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Find cheap flights from Ireland to London Heathrow Airport from £50

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Heathrow departing on 15/5. 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.
1 adult
0 bags
Mon 3/6
Mon 10/6

Search hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
In the last 7 days, travellers have searched 43,369,418 times on KAYAK, and here's why:

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Flights to Heathrow - Travel Insights & Trends

Get data-powered insights and trends into flights to Heathrow to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to London Heathrow Airport?

These are the best prices found by users searching on KAYAK in the last 72 hours.
The cheapest airline ticket to London Heathrow Airport from the Ireland in the last 72 hours was £40 one-way, and £97 round-trip on the route from Dublin to London Heathrow Airport. The most popular route is from Cork to London Heathrow Airport and the cheapest ticket found on this route in the last 72 hours was £101 return.

How much is a flight to London Heathrow Airport?

The average and cheapest price for all flights to London Heathrow Airport from each origin found by users searching on KAYAK in the last month.
On average, a flight to London Heathrow Airport costs £270. The cheapest price found on KAYAK in the last 2 weeks cost £41 and departed from Knock. The most popular routes on KAYAK are Dublin to London Heathrow Airport which costs £498 on average, and Cork to London Heathrow Airport, which costs £155 on average.
See prices from:

What is the cheapest day to fly to London?

The average price of all flights to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.
Based on KAYAK data, the cheapest day to fly to London is Tuesday where tickets can be as cheap as £80. On the other hand, the most expensive day to fly is Sunday, where prices are £147 on average.

What is the cheapest month to fly to London Heathrow Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to London Heathrow Airport, 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 to London Heathrow Airport is February, where tickets cost £101 on average for one-way flights. On the other hand, the most expensive months are July and October, where the average cost of tickets from Ireland is £150 and £141 respectively. For return trips, the best month to travel is November with an average price of £75.

What is the cheapest time of day to fly to London Heathrow Airport?

The average price for all flights to London Heathrow Airport depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to London Heathrow Airport is generally in the morning, when flights cost £97 on average. The most expensive time of day to fly to London Heathrow Airport is generally in the afternoon, which is peak travel time and where the average cost of a ticket is £117.

What is a good deal for flights to London Heathrow Airport?

If you’re looking for cheap airfare to London Heathrow Airport, 25% of our users found tickets to London Heathrow Airport for the following prices or less: From Knock £47 one-way - £106 return, from Shannon £56 one-way - £163 return, from Cork £64 one-way - £110 return.

How far in advance should I book a flight to London Heathrow Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 72 days before departure.

Which airline offers the most flights to London Heathrow Airport?

Of the 2 airlines that fly to London Heathrow Airport, British Airways offers the most flights, with around 353 per week, followed by Loganair with 31 flights per week.

How long is the flight to London Heathrow Airport?

The duration of your flight to London depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to London on KAYAK are from Shannon, which takes 1h 15m, Cork, which takes 1h 15m, Dublin, which takes 1h 15m, and Knock, which takes 1h 25m.

How many direct flights to London Heathrow Airport are there each day?

There are around 55 direct flights from within Ireland to London Heathrow Airport every day. Most flights depart in the morning, with 10:00 the most common departure time and 49% of flights departing in the morning.

How many direct flights to London Heathrow Airport are there each week?

Each week there are around 384 direct flights from within Ireland to London Heathrow Airport. The most common day for departures is Tuesday, with 16% of flights taking off on this day.

How many long-haul flights are there to London Heathrow Airport each week?

There are not any long-haul (6-12 hour flight duration) or medium-haul (3-6 hour flight duration) flights to London Heathrow Airport. Instead, there are 194 short-haul flights (up to 3 hour flight duration), with the most arriving from Dublin.

How many cities have direct flights to London Heathrow Airport?

From Ireland, there are direct flights to London Heathrow Airport from 4 cities. The city with the most direct flights is Dublin, with 139 direct flights each week.

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

Low season

January

High season

July

Cheapest flight

£50
Best time to beat the crowds (17% less expensive on average)
Most popular time to fly (7% more expensive on average)
Flight from Dublin to London Heathrow Airport

FAQs - booking London Heathrow Airport flights

  • What is the cheapest flight to London Heathrow Airport?

    The cheapest airline ticket to London Heathrow Airport from the Ireland in the last 72 hours was £40 one-way, and £97 round-trip on the route from Dublin to London Heathrow Airport. The most popular route is from Cork to London Heathrow Airport and the cheapest ticket found on this route in the last 72 hours was £101 return.

  • How far is London Heathrow Airport from central London?

    The distance between London Heathrow Airport and the city centre of London is 14 miles.

  • How much is a flight to London?

    On average, a flight to London costs £270. The cheapest price found on KAYAK in the last 2 weeks cost £41 and departed from Knock Intl Airport.

  • How does KAYAK find such low prices on flights to London Heathrow Airport?

    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 to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to 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 to London Heathrow Airport?

    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 London Heathrow Airport 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 to London Heathrow Airport?

    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 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 cheap flights to London Heathrow Airport

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest London Heathrow Airport flight deals.

Prefer to fly direct to London Heathrow?

Find which airlines fly direct to Heathrow, which days they fly and book direct flights.

Direct departures

Ireland to London Heathrow

Monday

ANA, AccesRail, Aegean Airlines, +89 more

ANA, AccesRail, +90 more

Tuesday

ANA, AccesRail, Aegean Airlines, +89 more

ANA, AccesRail, +90 more

Wednesday

ANA, AccesRail, Aegean Airlines, +91 more

ANA, AccesRail, +92 more

Thursday

ANA, AccesRail, Aegean Airlines, +86 more

ANA, AccesRail, +87 more

Friday

ANA, AccesRail, Aegean Airlines, +93 more

ANA, AccesRail, +94 more

Saturday

ANA, AccesRail, Aegean Airlines, +88 more

ANA, AccesRail, +89 more

Sunday

ANA, AccesRail, Aegean Airlines, +91 more

ANA, AccesRail, +92 more

See more direct flights

Direct returns

London Heathrow to Ireland

Monday

ANA, AccesRail, Aegean Airlines, +89 more

ANA, AccesRail, +90 more

Tuesday

ANA, AccesRail, Aegean Airlines, +89 more

ANA, AccesRail, +90 more

Wednesday

ANA, AccesRail, Aegean Airlines, +91 more

ANA, AccesRail, +92 more

Thursday

ANA, AccesRail, Aegean Airlines, +86 more

ANA, AccesRail, +87 more

Friday

ANA, AccesRail, Aegean Airlines, +93 more

ANA, AccesRail, +94 more

Saturday

ANA, AccesRail, Aegean Airlines, +88 more

ANA, AccesRail, +89 more

Sunday

ANA, AccesRail, Aegean Airlines, +91 more

ANA, AccesRail, +92 more

See more direct flights
See more direct flights

Top 3 airlines serving from Ireland to Heathrow

 
See real verified KAYAK customer reviews for airlines flying to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Ireland to London. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Heathrow? 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 1341 reviews
7.3Boarding
6.6Food
8.0Crew
7.0Entertainment
7.1Comfort
Airline reviews

Short flight so not much to rate. Surprised I had to pay for a soda.

8.0 ExcellentAnonymous, Apr 2024DUB - LHR
Read more about Aer Lingus reviews

Short flight so not much to rate. Surprised I had to pay for a soda.

the room on the plane was good but that is because flight not sold the other three seat and I had room. the food in terrible.

First the price I paid was excellent, my flight was full, but my seat was roomy. The one downside to the experience was they had games on the entertainment console. The guy behind me poked at my head about half the flight. I hope they get rid of this feature.

Very good need to offer better choice of food for business

They should. Heck planes more often not when they are suppose to be leaving causing delays

Crew was fantastic got lovely food and plenty of water. Entertainment was good. Never had to ask for anything. Left on time and got to Seattle early. Luggage did not take long either.

Always find Aer Lingus reliable and good value for money. Food on this flight was pretty basic and the headphone Jack at my seat only worked for one ear. Little disappointed in movie selection, limited on recent releases. Staff are okay - but I always buy a cheap ticket so not like I expect first class opulence anyway!!!

Boarding was so quick, flight was ahead of time which is great and the pilot spoke clearly and was letting people know everything, amazing, love travelling with you 😊

Great hospitality and service! Seats could always be cushioned better.

As four hour wait with no explanation as to why the delay Very unacceptable

Perfect timing, perfect departure, lovely crew on the ground and in the air.

Good flight. Take off a little late but make up the time

Everything’s went straight forward, no issues, good service and friendly crew

Left on time and arrived on time both ways, thank you

The flight was 45 mins delayed but the crew provided water and necessities like tissues

Cheap flights as you expect with Ryanair. I would take cheaper flights over entertainment and comfort for short haul travel. Main issue is usually delays at airports. In this case we landed roughly 2hr30 later than planned due to earlier delays with the plane. Not the worst I imagine

We each paid for 10kg checked in luggage. Flying out there were no issues sharing one case (20kg). Not so coming back. Additional £48 charge and unable to provide an explanation of why it was ok on one journey but not the other, or indeed what material difference it makes between 2x10kg cases vs 1x20kg case. Scam, and appalling from Ryanair.

Easy process and good flight experience The food good be better

I didn't like. The seats and the floor were very dirty and it is not the first time

Unfortunately didn't realise how far away Frankfurt Hahn airport is from Frankfurt the city. Outbound flight was delayed by 2.5 hours and no communication at airport, just a whisper emknating through the packed crowd ready to board at the gate as someone read out an email they had received. All rather poor and pathetic

We missed the flight to Barcelona because the flight from Baltimore was delayed. We flew on Vueling VW6653. Our luggage didn’t arrive. Please help us get our luggage. We are staying at Hotel Gran Via in Barcelona

They allowed some guy to move seats after 3hours of him being next to someone very sick, There were several empty seats, but they moved him to mine. I find that incredibly inconsiderate and should not have been done.

Excellent. Very nice and comfortable business class. Only negative is that it was difficult to hear the pilot’s announcement.

Food not so good. Need more veggies and whole grain especially the late food. Couldn’t figure out how to use the entertainment system.

Check in was horrendous! Economy took 2 hours before seeing an agent. Business class was 0.5 - 1 hour.

The first class flight itself was first class, however getting to the airport and getting through the airport was agony. The BA flight sat on the taxiway for ages and caused us to miss our connecting flight which meant half a day lost. Our return flight on BA was cancelled so a dawn flight was made and we lost another half day. Goodby BA

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

There was some delay at Heathrow where a machine needed to "start the engines" wasn't available and they couldn't even find the team tasked to do it. Unacceptable. Caused about an hour delay and seemed unnecessary. Also saw several passengers abusing the overhead luggage situation, having too many large bags and not leaving enough space for others. The crew was good and the refreshments were good in quality and quantity.

They cancelled our ticket, gave us no warning, they reissued it 4 days prior to trip and it was cancelled again when we got to the airport- very stressful, the flight was overbooked so they drove us across Milan to malpensa

Book cheap flights from Ireland to London

Recent return flight deals

 
These are the cheapest return flights to London found on KAYAK in the last 72 hours.
16/5Thu
directAer Lingus
1h 25mDUB-LHR
20/5Mon
directAer Lingus
1h 20mLHR-DUB
£123
18/5Sat
directAer Lingus
1h 20mDUB-LHR
19/5Sun
directAer Lingus
1h 20mLHR-DUB
£123
1/6Sat
directBritish Airways
1h 20mDUB-LHR
5/6Wed
directBritish Airways
1h 25mLHR-DUB
£127
13/7Sat
directBritish Airways
1h 20mDUB-LHR
14/7Sun
directBritish Airways
1h 25mLHR-DUB
£127
1/6Sat
direct
1h 25mDUB-LHR
8/6Sat
direct
1h 25mLHR-DUB
£131
7/6Fri
1 stop
19h 55mDUB-LHR
8/6Sat
direct
1h 25mLHR-DUB
£134
5/6Wed
1 stopSWISS
13h 10mDUB-LHR
10/6Mon
1 stopSWISS
16h 05mLHR-DUB
£142
7/6Fri
1 stopScandinavian Airlines
19h 55mDUB-LHR
8/6Sat
1 stopScandinavian Airlines
17h 55mLHR-DUB
£144
7/6Fri
1 stopSWISS
12h 20mDUB-LHR
11/6Tue
1 stopSWISS
6h 10mLHR-DUB
£152
22/7Mon
1 stopScandinavian Airlines
19h 45mDUB-LHR
23/7Tue
1 stopScandinavian Airlines
12h 10mLHR-DUB
£161

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to London found on KAYAK in the last 72 hours.
15/5Wed
directAer Lingus
1h 20mDUB-LHR
£50
6/7Sat
directAer Lingus
1h 20mDUB-LHR
£51
30/7Tue
directBritish Airways
1h 20mDUB-LHR
£53
9/8Fri
directBritish Airways
1h 20mDUB-LHR
£56
25/5Sat
1 stopVueling
18h 10mDUB-LHR
£58
25/5Sat
1 stopVueling
18h 10mDUB-LHR
£61
15/5Wed
1 stopScandinavian Airlines
5h 00mDUB-LHR
£73
7/8Wed
1 stopScandinavian Airlines
5h 20mDUB-LHR
£74
20/6Thu
1 stopIberia
12h 25mDUB-LHR
£82
18/6Tue
1 stopIberia
13h 00mDUB-LHR
£88

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Last minute flights to Heathrow

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to London that are departing in the next 10 days.
9/5Thu
direct
1h 25mDUB-LHR
11/5Sat
direct
1h 25mLHR-DUB
£114
8/5Wed
directAer Lingus
1h 25mDUB-LHR
9/5Thu
directAer Lingus
1h 20mLHR-DUB
£122
9/5Thu
directBritish Airways
1h 20mDUB-LHR
17/5Fri
directBritish Airways
1h 25mLHR-DUB
£123
6/5Mon
directBritish Airways
1h 30mDUB-LHR
13/5Mon
directBritish Airways
1h 25mLHR-DUB
£124
9/5Thu
multi-stopScandinavian Airlines
6h 10mDUB-LHR
13/5Mon
multi-stopScandinavian Airlines
5h 10mLHR-DUB
£213
9/5Thu
multi-stopKLM
4h 50mDUB-LHR
17/5Fri
multi-stopKLM
3h 55mLHR-DUB
£213
6/5Mon
multi-stopKLM
4h 50mDUB-LHR
9/5Thu
multi-stopKLM
5h 15mLHR-DUB
£230
5/5Sun
multi-stopAir France
4h 25mDUB-LHR
9/5Thu
multi-stopAir France
10h 40mLHR-DUB
£249
8/5Wed
multi-stopAir France
14h 00mDUB-LHR
15/5Wed
multi-stopAir France
10h 40mLHR-DUB
£261
9/5Thu
multi-stopScandinavian Airlines
6h 10mDUB-LHR
11/5Sat
multi-stopScandinavian Airlines
7h 25mLHR-DUB
£299

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