Cheap flights from Ireland to Brussels from €16

The month of January is, on average, the cheapest month to fly to Brussels from Ireland, with most prices found around €62. 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 €66.

On average, the least expensive day to fly to Brussels from Ireland is on a Thursday. momondo users have found tickets for Thursday departures for as low as €101. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Brussels on Monday is €213.

In the afternoon is the cheapest time of day to fly from Ireland to Brussels when you can find flight prices for as low as €117. Flying to Brussels in the afternoon is an ideal time because this is during off-peak travel hours. Flights at midday are often more expensive, with an average ticket price of €162.

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 €93 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 €71 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 9% of their flights experiencing any sort of delay.

The number of flights available between Ireland and Brussels is 7 per day as of March 2026. The most frequent departure time is 06:00, with 63% of daily flights leaving at midday.

As of March 2026, there are 52 flights per week flying from Ireland to Brussels. The most common day of the week flights depart is Fri, with 23% of flights taking off on this day.