£42 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 21/2. 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£60
Cork
Corkdirect£109
Shannon
Shannondirect£102
Knock
Knockdirect£101
Milltown (Kerry)
Milltown (Kerry)1 stop£182
Dublin
Dublindirect£60
Cork
Corkdirect£109
Shannon
Shannondirect£102
Knock
Knockdirect£101
Milltown (Kerry)
Milltown (Kerry)1 stop£182

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

Tue, 10 Mar - Thu, 12 Mar
British Airways Logo
06:30 - 07:55
LHR
-
DUB
1h 25mdirect
British Airways Logo
10:30 - 12:05
DUB
-
LHR
1h 35mdirect
£60British Airways
Wed, 15 Apr - Wed, 22 Apr
British Airways Logo
18:05 - 19:30
LHR
-
DUB
1h 25mdirect
British Airways Logo
10:30 - 12:00
DUB
-
LHR
1h 30mdirect
£65British Airways
Thu, 26 Feb - Mon, 2 Mar
British Airways Logo
06:30 - 07:55
LHR
-
DUB
1h 25mdirect
British Airways Logo
20:40 - 22:00
DUB
-
LHR
1h 20mdirect
£70British Airways
Mon, 2 Mar - Fri, 6 Mar
British Airways Logo
18:15 - 19:40
LHR
-
DUB
1h 25mdirect
British Airways Logo
20:35 - 21:55
DUB
-
LHR
1h 20mdirect
£71British Airways
Mon, 2 Mar - Fri, 6 Mar
British Airways Logo
18:15 - 19:40
LHR
-
DUB
1h 25mdirect
British Airways Logo
20:35 - 21:55
DUB
-
LHR
1h 20mdirect
£71British Airways
Tue, 10 Feb - Tue, 17 Feb
Aer Lingus Logo
10:55 - 12:25
LHR
-
NOC
1h 30mdirect
Aer Lingus Logo
13:00 - 14:30
NOC
-
LHR
1h 30mdirect
£101Aer Lingus
Fri, 27 Feb - Fri, 6 Mar
Aer Lingus Logo
15:15 - 16:45
LHR
-
SNN
1h 30mdirect
Aer Lingus Logo
20:05 - 21:25
SNN
-
LHR
1h 20mdirect
£102Aer Lingus
Thu, 12 Feb - Mon, 23 Feb
Aer Lingus Logo
18:05 - 19:25
LHR
-
SNN
1h 20mdirect
Aer Lingus Logo
07:50 - 09:15
SNN
-
LHR
1h 25mdirect
£103Aer Lingus
Fri, 27 Feb - Fri, 6 Mar
Aer Lingus Logo
15:15 - 16:45
LHR
-
SNN
1h 30mdirect
Aer Lingus Logo
17:30 - 18:55
SNN
-
LHR
1h 25mdirect
£103Aer Lingus
Fri, 10 Apr - Sun, 12 Apr
Multiple Airlines Logo
07:40 - 17:35
LHR
-
KIR
9h 55m
1 stop
Multiple Airlines Logo
10:40 - 20:20
KIR
-
LHR
9h 40m
1 stop
£182Multiple 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 72 hours was to Dublin, at £87 return. The most popular route is from London Heathrow Airport (LHR) to Dublin (DUB), and the cheapest round-trip airline ticket found on this route in the last 72 hours was £87.

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 £133, 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 £106 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is £147 and £143 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 41% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

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

Low seasonDecember
Cheapest flight£42
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly (14% 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.

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

    The cheapest time of day to fly to Ireland is generally in the evening, when retur flights cost £139 on average. Morning departures are around 253% 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 £490.

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.
7.2
Aer LingusOverall score based on 1435 reviews
6.9Entertainment
6.6Food
7.4Boarding
7.1Comfort
8.0Crew
Airline reviews

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.

6.0 GoodAnonymous, Jan 2026
LHR - DUB
Read more Aer Lingus reviews

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.

The trip was mostly nice, till the last moment when they had some issue with opening the flight door. The flight arrived late by 10 minutes, which was ok-ish, but then we got stuck on the plane for 35 minutes at the bridge and that costed our connection flight to LAX which left with 12+ passengers still on our flight. It added 2 days to our trip home, and we had to make lots of rearrangements to deal with the ripple effects. Don't book a 1+ stop trip with a layover time less than 2 hours.

My seat was broken. No sound available and the armrest between my wife and I was broken so it could only fold halfway up. Seats were a big close together so they felt a bit claustrophobic. Boarding was a little frustrating in Dublin as there is not sufficient room to actually queue up. Boarding was also frustrating for people behind me who were unable to use the overhead due to people abusing the privilege and putting more than one item each up there. Staff was friendly and helpful to those people.

The staff was amazing, so friendly and responsive. Check in was tedious as the online service was not available and the desk understaffed. It took a full hour in line to check in. The seats, in economy, where quite spacious until the people in front of us reclined their seats which then meant the seat was touching our knees. The inconsiderate people who were seated in a bulkhead kept their seats reclined for 80% of the flight and then got annoyed when we bumped their seats while shifting positions. It was highly unpleasant..

The connection time between the regional flight (from Newcastle) to an international flight (to The States) was too short. To require as second security scan and customs clearance within an hour and 20 mins is not enough time to make the actual connection. We had a final boarding call the minute we walked out of US customs and had to sprint (with two small children) through 20 gates to make it in time before the door closed. The concept is great in theory to clear customs before leaving Europe, but the timing needs to be adjusted. We travel abroad frequently and won’t be using this route again. Thanks.

Canceled my flight couple hours before takeoff. They could not find a decent re-routing and refused to pay for when i subjected alternative with Lufthansa.

Seats a little to soft on the SFO DUB flight

I was not admitted to the flight!!! I need a refund for this

Well, I think we left close to on time. Crew was “eh”.

This is a bit of a rant, but I'll try to keep it civil. The flight was delayed for 2 hours with almost ZERO updates from agents. Just "there's technical issues, we don't know if or when it'll be resolved" once an hour maybe? And the gate signs, and app never updated to show the delay until it was finally resolved. So when I called Aer Lingus to see if I could rebook, I had literally the dumbest conversation with the person on the phone there where he says "It's showing your flight departed at 11:10. So it's already departed!", where I responded, "Well, it's 12:45 and I'm on the phone with you, standing in the airport, staring at the plane. So...I'm not sure what your system is saying, but we aren't in the air right now.". He said "Nothing I can do. Since it doesn't show delayed in my system, you would be charged to reschedule." Once we finally departed 2 hours late, things were going smoothly as I would expect, except in another very strange way. The stewardesses were rolling the cart down the aisle offering drinks and I asked for a water, to which they said "Sure, you can buy a bottle". I'm not sure if this is an Aer Lingus thing. Maybe something I'd expect from Ryan Air, but for a 3 hour international flight, to not have complimentary water available for customers is an absolute first, in 15 years of flying for me. I'm not upset with the plane staff at all. They were very friendly, but Aer Lingus' policies, how they handled the delay, and the unbelievable conversation with the customer service representative, leaves a lot to be desired in those areas. Also, I'm not upset about the delay. Things happen. Technical issues. But this is a place where airlines really need to clearly communicate with their customers. They also changed gates from 12N to 13N and there was no notification on any app, or announcement over the PA. End of rant. I hope they get some feedback on how to improve communication, because otherwise, they were great. And the second leg of my trip was incredibly smooth - no nickle and diming water, no communication issues. Very professional and efficient and even landed early

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

Take off was great but landing is always with a bump.

Staff were very professional. Much better than the outgoing flight from Dublin. Seat cushions were practically non existent. Making for a very uncomfortable flight.

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.

They were extremely unprofessional and unhelpful at check in. They did not understand laws related to Spanish residents flying with family It was very discriminatory the way we were treated.

A delay of almost 3 hours. It was evident that the staff wanted us to board urgently, to the point of rudeness, to avoid paying compensation

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

On time arrival but the aircraft had seen better days and needed a deep clean.

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

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Late. And service was very slow - passengers sat for well over an hour with dirty trays etc surrounding them

Entertainment devices on A380 need to be fixed, the seats might do with updates.

I like everything about British Airways. Excellence. Perfect. Exquisite service.

The plane was dirty the food was awful and the boarding process took too long

Everything. Employees offered to help me because I had to use a cane.

Check-in and boarding were great. On flight staff were rude and disrespectful. Paid for extra room and found it incredibly cramped. Bathrooms kept in poor condition. Overall negative experience.

The business class seating arrangement for LHR to MAA was very uncomfortable. The movie options were terrible.

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

Information on your arrival and departure airports