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Cheap flights from London Heathrow Airport to Dublin from £42

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 Dublin departing on 2/1. 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 Dublin (LHR-DUB)

Cheap return flights

British Airways Logo
06:20 - 07:45LHR-DUB
1h 25mdirect
British Airways Logo
10:50 - 12:30DUB-LHR
1h 40mdirect
£72British Airways
Find Deal
Fri, 19 Sep - Wed, 24 Sep
British Airways Logo
08:25 - 09:50LHR-DUB
1h 25mdirect
British Airways Logo
13:25 - 14:50DUB-LHR
1h 25mdirect
£73British Airways
Find Deal
Sun, 11 Jan - Tue, 20 Jan
British Airways Logo
06:20 - 07:45LHR-DUB
1h 25mdirect
British Airways Logo
08:35 - 10:10DUB-LHR
1h 35mdirect
£74British Airways
Find Deal
Thu, 25 Sep - Thu, 2 Oct
British Airways Logo
15:40 - 17:05LHR-DUB
1h 25mdirect
British Airways Logo
10:55 - 12:30DUB-LHR
1h 35mdirect
£74British Airways
Find Deal
Wed, 10 Sep - Wed, 24 Sep
British Airways Logo
12:45 - 14:15LHR-DUB
1h 30mdirect
British Airways Logo
10:55 - 12:30DUB-LHR
1h 35mdirect
£75British Airways
Find Deal
Sun, 8 Feb - Tue, 10 Feb
British Airways Logo
16:30 - 18:00LHR-DUB
1h 30mdirect
British Airways Logo
08:35 - 10:10DUB-LHR
1h 35mdirect
£76British Airways
Find Deal
Thu, 25 Sep - Thu, 2 Oct
British Airways Logo
16:30 - 18:00LHR-DUB
1h 30mdirect
British Airways Logo
08:35 - 10:10DUB-LHR
1h 35mdirect
£76British Airways
Find Deal
Thu, 25 Sep - Thu, 2 Oct
British Airways Logo
18:25 - 19:50LHR-DUB
1h 25mdirect
British Airways Logo
10:55 - 12:30DUB-LHR
1h 35mdirect
£77British Airways
Find Deal
Fri, 6 Feb - Tue, 10 Feb
Aer Lingus Logo
15:10 - 16:35LHR-DUB
1h 25mdirect
Aer Lingus Logo
18:00 - 19:25DUB-LHR
1h 25mdirect
£97Aer Lingus
Find Deal
Wed, 3 Sep - Sat, 13 Sep
Logo
16:30 - 18:00LHR-DUB
1h 30mdirect
Logo
07:30 - 09:05DUB-LHR
1h 35mdirect
£105
Find Deal
Thu, 11 Sep - Sun, 14 Sep

British Airways flights from London Heathrow Airport to Dublin

Our best British Airways deals on London Heathrow Airport to Dublin flight tickets
British Airways
19 Sept
LHR06:20London Heathrow
1h 25m
DUB07:45Dublin
24 Sept
DUB10:50Dublin
1h 40m
LHR12:30London Heathrow
£72
Find similar
British Airways
11 Jan
LHR08:25London Heathrow
1h 25m
DUB09:50Dublin
20 Jan
DUB13:25Dublin
1h 25m
LHR14:50London Heathrow
£73
Find similar
British Airways
25 Sept
LHR06:20London Heathrow
1h 25m
DUB07:45Dublin
2 Oct
DUB08:35Dublin
1h 35m
LHR10:10London Heathrow
£74
Find similar

Aer Lingus flights from London Heathrow Airport to Dublin

Our best Aer Lingus deals on London Heathrow Airport to Dublin flight tickets
Aer Lingus
3 Sept
LHR15:10London Heathrow
1h 25m
DUB16:35Dublin
13 Sept
DUB18:00Dublin
1h 25m
LHR19:25London Heathrow
£97
Find similar
Aer Lingus
18 Aug
LHR16:50London Heathrow
1h 25m
DUB18:15Dublin
17 Sept
DUB12:30Dublin
1h 25m
LHR13:55London Heathrow
£135
Find similar
Aer Lingus
18 Aug
LHR15:50London Heathrow
1h 25m
DUB17:15Dublin
16 Sept
DUB13:30Dublin
1h 25m
LHR14:55London Heathrow
£136
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Dublin 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 13 August 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Dublin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Fri 19/9

06:20-07:45

Nonstop1h 25m

Dublin

Wed 24/9

10:50-12:30

Nonstop1h 40m

£72

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sun 11/1

08:25-09:50

Nonstop1h 25m

Dublin

Tue 20/1

13:25-14:50

Nonstop1h 25m

£73

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 25/9

06:20-07:45

Nonstop1h 25m

Dublin

Thu 2/10

08:35-10:10

Nonstop1h 35m

£74

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Wed 10/9

15:40-17:05

Nonstop1h 25m

Dublin

Wed 24/9

10:55-12:30

Nonstop1h 35m

£74

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sun 8/2

12:45-14:15

Nonstop1h 30m

Dublin

Tue 10/2

10:55-12:30

Nonstop1h 35m

£75

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 25/9

16:30-18:00

Nonstop1h 30m

Dublin

Thu 2/10

08:35-10:10

Nonstop1h 35m

£76

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 25/9

16:30-18:00

Nonstop1h 30m

Dublin

Thu 2/10

08:35-10:10

Nonstop1h 35m

£76

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Fri 6/2

18:25-19:50

Nonstop1h 25m

Dublin

Tue 10/2

10:55-12:30

Nonstop1h 35m

£77

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Wed 3/9

15:10-16:35

Nonstop1h 25m

Dublin

Sat 13/9

18:00-19:25

Nonstop1h 25m

£97

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 11/9

16:30-18:00

Nonstop1h 30m

Dublin

Sun 14/9

07:30-09:05

Nonstop1h 35m

£105

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Dublin from

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

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 typical price of a round-trip flight between London Heathrow Airport and Dublin?

What is the cheapest month to fly to Dublin?

In general, January is the cheapest month to fly from London Heathrow Airport to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £105. If you aren’t able to travel to Dublin during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of £110.

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

On average, the least expensive day to fly to Dublin from London Heathrow Airport is on a Saturday. momondo users have found tickets for Saturday departures for as low as £96. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around £128. These prices are subject to change though, so be sure to set up a Price Alert for flights to Dublin.

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

Flying to Dublin from London Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as £86 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £118 on average. Flights to Dublin from London Heathrow Airport in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest London Heathrow to Dublin flight route?

Fly from London Heathrow to Dublin for the best London Heathrow - Dublin flight prices

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

You are more likely to see cheaper flights to Dublin from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around £124 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from London Heathrow Airport for as low as £91 on momondo.

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

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

How have London Heathrow Airport to Dublin flight prices changed over time?

As of August 2025, prices for London Heathrow Airport to Dublin flights are approximately 47% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Dublin

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Dublin according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Dublin (LHR to DUB) flight deals and tips

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

Best price found

£42

Fastest flight time

1h 20m

Direct flights

Every day

Airports in Dublin

1 airport
The best one-way flight to Dublin from London Heathrow Airport in the past 72 hours is £42. The best return flight deal from London Heathrow Airport to Dublin found on momondo in the last 72 hours is £72.
The fastest flight from London Heathrow Airport to Dublin takes 1h 20m
Direct flights go from London Heathrow Airport to Dublin every day.
There is 1 airport near Dublin: Dublin (DUB)
Search flight deals

  • How far is London Heathrow to Dublin by plane?

    London Heathrow and Dublin are 276.5 mi apart from one another. 1h 20m is a normal flight duration for this route.

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

    Prices for flights from London Heathrow Airport to Dublin Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Dublin Airport.

  • What documentation or ID do you need to fly to Dublin Airport?

    The necessary travel and health documents for your Dublin Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

  • What is the most popular airline from London Heathrow Airport to Dublin?

Best airlines flying from London Heathrow Airport to Dublin

Compare and see reviews for airlines that fly from London Heathrow Airport to Dublin with momondo
Airline
Rating
Free Cancellation
Price
RyanairPriceFrom £26Free CancellationRating
6.8
5,153 reviews
Search Ryanair flights
British AirwaysPriceFrom £64Free CancellationRating
6.6
7,265 reviews
Search British Airways flights
Aer LingusPriceFrom £101Free CancellationRating
7.1
1,210 reviews
Search Aer Lingus flights
KLMPriceFrom £134Free CancellationRating
7.8
1,381 reviews
Search KLM flights

  • Aer Lingus Flights From London Heathrow Airport to Dublin

    Aer Lingus flies from London Heathrow Airport to Dublin around 90 times per week, with 1,210 momondo users rating the airline 7.1/10. The cheapest Aer Lingus deal from London Heathrow Airport to Dublin in the last 72 hours was £136 (round-trip), much lower than the average airfare cost of £195 for Aer Lingus flights on this route.

  • British Airways Flights From London Heathrow Airport to Dublin

    £87 is the best British Airways flight deal from London Heathrow Airport to Dublin found on momondo over the last 72 hours. The average British Airways ticket price found was closer to £145, however, with flight time and availability significantly affecting the price. British Airways (6.6/10 from 7,265 user reviews) flies into Dublin from London Heathrow Airport 88 times in an average week so prices can vary.

Travelling to a place near Dublin?

Book flights to Dublin if you plan to visit one of these locations
Swords
Kilkenny
Dundalk
Bray
Cavan
Athlone
Carlingford
Malahide
Kildare
Wicklow
Drogheda
Enniscorthy
Gorey
Mullingar
Arklow
Portmarnock
Naas
Tullamore
Leixlip
Maynooth

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Dublin from London.

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

Yes. momondo enables you to select and highlight flights to Dublin from London with this policy.

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

momondo provides multiple filters to help you find the best flight to Dublin from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

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

An easier way to manage your Dublin trip

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