€56 Find Cheap Flights from London Heathrow Airport to Ireland

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 21/5. 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.
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Best Ireland Flight Deals from Heathrow

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

Dublin
Dublindirect€81
Cork
Corkdirect€95
Shannon
Shannondirect€104
Knock
Knockdirect€105
Donegal
Donegal1 stop€191
Milltown (Kerry)
Milltown (Kerry)1 stop€191

Good to know

Low season

January

High season

August

Cheapest flight

€56
Best time to beat the crowds (34% less expensive on average)
Most popular time to fly and prices are also 8% 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 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.

See more FAQs

Top tips for finding cheap flights to Ireland

  • Looking for a cheap flight? 25% of our users found tickets from London Heathrow Airport to the following destinations at these prices or less: Dublin €91 one-way - €149 round-trip
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be January, November and December. The cheapest month to fly from London is January.
  • Morning departure is around 20% more expensive than an evening flight, on average*.
See more tips
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 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.
7.1
Aer LingusOverall score based on 1070 reviews
7.0Comfort
7.9Crew
6.4Food
7.2Boarding
6.7Entertainment
Airline reviews

Very polite and helpful staff. Jet blue…ok, but not as helpful!..

10.0 ExcellentRALPH, Feb 2025MAN - DUB
Read more Aer Lingus reviews

Very polite and helpful staff. Jet blue…ok, but not as helpful!..

Seat was very uncomfortable. The worst in all of my travels. It sagged in the middle, worse than anything any airline can offer. Not flying aer lingus again.

My Aer Lingus flight (booking ref # 2SU4LF) was the worst travel experience I have ever dealt with. My flight from Paris to Dublin was delayed by over 2 hours which caused me to miss my connecting flight back to the US. I was not able to be rebooked on a new flight for another 3 days. When I finally made it on my rescheduled flight, it was delayed AGAIN, causing me to miss my connecting flight from New York to Boston. At this point I decided to just rent a car since the next flight I would have been able to get in wasn’t for another 5 hours. It was a complete nightmare experience and I will never fly Aer Lingus again. I have requested a refund from the booking company I placed my order with.

Flight was cancelled. There were no Aer Lingus reps to help. I had to rebook my flight and find a hotel. Still had nothing from the airline.

They couldn't do through check-in for us. They took 2 hours to issue just one leg of the boarding pass. They had no idea to handle the case of passengers who travels to USA via Dublin airport. we had tough time time Dublin airport as boarding pass for the US flight was not pre-issued. Hope Aer Lingus will learn to handle such cases which they couldn't learn in in the past 50 years of the service.

There was a very drunk and disruptive passenger who was on the plane, right behind me. He was already drunk before boarding but was still let on the plane. He kept kicking and hitting the back of my chair the entire flight. It was an early morning flight and had zero rest on that leg

Very sad, couldn't stop crying. Was an hour delay in Ireland and when we got to Canada the flight was boarded and couldn't get on. Was the last flight of the day. Now in a hotel waiting on a stand by.I have to got o work, so I'll go first available while my son stays in the hotel til one's available

Both flights late. Almost missed connecting flight and flight staff not willing to help expedite us off the plane.

I didn’t realize Aer Lingus was a “nickel and dime” kind of airline where you had to separately buy all the amenities you wanted. The push to purchase duty-free beauty products was off-putting. And our row had the least amount of leg room I’ve ever dealt with on a flight.

We couldn't talk to aer lingus we had issues with the flight change and aer lingus made us talk to kayak

We found the bag drop/ check-in proceedure at T5 unnecessarily complicated. We paid extra for seat selection in advance and were allocated worse seats at T5. We found the check-in person was not particularly helpful although the the staff at the gate were super good.

Very dated plane. Seat was firm and uncomfortable. Entertainment system almost laughably outdated. Poor audio. Picture was always too dark.

The seats on the plane and at Heathrow Airport are so uncomfortable

They did not provide free WiFi, It could be purchased for, I think, around $25, This seemed excessive.

Good flight, awful, vindictive, vile customer services in T5 Heathrow.

Ok we did get an upgrade and the flight was delayed 45 minutes BUT without any bias. The crew were excellent, friendly, efficient and verging on exuberant, they all were so happy to do their jobs. Food excellent and the new safety video is fun to watch.

Reliable, great value, but not outstanding in any aspect. This is similar to the experience you get in most international carriers like Etihad or Delta.

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

Flight got diverted because of an emergency and the crew were fantastic and probably saved that passenger’s life. While in emergency landing some measures could have been taken to prevent additional delays. In general not great experience with BA. I used to fly BA years ago all the time, very disappointed by the whole experience, seats were tight, bathrooms tight.

Business class area too small and chair and equipment not comfortable .

Book cheap flights from London to Ireland

Recent return flight deals

7/5Wed
directBritish Airways
1h 25mLHR-DUB
8/5Thu
directBritish Airways
1h 20mDUB-LHR
€81
7/5Wed
directBritish Airways
1h 25mLHR-DUB
8/5Thu
directBritish Airways
1h 20mDUB-LHR
€82
15/4Tue
directBritish Airways
1h 25mLHR-DUB
23/4Wed
directBritish Airways
1h 20mDUB-LHR
€83
1/4Tue
directAer Lingus
1h 20mLHR-ORK
22/4Tue
directAer Lingus
1h 15mORK-LHR
€95
20/3Thu
directAer Lingus
1h 20mLHR-SNN
27/3Thu
directAer Lingus
1h 25mSNN-LHR
€104
21/3Fri
direct
1h 20mLHR-DUB
28/3Fri
direct
1h 20mDUB-LHR
€115
5/3Wed
direct
1h 25mLHR-DUB
12/3Wed
direct
1h 35mDUB-LHR
€125
22/3Sat
1 stopKLM
4h 15mLHR-DUB
23/3Sun
1 stopKLM
4h 50mDUB-LHR
€171
22/3Sat
1 stopKLM
8h 00mLHR-DUB
24/3Mon
1 stopKLM
5h 50mDUB-LHR
€174
12/6Thu
1 stopSWISS
19h 55mLHR-ORK
17/6Tue
1 stopSWISS
5h 30mORK-LHR
€194

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Recent one-way flight deals

21/5Wed
directBritish Airways
1h 25mLHR-DUB
€56
31/3Mon
directAer Lingus
1h 30mLHR-SNN
€56
29/4Tue
directAer Lingus
1h 20mLHR-ORK
€57
21/5Wed
directBritish Airways
1h 25mLHR-DUB
€57
26/3Wed
1 stopVueling
16h 40mLHR-DUB
€67
8/4Tue
1 stopIberia
13h 45mLHR-DUB
€88
8/3Sat
1 stopVueling
15h 05mLHR-DUB
€95
21/3Fri
1 stopKLM
11h 40mLHR-DUB
€103
26/3Wed
1 stopKLM
6h 20mLHR-DUB
€112
2/3Sun
1 stopIberia
28h 15mLHR-DUB
€132

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Last minute flights from Heathrow to Ireland

Last minute flight, train and bus deals

24/2Mon
directAer Lingus
1h 20mLHR-SNN
25/2Tue
directAer Lingus
1h 20mSNN-LHR
€136
22/2Sat
directBritish Airways
1h 25mLHR-DUB
22/3Sat
directBritish Airways
1h 20mDUB-LHR
€140
24/2Mon
directAer Lingus
1h 20mLHR-SNN
25/2Tue
directAer Lingus
1h 25mSNN-LHR
€140
22/2Sat
directBritish Airways
1h 25mLHR-DUB
26/2Wed
directBritish Airways
1h 20mDUB-LHR
€179
25/2Tue
multi-stopSWISS
16h 00mLHR-DUB
3/3Mon
multi-stopSWISS
23h 40mDUB-LHR
€234
25/2Tue
multi-stopSWISS
16h 00mLHR-DUB
1/3Sat
multi-stopSWISS
13h 25mDUB-LHR
€255
23/2Sun
multi-stopKLM
11h 40mLHR-DUB
1/3Sat
multi-stopKLM
14h 20mDUB-LHR
€339
21/2Fri
multi-stopLufthansa
5h 10mLHR-DUB
24/2Mon
multi-stopLufthansa
14h 05mDUB-LHR
€366
21/2Fri
multi-stopLufthansa
14h 45mLHR-DUB
25/2Tue
multi-stopLufthansa
5h 45mDUB-LHR
€368
22/2Sat
multi-stopKLM
4h 15mLHR-DUB
26/2Wed
multi-stopKLM
5h 00mDUB-LHR
€371

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

Information on your arrival and departure airports

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