Cheap flights from Ireland to Brussels from £19

In general, January is the cheapest month to fly from Ireland to Brussels. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £55. If you are unable to visit Brussels during the month of January, then departing from Ireland during the month September is also very affordable. Most momondo users find prices during this month for around £57.

Our data shows that Sunday is the least expensive day to fly to Brussels. Tickets to fly out on this day can be as low as £60. On the other hand, Saturday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £98.

According to our data, the cheapest time of day to fly to Brussels is in the afternoon. momondo users have found flights departing from Ireland to Brussels in the afternoon for as low as £66. 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 £77 per ticket.

Fly from Dublin to Brussels Bruxelles-National for the best Ireland - Brussels flight prices

You are more likely to see cheaper flights to Brussels from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels for around £85 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 Ireland for as low as £62 on momondo.

There is only 1 cabin class available to choose from on Ireland to Brussels flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 14% of flights between Ireland and Brussels have experienced a delay on any given week. The average delay length over the past 12 months has been 104 minutes.

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

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

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

As of March 2026, there are 5 flights per day flying from Ireland to Brussels. The most common time of day flights depart is 06:00, with 63% of flights taking off at midday.

The number of flights available between Ireland and Brussels is 35 per week as of March 2026. The most frequent departure day is Fri, with 26% of weekly flights leaving on this day.