£21 Find Cheap Flights from Ireland to Belgium

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KAYAK's insights & trends for flights to Belgium

Get data-powered insights and trends for flights to Belgium to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Belgium?

These are the best return prices found by users searching on KAYAK in the last 72 hours.

The cheapest ticket to Belgium from Ireland found in the last 72 hours was to Brussels Bruxelles-National Airport, at £55 return. The most popular route is Dublin (DUB) to Brussels Bruxelles-National Airport (BRU) and the cheapest return airline ticket found on this route in the last 72 hours was £55.

What is the cheapest month to fly from Ireland to Belgium?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ireland to Belgium, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ireland to Belgium is January, when tickets cost £54 (return) on average. On the other hand, the most expensive months are December and October, when the average cost of round-trip tickets is £107 and £100 respectively.

How far in advance should I book a flight from Ireland to Belgium?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Belgium, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on the flight from Ireland to Belgium, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Which is the cheapest airport to fly into in Belgium?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Belgium is Brussels Bruxelles-National Airport (BRU), with an average flight price of £28.


Good to know - Cheap tickets from Ireland to Belgium

Low seasonMarch
High seasonJuly
Cheapest flight£21
Best time to beat the crowds (23% less expensive on average)
Most popular time to fly and prices are also 32% lower on average.
Flight from Dublin to Brussels

FAQs for booking flights from Ireland to Belgium

  • How does KAYAK find such low prices on flights from Ireland to Belgium?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ireland to Belgium.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ireland to Belgium?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ireland to Belgium is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ireland to Belgium?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Ireland to Belgium with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ireland to Belgium?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ireland to Belgium up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to Belgium?

    Based on KAYAK data, the cheapest day to fly to Belgium is Sunday when return tickets can be as cheap as £57. On the other hand, the most expensive day to fly is Wednesday, when return prices are £128 on average.

  • What is the cheapest time of day to fly to Belgium?

    The cheapest time of day to fly to Belgium is generally in the evening, when round-trip flights cost £89 on average. Morning departures are around 22% more expensive than evening flights, on average. The most expensive time of day to fly to Belgium is generally in the morning, which is peak travel time and where the average cost of a ticket is £108.

Top airlines flying from Ireland to Belgium

 
Need help choosing which airline to fly with from Ireland to Belgium? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Aer LingusOverall score based on 1117 reviews
6.8Entertainment
7.9Crew
7.0Comfort
7.2Boarding
6.4Food
Airline reviews

I would definitely use a Linus again, the price was right, the service is excellent. No delays. Wish I had a direct flight from my hometown Detroit.

10.0 ExcellentAnonymous, Jun 2025MAN - MCO
Read more Aer Lingus reviews

I would definitely use a Linus again, the price was right, the service is excellent. No delays. Wish I had a direct flight from my hometown Detroit.

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

i used to fly aer Lingus regularly but due to price - poor seating etc i have been using other carriers - i now have aer lingus in my state and the price is always the highest - i have flown to Ireland 11 times in last 24 months and have not used Hartford because of price

Nicest staff I’ve experienced on a plane! Good food, great entertainment, and they gave out little blankets that my kids loved. All in all, great experience.

Unfortunately the flight was delayed for 50 min. Just as we were about to board so that was a drag. The boarding was average. The bag check in process was new to us and efficient. And the flight itself was smooth- basically no turbulence.

It was ok not that much because I always travel with Emirates airlines, Etihad, airlines, Qatar airlines compare to them food and comfortable was too low . Staff was good . Helpful

I believe it was short flight in plane I understand not that much compared to other airlines but weighting for checkin was too long need extra person for checkin or Atleast someone to let the customer knows don’t worry someone will be here shortly.

Noted in last review. Good to know, though air Lingus on European flights does not offer any food or drink, even though we were on the plane for 3 1/2 hours from Naples to Dublin everything you had to purchase even water.

Booked through Kayak, couldnt take flight, Kayak punted to Orbiz, Orbiz punted to Aer Lingus, Aer Lingus said sorry about your luck, try Kayak/Orbiz. Terrible customer service collecting air fares and not even offering a voucher when customers cant take flight

This flight was delayed and caused me to miss my connecting flight from New York to Boston. I had to rent a car and drive myself home to avoid waiting another 5 hours in the airport.

Flight was over an hour late. Boarding was really messy with long queues at the plane.

Straight forward checking as long as you have completed every single detail online, prior to checking day. Efficient boarding, seating is ok for a two hour flight. Fulfilledour travel requirements from Manchester to Marseille.

Cabin crew couldn’t be less interested. Cabin manager was the most arrogant and the rudest I’ve encountered in many years.

Flight got delayed and they didn’t keep us informed all the time.

Good but both flights were delayed by nearly one hour making boarding tedious. We had to wait with no information

The worst flight ever. Sitting in plane for 4 hours delay and then they change crew. No water or food offered to any passengers including children in that time. Only 2 toilets out of 3 operating for flight with 200 passengers. Only enough food available for about 7 rows of seats depending where you sat you might be lucky. Cabin crew very unfriendly.

Delayed and changed Multiple times after booking necessitating many. Travel changes ; a bit of an issue

I bought my flight, insurance etc early and paid over £200. But had i waited until closer the time the price was much cheaper, i appreciate that it could've been more expensive but it wasn't. A better discount for booking early would be better than your current one

Awful as usual the air stewardess loved her own voice and would not stop talking on coms for 2hrs please please please shut up I can’t hear my headphones and don’t want to buy juty free

Big delay on run way not much explanation why, missed a important meeting in Dublin, maybe if they did nt persist measuring everyone bag over 2 cm we would have got off on time.

Book cheap flights from Ireland to Belgium

Cheapest flights to Belgium from Ireland found in 2025

Recent return flight deals

15/7mar.
directRyanair
1h 40mDUB-BRU
22/7mar.
directRyanair
1h 40mBRU-DUB
£40
27/9sáb.
directRyanair
1h 40mDUB-BRU
1/10mié.
directRyanair
1h 40mBRU-DUB
£43
31/10vie.
direct
1h 45mDUB-BRU
3/11lun.
1 stop
23h 05mBRU-DUB
£84
7/8jue.
1 stop
9h 45mDUB-BRU
11/8lun.
direct
1h 40mBRU-DUB
£103
7/11vie.
1 stopScandinavian Airlines
9h 10mDUB-BRU
9/11dom.
1 stopScandinavian Airlines
16h 00mBRU-DUB
£127
6/11jue.
1 stopScandinavian Airlines
6h 10mDUB-BRU
9/11dom.
1 stopScandinavian Airlines
16h 00mBRU-DUB
£130
7/10mar.
1 stopLufthansa
22h 40mDUB-BRU
9/10jue.
1 stopLufthansa
13h 45mBRU-DUB
£148
28/9dom.
1 stopLufthansa
5h 50mDUB-BRU
9/10jue.
1 stopLufthansa
8h 20mBRU-DUB
£155
7/11vie.
1 stopSWISS
4h 30mDUB-BRU
9/11dom.
2 stopsSWISS
11h 25mBRU-DUB
£186
7/11vie.
2 stopsSWISS
8h 10mDUB-BRU
9/11dom.
2 stopsSWISS
11h 25mBRU-DUB
£215

Search by stops

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Recent one-way flight deals

15/8vie.
directRyanair
1h 40mDUB-BRU
£21
11/7vie.
directRyanair
1h 40mDUB-BRU
£21
26/6jue.
directRyanair
1h 30mDUB-BRU
£49
16/10jue.
1 stopScandinavian Airlines
5h 00mDUB-BRU
£62
12/8mar.
1 stopScandinavian Airlines
13h 35mDUB-BRU
£73
21/6sáb.
directRyanair
1h 40mDUB-BRU
£76
11/7vie.
1 stopKLM
12h 05mDUB-BRU
£81
14/7lun.
1 stopIberia
22h 55mDUB-BRU
£117
14/7lun.
1 stopSWISS
15h 55mDUB-BRU
£138
16/10jue.
2 stopsSWISS
8h 30mDUB-BRU
£139

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Last minute flights to Belgium

Last minute flight, train and bus deals

15/6dom.
directRyanair
1h 40mDUB-BRU
16/6lun.
directRyanair
1h 40mBRU-DUB
£78
16/6lun.
directRyanair
1h 40mDUB-BRU
19/6jue.
directRyanair
1h 40mBRU-DUB
£85
16/6lun.
multi-stopRyanair
10h 15mDUB-BRU
19/6jue.
directRyanair
1h 40mBRU-DUB
£173
16/6lun.
multi-stopLufthansa
25h 05mDUB-BRU
18/6mié.
multi-stopLufthansa
5h 25mBRU-DUB
£180
16/6lun.
multi-stopLufthansa
13h 25mDUB-BRU
17/6mar.
multi-stopLufthansa
7h 25mBRU-DUB
£183
13/6vie.
multi-stopSWISS
5h 15mDUB-BRU
15/6dom.
multi-stopSWISS
12h 30mBRU-DUB
£280
14/6sáb.
multi-stopSWISS
5h 15mDUB-BRU
16/6lun.
multi-stopSWISS
12h 30mBRU-DUB
£281
16/6lun.
multi-stop
10h 10mDUB-BRU
19/6jue.
multi-stop
5h 10mBRU-DUB
£320
13/6vie.
multi-stopAustrian Airlines
19h 55mDUB-BRU
15/7mar.
multi-stopAustrian Airlines
11h 05mBRU-DUB
£375
13/6vie.
multi-stopAustrian Airlines
9h 10mDUB-BRU
15/6dom.
multi-stopAustrian Airlines
16h 25mBRU-DUB
£407

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Everything you need to know for your flight to Belgium

Cabin class types available on flights to Belgium

Cabin classes available on flights to Belgium. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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