Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Ireland 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 16/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Heathrow to Ireland

Keep the following information in mind while searching for Heathrow to Ireland flight deals. Data was last updated 17 September 2025.

Round-trip from

£59

One-way from

£40

Popular in

December

Cheapest in

January

Average price

£53

Good round-trip deal

£98 or less

Good one-way deal

£46 or less
British Airways
  • British Airways
  • 3/11-10/11
  • Nonstop
  • 3h 00m total
  • London to Ireland
Search Deals
British Airways
  • British Airways
  • 16/11
  • Nonstop
  • 1h 30m total
  • London to Ireland
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£4 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to Ireland.
Search Deals
Price to beat on a one-way flight from London Heathrow to Ireland.
Search Deals

Find flight deals from Heathrow to Ireland

Cheapest flights from Heathrow to Ireland
Explore the most affordable flight options available from Heathrow to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Thu 30/1006:30LHR - DUB
Nonstop1h 25mBritish Airways
Thu 6/1118:00DUB - LHR
Nonstop1h 20mBritish Airways
Deal found 15/9£62
Tue 25/1106:30LHR - DUB
Nonstop1h 25mBritish Airways
Mon 1/1208:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 15/9£63
Wed 29/1006:30LHR - DUB
Nonstop1h 25mBritish Airways
Tue 4/1110:55DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 16/9£64
Sat 29/1113:35LHR - DUB
Nonstop1h 30mBritish Airways
Mon 1/1208:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 15/9£65
Wed 15/1015:40LHR - DUB
Nonstop1h 25mBritish Airways
Thu 16/1012:45DUB - LHR
Nonstop1h 30mBritish Airways
Deal found 15/9£66
Sat 8/1112:50LHR - DUB
Nonstop1h 30mBritish Airways
Tue 11/1108:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 15/9£67
Fri 17/1006:20LHR - DUB
Nonstop1h 25mBritish Airways
Mon 20/1010:30DUB - LHR
Nonstop1h 30mBritish Airways
Deal found 15/9£67
Thu 13/1115:30LHR - DUB
Nonstop1h 30mBritish Airways
Tue 18/1108:50DUB - LHR
Nonstop1h 35mBritish Airways
Deal found 16/9£69
Tue 14/1022:25LHR - ORK
Nonstop1h 20mAer Lingus
Tue 21/1020:30ORK - LHR
Nonstop1h 15mAer Lingus
Deal found 16/9£70
Mon 20/1020:10LHR - DUB
Nonstop1h 20mAer Lingus
Sat 1/1116:30DUB - LHR
Nonstop1h 20mAer Lingus
Deal found 15/9£71
Sun 19/1011:05LHR - NOC
Nonstop1h 30mAer Lingus
Thu 23/1013:05NOC - LHR
Nonstop1h 25mAer Lingus
Deal found 15/9£73
Mon 13/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Sat 18/1017:30SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 15/9£73

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 17 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Ireland that are best for you.

Fly from

Heathrow

Fly to

Ireland

Route

Depart

Return

Price

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Tue 20/1

06:30-07:55

Nonstop1h 25m

Dublin

Fri 23/1

18:15-19:35

Nonstop1h 20m

£65

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 29/11

15:30-17:00

Nonstop1h 30m

Dublin

Wed 3/12

13:10-14:35

Nonstop1h 25m

£65

LondonKnock

LHR - NOC

LHRNOC

London Heathrow

Sun 19/10

11:05-12:35

Nonstop1h 30m

Knock Intl

Thu 23/10

13:05-14:30

Nonstop1h 25m

£73

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Mon 5/1

06:30-07:55

Nonstop1h 25m

Dublin

Fri 16/1

18:15-19:35

Nonstop1h 20m

£73

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Tue 20/1

06:30-07:55

Nonstop1h 25m

Dublin

Sat 31/1

17:55-19:15

Nonstop1h 20m

£73

LondonKnock

LHR - NOC

LHRNOC

London Heathrow

Thu 16/10

11:05-12:35

Nonstop1h 30m

Knock Intl

Mon 20/10

13:05-14:30

Nonstop1h 25m

£73

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Mon 29/12

06:30-07:55

Nonstop1h 25m

Dublin

Thu 8/1

18:00-19:20

Nonstop1h 20m

£77

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Mon 29/12

06:30-07:55

Nonstop1h 25m

Dublin

Sun 11/1

20:40-22:00

Nonstop1h 20m

£77

LondonKnock

LHR - NOC

LHRNOC

London Heathrow

Mon 13/10

11:05-12:35

Nonstop1h 30m

Knock Intl

Mon 20/10

13:05-14:30

Nonstop1h 25m

£78

LondonDublin

LHR - DUB

LHRDUB

London Heathrow

Sat 1/11

13:35-15:05

Nonstop1h 30m

Dublin

Sun 30/11

20:40-22:00

Nonstop1h 20m

£78

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Heathrow to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland 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 Ireland

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

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Ireland (average of £71). Flying from London Heathrow Airport to Ireland in April is currently the most expensive (average of £92). 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 IE?

Find hourly flight availability from Heathrow to Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 September 2025.

It’s typically best to fly out from London Heathrow Airport to Ireland in the afternoon. Doing so could potentially save you 71% on the flight price compared to flying in the morning, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly return from Heathrow to Ireland. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to Ireland 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.

Weekly flight availability from London Heathrow Airport to Ireland

Explore weekly flight availability from Heathrow to Ireland. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 September 2025.

The most flights from LHR to IE0 are scheduled on a Monday (69 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (29 on average).

Reviews of airlines servicing Ireland

Get insights into the airlines that provide service to Ireland. 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 Ireland. Reviews last updated 17 September 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Ireland, such as Aer Lingus, Ryanair, andBritish Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,274 reviews
Check prices

Comfort

7.1

Food

6.5

Entertainment

6.9

Boarding

7.3

Crew

8.0

Overall

7.2

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
1,274 reviews
Aer Lingus
7.2
Good
1,274 reviews
Check prices

Comfort

7.1

Food

6.5

Entertainment

6.9

Boarding

7.3

Crew

8.0

Overall

7.2

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
1,274 reviews
Check prices

Comfort

7.1

Food

6.5

Entertainment

6.9

Boarding

7.3

Crew

8.0

Overall

7.2

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
7,363 reviews
Aer Lingus
7.2
Good
1,274 reviews
Check prices

Comfort

7.1

Food

6.5

Entertainment

6.9

Boarding

7.3

Crew

8.0

Overall

7.2

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 Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Departing from London Heathrow Airport to Ireland will take you 1h 25m. There are 279 mi between London Heathrow Airport and Ireland. Most flights are nonstop.

  • What are the most popular routes from London Heathrow Airport to Ireland?

    The most popular flight routes from London Heathrow Airport to Ireland are London Heathrow - Dublin, London Heathrow - Cork and London Heathrow - Shannon.

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

    No one likes to see their flight delayed. When booking a flight from London Heathrow Airport to Ireland consider choosing LATAM Airlines (80%), Air Canada (77%) or Qatar Airways (71%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from London Heathrow Airport to Ireland? While on average our users pay £821, our data indicates the cheapest price to be £80. The most popular route (London Heathrow - Dublin), is priced around £59.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Ireland 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 Ireland?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Ireland (average of £71). Flying from London Heathrow Airport to Ireland in April is currently the most expensive (average of £92). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Ireland

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Madrid flights
Gatwick to Madrid flights
Gatwick to Edinburgh flights
London City to Leonardo da Vinci/Fiumicino flights
Luton to Edinburgh flights
Heathrow to Charles de Gaulle flights
Stansted to Edinburgh flights
Gatwick to Charles de Gaulle flights
Gatwick to Lisbon flights
Heathrow to Málaga flights
Heathrow to Lisbon flights
Luton to Charles de Gaulle flights
Heathrow to Leonardo da Vinci/Fiumicino flights
Heathrow to Edinburgh flights
London City to Istanbul flights
London City to Charles de Gaulle flights
Heathrow to Palma de Mallorca flights
Heathrow to Istanbul flights
London City to Linate flights
Gatwick to Amsterdam flights
Heathrow to Luqa flights
Heathrow to Amsterdam flights
Luton to Amsterdam flights
Stansted to Madrid flights
Stansted to Amsterdam flights
Heathrow to Barcelona-El Prat flights
Gatwick to Belfast Intl flights
Heathrow to Malpensa flights
London City to Edinburgh flights
London City to Madrid flights
Stansted to Leonardo da Vinci/Fiumicino flights
Gatwick to Barcelona-El Prat flights
Gatwick to Porto flights
Luton to Barcelona-El Prat flights
Stansted to Lisbon flights
Heathrow to Orly flights
Gatwick to Frankfurt flights
Luton to Lisbon flights
Luton to Frankfurt flights
Gatwick to Leonardo da Vinci/Fiumicino flights
Gatwick to Orly flights
Heathrow to Athens flights
Heathrow to Larnaca flights
Heathrow to Frederic Chopin flights
Gatwick to Malpensa flights
London City to Vicenza flights
Gatwick to Munich flights
Southend to Amsterdam flights
Stansted to Barcelona-El Prat flights
London City to Amsterdam flights

Top 3 airlines flying from Heathrow to Ireland

Discover the top 3 airlines that operate flights from Heathrow to Ireland. 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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£29Average£60FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£66Average£156FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£78Average£161FlexibilityNo 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 Ireland?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Ireland. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Ireland.

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

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

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

Yes! Start tracking prices for Heathrow to Ireland flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.