Cheap flights from St Louis to Brussels

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Flight deals from St Louis Airport to Brussels

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Brussels? If you want to travel next month, return fares start from $1,368. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Brussels

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

St Louis to Brussels: Flight information

The things to know before you go.
Cheapest flight found$760
Cheapest month to flyJune

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

There are 5 airports in Brussels: Brussels International, Antwerp Deurne, Brussels S. Charleroi, Liege, and Kortrijk.
The best price we found for a return flight from St Louis to Brussels is $1,087. 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. But we found flights with one or more stops from $1,087.
As of March 2026, there are no flights flying from St Louis to Brussels.
The cheapest month to fly from St Louis to Brussels is usually May.
If you're flying from St Louis Airport, the cheapest airport near Brussels is Brussels International – which is 11.0 km away from the centre of Brussels. We've found flights into this airport from $1,087.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Brussels on Wednesday, 13 May 2026.
No airlines currently offer direct flights between St Louis Airport and Brussels. 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 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.
In March, the average temperature is usually around 6°C. July is typically the warmest month in Brussels, when it usually averages around 22°C. You can expect the least rain in April. The coldest month is January, with temperatures averaging -0°C. The rainiest month is December.
Currently, Air Canada offers the cheapest flight tickets to Brussels.

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

  • Lambert-St. Louis International Airport is located in St Louis. Following the UTC+1 timezone, Brussels is six hours ahead of St Louis.

  • To avoid rushing for your STL to Brussels flight, leave enough time to check in and drop off your luggage. Arriving two hours before international departures and an hour before domestic flights is the general travel rule.

  • Delays at check-in and security are likely if you're jetting off during high season, so allow some extra wiggle room. A good rule of thumb for peak periods? Get there up to four hours early for international flights and two hours for domestic departures.

  • Consider adding a stopover to potentially find a cheaper plane ticket from STL to Brussels. All you need to do is deselect 'Direct flights only' during your search. Take a break (and maybe save some cash) by stopping at one of these connection hubs:

    • O'Hare International Airport (ORD)

    • Washington Dulles International Airport (IAD)

    • Montreal-Pierre Elliott Trudeau International Airport (YUL)

  • STL is around 16 kilometres from central St Louis. If you're driving, catching a cab or ride-sharing from the centre, it'll take you 20 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the journey time to be around 35 minutes.

  • Want a relaxed start to your trip? Stay near STL. Whether you're boarding an early flight from Lambert-St. Louis International Airport to Brussels or don't want departure day to feel hectic, these hotels are just the thing:

  • Of the departures from Lambert-St. Louis International Airport, 78.04% arrive as scheduled at their destination.

  • STL is located at 10701 Lambert International Blvd..

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

  • $760 is the cheapest price we've found for a one-way Lambert-St. Louis International Airport to Brussels flight. A return plane ticket right now is $1,087. Depending on when you want to go and the availability, these fares can change.

  • Don't leave things to the last minute. You're more likely to land cheap flights from STL to Brussels if you book in advance. Airlines often offer some fantastic early bird rates.

  • The 'Whole month' tool will show you the cheapest tickets from Lambert-St. Louis International Airport to Brussels across each month. It's an easy way to find a bargain if your trip dates aren't set in stone.

  • You don't need to check every day to see if fares have dropped when you set up a Price Alert. We'll let you know when there's an extra saving on cheap flights from STL to Brussels.

  • Find a cheap flight from Lambert-St. Louis International Airport to Brussels with the help of our filters. Select your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in Brussels

Brussels Airport (BRU)

  • Brussels Airport (BRU) to central Brussels takes around 20 minutes to reach by car. The centre is roughly 14 kilometres away.

  • Getting to the centre by public transport takes around 40 minutes.

  • If you have a late flight from Lambert-St. Louis International Airport to Brussels, nothing beats the convenience of staying close to the terminal. Grab your luggage from the carousel and then be showered and sleeping not long after at one of these hotels near BRU:

  • Grab a Brussels Airport rental car and discover Brussels and beyond with your own set of wheels. Keddy By Europcar, Alamo and Europcar are leading providers to choose from here.

  • Booking your vehicle from Brussels Airport around three weeks ahead of your flight from STL to Brussels can help you get the lowest rate.

Brussels S. Charleroi Airport (CRL)

  • Central Brussels is around 56 kilometres from Brussels S. Charleroi Airport (CRL). Once your flight from Lambert-St. Louis International Airport to Brussels has touched down and you've made your way to arrivals, the drive should take about 55 minutes.

  • If you choose to travel on public transport, you'll get to the city centre in 1 hour 35 minutes or so.

  • Hang the 'Do not disturb' sign on your door and relax at a hotel near CRL. Here are a few options where you can kick back after your STL to Brussels flight:

  • The quickest way to reach your destination is with a Brussels S. Charleroi Airport rental car. Collect your wheels from Keddy By Europcar, Thrifty or Budget and set off in the blink of an eye.

  • Snap up the best price by securing your ride from CRL two weeks ahead of time. You can also expect to have a greater range of vehicles.

Best time to go to Brussels

  • Before booking your flights from Lambert-St. Louis International Airport to Brussels, consider which time of year is best for you. Peak season in Brussels offers a bustling atmosphere and plenty of things to do, while the low season means you'll get cheaper hotel rates and fewer crowds.

  • Before locking in your Lambert-St. Louis International Airport to Brussels plane ticket, think about the weather you're most comfortable in. August is the warmest month in Brussels, with temperatures ranging from 12ºC (54ºF) to 27ºC (81ºF).

  • If you like travelling in cooler conditions, search for a cheap ticket from STL to Brussels in January when temperatures average between -2ºC (28ºF) and 8ºC (46ºF).

More about Brussels

  • When it comes to searching for somewhere to rest your head, you'll find the most popular stays in Brussels right here. Browse these options once you've booked your flight from Lambert-St. Louis International Airport to Brussels:

  • Every great holiday has to include some sightseeing. Atomium, Grand Place and Manneken Pis are must-visits when exploring Brussels.

Explore more of Belgium

  • Brussels is always a good idea, but there are so many other corners of Belgium waiting to be explored. Around 113 kilometres west of Brussels, a visit to Ostend will keep you on the move. Start with popular sights like Fort Napoleon, The Crystal Ship and Leopoldpark.

  • Verviers is another favourite destination in Belgium and is around 113 kilometres east of Brussels. No journey is complete without a visit to Quai Pierre Rapsat, Parc de Séroule and Parc de la Tourelle.

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