Cheap Flights from St Louis (STL) to Brussels International (BRU)

Compare St Louis to Brussels International flight deals

Find the cheapest month or even day of the year to fly to Brussels International

Book the best Brussels International fare with no extra fees

Flight deals from St Louis to Brussels International

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Brussels International Airport? If you want to travel next month, return fares start from £632. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Brussels International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Brussels International flights are currently cheapest in August.

St Louis to Brussels: Flight information

The things to know before you go.
Cheapest flight found£365
Cheapest month to flyAugust

Finding cheap flights from St Louis to Brussels International: Frequently asked questions

The best price we found for a return flight from St Louis to Brussels International is £632. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Brussels International. But we found flights with one or more stops from £632.
As of April 2026, there are no flights flying from St Louis to Brussels International.
The cheapest month to fly from St Louis to Brussels International is usually May.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Brussels International Airport on Friday, 8 May 2026.
No airlines currently offer direct flights between St Louis Airport and Brussels International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Brussels International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Brussels is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Air Canada offers the cheapest flight tickets to Brussels International.

Travelling from Lambert-St. Louis International Airport (STL) to Brussels Airport (BRU): what you need to know

  • The timezone in Brussels is UTC+1, which is six hours ahead of St Louis.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This way, you can comfortably catch your STL to BRU flight.

  • During popular months like July, it's a good idea to get to the airport well in advance. Plan to arrive two hours before domestic departures and four hours ahead for international flights when you fly during a high season in general.

  • If you'd like to split up your journey, just deselect 'Direct flights only' when searching for your ticket from Lambert-St. Louis International Airport to Brussels Airport. Here are the most popular stopovers between STL and BRU:

    • O'Hare International Airport

    • Washington Dulles International Airport

    • Montreal-Pierre Elliott Trudeau International Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Brussels Airport (BRU)

  • £365 is the lowest price for a one-way Lambert-St. Louis International Airport to Brussels Airport flight. Return flights start from £632. These prices can change depending on availability.

  • To pick up cheap tickets from STL to BRU, book as early as you can. Airlines usually offer their most competitively priced fares when flights are first made available.

  • The 'Whole month' search function shows you the cheapest flights from Lambert-St. Louis International Airport to Brussels Airport across the entire month. It's a good way to snap up a bargain if your plans are flexible.

  • Never miss a deal on cheap flights from STL to BRU by setting up a Price Alert. You'll get an email or notification on the app when a special offer becomes available.

  • Discover the right flight for you with the help of the filters. To see the 'Cheapest,' 'Best' or 'Fastest' flights from Lambert-St. Louis International Airport to Brussels Airport, use the 'Sort by' function. You can also filter by airline, arrival and departure times, and number of stops.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Brussels Airport (BRU)

Getting from Brussels Airport (BRU) to central Brussels

  • Brussels Airport to central Brussels has a drive time of around 20 minutes. It's approximately 9 miles away.

  • It takes roughly 40 minutes if you're travelling on public transport.

When to fly to Brussels Airport (BRU)

  • July is the most popular month for flights from Lambert-St. Louis International Airport to Brussels Airport. To escape the crowds, go to Brussels in January.

  • The warmest month in Brussels is August, with the temperature ranging between 12ºC (54ºF) and 27ºC (81ºF). Book your flights from Lambert-St. Louis International Airport to Brussels Airport in this month if you like this kind of weather.

  • January has average temperatures of between -2ºC (28ºF) and 8ºC (46ºF). Search for cheap tickets from STL to BRU around that time if you like travelling in cooler conditions.

Explore more of Belgium

  • Charleroi is just one of the many places in Belgium waiting to be explored once you've taken in the sights of Brussels. Around 30 miles away to the south, its top attractions include Parc Gobbe, Maison Dermine (art déco — 1921) and Parc Ligny.

  • If you're eager to discover another well-known destination in Belgium, head for Liege, roughly 55 miles east of Brussels. Gare de Liege-Guillemins, Curtius Museum and Montagne de Bueren are key reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.