Question 1

What is the cheapest month to fly to Brussels?

Accepted Answer

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

Question 2

How many flights depart from Ireland to Brussels on average per day?

Accepted Answer

The number of flights available between Ireland and Brussels is 5 per day as of January 2026. The most frequent departure time is 06:00, with 63% of daily flights leaving at midday.

Question 3

How far in advance should I book a flight to Brussels?

Accepted Answer

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 €90 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 €70 on momondo.

Question 4

What is the most punctual flight time for Ireland to Brussels flights?

Accepted Answer

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.

Question 5

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Wednesday 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.

Question 6

How long does it take to fly to Brussels?

Accepted Answer

If you’re flying from a popular airport in Ireland, such as Cork or Dublin, and flying into Brussels, then you can expect flight times to average 1h 40m and 1h 40m, respectively.

Question 7

What is the cheapest airline that flies from Ireland to Brussels?

Accepted Answer

Ryanair is the most popular carrier operating from Ireland to Brussels

Question 8

What is the cheapest day to depart on your flight to Brussels?

Accepted Answer

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 €97. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Brussels on Sunday is €151.

Question 9

What is the cheapest time of day to depart on your flight to Brussels?

Accepted Answer

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 €115. 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 €163.

Question 10

What is the cheapest Ireland to Brussels flight route?

Accepted Answer

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

Question 11

How often are flights from Ireland to Brussels delayed?

Accepted Answer

Historically, on average around 15% 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.

Question 12

How many flights depart from Ireland to Brussels on average per week?

Accepted Answer

As of January 2026, there are 36 flights per week flying from Ireland to Brussels. The most common day of the week flights depart is Wed, with 19% of flights taking off on this day.

Question 13

What cabin class options are available on Ireland to Brussels flights?

Accepted Answer

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.

Question 14

Which airline has the best punctuality record on Ireland to Brussels flights?

Accepted Answer

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.

Question 15

When did momondo last update prices for flights from Ireland to Brussels?

Accepted Answer

Prices for flights from Ireland to Brussels are refreshed on a daily basis.

Question 16

How many operators does momondo search for flights from Ireland to Brussels?

Accepted Answer

As of January 2026, there are 2 operators available to choose from for flights from Ireland to Brussels.

Question 17

How old do you have to be to fly from Ireland to Brussels?

Accepted Answer

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ireland to Brussels.

Question 18

What documentation or ID do you need to fly to Brussels?

Accepted Answer

The travel and health documents you'll need for your trip to Brussels may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Brussels. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Fastest flight time	1h 40m
Direct flights	Every day
Airports in Brussels	2 airports

Airline	Rating	Free Cancellation	Price
Ryanair	PriceFrom €46	Free Cancellation	Rating 6.9 5,243 reviews		Search Ryanair flights
Aer Lingus	PriceFrom €62	Free Cancellation	Rating 7.2 1,435 reviews		Search Aer Lingus flights

Cheap flights from Ireland to Brussels from €15

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to Brussels departing on 27/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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See travel insights to Brussels from

How to get the cheapest flight ticket from Ireland to Brussels

What is the cheapest month to fly to Brussels?

What is the cheapest day to depart on your flight to Brussels?

What is the cheapest time of day to depart on your flight to Brussels?

What is the cheapest Ireland to Brussels flight route?

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

How far in advance should I book a flight to Brussels?

What cabin class options are available on Ireland to Brussels flights?

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.

What is the cheapest airline that flies from Ireland to Brussels?

Ryanair is the most popular carrier operating from Ireland to Brussels

How often are flights from Ireland to Brussels delayed?

Historically, on average around 15% 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.

What is the most punctual flight time for Ireland to Brussels flights?

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.

What day of the week experiences the fewest flight delays on this route?

Wednesday 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.

Which airline has the best punctuality record on Ireland to Brussels flights?

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.

How many flights depart from Ireland to Brussels on average per day?

The number of flights available between Ireland and Brussels is 5 per day as of January 2026. The most frequent departure time is 06:00, with 63% of daily flights leaving at midday.

How many flights depart from Ireland to Brussels on average per week?

As of January 2026, there are 36 flights per week flying from Ireland to Brussels. The most common day of the week flights depart is Wed, with 19% of flights taking off on this day.

How long does it take to fly to Brussels?

If you’re flying from a popular airport in Ireland, such as Cork or Dublin, and flying into Brussels, then you can expect flight times to average 1h 40m and 1h 40m, respectively.

Cheap Ireland to Brussels flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ireland to Brussels

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When did momondo last update prices for flights from Ireland to Brussels?

How many operators does momondo search for flights from Ireland to Brussels?

How old do you have to be to fly from Ireland to Brussels?

What documentation or ID do you need to fly to Brussels?

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Airports listed have a maximum distance of 44.1 km from Brussels