€46 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 20/1. 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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Flight Deals

Best Ireland Flight Deals from Heathrow

Cheapest return prices found by our users on KAYAK in the last 72 hours
Dublin
Dublindirect€69
Cork
Corkdirect€102
Shannon
Shannondirect€96
Knock
Knockdirect€108
Donegal
Donegal1 stop€194
Milltown (Kerry)
Milltown (Kerry)1 stop€196
Dublin
Dublindirect€69
Cork
Corkdirect€102
Shannon
Shannondirect€96
Knock
Knockdirect€108
Donegal
Donegal1 stop€194
Milltown (Kerry)
Milltown (Kerry)1 stop€196

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

Thu, 22 Jan - Sun, 25 Jan
British Airways Logo
15:30 - 17:00
LHR
-
DUB
1h 30mdirect
British Airways Logo
20:40 - 22:00
DUB
-
LHR
1h 20mdirect
€69British Airways
Sat, 10 Jan - Sat, 17 Jan
British Airways Logo
13:35 - 15:05
LHR
-
DUB
1h 30mdirect
British Airways Logo
13:10 - 14:35
DUB
-
LHR
1h 25mdirect
€74British Airways
Sat, 24 Jan - Sat, 31 Jan
British Airways Logo
18:25 - 19:50
LHR
-
DUB
1h 25mdirect
British Airways Logo
20:40 - 22:00
DUB
-
LHR
1h 20mdirect
€78British Airways
Fri, 9 Jan - Tue, 13 Jan
British Airways Logo
06:30 - 07:55
LHR
-
DUB
1h 25mdirect
British Airways Logo
08:50 - 10:25
DUB
-
LHR
1h 35mdirect
€79British Airways
Fri, 9 Jan - Tue, 13 Jan
British Airways Logo
06:30 - 07:55
LHR
-
DUB
1h 25mdirect
British Airways Logo
08:50 - 10:25
DUB
-
LHR
1h 35mdirect
€80British Airways
Sat, 10 Jan - Sat, 24 Jan
British Airways Logo
15:30 - 17:00
LHR
-
DUB
1h 30mdirect
British Airways Logo
10:55 - 12:30
DUB
-
LHR
1h 35mdirect
€81British Airways
Wed, 7 Jan - Wed, 21 Jan
Aer Lingus Logo
15:15 - 16:45
LHR
-
SNN
1h 30mdirect
Aer Lingus Logo
20:05 - 21:25
SNN
-
LHR
1h 20mdirect
€96Aer Lingus
Tue, 6 Jan - Tue, 13 Jan
Aer Lingus Logo
22:05 - 23:25
LHR
-
ORK
1h 20mdirect
Aer Lingus Logo
16:05 - 17:20
ORK
-
LHR
1h 15mdirect
€102Aer Lingus
Wed, 21 Jan - Wed, 28 Jan
Aer Lingus Logo
22:05 - 23:25
LHR
-
ORK
1h 20mdirect
Aer Lingus Logo
17:35 - 18:50
ORK
-
LHR
1h 15mdirect
€104Aer Lingus
Sat, 24 Jan - Sat, 31 Jan
Multiple Airlines Logo
06:30 - 20:00
LHR
-
CFN
13h 30m1 stop
Multiple Airlines Logo
14:30 - 22:00
CFN
-
LHR
7h 30m1 stop
€194Multiple 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 €82 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 €82.

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 €120 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of return tickets is €171 and €169 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, Tuesday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Ireland back to London Heathrow Airport, the best deals are generally found on Friday, with Monday 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 5 weeks before departure, which saves you about 43% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight€46
Best time to beat the crowds (22% less expensive on average)
Most popular time to fly (13% 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 €154 on average. Morning departures are around 7% 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 €286.

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 €87 one-way - €82 round-trip

Reviews of the top airline 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.
6.7
British AirwaysOverall score based on 7571 reviews
7.6Crew
6.9Boarding
6.4Entertainment
6.4Food
6.7Comfort
Airline reviews

Nice lounge but had a 5 hour layover which is a lot

8.0 ExcellentAnonymous, Dec 2025
LHR - DXB
Read more British Airways reviews

Nice lounge but had a 5 hour layover which is a lot

Flight on time and priority boarding worked. I travelled economy although business was available as no flights are cheap these days and at least with BA loyalty card I get a baggage allowance for nothing. That made the flight comparable or even cheaper than the ‘budget’ alternative. As for catering and entertainment - not on a BA short haul economy ! At least we were offered biscuits and water! Catering for economy short haul has been reduced to the minimum - no tea or coffee or other drinks than water (from a large bottle with a paper cup on offer). They will say this is better for the environment, which it is, but proper waste management is still needed for empty packets etc. so actually it’s a money saver.

Audi visual not working for a whole group of seats in first class. How does a plane leave the main hub in such poor condition? How much that we can’t see so immediately is also compromised?

main meals are horrible but then you dont fly for the food

It was good. Couldn’t Check in online and select seats

It was great. Enough space and room for legs . Great service to.

⭐ British Airways Review — A Journey of Highs, Lows, and Lessons ⭐ I recently flew Business Class round-trip from Boston to Mumbai with British Airways, and my experience was a tale of two extremes — from disappointment to exceptional service, and then back to inconsistency. Boston → London: A Surprisingly Poor Start My journey began on a disappointing note. On a 6-hour Business Class flight, I was surprised to discover that there wasn’t a single proper vegetarian meal option available. I was offered a few bakery items only after repeatedly requesting something to eat. The flight attendant shrugged, offered no solution, and eventually — quite literally — threw some bread at me after much delay. This was not only disheartening, it was extremely surprising given my wonderful Business Class experience with BA last year. I stepped off that flight genuinely hungry and had to make a mad dash to the lounge just to get a proper meal. London → Mumbai: A Complete Turnaround The next sector restored my faith in British Airways. The entire crew was warm, welcoming, attentive, and genuinely caring. A special shoutout to Phiroze and the entire team serving the Business Class cabin — their professionalism, hospitality, and thoughtful service were extraordinary. They truly embodied what makes British Airways a global leader, and I am deeply grateful for the experience they provided. This is the BA I know and love. Mumbai → London: A Strange Meal Schedule This sector was generally fine, but the meal timing was puzzling. Lunch at 10:30 AM — for a Business cabin — felt unusual, and most passengers, including myself, barely touched it. The rest of the service was smooth, but the scheduling definitely needs a rethink. London → Boston: Mixed Experience Again The flight itself was decent, but the Business Lounge at Heathrow for this leg was a letdown. Arrived during lunch hours: no hot vegetarian options available Lounge area: dirty dishes everywhere Even after politely alerting the staff, the dishes were ignored and left uncleared For a premium cabin passenger — and at one of the world’s busiest international hubs — this was disappointing. Overall Impression My journey with British Airways felt inconsistent — two great sectors sandwiched between two that fell short of the BA standard. When BA is good, it is world-class. When it misses, the gap is noticeable. I genuinely hope the airline takes this feedback as constructive insight. I continue to believe in British Airways, and I commend the outstanding crew on the London → Mumbai sector — they were the highlight of my entire trip. With a little more focus on vegetarian meal availability, lounge service, and consistency across crews, BA can ensure every Business Class passenger experiences the premium journey they promise.

We were in business class and I had seat # 1. This was a night flight and after dinner was served, lights were dimmed and I went to sleep. The crew were loud and noisy so I didn’t get much sleep. I expect the crew to enjoy themselves but would Appreciate some decency in staying quiet while the passengers sleep

Have travelled business class with other airlines who profess to be the best in the world. They can however not beat the service and comfort that BA provide.

Great on board entertainment Tasty food Cattle class obviously crammed but not as bad as shorter hall flights

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

Information on your arrival and departure airports