£46 Find Cheap Flights from London Heathrow Airport to Ireland – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Ireland departing on 25/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Heathrow to Ireland

Cheapest return prices found by our users on KAYAK in the last 72 hours
Dublin
Dublindirect£68
Cork
Corkdirect£75
Shannon
Shannondirect£73
Knock
Knockdirect£75
Milltown (Kerry)
Milltown (Kerry)1 stop£140
Dublin
Dublindirect£68
Cork
Corkdirect£75
Shannon
Shannondirect£73
Knock
Knockdirect£75
Milltown (Kerry)
Milltown (Kerry)1 stop£140

Book Cheap Heathrow to Ireland Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Ireland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Ireland

Sat, 12 Dec - Mon, 14 Dec
British Airways Logo
13:35 - 15:05
LHR
-
DUB
1h 30mdirect
British Airways Logo
10:45 - 12:20
DUB
-
LHR
1h 35mdirect
£68British Airways
Thu, 10 Sep - Sat, 12 Sep
British Airways Logo
06:20 - 07:45
LHR
-
DUB
1h 25mdirect
British Airways Logo
20:15 - 21:30
DUB
-
LHR
1h 15mdirect
£71British Airways
Sun, 30 Aug - Sun, 6 Sep
Aer Lingus Logo
14:35 - 16:05
LHR
-
SNN
1h 30mdirect
Aer Lingus Logo
21:15 - 22:40
SNN
-
LHR
1h 25mdirect
£73Aer Lingus
Tue, 18 Aug - Sat, 22 Aug
Aer Lingus Logo
22:25 - 23:50
LHR
-
ORK
1h 25mdirect
Aer Lingus Logo
20:30 - 21:45
ORK
-
LHR
1h 15mdirect
£75Aer Lingus
Sat, 29 Aug - Thu, 3 Sep
Aer Lingus Logo
11:05 - 12:35
LHR
-
NOC
1h 30mdirect
Aer Lingus Logo
13:05 - 14:30
NOC
-
LHR
1h 25mdirect
£75Aer Lingus
Fri, 4 Sep - Sat, 12 Sep
Aer Lingus Logo
14:40 - 16:10
LHR
-
SNN
1h 30mdirect
Aer Lingus Logo
16:50 - 18:20
SNN
-
LHR
1h 30mdirect
£75Aer Lingus
Thu, 10 Dec - Mon, 14 Dec
British Airways Logo
15:30 - 17:00
LHR
-
DUB
1h 30mdirect
British Airways Logo
15:10 - 16:35
DUB
-
LHR
1h 25mdirect
£75British Airways
Tue, 4 Aug - Tue, 11 Aug
Aer Lingus Logo
19:10 - 20:35
LHR
-
SNN
1h 25mdirect
Aer Lingus Logo
21:15 - 22:40
SNN
-
LHR
1h 25mdirect
£76Aer Lingus
Tue, 18 Aug - Wed, 26 Aug
Aer Lingus Logo
22:25 - 23:50
LHR
-
ORK
1h 25mdirect
Aer Lingus Logo
20:30 - 21:45
ORK
-
LHR
1h 15mdirect
£77Aer Lingus
Sat, 22 Aug - Wed, 26 Aug
Multiple Airlines Logo
20:10 - 10:15
LHR
-
KIR
14h 05m
1 stop
Multiple Airlines Logo
17:45 - 08:05
KIR
-
LHR
14h 20m
1 stop
£140Multiple Airlines
Booking Insights

KAYAK's insights & trends for Heathrow to Ireland flights

Get data-powered insights and trends into flights from Heathrow to Ireland to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest London Heathrow Airport to Ireland flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Ireland from London Heathrow Airport found in the last 5 days was to Shannon, at £104 return. The most popular route is from London Heathrow Airport (LHR) to Dublin (DUB), and the cheapest return airline ticket found on this route in the last 5 days was £105.

What is the cheapest time of day to fly to Ireland?

The average price for all round-trip flights from London Heathrow Airport to Ireland depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Ireland is generally in the evening, when retur flights cost £151 on average. Morning departures are around 223% more expensive than evening flights, on average. The most expensive time of day to fly to Ireland is generally in the morning, which is peak travel time and where the average cost of a ticket is £488.

Can I save money by flying with a stopover from London Heathrow Airport to Ireland?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of £151, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from London Heathrow Airport to Ireland?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Ireland, 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 London Heathrow Airport to Ireland is January, when tickets cost £112 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of return tickets is £158 and £151 respectively.

What’s the cheapest day of the week to fly from London Heathrow Airport to Ireland?

The average price of all round-trip flights from London Heathrow Airport to Ireland clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Ireland on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from London Heathrow Airport to Ireland. For your return ticket, we recommend flying on a Friday and avoiding Sundays for the best deals.

How far in advance should I book a flight from London Heathrow Airport to Ireland?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Ireland, 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 a flight from London Heathrow Airport to Ireland, you should book around 5 weeks before departure, which saves you about 37% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Ireland

Low season

January

Cheapest flight

£46
Best time to beat the crowds (16% less expensive on average)
Most popular time to fly (12% more expensive on average)
Flight from London Heathrow Airport to Dublin

Flights from Heathrow to Ireland: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Heathrow to Ireland 
DeborahFlew with Aer Lingus
LHR
-
DUB
Jun 2025
Heathrow seems to have a lot of plane traffic so make sure you have a good cushion of time if you have connecting flights. I had a 2 hour layover but ended up having to run to make sure I got to the other gate in time.
Verified travelerFlew with Aer Lingus
LHR
-
DUB
Jun 2025
If you’re doing a transfer speak to someone at the desk don’t use an automated kiosk
ThomasFlew with Aer Lingus
LHR
-
DUB
Oct 2024
You will likely have to walk a lot more than you might expect to make a connection.

FAQs - booking Ireland flights

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Ireland?

    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 London Heathrow Airport to Ireland.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London Heathrow Airport to Ireland 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 London Heathrow Airport to Ireland?

    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 London Heathrow Airport to Ireland 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 London Heathrow Airport to Ireland?

    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 London Heathrow Airport to Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines flying from Heathrow to Ireland

 
Need help choosing which airline to fly with from Heathrow to Ireland? 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.
7.3
Aer LingusOverall score based on 1673 reviews
6.6Food
7.0Entertainment
8.1Crew
7.2Comfort
7.4Boarding
Airline reviews

Like getting a bus. No great luxury but will get you there

8.0 ExcellentJmH, Jan 2026
LHR - ORK
Read more Aer Lingus reviews

Like getting a bus. No great luxury but will get you there

Got us to destination alive, albeit a bit late. Luggage was left behind. No live tracking app available (available on some other airlines). Supposedly going to be delivered in next couple of days.

I had zero issues with the flight. I did have issues with the staff at the airport. We missed out flight due to a delay with another airline. Talking to the staff and trying to get a new flight arranged was challenging. One guy was able to try to help us and got us on a new flight, but other staff was dismissive and clearly let us know it wasn’t their problem. All I kept thinking was… this is why air lingus has such a poor customer service reputation. I will be avoiding this airline in the future.

I liked that I went thru customs in Dublin instead of having to do that in LA.

Baggage fees are deceptive! When I booked this flight, I purchased two tickets and had indicated that I wanted one checked bag. That increased the ticket price by about $100 PER TICKET!. When we went to check in, I was told that I could only check ONE bag, even though I had purchased TWO tickets. I had to pay an additional $50 each way for my wife’s bag. In my opinion, I paid twice for her bag.

Delays resulting in missed connecting flight. Attendant failed to arrange special assistance as promised to get us on connecting flight. Robyn was the particular attendant.

This was the most expensive economy flight per minute of flight time ever. But the quality was lacking. Extremely Aer Lingus rude staff at LHR said that the flight from London to Dublin (Ireland) was “NOT international.” Horrified at the colonial and imperial perspective. Seats were dirty with trash in seat pockets. Airline doesn’t clean or care about hygiene and safety.

The ease of boarding was good. I wish they had something to eat on the plane.

Really helpful staff at the airport and the flight was comfortable with good entertainment options and food service

Boarding seemed a bit chaotic and we had to walk outside across the tarmac. Passengers of all ages had to drag carry on luggage up the outside stairway into the aircraft. There was no WiFi. Very uncomfortable crammed seats. Glad in-air time was only an hour!

Great flight just took some time to board even when lining up early for the flight, even taking off took longer then expected.

Flight was delayed by 1 hour 45 minutes. Aircraft was cramped, dirty and uncomfortable. Boarding staff more interested in charging you for oversize baggage than getting you on board. Overall not a pleasant experience.

It's not the staff's fault. The cabin crew do their best but the setup in Stansted Airport by Ryanair is poor. The herding of people like cattle is unacceptable before boarding and is something that's in every airport but only in Stansted have I seen the queueing of passengers outside the plane on the tarmac and the crew only turning up with maybe 5 minutes to depart. This is a resource issue . Yes prices are good but seemingly comes with a price of poor treatment of customers. I'll pay more next time

It was appalling, full of young people who were drunk and disobeying instructions to sit down. Crew did nothing to enforce. There was a Ryanair pilot sitting in the aisle opposite me who talked through out the safety briefing so loudly I couldn’t hear. Whole thing felt unsafe

Delayed for 2 hours lack of communication no refreshments as promised and the drinks on board were not as ordered and refused to refund

We were diverted to warsaw and there was zero information. We were just forced to disembark and off we go good luck the reat of the way. We all had to go our ways to find a way home!!!! Horrible horrible and it cost us alot of money to get a hotel and trains 4:30 pm next day.

Blood contaminated tissue was stuffed to the back of the seat in front of us.

My flight was delayed 1 hour. My Mood was not great

This time round it was very good, flight delayed by 30mins but capitan put his toe to the floor and made some time up!!

Ryanair is always shite. Slowest boarding possible in the most uncomfortable way. It’s like they are are tad sadistic.

Not good because in this cancelled and then rebooked flight BA put me and my husband in both middle seats when we were originally seated together in original flight and i was in aisle. I hate sitting in the middle. BA food needs to be better. It was just ok. Thanks though to screw and everyone one for safe flight

Crew members were thorough in checking seatbelts and whatnot which makes me feel cared for because passenger safety is a main concern.

I was sent an email that said my card payment was not verified. When I spoke to an agent , he said my card was not verified and the flight I thought I had to booked was no longer available so I booked another flight on another airline(United). Later I got flight updates , etc., concerning my supposed first flight. So if I was charged for this flight on British Airways/American airlines, I need a refund.

The crew made it a great flight. They were friendly and attentive. They made me want to fly British Airways again.

People were nice. Seats are so cramped my knees had to be pressed into the seat in front of me.

Aer Lingus was the actual airline so they handled everything professionally.

The flight was delayed, and delayed some more. But there was more room on this plane than the one that flew oversees! There was no food or entertainment, but that’s ok, it’s a short flight

Was delayed for checks after evidence of bird strike, good call

The plane was delayed. That was only downside to flight. Crew was very nice

It was truly amazing. I will do it again! Excellent!

Everything you need to know for your flight from Heathrow to Ireland

Information on your arrival and departure airports