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Cheap flights from London Heathrow Airport to Dublin from £40

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London Heathrow to Dublin are usually found in January or October, booked 87 days in advance, depart on a Friday or Saturday and return on a Friday

Cheap flight deals from Heathrow to Dublin

Enter your travel dates to find the best prices.

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 12 December 2025.

Mon 29/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Mon 5/117:55DUB - LHR
Nonstop1h 20mBritish Airways
Deal found 10/12£83
Tue 30/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Tue 6/108:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 9/12£91
Tue 16/1215:35LHR - DUB
Nonstop1h 30mBritish Airways
Tue 27/118:00DUB - LHR
Nonstop1h 20mBritish Airways
Deal found 11/12£93
Sun 28/1218:20LHR - DUB
Nonstop1h 25mBritish Airways
Mon 5/117:55DUB - LHR
Nonstop1h 20mBritish Airways
Deal found 10/12£94
Mon 15/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Tue 23/1208:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 11/12£102
Wed 24/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Wed 28/108:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 11/12£102
Wed 31/1218:15LHR - DUB
Nonstop1h 25mMultiple Airlines
Thu 1/107:35DUB - LHR
Nonstop1h 30mMultiple Airlines
Deal found 11/12£108
Mon 29/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Thu 1/108:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 10/12£111
Wed 31/1218:15LHR - DUB
Nonstop1h 25mBritish Airways
Thu 1/120:40DUB - LHR
Nonstop1h 20mBritish Airways
Deal found 10/12£112
Fri 26/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Fri 26/1216:00DUB - LHR
Nonstop1h 25mBritish Airways
Deal found 11/12£119

Find 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 12 December 2025.

Round-trip from

£60

One-way from

£40

Popular in

December

Cheapest in

January

Average price

£149

Good round-trip deal

£190 or less

Good one-way deal

£198 or less
British Airways
  • British Airways
  • 22/1-25/1
  • Nonstop
  • 2h 50m total
  • London to Dublin
Search Deals
British Airways
  • British Airways
  • 10/2
  • Nonstop
  • 1h 30m total
  • London to Dublin
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to Dublin.
Search Deals
Price to beat on a one-way flight from London Heathrow to Dublin.
Search Deals

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 12 December 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

Sat 17/1

13:35-15:05

Nonstop1h 30m

Dublin

Mon 19/1

13:00-14:25

Nonstop1h 25m

£72

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Fri 16/1

06:30-07:55

Nonstop1h 25m

Dublin

Mon 19/1

17:55-19:15

Nonstop1h 20m

£73

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Wed 28/1

15:30-17:00

Nonstop1h 30m

Dublin

Sat 31/1

20:40-22:00

Nonstop1h 20m

£75

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Tue 27/1

18:15-19:40

Nonstop1h 25m

Dublin

Thu 29/1

20:40-22:00

Nonstop1h 20m

£75

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Mon 26/1

15:20-16:50

Nonstop1h 30m

Dublin

Wed 28/1

08:50-10:25

Nonstop1h 35m

£75

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Fri 23/1

06:30-07:55

Nonstop1h 25m

Dublin

Sun 25/1

20:40-22:00

Nonstop1h 20m

£76

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Tue 13/1

15:35-17:05

Nonstop1h 30m

Dublin

Thu 15/1

08:50-10:25

Nonstop1h 35m

£81

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 14/3

18:25-19:50

Nonstop1h 25m

Dublin

Mon 16/3

16:00-17:25

Nonstop1h 25m

£87

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Fri 13/2

06:30-07:55

Nonstop1h 25m

Dublin

Sun 15/2

20:40-22:00

Nonstop1h 20m

£91

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Thu 12/3

06:30-07:55

Nonstop1h 25m

Dublin

Mon 16/3

20:40-22:00

Nonstop1h 20m

£99

Flights are sorted by cheapest return flights first.

Deals found on 11/12

Showing 1-10 of 22 results
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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 5 December 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 87 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Dublin (average of £65). Flying from London Heathrow Airport to Dublin in August is currently the most expensive (average of £80). 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 12 December 2025.

It’s optimal to fly from London Heathrow Airport to Dublin in the afternoon. By choosing this option you can save up to 72% 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 6 December 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Dublin flight should consider departing on Tuesday 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 12 December 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
1,394 reviews
Check prices

Comfort

7.1

Boarding

7.4

Food

6.6

Crew

8.0

Entertainment

7.0

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
Aer Lingus
7.2
Good
1,394 reviews
Aer Lingus
7.2
Good
1,394 reviews
Check prices

Comfort

7.1

Boarding

7.4

Food

6.6

Crew

8.0

Entertainment

7.0

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
Ryanair
6.8
Okay
5,218 reviews
Aer Lingus
7.2
Good
1,394 reviews
Check prices

Comfort

7.1

Boarding

7.4

Food

6.6

Crew

8.0

Entertainment

7.0

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
British Airways
6.7
Okay
7,571 reviews
Aer Lingus
7.2
Good
1,394 reviews
Check prices

Comfort

7.1

Boarding

7.4

Food

6.6

Crew

8.0

Entertainment

7.0

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.

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 43 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 30m. 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 £30 on this airline. Additional options worth looking into are British Airways and Aer Lingus, starting at £69 and £96 round-trip. Ryanair is currently priced 76% 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: Kenya Airways (80%), LATAM Airlines (79%), Air Canada( 77%).

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

    Looking at all options, your cheapest flight can be booked for £64. While the most popular route (London Heathrow - Dublin) can be booked for £69 on average, our data indicates £374 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Dublin (average of £65). Flying from London Heathrow Airport to Dublin in August is currently the most expensive (average of £80). 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
Athlone
Wicklow
Cavan
Tullamore
Arklow
Drogheda
Malahide
Portmarnock
Dundalk
Enniscorthy
Mullingar
Bray
Kildare
Maynooth
Carlingford
Swords
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 12 December 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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£31Average£67FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£69Average£110FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£98Average£148FlexibilityNo 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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