Cheap flights from London Heathrow Airport to Brussels from £51

In general, December is the cheapest month to fly from London Heathrow Airport to Brussels. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £69. If you are unable to visit Brussels during the month of December, then departing from London Heathrow Airport during the month June is also very affordable. Most momondo users find prices during this month for around £70.

Our data shows that Friday is the least expensive day to fly to Brussels. Tickets to fly out on this day can be as low as £432. On the other hand, Tuesday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £487.

According to our data, the cheapest time of day to fly to Brussels is in the evening. momondo users have found flights departing from London Heathrow Airport to Brussels in the evening for as low as £116. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Brussels, so prices are often more expensive at around £489 per ticket.

Fly from London Heathrow to Brussels Bruxelles-National for the best London Heathrow - Brussels flight prices

You are more likely to see cheaper flights to Brussels from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels for around £129 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels from London Heathrow Airport for as low as £102 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to Brussels flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

British Airways and Brussels Airlines are the most popular carriers operating from London Heathrow to Brussels

Brussels Airlines, British Airways and KLM are the top three most popular airlines that fly to Brussels from London Heathrow Airport according to our data. Brussels Airlines is the first choice among our users, with 54% of people opting to fly with this airline when travelling to Brussels. Keep in mind that there are 3 different airlines that fly to Brussels on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% of flights between London and Brussels have experienced a delay on any given week. The average delay length over the past 12 months has been 96 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 16% of their flights experiencing any sort of delay.

The number of flights available between London Heathrow Airport and Brussels is 12 per day as of June 2026. The most frequent departure time is 11:00, with 67% of daily flights leaving at midday.

The number of flights available between London Heathrow Airport and Brussels is 89 per week as of June 2026. The most frequent departure day is Sun, with 25% of weekly flights leaving on this day.