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Cheap flights from London Heathrow Airport to Ireland from £39

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Ireland departing on 1/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Heathrow Airport to Ireland

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
06:30 - 07:55LHR-DUB
1h 25mdirect
British Airways Logo
10:45 - 12:20DUB-LHR
1h 35mdirect
£68British Airways
Find Deal
Thu, 11 Dec - Sun, 14 Dec
British Airways Logo
15:30 - 17:00LHR-DUB
1h 30mdirect
British Airways Logo
10:45 - 12:20DUB-LHR
1h 35mdirect
£69British Airways
Find Deal
Thu, 11 Dec - Sun, 14 Dec
British Airways Logo
06:30 - 07:55LHR-DUB
1h 25mdirect
British Airways Logo
08:50 - 10:25DUB-LHR
1h 35mdirect
£70British Airways
Find Deal
Sat, 29 Nov - Mon, 1 Dec
British Airways Logo
15:30 - 17:00LHR-DUB
1h 30mdirect
British Airways Logo
20:40 - 22:00DUB-LHR
1h 20mdirect
£71British Airways
Find Deal
Sat, 29 Nov - Sat, 6 Dec
Multiple Airlines Logo
18:45 - 20:05LHR-DUB
1h 20mdirect
Multiple Airlines Logo
20:40 - 22:00DUB-LHR
1h 20mdirect
£90Multiple Airlines
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Fri, 5 Dec - Tue, 16 Dec
Aer Lingus Logo
10:55 - 12:25LHR-NOC
1h 30mdirect
Aer Lingus Logo
13:00 - 14:30NOC-LHR
1h 30mdirect
£91Aer Lingus
Find Deal
Fri, 28 Nov - Wed, 3 Dec
Aer Lingus Logo
14:15 - 15:45LHR-SNN
1h 30mdirect
Aer Lingus Logo
20:05 - 21:25SNN-LHR
1h 20mdirect
£92Aer Lingus
Find Deal
Sat, 29 Nov - Thu, 4 Dec
Multiple Airlines Logo
15:30 - 17:00LHR-DUB
1h 30mdirect
Multiple Airlines Logo
19:45 - 21:05DUB-LHR
1h 20mdirect
£103Multiple Airlines
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Sat, 22 Nov - Tue, 25 Nov
KLM Logo
08:40 - 16:45LHR-ORK
8h 05m1 stop
KLM Logo
06:00 - 13:50ORK-LHR
7h 50m1 stop
£148KLM
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Sat, 15 Nov - Wed, 19 Nov
KLM Logo
17:50 - 23:25LHR-ORK
5h 35m1 stop
KLM Logo
06:00 - 10:45ORK-LHR
4h 45m1 stop
£150KLM
Find Deal
Fri, 28 Nov - Tue, 2 Dec

British Airways flights from London Heathrow Airport to Ireland

Our best British Airways deals on London Heathrow Airport to Ireland flight tickets
British Airways
11 Dec
LHR06:30London Heathrow
1h 25m
DUB07:55Dublin
14 Dec
DUB10:45Dublin
1h 35m
LHR12:20London Heathrow
£68
Find similar
British Airways
11 Dec
LHR15:30London Heathrow
1h 30m
DUB17:00Dublin
14 Dec
DUB10:45Dublin
1h 35m
LHR12:20London Heathrow
£69
Find similar
British Airways
29 Nov
LHR06:30London Heathrow
1h 25m
DUB07:55Dublin
1 Dec
DUB08:50Dublin
1h 35m
LHR10:25London Heathrow
£70
Find similar

Aer Lingus flights from London Heathrow Airport to Ireland

Our best Aer Lingus deals on London Heathrow Airport to Ireland flight tickets
Aer Lingus
4 Nov
LHR10:55London Heathrow
1h 30m
NOC12:25Knock Intl
6 Nov
NOC13:00Knock Intl
1h 30m
LHR14:30London Heathrow
£90
Find similar
Aer Lingus
28 Nov
LHR10:55London Heathrow
1h 30m
NOC12:25Knock Intl
3 Dec
NOC13:00Knock Intl
1h 30m
LHR14:30London Heathrow
£91
Find similar
Aer Lingus
29 Nov
LHR14:15London Heathrow
1h 30m
SNN15:45Shannon
4 Dec
SNN20:05Shannon
1h 20m
LHR21:25London Heathrow
£92
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 31 October 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 11/12

06:30-07:55

Nonstop1h 25m

Dublin

Sun 14/12

10:45-12:20

Nonstop1h 35m

£68

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 11/12

15:30-17:00

Nonstop1h 30m

Dublin

Sun 14/12

10:45-12:20

Nonstop1h 35m

£69

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 29/11

06:30-07:55

Nonstop1h 25m

Dublin

Mon 1/12

08:50-10:25

Nonstop1h 35m

£70

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 29/11

15:30-17:00

Nonstop1h 30m

Dublin

Sat 6/12

20:40-22:00

Nonstop1h 20m

£71

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Fri 5/12

18:45-20:05

Nonstop1h 20m

Dublin

Tue 16/12

20:40-22:00

Nonstop1h 20m

£90

LondonKnock

LHR - NOC

LHRNOC

London Heathrow

Fri 28/11

10:55-12:25

Nonstop1h 30m

Knock Intl

Wed 3/12

13:00-14:30

Nonstop1h 30m

£91

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Sat 29/11

14:15-15:45

Nonstop1h 30m

Shannon

Thu 4/12

20:05-21:25

Nonstop1h 20m

£92

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 22/11

15:30-17:00

Nonstop1h 30m

Dublin

Tue 25/11

19:45-21:05

Nonstop1h 20m

£103

LondonCork

LHR - ORK

LHRORK

London Heathrow

Sat 15/11

08:40-16:45

1 stop8h 05m

Cork

Wed 19/11

06:00-13:50

1 stop7h 50m

£148

LondonCork

LHR - ORK

LHRORK

London Heathrow

Fri 28/11

17:50-23:25

1 stop5h 35m

Cork

Tue 2/12

06:00-10:45

1 stop4h 45m

£150

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Ireland from

How to get the cheapest flight ticket from London Heathrow Airport to Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Ireland?

The month of January is, on average, the cheapest month to fly to Ireland from London Heathrow Airport, with most prices found around £105. If you’re not able to fly to Ireland in January, then February is your next best option. Flight prices from London Heathrow Airport to Ireland during February average around £114.

What is the cheapest day to depart on your flight to Ireland?

The cheapest day to depart on your flight to Ireland is on a Friday when prices can be found for as low as £302. This is often the case because there is less demand to fly during this day of the week. Flights from London Heathrow Airport to Ireland on a Monday will generally be more expensive and average around £528. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ireland?

In the afternoon is the cheapest time of day to fly from London Heathrow Airport to Ireland when you can find flight prices for as low as £141. Flying to Ireland in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Ireland are more costly in the morning, with an average ticket price of £511. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest London Heathrow to Ireland flight route?

Fly from London Heathrow to Knock Intl for the best London Heathrow - Ireland flight prices

How far in advance should I book a flight to Ireland?

You are more likely to see cheaper flights to Ireland from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around £129 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from London Heathrow Airport for as low as £96 on momondo.

What cabin class options are available on London Heathrow to Ireland flights?

There are 3 cabin classes available to choose from on London Heathrow to Ireland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to Ireland flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Ireland.

Cheap London Heathrow Airport to Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Ireland

Best price found

£34

Fastest flight time

1h 20m

Direct flights

Every day

Airports in Ireland

2 airports
The best one-way flight to Ireland from London Heathrow Airport in the past 72 hours is £34. The best return flight deal from London Heathrow Airport to Ireland found on momondo in the last 72 hours is £118.
The fastest flight from London Heathrow Airport to Ireland takes 1h 20m
Direct flights go from London Heathrow Airport to Ireland every day.
There are 2 airports near Ireland: Dublin (DUB), Cork (ORK)
Search flight deals

  • When did momondo last update prices for flights from London Heathrow Airport to Ireland?

    Prices for flights from London Heathrow Airport to Ireland were last updated today.

  • How many operators does momondo search for flights from London Heathrow Airport to Ireland?

  • How old do you have to be to fly from London Heathrow Airport to Ireland?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Ireland.

  • What documentation or ID do you need to fly to Ireland?

    The travel and health documents you'll need for your trip to Ireland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ireland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from London Heathrow Airport to Ireland?

Best airlines flying from London Heathrow Airport to Ireland

Compare and see reviews for airlines that fly from London Heathrow Airport to Ireland with momondo
Airline
Rating
Free Cancellation
Price
RyanairPriceFrom £31Free CancellationRating
6.8
5,187 reviews
Search Ryanair flights
British AirwaysPriceFrom £69Free CancellationRating
6.7
7,487 reviews
Search British Airways flights
Aer LingusPriceFrom £80Free CancellationRating
7.2
1,361 reviews
Search Aer Lingus flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Ireland?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Ireland for you.

Can I find flights from London to Ireland with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ireland from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Ireland?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Ireland.

I’m not ready to book a flight from London to Ireland right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Ireland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ireland and let you know when they change.

An easier way to manage your Ireland trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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Find better results for your trip to Ireland

Popular Cities in Ireland

Popular flights according to clicks in the last 7 days on momondo
Flights to Dublinfrom £29
Flights to Corkfrom £29
Flights to Shannon, Clarefrom £29
Flights to Knockfrom £29
Flights to Milltown (Kerry)from £31
Flights to Donegalfrom £126