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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 Cheapflights user in the last 72 hours by searching for a flight departing on 13/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
7 Sep — 14 Sep1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Dublin are usually found in January or February, booked 66 days in advance, depart on a Friday or Saturday and return on a Friday

Cheap flight deals from Heathrow to Dublin

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Dublin (DUB). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 September 2025.

Round-trip from

£69

One-way from

£42

Popular in

June

Cheapest in

January

Average price

£113

Good round-trip deal

£153 or less

Good one-way deal

£136 or less
British Airways
  • British Airways
  • 18/1-24/1
  • Nonstop
  • 2h 55m total
  • London to Dublin
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British Airways
  • British Airways
  • 13/1
  • Nonstop
  • 1h 25m total
  • London to Dublin
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£7 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£2 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from London Heathrow to Dublin.
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Price to beat on a one-way flight from London Heathrow to Dublin.
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Find flight deals from Heathrow to Dublin

Cheapest flights from Heathrow to Dublin
Explore the most affordable flight options available from Heathrow to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 September 2025.

Sat 11/1006:15LHR - DUB
Nonstop1h 25mBritish Airways
Mon 13/1011:05DUB - LHR
Nonstop1h 30mBritish Airways
Deal found 31/8£69
Sat 15/1108:35LHR - DUB
Nonstop1h 25mBritish Airways
Tue 18/1118:00DUB - LHR
Nonstop1h 20mBritish Airways
Deal found 2/9£70
Wed 15/1006:15LHR - DUB
Nonstop1h 25mBritish Airways
Wed 22/1010:55DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 30/8£71
Wed 1/1016:30LHR - DUB
Nonstop1h 25mBritish Airways
Wed 8/1010:55DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 31/8£72
Wed 12/1106:30LHR - DUB
Nonstop1h 25mBritish Airways
Wed 19/1108:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 2/9£73
Thu 2/1016:10LHR - DUB
Nonstop1h 20mBritish Airways
Thu 9/1010:40DUB - LHR
Nonstop1h 30mBritish Airways
Deal found 1/9£74
Thu 2/1016:10LHR - DUB
Nonstop1h 20mBritish Airways
Wed 22/1010:50DUB - LHR
Nonstop1h 40mBritish Airways
Deal found 2/9£75
Thu 20/1115:30LHR - DUB
Nonstop1h 30mBritish Airways
Mon 24/1108:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 2/9£75
Tue 7/1016:50LHR - DUB
Nonstop1h 30mBritish Airways
Wed 15/1010:50DUB - LHR
Nonstop1h 40mBritish Airways
Deal found 31/8£76
Fri 10/1006:20LHR - DUB
Nonstop1h 25mBritish Airways
Mon 13/1008:45DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 2/9£78

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 2 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Dublin that are best for you.

Fly from

Heathrow

Fly to

Dublin

Route

Depart

Return

Price

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sun 25/1

13:25-15:00

Nonstop1h 35m

Dublin

Sat 31/1

15:10-16:35

Nonstop1h 25m

£70

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 13/11

06:30-07:55

Nonstop1h 25m

Dublin

Sat 15/11

15:10-16:35

Nonstop1h 25m

£71

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Wed 15/10

06:15-07:40

Nonstop1h 25m

Dublin

Wed 22/10

10:55-12:30

Nonstop1h 35m

£71

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 6/12

08:35-10:00

Nonstop1h 25m

Dublin

Sat 6/12

16:05-17:30

Nonstop1h 25m

£71

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 1/11

18:25-19:50

Nonstop1h 25m

Dublin

Tue 4/11

10:55-12:30

Nonstop1h 35m

£72

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 11/10

06:15-07:40

Nonstop1h 25m

Dublin

Mon 13/10

11:05-12:35

Nonstop1h 30m

£72

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Tue 18/11

06:30-07:55

Nonstop1h 25m

Dublin

Sat 22/11

13:10-14:35

Nonstop1h 25m

£73

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 27/12

06:30-07:55

Nonstop1h 25m

Dublin

Mon 19/1

13:00-14:25

Nonstop1h 25m

£73

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Wed 12/11

15:30-17:00

Nonstop1h 30m

Dublin

Wed 19/11

08:50-10:25

Nonstop1h 35m

£73

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Tue 20/1

08:25-09:50

Nonstop1h 25m

£42

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Showing 1-10 of 20 results
1
2

Best time to book a flight from Heathrow to Dublin

Have a flexible travel schedule? Discover the best time to fly to Dublin from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Dublin

How far ahead should I book a flight from London Heathrow Airport to Dublin?

Use this chart to determine the optimal time to book a return flight from Heathrow to Dublin. Price data was last updated on 29 August 2025.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Dublin, you should look to book at least 66 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to Dublin?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Dublin (average of £71). Flying from London Heathrow Airport to Dublin in August is currently the most expensive (average of £94). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to DUB?

Find hourly flight availability from Heathrow to Dublin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 September 2025.

It’s optimal to fly from London Heathrow Airport to Dublin in the afternoon. By choosing this option you can save up to 74% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from London Heathrow Airport to Dublin?

Use this chart to determine the cheapest time to fly return from Heathrow to Dublin. Price data was last updated on 31 August 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Dublin flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost for a return flight from London Heathrow Airport to Dublin?

Reviews of airlines servicing Dublin

Get insights into the airlines that provide service to Dublin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dublin. Reviews last updated 2 September 2025.
Check out reviews from past customers who have flown with Aer Lingus, Ryanair, andBritish Airways from London Heathrow Airport to Dublin to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,247 reviews
Check prices

Crew

8.0

Entertainment

6.9

Boarding

7.3

Overall

7.2

Food

6.5

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Aer Lingus
7.2
Good
1,247 reviews
Aer Lingus
7.2
Good
1,247 reviews
Check prices

Crew

8.0

Entertainment

6.9

Boarding

7.3

Overall

7.2

Food

6.5

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Ryanair
6.8
Okay
5,157 reviews
Aer Lingus
7.2
Good
1,247 reviews
Check prices

Crew

8.0

Entertainment

6.9

Boarding

7.3

Overall

7.2

Food

6.5

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
British Airways
6.7
Okay
7,344 reviews
Aer Lingus
7.2
Good
1,247 reviews
Check prices

Crew

8.0

Entertainment

6.9

Boarding

7.3

Overall

7.2

Food

6.5

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Dublin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Dublin from London Heathrow?

    If you book a flight to Dublin from London Heathrow, you will be flying to Dublin, which is the city’s only airport. Dublin (DUB) is located 5.7 mi from the center of Dublin. There are 48 flights from London Heathrow to Dublin per day from 3 different airlines.

  • How long is the flight from London Heathrow Airport to Dublin?

    Departing from London Heathrow Airport to Dublin will take you 1h 35m. Airlines will cover a distance of 279 mi. Generally, flights for this route are direct.

  • What are the cheapest airlines flying from London Heathrow Airport to Dublin round-trip?

    Our cheapest airline available from London Heathrow Airport to Dublin is Ryanair. Our recent data shows that you can find tickets from as low as £26 on this airline. Additional options worth looking into are British Airways and Aer Lingus, starting at £65 and £101 round-trip. Ryanair is currently priced 79% below the average price you’ll pay for this route.

  • What are the most reliable airlines from London Heathrow Airport to Dublin?

    Before booking your flight to Dublin from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: Air Canada (85%), LATAM Airlines (79%), Qatar Airways( 77%).

  • What are the cheapest flights from London Heathrow Airport to Dublin?

    Looking at all options, your cheapest flight can be booked for £73. While the most popular route (London Heathrow - Dublin) can be booked for £69 on average our data indicates £612 when flying from London Heathrow Airport to Dublin.

  • Can I find deals for flights from Heathrow to Dublin that include hotel bookings?

    Yes. In addition to deals on Heathrow to Dublin flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Dublin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Dublin.

  • Can I find deals for business class flights from Heathrow to Dublin?

    Yes. Cheapflights offers flight deals from Heathrow to Dublin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Dublin?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Dublin (average of £71). Flying from London Heathrow Airport to Dublin in August is currently the most expensive (average of £94). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Dublin?

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

Browse thousands of different options on Cheapflights for your next trip

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Fly from Heathrow to Dublin on these airlines

Choose from the following airlines for your flight from Heathrow to Dublin. Flights are based on user searches made on Cheapflights and were last updated on 2 September 2025.
British Airways flights from London Heathrow to Dublin
Aer Lingus flights from London Heathrow to Dublin
Ryanair flights from London Heathrow to Dublin

Top 3 airlines flying from Heathrow to Dublin

Discover the top 3 airlines that operate flights from Heathrow to Dublin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 September 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£26Average£58FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£65Average£107FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£101Average£145FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Dublin?

Cheapflights helps you search for flights from Heathrow to Dublin via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Dublin?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Dublin for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Dublin with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Dublin, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Dublin become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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