€50 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 10/9. 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

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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€84
Cork
Corkdirect€116
Shannon
Shannondirect€105
Knock
Knockdirect€106
Donegal
Donegal1 stop€194
Milltown (Kerry)
Milltown (Kerry)1 stop€189
Dublin
Dublindirect€84
Cork
Corkdirect€116
Shannon
Shannondirect€105
Knock
Knockdirect€106
Donegal
Donegal1 stop€194
Milltown (Kerry)
Milltown (Kerry)1 stop€189

Cheap Flights from Heathrow to Ireland

 
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, 23 Sep - Wed, 24 Sep
British Airways Logo
16:50 - 18:20LHR-DUB
1h 30mdirect
British Airways Logo
10:55 - 12:30DUB-LHR
1h 35mdirect
€84British Airways
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Tue, 26 Aug - Wed, 27 Aug
British Airways Logo
18:10 - 19:35LHR-DUB
1h 25mdirect
British Airways Logo
08:30 - 10:05DUB-LHR
1h 35mdirect
€90British Airways
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Tue, 16 Sep - Wed, 17 Sep
British Airways Logo
18:10 - 19:35LHR-DUB
1h 25mdirect
British Airways Logo
10:50 - 12:30DUB-LHR
1h 40mdirect
€91British Airways
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Tue, 23 Sep - Wed, 24 Sep
British Airways Logo
16:50 - 18:20LHR-DUB
1h 30mdirect
British Airways Logo
10:55 - 12:30DUB-LHR
1h 35mdirect
€92British Airways
Find Deal
Tue, 2 Sep - Wed, 3 Sep
British Airways Logo
16:50 - 18:20LHR-DUB
1h 30mdirect
British Airways Logo
08:30 - 10:05DUB-LHR
1h 35mdirect
€93British Airways
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Tue, 19 Aug - Tue, 26 Aug
Aer Lingus Logo
19:10 - 20:35LHR-SNN
1h 25mdirect
Aer Lingus Logo
21:15 - 22:40SNN-LHR
1h 25mdirect
€105Aer Lingus
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Thu, 11 Sep - Thu, 18 Sep
Aer Lingus Logo
11:05 - 12:35LHR-NOC
1h 30mdirect
Aer Lingus Logo
13:05 - 14:30NOC-LHR
1h 25mdirect
€106Aer Lingus
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Tue, 2 Sep - Thu, 11 Sep
Aer Lingus Logo
11:05 - 12:35LHR-NOC
1h 30mdirect
Aer Lingus Logo
13:05 - 14:30NOC-LHR
1h 25mdirect
€108Aer Lingus
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Tue, 2 Sep - Thu, 11 Sep
Aer Lingus Logo
14:40 - 16:10LHR-SNN
1h 30mdirect
Aer Lingus Logo
07:40 - 09:05SNN-LHR
1h 25mdirect
€108Aer Lingus
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Sun, 5 Oct - Wed, 15 Oct
 Logo
14:55 - 16:20LHR-DUB
1h 25mdirect
 Logo
09:45 - 11:10DUB-LHR
1h 25mdirect
€128
Find Deal
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?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from London Heathrow Airport to Ireland.

The cheapest ticket to Ireland from London Heathrow Airport found in the last 72 hours was to Dublin, at €123 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 €123.

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 €123 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is €172 and €163 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.

For London Heathrow Airport to Ireland, Wednesday is the cheapest day to fly on average and Friday is the most expensive. Flying from Ireland back to London Heathrow Airport, the best deals are generally found on Friday, with Thursday being the most expensive.

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 4 weeks before departure, which saves you about 37% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.


Good to know

Low seasonJanuary
Cheapest flight€50
Best time to beat the crowds (35% less expensive on average)
Most popular time to fly (2% 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 LingusLHR-DUBJun 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 LingusLHR-DUBJun 2025
If you’re doing a transfer speak to someone at the desk don’t use an automated kiosk
ThomasFlew with Aer LingusLHR-DUBOct 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 €168 on average. Morning departures are around 13% more expensive than evening flights, on average. The most expensive time of day to fly to Ireland is generally in the afternoon, which is peak travel time and where the average cost of a ticket is €335.

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 €136 one-way - €167 round-trip; Shannon €91 one-way - €170 round-trip

Reviews of the 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 1191 reviews
6.8Entertainment
7.3Boarding
6.4Food
7.1Comfort
8.0Crew
Airline reviews

We booked a flight from FCO(Rome) with a stop over at DUB(Dublin) going to JFK. Boarding from Rome was kind of chaotic since the airport I guess is very small and we needed to shuttle to the airplane. The gate agent just let everyone and anyone go without using the sections so that took a lot longer than usual boarding. From drinking to JFk boarding was good and organized. Amazingly the flights was very smooth sailing and we’ve flown American big airplane to small companies before. The aircraft’s itself is on the older side, can’t complain tho because the plane ride wa smooth. For a 3 hour plane ride, nothing was complimentary. But for the longer leg of the plane complimentary snacks, meals and drinks were provided which was great. The food wasn’t bad either. I would fly with them again, great price and good service.

8.0 ExcellentGene, Jul 2025FCO - DUB
Read more Aer Lingus reviews

We booked a flight from FCO(Rome) with a stop over at DUB(Dublin) going to JFK. Boarding from Rome was kind of chaotic since the airport I guess is very small and we needed to shuttle to the airplane. The gate agent just let everyone and anyone go without using the sections so that took a lot longer than usual boarding. From drinking to JFk boarding was good and organized. Amazingly the flights was very smooth sailing and we’ve flown American big airplane to small companies before. The aircraft’s itself is on the older side, can’t complain tho because the plane ride wa smooth. For a 3 hour plane ride, nothing was complimentary. But for the longer leg of the plane complimentary snacks, meals and drinks were provided which was great. The food wasn’t bad either. I would fly with them again, great price and good service.

Comfortable trip , flight attendants professional as always. Only complaint was the food, We fly Aer Lingus frequently, this was the first time the quality of the meal was poor.

Everything went well. I made my connection which is always a concern.

I appteciate the very courteous staff. The flight was good. Something that wasn't good was that my bag was only checked as far as Dublin and I had a connecting flight to Vienna. (That was a mistake the ORD desk made.) Fortunately the desk at DUB was able to re-tag without me having to re-check in (which initially it seemed I might have to do.)

I had an awful experience at the ticketing agent stand. I had purchased three tickets, one of which I had the maiden name of a passenger on the ticket. They refused to help, assist, and actually delayed our process and had us miss an opportunity to purchase a ticket on the same flight. I was sent through multiple phone calls, none of which helped, and the person at the counter was the person who told me to both call Aer Lingus for help and was the person who said they could not fulfill my request that they were privy to from the beginning. My partner is still stuck in Scotland, racking up thousands of dollars in additional fees and tickets. I am very upset and two of my tickets went unused. I will never be using Aer Lingus ever again and I will continue to complain about them.

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.

When I booked the flight, I wasn't aware that this was a "no frills" flight. No wifi, no reclining seat, no complimentary soft drinks.

Charging for coffee on a business class fare??? And to not even mention it? Inexcusable. Boarding and disembarking was pathetic. Could not use a jetway on either end. Had to use stairs and walk across tarmac at origination and use stairs and be bussed to terminal at destination.

It was excellent! The plane left Chicago early. Arrived in Dublin early. The crew was excellent! It was a great experience.

The Nice airport was a horrible boarding experience. I have never experienced the kind of compressed mob (in the B12-B17 gate area) of people all unclear what was happening and no airport staff to assist. There was no signage and 1000’s of people waiting for any info for 2 hours.

Excellent everywhere but Philly, the most rotten airport in the world.

Check in was not the greatest as had to talk to an agent to clarify things and then he transferred us to another agent who had difficulty processing my credit card as there was a system glitch and not a card error.

All good. Loo’s weren’t great and as clean as i would like.

A great flight. The crew was excellent too. Of particular note of excellence was the gluten-free meal which was one of the best offerings I’ve ever had on a plane. Outstanding work, BA chefs.

I was put into business class. Wow! My flight attendant was great! The food amazing’

I got stuffed on both flights into terrible seats. Second flight the seat didn’t even recline and fit s tall person, that’s very uncomfortable.

I arrived at Bridgetown only to fins that a suitcase was missing. It was left at Manchester. I had to wait wait 2 days before deciding on going to collect from the airport personally. I am not happy about paying for baggage at the airport. This I thought was included in the price of the ticket. Who goes away for 2 weeks and does not bring luggage. This was a total rip off and I am not happy. I need someone to contact me before returning so that I don't have to pay all over again to return homde.

Boarding market okay just because of the delay we had, but not related to the crew in any way…

Not so good with their baggage handling as they damaged one of my check in luggage

Economy plus was a very enjoyable experience. Lots of room and the crew were fantastic with the kids. We even got a chance to meet the pilot

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

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