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.

Which airlines fly most frequently between London Heathrow Airport and Ireland?

London Heathrow Airport and Ireland are connected by different airlines. The airlines that fly that route the most regularly are British Airways (186 flights per week), Aer Lingus (179 flights per week), and Qatar Airways (156 flights per week).

Which cabin class options are there for flights between London Heathrow Airport and Ireland?

There is only one cabin class option available for the route, which is Economy . Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Which airlines provide the cheapest flights from London Heathrow Airport to Ireland?

In the past 5 days, the cheapest return tickets from London Heathrow Airport to Ireland were found on Aer Lingus (€90) and British Airways (€102).

Which airlines fly direc between London Heathrow Airport and Ireland?

There is just one airline that flies from London Heathrow Airport to Ireland direct and that is British Airways . The best return deal found from British Airways for the route is to Dublin (DUB) and costs €105.

What’s the earliest departure time from London Heathrow Airport to Ireland?

The earliest flight from London Heathrow Airport to Ireland departs at 06:15 , landing in Dublin at 07:40.

How many flights are there between London Heathrow Airport and Ireland per day?

Each day, there are between 22 and 28 direct flights that take off from London Heathrow Airport and land in Ireland, with an average flight time of 1h 25m. The most common departure time is 09:00 and most flights take off in the morning, while the most flights land at Dublin. Each week, there are 177 flights. The most frequent day of departure is Thursday, when 16% of all weekly flights depart. The fewest flights depart on a Saturday.

How long does a flight from London Heathrow Airport to Ireland take?

The duration of a flight to Ireland depends on your arrival airport. The shortest routes to Ireland from London Heathrow Airport are to Cork , which takes 1h 20m , Shannon , which takes 1h 20m, and Dublin , which takes 1h 20m.

What’s the latest departure time from London Heathrow Airport to Ireland?

If you prefer to fly at night, the last flight from London Heathrow Airport to Ireland sets off at 22:00 and lands in Dublin at 23:20.

€47 CHEAP FLIGHTS from London Heathrow to Ireland

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ReturnOne-way

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Shannon

1h 20mNonstop

from €75per person

Dublin

1h 20mNonstop

from €82per person

Knock

1h 30mNonstop

from €88per person

Cork

1h 20mNonstop

from €95per person

Milltown (Kerry)

3h 55m2 stops

from €163per person

Donegal

4h 10m2 stops

from €186per person

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Cheap Flights from Heathrow to Ireland

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Last minute

Direct

Recent return flight deals from Heathrow to Ireland

Wed, 25 Nov - Sat, 28 Nov

18:25 - 19:45LHR London Heathrow-DUB Dublin

1h 20mdirect

16:10 - 17:35DUB Dublin-LHR London Heathrow

1h 25mdirect

€82British Airways

Tue, 6 Oct - Wed, 21 Oct

14:40 - 16:10LHR London Heathrow-SNN Shannon

1h 30mdirect

16:50 - 18:20SNN Shannon-LHR London Heathrow

1h 30mdirect

€82Aer Lingus

Wed, 7 Oct - Thu, 22 Oct

19:10 - 20:35LHR London Heathrow-SNN Shannon

1h 25mdirect

21:15 - 22:40SNN Shannon-LHR London Heathrow

1h 25mdirect

€83Aer Lingus

Mon, 5 Oct - Wed, 21 Oct

14:40 - 16:10LHR London Heathrow-SNN Shannon

1h 30mdirect

07:30 - 09:05SNN Shannon-LHR London Heathrow

1h 35mdirect

€84Aer Lingus

Fri, 6 Nov - Mon, 16 Nov

15:15 - 16:45LHR London Heathrow-SNN Shannon

1h 30mdirect

17:30 - 18:55SNN Shannon-LHR London Heathrow

1h 25mdirect

€87Aer Lingus

Wed, 7 Oct - Wed, 14 Oct

14:40 - 16:10LHR London Heathrow-SNN Shannon

1h 30mdirect

21:15 - 22:40SNN Shannon-LHR London Heathrow

1h 25mdirect

€88Aer Lingus

Fri, 2 Oct - Thu, 22 Oct

11:05 - 12:35LHR London Heathrow-NOC Knock Intl

1h 30mdirect

13:05 - 14:30NOC Knock Intl-LHR London Heathrow

1h 25mdirect

€88Aer Lingus

Sun, 4 Oct - Sun, 11 Oct

09:50 - 11:20LHR London Heathrow-SNN Shannon

1h 30mdirect

21:15 - 22:40SNN Shannon-LHR London Heathrow

1h 25mdirect

€89Aer Lingus

Thu, 22 Oct - Thu, 29 Oct

06:20 - 07:45LHR London Heathrow-DUB Dublin

1h 25mdirect

08:50 - 10:20DUB Dublin-LHR London Heathrow

1h 30mdirect

€89British Airways

Sun, 4 Oct - Sun, 11 Oct

09:50 - 11:20LHR London Heathrow-SNN Shannon

1h 30mdirect

21:15 - 22:40SNN Shannon-LHR London Heathrow

1h 25mdirect

€89Aer Lingus

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.

Prices

Airlines

What is the cheapest London Heathrow Airport to Ireland flight route?

The cheapest ticket to Ireland from London Heathrow Airport found in the last 5 days was to Dublin, at €202 return. The most popular route is from London Heathrow Airport (LHR) to Dublin (DUB), and the cheapest return airline ticket found on this route in the last 5 days was €202.

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

The cheapest time of day to fly to Ireland is generally at night, when retur flights cost €153 on average. Morning departures are around 37% cheaper than evening flights, on average. The most expensive time of day to fly to Ireland is generally in the evening, which is peak travel time and where the average cost of a ticket is €270.

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

The cheapest month for flights from London Heathrow Airport to Ireland is January, when tickets cost €132 (return) on average. On the other hand, the most expensive months are July and May, when the average cost of return tickets is €174 and €170 respectively.

What’s the cheapest day of the week to fly from London Heathrow Airport to Ireland?

For London Heathrow Airport to Ireland, Thursday 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 Sunday being the most expensive.

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

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 33% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Find deals

Low season	January
High season	August
Cheapest flight	€47

Best time to beat the crowds (16% less expensive on average)

Most popular time to fly (7% more expensive on average)

Flight from London Heathrow Airport to Dublin

DeborahFlew with Aer Lingus-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-Jun 2025

If you’re doing a transfer speak to someone at the desk don’t use an automated kiosk

ThomasFlew with Aer Lingus-Oct 2024

You will likely have to walk a lot more than you might expect to make a connection.

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.

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 €128 one-way - €219 round-trip

6.7

British AirwaysOverall score based on 8210 reviews

6.5Entertainment

6.8Comfort

7.0Boarding

7.7Crew

6.4Food

Airline reviews

I have a walker I need it to get from the plane to customs and baggage claim. It had a huge orange tag on it saying it should be given to me as I got off the plane. It was not and the flight staff didn’t know where it was—both on my flight to London and on the return. In It was very frustrating

8.0 ExcellentAnonymous, Sept 2026

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€47 Find Cheap Flights from London Heathrow Airport to Ireland – Compare and Save

Best Ireland Flight Deals from Heathrow

Cheap Flights from Heathrow to Ireland

Recent return flight deals from Heathrow to Ireland

Recent one-way flight deals from Heathrow to Ireland

Recent last minute flight deals from Heathrow to Ireland

Recent direct flight deals from Heathrow to Ireland

KAYAK's insights & trends for Heathrow to Ireland flights

What is the cheapest London Heathrow Airport to Ireland flight route?

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

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

What’s the cheapest day of the week to fly from London Heathrow Airport to Ireland?

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

Which airlines fly direc between London Heathrow Airport and Ireland?

Which airlines fly most frequently between London Heathrow Airport and Ireland?

Which airlines provide the cheapest flights from London Heathrow Airport to Ireland?

How long does a flight from London Heathrow Airport to Ireland take?

Which cabin class options are there for flights between London Heathrow Airport and Ireland?

How many flights are there between London Heathrow Airport and Ireland per day?

What’s the earliest departure time from London Heathrow Airport to Ireland?

What’s the latest departure time from London Heathrow Airport to Ireland?

Good to know

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Flights from Heathrow to Ireland: the best tips from KAYAK users

FAQs - booking Ireland flights

Top tips for finding cheap flights to Ireland

Reviews of the top airline flying from Heathrow to Ireland

More options for your flight from Heathrow to Ireland

Complete your trip to Ireland with a hotel stay or car hire

Information on your arrival and departure airports

Cabin class types available on flights to Ireland

Flights from domestic origins to Ireland

Flights to other popular destinations

Flights from Heathrow to popular regions in Ireland

Flights to popular cities in Ireland

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