1433 for Friday flights during late June, or as low as $853 for Tuesday flights around early December.


When to Fly to Brussels

Flying from St. Louis, MO (STL) to Brussels (BRU) will usually cost between $854 to $1335 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early December with an average ticket price of $888. Due to high demand the most expensive time to fly is late June, with an average price of $1353. Planning your trip to low-cost times can easily save you $465 on economy flights and even more on first-class flights. Generally, any price below $1058 can be considered a good price for a round-trip STL to BRU flight.

See below for a graph of average weekly prices for the STL to BRU route. All prices are for round-trip tickets in USD.

STL to BRU Flight Prices

Compared to other flights, the STL to BRU flight is priced close to the average and costs slightly more than the average flight leaving from St. Louis. The average price per mile (for a direct flight) is $0.15, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly to Brussels, and Saturdays are the most expensive days to return to St. Louis. Selecting flights on the least expensive days could save you up to $108 (9%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1004. Return trip prices are from the BRU to STL flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from STL to BRU can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 8 hour 54 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from STL to BRU while comparing.

Destination alternative #1: Duesseldorf Airport (DUS) in Dusseldorf

  • 102 miles (164 km) away from BRU
  • Usually 6.90% less expensive than BRU
  • 1-layover flights available

See STL to DUS flights

Destination alternative #2: Schiphol Airport (AMS) in Amsterdam

  • 98 miles (158 km) away from BRU
  • Usually 6.43% less expensive than BRU
  • 1-layover flights available

See STL to AMS flights


Flight Hacking STL to BRU

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from STL to BRU — but Champion Traveler does!

Hack #1: Boston, MA (STL > BOS > BRU)

  • Price for both tickets: $721
  • Average savings: $337 (31.85%)

See STL to BOS flights

Hack #2: New York, NY (STL > JFK > BRU)

  • Price for both tickets: $782
  • Average savings: $277 (26.13%)

See STL to JFK flights

Hack #3: Newark, NJ (STL > EWR > BRU)

  • Price for both tickets: $809
  • Average savings: $249 (23.53%)

See STL to EWR flights


Flight Questions Answered

Still have questions about flying from STL to BRU? We’ve got answers.

Which airlines fly this route?

You can find 21 major airlines flying this route most often: Aer Lingus, Air Canada, Air France, Alaska, Alitalia, American, Austrian, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, LOT, Lufthansa, SAS, SWISS, Tap Air Portugal, Turkish Airlines, United, and potentially more during busy seasons.

How far away is it from Brussels National Airport to St Louis Lambert International Airport?

The distance between the two airports is roughly 4396 miles or 7075 kilometers.

How long does it take to fly from STL to BRU?

The real-world flight time for a nonstop STL to BRU flight is about 8 hour 54 minutes.

How many flights go between St. Louis, MO and Brussels?

It depends on the day of the week and the date, but a typical day might have around 81 available flights from STL to BRU.


Airport Location Info


Departing Airport

Origination code STL
Origination airport name St Louis Lambert International Airport
City St. Louis, MO
Country the United States
Latitude 38.7
Longitude -90.4

Return Airport

Destination code BRU
Destination airport name Brussels National Airport
City Brussels
Country Belgium
Latitude 50.9
Longitude 4.5


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.