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Cheap flights from Ireland to London Heathrow Airport from £30

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 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — LHR
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Ireland to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Ireland to Heathrow
Explore the most affordable flight options available from Ireland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 November 2025.

Sat 22/1117:55DUB - LHR
Nonstop1h 20mBritish Airways
Sat 29/1113:35LHR - DUB
Nonstop1h 30mBritish Airways
Deal found 6/11£69
Fri 5/1220:35DUB - LHR
Nonstop1h 20mBritish Airways
Sat 13/1212:50LHR - DUB
Nonstop1h 30mBritish Airways
Deal found 6/11£73
Sat 13/1210:55DUB - LHR
Nonstop1h 35mBritish Airways
Sun 14/1208:25LHR - DUB
Nonstop1h 25mBritish Airways
Deal found 5/11£74
Sat 29/1117:55DUB - LHR
Nonstop1h 20mBritish Airways
Wed 10/1212:50LHR - DUB
Nonstop1h 30mBritish Airways
Deal found 5/11£75
Sat 13/1210:55DUB - LHR
Nonstop1h 35mBritish Airways
Sat 13/1218:25LHR - DUB
Nonstop1h 25mBritish Airways
Deal found 5/11£76
Tue 9/1213:25DUB - LHR
Nonstop1h 25mBritish Airways
Thu 11/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Deal found 5/11£78
Sat 22/1115:10DUB - LHR
Nonstop1h 25mBritish Airways
Sun 23/1108:25LHR - DUB
Nonstop1h 25mBritish Airways
Deal found 5/11£79
Fri 5/1220:35DUB - LHR
Nonstop1h 20mBritish Airways
Fri 12/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Deal found 5/11£79
Mon 1/1217:55DUB - LHR
Nonstop1h 20mBritish Airways
Sat 6/1206:30LHR - DUB
Nonstop1h 25mBritish Airways
Deal found 5/11£82
Thu 20/1113:00NOC - LHR
Nonstop1h 30mAer Lingus
Thu 27/1110:55LHR - NOC
Nonstop1h 30mAer Lingus
Deal found 6/11£92
Wed 3/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Wed 10/1218:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 5/11£93
Thu 13/1113:00NOC - LHR
Nonstop1h 30mAer Lingus
Wed 19/1110:55LHR - NOC
Nonstop1h 30mAer Lingus
Deal found 6/11£94

Cheap flight deals from Ireland to Heathrow

Keep the following information in mind while searching for Ireland to Heathrow flight deals. Data was last updated 7 November 2025.

Round-trip from

£66

One-way from

£30

Popular in

October

Cheapest in

January

Average price

£68

Good round-trip deal

£92 or less

Good one-way deal

£63 or less
British Airways
  • British Airways
  • 12/1-15/1
  • Nonstop
  • 2h 50m total
  • Ireland to London
Search Deals
British Airways
  • British Airways
  • 20/1
  • Nonstop
  • 1h 20m total
  • Ireland to London
Search Deals
High demand for flights, 10% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Ireland to London Heathrow.
Search Deals
Price to beat on a one-way flight from Ireland to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to Heathrow 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 7 November 2025.
Use the filters below to find and compare flights from Ireland to London Heathrow Airport that are best for you.

Fly from

Ireland

Fly to

Heathrow

Route

Depart

Return

Price

DublinLondon

DUB - LHR

DUBLHR

Dublin

Wed 14/1

08:50-10:25

Nonstop1h 35m

London Heathrow

Sun 18/1

08:25-09:50

Nonstop1h 25m

£70

DublinLondon

DUB - LHR

DUBLHR

Dublin

Mon 12/1

20:40-22:00

Nonstop1h 20m

London Heathrow

Mon 19/1

13:35-15:05

Nonstop1h 30m

£71

DublinLondon

DUB - LHR

DUBLHR

Dublin

Fri 23/1

20:35-21:55

Nonstop1h 20m

London Heathrow

Sun 25/1

12:45-14:15

Nonstop1h 30m

£73

DublinLondon

DUB - LHR

DUBLHR

Dublin

Sat 28/2

20:40-22:00

Nonstop1h 20m

London Heathrow

Sun 1/3

08:25-09:50

Nonstop1h 25m

£73

DublinLondon

DUB - LHR

DUBLHR

Dublin

Tue 17/3

20:40-22:00

Nonstop1h 20m

London Heathrow

Thu 19/3

06:30-07:55

Nonstop1h 25m

£73

DublinLondon

DUB - LHR

DUBLHR

Dublin

Thu 29/1

10:30-12:05

Nonstop1h 35m

London Heathrow

Thu 29/1

15:30-17:00

Nonstop1h 30m

£75

DublinLondon

DUB - LHR

DUBLHR

Dublin

Sun 1/3

10:45-12:20

Nonstop1h 35m

London Heathrow

Tue 10/3

06:30-07:55

Nonstop1h 25m

£76

DublinLondon

DUB - LHR

DUBLHR

Dublin

Fri 13/2

20:35-21:55

Nonstop1h 20m

London Heathrow

Fri 20/2

06:30-07:55

Nonstop1h 25m

£79

DublinLondon

DUB - LHR

DUBLHR

Dublin

Wed 10/12

08:50-10:25

Nonstop1h 35m

London Heathrow

Wed 10/12

12:50-14:20

Nonstop1h 30m

£80

DublinLondon

DUB - LHR

DUBLHR

Dublin

Fri 5/12

20:35-21:55

Nonstop1h 20m

London Heathrow

Fri 12/12

12:40-14:10

Nonstop1h 30m

£82

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 60 results
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Best time to book a flight from Ireland to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ireland 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 Ireland to London Heathrow Airport

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

Currently, February is the cheapest month in which you can book a flight from Ireland to London Heathrow Airport (average of £32). Flying from Ireland to London Heathrow Airport in August is currently the most expensive (average of £84). 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 IE to LHR?

Find hourly flight availability from Ireland to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 November 2025.

It’s optimal to fly from Ireland to London Heathrow Airport in the evening. By choosing this option you can save up to 59% on the cost of your flight, compared to a flight in the morning.

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

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

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

Weekly flight availability from Ireland to London Heathrow Airport

Explore weekly flight availability from Ireland to Heathrow. 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 7 November 2025.

The most flights from IE0 to LHR are scheduled on a Thursday (69 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (35 on average).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 7 November 2025.
See what other customers who have flown with Aer Lingus and British Airways from Ireland to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Entertainment

6.9

Overall

7.2

Food

6.6

Comfort

7.1

Boarding

7.4

Crew

8.0

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

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 from Dublin to Washington (Flight EI 119 on October 25, 2025) 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. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.
Aer Lingus
7.2
Good
1,365 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Entertainment

6.9

Overall

7.2

Food

6.6

Comfort

7.1

Boarding

7.4

Crew

8.0

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

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 from Dublin to Washington (Flight EI 119 on October 25, 2025) 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. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.
British Airways
6.7
Okay
7,500 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Entertainment

6.9

Overall

7.2

Food

6.6

Comfort

7.1

Boarding

7.4

Crew

8.0

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

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 from Dublin to Washington (Flight EI 119 on October 25, 2025) 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. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Heathrow. 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 Ireland to London Heathrow Airport?

    A quick flight from Ireland to London Heathrow Airport can take about 1h 25m. British Airways provides one of the quickest options available for as low as £95. Airlines will cover a distance of 368 mi. Generally, flights for this route are direct.

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

    Most travelers choose Dublin - London Heathrow, Cork - London Heathrow or Shannon - London Heathrow when deciding on the best route from Ireland to London Heathrow Airport.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ireland to London Heathrow Airport on time: Air Canada (72%), Qatar Airways (70%), British Airways (69%).

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

    On average you can expect to pay £1,322 for a flight from Ireland to London Heathrow Airport. The cheapest flight overall is £47 while the most popular route, (Dublin - London Heathrow) is currently priced at £66.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Ireland to London Heathrow Airport (average of £32). Flying from Ireland to London Heathrow Airport in August is currently the most expensive (average of £84). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

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Alternative routes for Ireland to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Ireland to Heathrow

Discover the top 2 airlines that operate flights from Ireland to Heathrow. 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 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£73Average£146FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£74Average£136FlexibilityNo cancel feeOn-time70%
Search British Airways 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 Ireland to Heathrow?

Cheapflights makes it easy to find Ireland to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Ireland.

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

Need flexible booking options for your flight to Heathrow from Ireland? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from Ireland to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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