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Cheap flights from Ireland to Brussels from £21

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/11. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — BRU
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Ireland to Brussels

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to Brussels
Explore the most affordable flight options available from Ireland to Brussels. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 November 2025.

Mon 8/1206:20DUB - BRU
Nonstop1h 45mRyanair
Mon 9/309:40BRU - DUB
Nonstop1h 45mRyanair
Deal found 6/11£54
Thu 20/1106:05DUB - BRU
Nonstop1h 45mRyanair
Mon 24/1109:40BRU - DUB
Nonstop1h 45mRyanair
Deal found 7/11£57
Mon 22/1206:20DUB - BRU
Nonstop1h 45mRyanair
Mon 29/1217:25BRU - DUB
Nonstop1h 45mRyanair
Deal found 7/11£68
Mon 1/1206:20DUB - BRU
Nonstop1h 45mMultiple Airlines
Wed 3/1217:10BRU - DUB
1 stop7h 40mMultiple Airlines
Deal found 6/11£88
Sat 20/1205:45DUB - BRU
Nonstop1h 45mRyanair
Sat 27/1209:05BRU - DUB
Nonstop1h 45mRyanair
Deal found 5/11£102
Mon 8/1217:15DUB - BRU
1 stop4h 05mMultiple Airlines
Mon 9/309:40BRU - DUB
Nonstop1h 45mMultiple Airlines
Deal found 6/11£106
Mon 22/1207:30DUB - BRU
Nonstop1h 45mMultiple Airlines
Mon 29/1220:30BRU - DUB
1 stop16h 15mMultiple Airlines
Deal found 7/11£137
Mon 8/1217:15DUB - BRU
1 stop4h 05mKLM
Mon 9/310:45BRU - DUB
1 stop6h 35mKLM
Deal found 6/11£144
Sat 20/1217:15DUB - BRU
1 stop4h 05mMultiple Airlines
Sat 27/1209:05BRU - DUB
Nonstop1h 45mMultiple Airlines
Deal found 5/11£151
Fri 21/1111:30DUB - BRU
1 stop6h 10mScandinavian Airlines
Mon 24/1111:15BRU - DUB
1 stop9h 20mScandinavian Airlines
Deal found 6/11£155

Cheap flight deals from Ireland to Brussels

Keep the following information in mind while searching for Ireland to Brussels flight deals. Data was last updated 7 November 2025.

Round-trip from

£54

One-way from

£21

Popular in

December

Cheapest in

January

Average price

£106
Ryanair
  • Ryanair
  • 8/12-9/3
  • Nonstop
  • 3h 30m total
  • Ireland to Brussels
Search Deals
Ryanair
  • Ryanair
  • 16/11
  • Nonstop
  • 1h 45m total
  • Ireland to Brussels
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£6 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to Brussels that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 November 2025.
Use the filters below to find and compare flights from Ireland to Brussels that are best for you.

Fly from

Ireland

Fly to

Brussels

Route

Depart

Return

Price

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Thu 20/11

06:05-08:50

Nonstop1h 45m

Brussels Bruxelles-National

Mon 24/11

09:40-10:25

Nonstop1h 45m

£57

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Mon 22/12

06:20-09:05

Nonstop1h 45m

Brussels Bruxelles-National

Mon 29/12

17:25-18:10

Nonstop1h 45m

£68

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Mon 8/12

17:15-22:20

1 stop4h 05m

Brussels Bruxelles-National

Mon 9/3

09:40-10:25

Nonstop1h 45m

£106

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Mon 1/12

19:15-07:55

1 stop11h 40m

Brussels Bruxelles-National

Wed 3/12

15:10-23:50

1 stop9h 40m

£147

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Thu 12/2

17:15-22:20

1 stop4h 05m

Brussels Bruxelles-National

Tue 17/2

08:05-12:40

1 stop5h 35m

£149

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Fri 21/11

11:30-18:40

1 stop6h 10m

Brussels Bruxelles-National

Mon 24/11

11:15-19:35

1 stop9h 20m

£155

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Fri 6/2

19:05-14:30

1 stop18h 25m

Brussels Bruxelles-National

Sun 8/2

20:30-11:45

1 stop16h 15m

£156

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Wed 26/11

17:15-22:20

1 stop4h 05m

Brussels Bruxelles-National

Wed 3/12

10:45-16:20

1 stop6h 35m

£156

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Fri 20/3

19:05-09:40

1 stop13h 35m

Brussels Bruxelles-National

Sun 22/3

10:20-18:20

1 stop9h 00m

£156

DublinBrussels

DUB - BRU

DUBBRU

Dublin

Fri 5/12

18:35-08:50

1 stop13h 15m

Brussels Bruxelles-National

Sun 7/12

15:20-12:30

1 stop22h 10m

£162

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 20 results
1
2

Best time to book a flight from Ireland to Brussels

Have a flexible travel schedule? Discover the best time to fly to Brussels from Ireland with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ireland to Brussels

What is the cheapest month to book a flight from Ireland to Brussels?

Currently, October is the cheapest month in which you can book a flight from Ireland to Brussels (average of £15). Flying from Ireland to Brussels in December is currently the most expensive (average of £51). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IE to BRU?

Find hourly flight availability from Ireland to Brussels. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 November 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 62% on flights from Ireland to Brussels by exploring options for tickets in the evening.

Weekly flight availability from Ireland to Brussels

Explore weekly flight availability from Ireland to Brussels. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 7 November 2025.

The most flights from IE0 to BR1 are scheduled on a Friday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing Brussels

Get insights into the airlines that provide service to Brussels. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Brussels. Reviews last updated 7 November 2025.
Check out reviews from past customers who have flown with Aer Lingus and Ryanair from Ireland to Brussels to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Food

6.6

Entertainment

6.9

Crew

8.0

Comfort

7.1

Boarding

7.4

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight from Dublin to Washington (Flight EI 119 on October 25, 2025) one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.
Aer Lingus
7.2
Good
1,365 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Food

6.6

Entertainment

6.9

Crew

8.0

Comfort

7.1

Boarding

7.4

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight from Dublin to Washington (Flight EI 119 on October 25, 2025) one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.
Ryanair
6.8
Okay
5,188 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Food

6.6

Entertainment

6.9

Crew

8.0

Comfort

7.1

Boarding

7.4

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight from Dublin to Washington (Flight EI 119 on October 25, 2025) one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Brussels. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ireland to Brussels?

    Ryanair and KLM can get you from Ireland to Brussels in just under 1h 45m. Your travel time can differ by up to 2h 20m. There are 486 mi between Ireland and Brussels. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Ireland to Brussels one-way?

    £21 is the cheapest one-way deal found within the past few days, from Ryanair. You may also be able to find cheap deals on Aer Lingus and KLM, with prices starting from £37 and £67, respectively.

  • What are the most reliable airlines from Ireland to Brussels?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ireland to Brussels on time: Buzz (100%), JetBlue (86%), Qatar Airways (86%).

  • What are the cheapest flights from Ireland to Brussels?

    The cheapest flight price from Ireland to Brussels is £23. On average you can expect to pay £65. The most popular route, (Dublin - Brussels Bruxelles-National), can usually be booked for £112.

  • Can I find deals for flights from Ireland to Brussels that include hotel bookings?

    Yes. In addition to deals on Ireland to Brussels flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ireland to Brussels?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Brussels.

  • Can I find deals for business class flights from Ireland to Brussels?

    Yes. Cheapflights offers flight deals from Ireland to Brussels by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to Brussels?

    Currently, October is the cheapest month in which you can book a flight from Ireland to Brussels (average of £15). Flying from Ireland to Brussels in December is currently the most expensive (average of £51). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ireland to Brussels

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Ireland to Brussels

Discover the top 2 airlines that operate flights from Ireland to Brussels. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£29Average£69FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£48Average£73FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ireland to Brussels?

Deals for Ireland to Brussels flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Ireland to Brussels?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ireland to Brussels.

Can Cheapflights find flights from Ireland to Brussels with no change fees?

Certainly. Search results for flights to Brussels from Ireland shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Ireland to Brussels become cheaper?

Yes! Start tracking prices for Ireland to Brussels flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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