The cheapest times to fly from CRL to STL are

  • March 5th to August 5th (except the week of March 12th)

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 CRL to STL is mid April. Prices can be as high as $7024 for Sunday flights during early to mid October, or as low as $4101 for Thursday flights around mid April.


When to Fly to St. Louis

Flying from Charleroi (CRL) to St. Louis, MO (STL) will usually cost between $4336 to $6809 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid April with an average ticket price of $4343. Due to high demand the most expensive time to fly is early to mid October, with an average price of $6743. Planning your trip to low-cost times can easily save you $2400 on economy flights and even more on first-class flights. Generally, any price below $4653 can be considered a good price for a round-trip CRL to STL flight.

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

CRL to STL Flight Prices

Compared to other flights, the CRL to STL flight is more expensive than the average and costs more than the average flight leaving from Brussels. The average price per mile (for a direct flight) is $0.66, which is above average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to STL, and Wednesday the cheapest day to fly back into CRL. Sundays are the most expensive days to fly to St. Louis, and Tuesdays are the most expensive days to return to Brussels. Selecting flights on the least expensive days could save you up to $2096 (32%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $4673. Return trip prices are from the STL to CRL 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 CRL to STL can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 8 hour 55 minutes may be realistic.


Flight Hacking CRL to STL

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 CRL to STL — but Champion Traveler does!

Hack #1: Manchester (CRL > MAN > STL)

  • Price for both tickets: $787
  • Average savings: $3867 (83.1%)

See CRL to DUB flights

Hack #2: Dublin (CRL > DUB > STL)

  • Price for both tickets: $805
  • Average savings: $3848 (82.7%)

See CRL to MAN flights

Hack #3: Budapest (CRL > BUD > STL)

  • Price for both tickets: $807
  • Average savings: $3847 (82.67%)

See CRL to BUD flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 10 major airlines flying this route most often: Aeromexico, Air Canada, Alaska, Delta, Emirates, Korean Air, Qantas, Singapore Airlines, United, WestJet, and potentially more during busy seasons.

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

The distance between the two airports is roughly 4410 miles or 7097 kilometers.

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

The real-world flight time for a nonstop CRL to STL flight is about 8 hour 55 minutes.

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

It depends on the day of the week and the date, but a typical day might have around 11 available flights from CRL to STL.


Airport Location Info


Departing Airport

Origination code CRL
Origination airport name Brussels South Airport
City Charleroi
Country Belgium
Latitude 50.5
Longitude 4.5

Return Airport

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


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.