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Find cheap flights from London Heathrow Airport to Ireland from £39

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 27/8. 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
0 bags
Sat 15/6
Sat 22/6

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Best Ireland Flight Deals

Cheapest return prices found by our users on KAYAK in the last 72 hours

Dublin
Dublindirect£53
Cork
Corkdirect£93
Shannon
Shannondirect£142
Knock
Knockdirect£90
Donegal
Donegal1 stop£309

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

Low season

January

High season

August

Cheapest flight

£39
Best time to beat the crowds (31% less expensive on average)
Most popular time to fly and prices are also 0% lower on average.
Flight from London Heathrow Airport to Dublin

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

See more FAQs

Top tips for finding a cheap flight from London Heathrow Airport to Ireland

  • Morning departure is around 164% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving 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.
7.8
KLMOverall score based on 1568 reviews
8.4Crew
7.2Entertainment
7.3Food
7.6Comfort
7.8Boarding
Airline reviews

Seats are fair enough for medium tall people. Good food all the trip. Fight attendances are warm

10.0 ExcellentCesar, Feb 2024DUS - AMS
Read more about KLM reviews

Seats are fair enough for medium tall people. Good food all the trip. Fight attendances are warm

no issues at all... Kudos to the food. This time was really really good

The food was ok. The crew seemed like they were cranky. I had one guy get mad at me for passing in between the storage area to get to the other toilet. I can understand if it's not allowed but reprimanding me like I'm a student saying "This is the last time!" was not appropriate. During my meal time, there was a French family around me. No problems there but when we usually have meals, they are supposed to put their chair in the upright position. These people did not do it and the steward did not tell them to raise their seat in the upright position. However, I was told to do so! So, me and another person next to me had to eat with the monitor almost touching our faces. Furthermore, a lady in front of me was putting her feet up and preventing another elder passenger from putting her seat back. To make it worse, she was continuously hitting her back into her seat, shaking my monitor while I was watching a movie. A crew member did speak to her about it but then she accused me of pushing her seat forward! The crew member gave me a death stare and told me to stop pushing the seat forward. I did not even touch her seat at all, if I did, she would know it. Her boyfriend also stood up and tried to push her seat even further past the maximum decline to no avail. None of these people were reprimanded but the steward, some bald guy, was extremely friendly with them and did not even try to instruct them to do anything until it was time to land. I resisted the urge to really argue with them because I would have obviously been seen as the aggressor (I have no idea why). I hardly said anything on this flight except "more wine please" and "sorry" if I bumped into someone accidentally. Overall, it was an annoying flight and I had to resist the urge to yell at the steward and the people he was overly friendly with. The happiest moment of this flight was leaving it.

One of the vstewardeses wanted to bump me of the plane for absolutely nothing. There is CCTV in the plane ans everything can be verified. Very disappointing , you all will see, o other 5 years and the passangers who does not smile to flight attendent will be bumped off...

The worst airline. Cancelled flight 30 min before boarding and rebooked on flight after 3 days.

I travel frequently. The flight was late again... KLM should really try and be on time

The flight itself it was great nice food the crew were very nice and helpful, Checking in from Birmingham wasn't great long queues for bag dropped, And I had my hand luggage case taken away from me even though I requested to have it with me as I had breakables items. I was told I can not because of the length of the flight with no explanation at all no options was given for me to take my fragile items out of my case it was taken away with hold buggage I find the staff member who was checking me in very unpleasant !! Can we please be advise if the rules have changed about the the carry on hand luggage it will be easier to be advise on booking your tickect if we not allowed to take the hand luggage with me. Overall I had a good flight .

The plane was clean and the staff was friendly. Food and drinks as expected on international flights. The entertainment system was old style, with a pullout controller, and selections not as extensive as on other flights.

The food quality is poor. The staff are very friendly and accommodating. The entertainment program was limited. I experienced a delay of 30 minutes due to two issues. Passenger luggage had to be removed and there was a technical issue with the stairs not detaching from the aircraft. The pilot managed to compensate and we arrived only 15 minutes later. The luggage at Dubai airport was very slow. I waited over an hour.

I requested wheel chair assistance , it was confirmed via email that inwoood get it but I didn’t get it . The last leg of my trip to Nigeria was the worst.

Carry on luggage size for economy passengers significantly smaller than other airlines, so nearly all ecomy passengers had their bags taken and checked.

Didn’t get my luggage from layover in Zurich until 3 days later even though my luggage was marked priority and short layover, but my husband got his when we landed

seats are too tight and uncomfortable everything else went well.

Flight was late and crew were unwilling to help with information on connections. Call light had been on for 61 minutes without tesponse.

Horrible experience. They "GAME" with seats they decided to play where you can`t select or get seat during check-in without paying and then forcing you to stay long line at the Customer Service at the gate to get a boarding ticket with seat assigned is pathetic. Will never fly with United again!

SO disappointing. I spent so much money on this ticket, for them to cancel and not be able to rebook me in time. They were very unhelpful, and condescending throughout the whole Swiss airport. Will not be flying again.

The Zurich airport is a disaster with to small trains running between the terminals, the trains was overfilled (not good in Corona times). It was no directions in the airport with proper lines so you did not know if you ere standing in the right line. They checked your passport 3 times in the airport = a lot of standing in line. Service on the plane could be a lot better, The cabin crew could have offer more to drink (water, coffee, tea), the food sucked.

Swiss ground crew was again at its prime and although I’m United 1K (Star Alliance Gold) they created problems with my hand luggage - while other passengers were boarding with more handbags and larger hand luggages, were critical on my 2 young kids attending the lounge with me and boarding the plane with me on the priority lane.

Everything was on time and efficient - expected from a Swiss crew. But the entertainment system was pretty bad - the display was old. Food was pretty bad and a couple of times they started serving drinks and then just skipped past my row (and likely several others)

I was pleasantly surprised with the whole experience. Thank you

Are Longus was fine. I booked thru Kayak and was unable to get my business class seat early. Sat next to galley. Crew forgot to wake me for breakfast.

I was pleasantly surprised - it has been awhile since I traveled with them - other than being delayed leaving Malaga everything ran very smoothly- yes I would travel with aer Lingus again and yes I would recommended

I loved how they arrange boarding (starting with people seated in back and moving to the front). Flight crew was very polite and welcoming. Seating was ok, I felt like there was enough leg space however it is noticeable when the passenger in front of you sets their seat back.

Flight staff very friendly and helpful where possible. Late flight and travelling with young child, cabin lights remained on for the duration of the flight which was a little disappointing considering the time of the flight. Overall very happy to travel with Aer Lingus.

Nice to be on a flight that wasn't fully booked so there were only two of us in the three seat row.

The only problem was there are games on the entertaiment system. The guy behind me played poker the entire time and poking the back of my seat. I hope they remove these.

Delayed due to weather... fine. But then the board us. Rows 15 and back had to go down the stairs and back up the back stair entrance to the plane. No assistance offered. Then they inform us that we are delayed for paperwork for an hour. So why did we board? Then, about 45min later they inform us that it'll be another 60-90mins. Really? No wifi, no seat entertainment, no drink or snacks offered. And we were not allowed to deboard.

Great travel. Wonderful experience. Hope to do it again in the near future. God willing

Aer Lingus doesn't have plug ins for devices at each seat. They also did not give me a dairy free meal as requested and confirmed by staff. It was as if I had not requested anything. Otherwise, they were great!

There were a lot of empty rows. As a single passenger I should not have been seated with 2 others. The WiFi didn’t work. The Kosher meal was awful.

Very good, everything went straight forward, boarding, during the flight, landing and all on time Well done

flight delayed, no information given until late on, Ryanair app said "on time" until 5 minutes before expected departure time, crew rushed us to board, when it was already 3 hours late

I got denied boarding bevause they said they "ran out of seats on a plane"

Speakers were blaring. It's like being in a Moroccan market and you keep getting shouted at with what's for sale

We missed the flight due to very slow security control and lack of last call announcement. We only found out at the gate that the gate is closed. Altogether 14 or 15 people missed the flight FR4500 from Cologne to Dublin.

Everything went according to plan. Check in, boarding etc all were very efficient.

What can you say Ryanair get you there,no frills Not so cheap anymore ..... but what is now days! Would use again as always. Good flight times for us.

Very unpleasant staff, disgusting service, ignoring requests, refusal to help

Late again rude staff at gate bullying passengers made us stand in the cold 3degrees for 40 mins before they let us board

The usual average Ryanair flight, but we landed 20 min before due time, which was very good.

Boarding good. Seats uncomfortable when lie flat. Food was awful. Tasted stale and chicken was dry. No live tv or flight map. Had to pay for internet.

Poor technical details on this plane. 1) There was no WiFi on an 8 hour long-haul flight. So no work could be done. That's below the standard expected for airlines these days. 2) The power outlet at my seat was busted and not working. 3) The headphone jack was loose and I had to keep adjusting my headphones to get good reception, or when it slipped out. - The flight was delayed to due mechanics. Sometimes this can't be avoided, I understand, and it's a big inconvenience to arrive that much later when traveling across time zones (then arriving at 4am from the prior time zone). - Also unique to this flight, the northern lights were visible on the right side of the aircraft, but I only found out after we landed (b/c again no wifi). I understand there are considerations about people being out of their seats to look, but I feel extremely disappointed and resentful that I wasn't told so that I could have a chance to look at this probably once-in-a-lifetime cosmic event from a view in the sky. - Flight crew was otherwise friendly and helpful.

Our flight was delayed by over 6 hours. We then had to deplane, stay overnight in a hotel then fly out the next day, 23 hours late.

I would have preferred something lighter for the second meal. Maybe a small sandwich .

They cancelled our flight the morning of departure at 4:30am.

We were told to check our bags at the last minute, and the communication was poor.

Lost our luggage in Heathrow. Showed up 3 days into a 7 day vacation. Very inconvenient and disappointing!!

My luggage never arrived to Zurich. They can't confirm when it will arrive

Late again. 3 out of 4 late. One cancelled flight and one lost bag.

Charged an extra 65 pounds for overweight suitcase, Not told how much overweight but had no choice but to pay the price. Compare to Delta Airlines where I flew internationally a few days before with this suitcase and no extra charge by Delta. Comfort was horrible. I am just under 6 feet tall, and good that the flight was only 1 1/2 hours, because my knees were in the seat back in front of me the whole flight. I felt that my knees were part way up to my chest. No reason to have the seats that close. I will say to the positive was the flight crew, very friendly and efficient.

Book cheap flights from London to Ireland

Cheapest flights to Ireland from London found in 2024

Recent return flight deals

14/9Sat
directBritish Airways
1h 25mLHR-DUB
18/9Wed
directBritish Airways
1h 30mDUB-LHR
£58
15/10Tue
directBritish Airways
1h 25mLHR-DUB
17/10Thu
directBritish Airways
1h 20mDUB-LHR
£59
11/6Tue
directAer Lingus
1h 30mLHR-NOC
25/6Tue
directAer Lingus
1h 25mNOC-LHR
£90
15/6Sat
directAer Lingus
1h 20mLHR-ORK
22/6Sat
directAer Lingus
1h 15mORK-LHR
£93
4/6Tue
direct
1h 20mLHR-DUB
6/6Thu
direct
1h 30mDUB-LHR
£100
15/6Sat
direct
1h 20mLHR-DUB
22/6Sat
direct
1h 20mDUB-LHR
£105
12/6Wed
1 stopKLM
5h 15mLHR-DUB
19/6Wed
1 stopKLM
5h 05mDUB-LHR
£149
4/6Tue
1 stopKLM
4h 55mLHR-DUB
12/6Wed
1 stopKLM
4h 50mDUB-LHR
£156
24/6Mon
1 stopSWISS
16h 05mLHR-DUB
1/7Mon
1 stopSWISS
22h 40mDUB-LHR
£161
14/6Fri
1 stopSWISS
13h 15mLHR-DUB
16/6Sun
1 stopSWISS
22h 40mDUB-LHR
£162

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Recent one-way flight deals

27/8Tue
directBritish Airways
1h 25mLHR-DUB
£39
14/9Sat
directBritish Airways
1h 25mLHR-DUB
£40
1/6Sat
directBritish Airways
1h 25mLHR-DUB
£40
4/6Tue
directAer Lingus
1h 20mLHR-ORK
£47
4/6Tue
directAer Lingus
1h 20mLHR-ORK
£47
15/9Sun
1 stopKLM
8h 45mLHR-ORK
£89
11/11Mon
1 stopKLM
4h 00mLHR-DUB
£90
17/9Tue
1 stopSWISS
5h 55mLHR-DUB
£101
25/8Sun
1 stopScandinavian Airlines
6h 10mLHR-DUB
£113
14/6Fri
1 stopSWISS
11h 50mLHR-DUB
£123

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Last minute flights from Heathrow to Ireland

Last minute flight, train and bus deals

18/5Sat
directBritish Airways
1h 25mLHR-DUB
22/5Wed
directBritish Airways
1h 20mDUB-LHR
£85
21/5Tue
directBritish Airways
1h 25mLHR-DUB
11/6Tue
directBritish Airways
1h 20mDUB-LHR
£89
21/5Tue
direct
1h 20mLHR-DUB
25/5Sat
direct
1h 20mDUB-LHR
£110
20/5Mon
directAer Lingus
1h 25mLHR-SNN
21/5Tue
directAer Lingus
1h 15mSNN-LHR
£116
20/5Mon
directAer Lingus
1h 20mLHR-DUB
21/5Tue
directAer Lingus
1h 20mDUB-LHR
£116
19/5Sun
direct
1h 20mLHR-DUB
21/5Tue
direct
1h 20mDUB-LHR
£118
18/5Sat
multi-stopKLM
5h 15mLHR-DUB
25/5Sat
multi-stopKLM
7h 20mDUB-LHR
£190
20/5Mon
multi-stopKLM
6h 05mLHR-DUB
28/5Tue
multi-stopKLM
4h 50mDUB-LHR
£198
20/5Mon
multi-stopScandinavian Airlines
5h 10mLHR-DUB
22/5Wed
multi-stopScandinavian Airlines
9h 00mDUB-LHR
£232
20/5Mon
multi-stopScandinavian Airlines
5h 10mLHR-DUB
28/5Tue
multi-stopScandinavian Airlines
6h 50mDUB-LHR
£233

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London Heathrow Airport - Ireland Flights

Departure:

London Heathrow Airport (LHR)United Kingdom

Return flight deals:

Ireland - London Heathrow Airport

Cabin classes:

£179
£344
£306
£80