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. Aer Lingus provides one of the quickest options available for as low as £71. Airlines will cover a distance of 368 mi. Generally, flights for this route are direct.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 cheapest flights from Ireland to London Heathrow Airport?

On average you can expect to pay £1,285 for a flight from Ireland to London Heathrow Airport. The cheapest flight overall is £52 while the most popular route, (Dublin - London Heathrow) is currently priced at £76.

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 (80%), British Airways (76%), Aer Lingus (76%).

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

Saturday flights are generally found to be more expensive for flights from Ireland to London Heathrow Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

How far in advance should I book a flight from Ireland to London Heathrow Airport?

Users have found that booking a flight from Ireland to London Heathrow Airport at least 57 days early can save you up to 226% on average compared to booking a flight this week. If booking 57 days before your flight isn’t an option for you, users have found flights from Ireland to London Heathrow Airport for as little as £82 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £167 for flights departing within the next 3 days.

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

The best pricing can be found in the month of January. Prices to London Heathrow Airport from Ireland average £81. You can even find prices in January for less than £81, as users have found deals to London Heathrow Airport from as low as £24. The month of December appears to be one of the more expensive times to travel to London Heathrow Airport from Ireland. Flying in the targeted month can save you up to 15%.

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.

£35+ Cheap Flights from Ireland to London Heathrow Airport

Cheap flight deals from Ireland to Heathrow

Round-trip from	£71
One-way from	£35
Popular in	December
Cheapest in	January
Average price	£70
Good round-trip deal	£135 or less
Good one-way deal	£47 or less

Aer Lingus
15/10-16/10
Nonstop
2h 55m total
Ireland to London

Search Deals

Aer Lingus
29/10
Nonstop
1h 20m total
Ireland to London

Search Deals

High demand for flights, 15% potential price rise

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£1 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 Ireland to London Heathrow.

Search Deals

Price to beat on a one-way flight from Ireland to London Heathrow.

Search Deals

Find flight deals from Ireland to Heathrow

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 15 September 2025.

Wed 15/1016:55SNN - LHR

Nonstop1h 25mAer Lingus

Thu 16/1014:40LHR - SNN

Nonstop1h 30mAer Lingus

Deal found 14/9£71

Mon 13/1018:00DUB - LHR

Nonstop1h 25mAer Lingus

Mon 20/1021:10LHR - DUB

Nonstop1h 20mAer Lingus

Deal found 15/9£74

Wed 22/1010:55DUB - LHR

Nonstop1h 35mBritish Airways

Wed 22/1015:40LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£76

Tue 11/1110:55DUB - LHR

Nonstop1h 35mBritish Airways

Tue 11/1115:35LHR - DUB

Nonstop1h 30mBritish Airways

Deal found 15/9£77

Wed 12/1113:10DUB - LHR

Nonstop1h 25mBritish Airways

Sat 15/1118:25LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 15/9£77

Mon 13/1021:15SNN - LHR

Nonstop1h 25mAer Lingus

Mon 20/1019:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 15/9£77

Tue 18/1113:25DUB - LHR

Nonstop1h 25mBritish Airways

Tue 18/1118:15LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£78

Sat 4/1020:30ORK - LHR

Nonstop1h 15mAer Lingus

Sat 11/1022:25LHR - ORK

Nonstop1h 20mAer Lingus

Deal found 13/9£78

Thu 2/1021:15SNN - LHR

Nonstop1h 25mAer Lingus

Sun 5/1009:50LHR - SNN

Nonstop1h 30mAer Lingus

Deal found 13/9£78

Sat 4/1013:05NOC - LHR

Nonstop1h 25mAer Lingus

Sun 5/1011:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 13/9£79

Sat 11/1019:00DUB - LHR

Nonstop1h 20mAer Lingus

Tue 21/1015:50LHR - DUB

Nonstop1h 25mAer Lingus

Deal found 15/9£79

Thu 6/1113:10DUB - LHR

Nonstop1h 25mBritish Airways

Mon 10/1118:15LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£80

Best flights from Ireland to Heathrow
Discover carefully curated flight deals from Ireland to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 September 2025.

Wed 15/1016:55SNN - LHR

Nonstop1h 25mAer Lingus

Thu 16/1014:40LHR - SNN

Nonstop1h 30mAer Lingus

Deal found 14/9£71

Thu 6/1113:10DUB - LHR

Nonstop1h 25mBritish Airways

Mon 10/1118:15LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£77

Fri 17/1021:15SNN - LHR

Nonstop1h 25mMultiple Airlines

Mon 20/1011:05LHR - SNN

2 stops11h 45mMultiple Airlines

Deal found 14/9£137

Wed 5/1110:20DUB - LHR

Nonstop1h 35mBritish Airways

Sat 8/1112:50LHR - DUB

Nonstop1h 30mBritish Airways

Deal found 14/9£78

Thu 9/1013:05NOC - LHR

Nonstop1h 25mAer Lingus

Thu 16/1011:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 13/9£79

Thu 27/1120:40DUB - LHR

Nonstop1h 20mBritish Airways

Sun 30/1108:25LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£80

Sat 18/1017:30SNN - LHR

Nonstop1h 25mAer Lingus

Mon 20/1019:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 13/9£80

Sat 28/213:10DUB - LHR

Nonstop1h 25mBritish Airways

Wed 4/310:40LHR - DUB

Nonstop1h 30mBritish Airways

Deal found 15/9£80

Tue 14/1013:05NOC - LHR

Nonstop1h 25mAer Lingus

Tue 21/1011:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 14/9£81

Thu 27/1113:10DUB - LHR

Nonstop1h 25mBritish Airways

Sat 29/1108:35LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£80

Sun 12/1021:15SNN - LHR

Nonstop1h 25mAer Lingus

Mon 20/1019:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 13/9£83

Tue 11/1108:50DUB - LHR

Nonstop1h 35mBritish Airways

Sat 22/1118:25LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 13/9£81

Direct flights from Ireland to Heathrow
Explore direct flight options from Ireland to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 September 2025.

Wed 15/1016:55SNN - LHR

Nonstop1h 25mAer Lingus

Thu 16/1014:40LHR - SNN

Nonstop1h 30mAer Lingus

Deal found 14/9£71

Mon 13/1018:00DUB - LHR

Nonstop1h 25mAer Lingus

Mon 20/1021:10LHR - DUB

Nonstop1h 20mAer Lingus

Deal found 15/9£74

Wed 22/1010:55DUB - LHR

Nonstop1h 35mBritish Airways

Wed 22/1015:40LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£76

Tue 11/1110:55DUB - LHR

Nonstop1h 35mBritish Airways

Tue 11/1115:35LHR - DUB

Nonstop1h 30mBritish Airways

Deal found 15/9£77

Wed 12/1113:10DUB - LHR

Nonstop1h 25mBritish Airways

Sat 15/1118:25LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 15/9£77

Mon 13/1021:15SNN - LHR

Nonstop1h 25mAer Lingus

Mon 20/1019:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 15/9£77

Tue 18/1113:25DUB - LHR

Nonstop1h 25mBritish Airways

Tue 18/1118:15LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£78

Sat 4/1020:30ORK - LHR

Nonstop1h 15mAer Lingus

Sat 11/1022:25LHR - ORK

Nonstop1h 20mAer Lingus

Deal found 13/9£78

Thu 2/1021:15SNN - LHR

Nonstop1h 25mAer Lingus

Sun 5/1009:50LHR - SNN

Nonstop1h 30mAer Lingus

Deal found 13/9£78

Sat 4/1013:05NOC - LHR

Nonstop1h 25mAer Lingus

Sun 5/1011:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 13/9£79

Sat 11/1019:00DUB - LHR

Nonstop1h 20mAer Lingus

Tue 21/1015:50LHR - DUB

Nonstop1h 25mAer Lingus

Deal found 15/9£79

Sat 28/213:10DUB - LHR

Nonstop1h 25mBritish Airways

Wed 4/310:40LHR - DUB

Nonstop1h 30mBritish Airways

Deal found 15/9£80

Last-minute flights from Ireland to Heathrow
Discover last-minute flight deals from Ireland to Heathrow. Data last updated 15 September 2025 and is based on user searches.

Thu 2/1021:15SNN - LHR

Nonstop1h 25mAer Lingus

Sun 5/1009:50LHR - SNN

Nonstop1h 30mAer Lingus

Deal found 13/9£78

Sat 4/1020:30ORK - LHR

Nonstop1h 15mAer Lingus

Sat 11/1022:25LHR - ORK

Nonstop1h 20mAer Lingus

Deal found 13/9£78

Sat 4/1013:05NOC - LHR

Nonstop1h 25mAer Lingus

Sun 5/1011:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 13/9£79

Wed 8/1016:55SNN - LHR

Nonstop1h 25mAer Lingus

Wed 15/1014:40LHR - SNN

Nonstop1h 30mAer Lingus

Deal found 14/9£80

Sat 11/1019:00DUB - LHR

Nonstop1h 20mAer Lingus

Sat 18/1015:50LHR - DUB

Nonstop1h 25mAer Lingus

Deal found 15/9£77

Sat 11/1019:00DUB - LHR

Nonstop1h 20mAer Lingus

Tue 21/1015:50LHR - DUB

Nonstop1h 25mAer Lingus

Deal found 15/9£79

Mon 13/1018:00DUB - LHR

Nonstop1h 25mAer Lingus

Mon 20/1021:10LHR - DUB

Nonstop1h 20mAer Lingus

Deal found 15/9£74

Mon 13/1021:15SNN - LHR

Nonstop1h 25mAer Lingus

Mon 20/1019:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 15/9£77

Wed 15/1016:55SNN - LHR

Nonstop1h 25mAer Lingus

Thu 16/1014:40LHR - SNN

Nonstop1h 30mAer Lingus

Deal found 14/9£71

Sat 18/1018:00DUB - LHR

Nonstop1h 25mAer Lingus

Mon 20/1007:40LHR - DUB

Nonstop1h 20mAer Lingus

Deal found 13/9£80

Wed 22/1010:55DUB - LHR

Nonstop1h 35mBritish Airways

Wed 22/1015:40LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 14/9£76

Wed 29/1019:45DUB - LHR

Nonstop1h 20mMultiple Airlines

Wed 5/1115:30LHR - DUB

Nonstop1h 30mMultiple Airlines

Deal found 14/9£78

One-way flights from Ireland to Heathrow
Search for one-way flight options from Ireland to Heathrow. Find affordable one-way fares based on user searches. Data last updated 15 September 2025.

Wed 29/1019:45DUB - LHR

Nonstop1h 20mAer Lingus

Deal found 14/9£35

Thu 2/1021:15SNN - LHR

Nonstop1h 25mAer Lingus

Deal found 13/9£35

Tue 4/1118:30DUB - LHR

Nonstop1h 20mAer Lingus

Deal found 15/9£36

Wed 22/1020:30ORK - LHR

Nonstop1h 15mAer Lingus

Deal found 14/9£36

Mon 20/1012:00DUB - LHR

Nonstop1h 25mAer Lingus

Deal found 15/9£37

Tue 7/1016:55SNN - LHR

Nonstop1h 25mAer Lingus

Deal found 15/9£38

Sat 18/1018:00DUB - LHR

Nonstop1h 25mAer Lingus

Deal found 13/9£38

Thu 30/1006:40DUB - LHR

Nonstop1h 25mAer Lingus

Deal found 14/9£39

Sat 1/1120:10ORK - LHR

Nonstop1h 15mAer Lingus

Deal found 15/9£39

Wed 15/1010:55DUB - LHR

Nonstop1h 35mBritish Airways

Deal found 15/9£40

Sat 28/216:05ORK - LHR

Nonstop1h 15mAer Lingus

Deal found 13/9£40

Sun 26/1020:05SNN - LHR

Nonstop1h 20mAer Lingus

Deal found 14/9£40

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ireland to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Wed 15/10

16:55-18:20

Nonstop1h 25m

London Heathrow

Thu 16/10

14:40-16:10

Nonstop1h 30m

£71

DublinLondon

DUB - LHR

DUBLHR

Dublin

Thu 6/11

13:10-14:35

Nonstop1h 25m

London Heathrow

Mon 10/11

18:15-19:40

Nonstop1h 25m

£77

DublinLondon

DUB - LHR

DUBLHR

Dublin

Wed 5/11

10:20-11:55

Nonstop1h 35m

London Heathrow

Sat 8/11

12:50-14:20

Nonstop1h 30m

£78

KnockLondon

NOC - LHR

NOCLHR

Knock Intl

Thu 9/10

13:05-14:30

Nonstop1h 25m

London Heathrow

Thu 16/10

11:05-12:35

Nonstop1h 30m

£79

DublinLondon

DUB - LHR

DUBLHR

Dublin

Thu 27/11

20:40-22:00

Nonstop1h 20m

London Heathrow

Sun 30/11

08:25-09:50

Nonstop1h 25m

£80

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sat 18/10

17:30-18:55

Nonstop1h 25m

London Heathrow

Mon 20/10

19:10-20:35

Nonstop1h 25m

£80

DublinLondon

DUB - LHR

DUBLHR

Dublin

Sat 28/2

13:10-14:35

Nonstop1h 25m

London Heathrow

Wed 4/3

10:40-12:10

Nonstop1h 30m

£80

DublinLondon

DUB - LHR

DUBLHR

Dublin

Thu 27/11

13:10-14:35

Nonstop1h 25m

London Heathrow

Sat 29/11

08:35-10:00

Nonstop1h 25m

£80

KnockLondon

NOC - LHR

NOCLHR

Knock Intl

Tue 14/10

13:05-14:30

Nonstop1h 25m

London Heathrow

Tue 21/10

11:05-12:35

Nonstop1h 30m

£81

DublinLondon

DUB - LHR

DUBLHR

Dublin

Tue 11/11

08:50-10:25

Nonstop1h 35m

London Heathrow

Sat 22/11

18:25-19:50

Nonstop1h 25m

£81

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 60 results

...

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, January is the cheapest month in which you can book a flight from Ireland to London Heathrow Airport (average of £112). Flying from Ireland to London Heathrow Airport in August is currently the most expensive (average of £164). 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?

It’s optimal to fly from Ireland to London Heathrow Airport in the evening. By choosing this option you can save up to 76% on the cost of your flight, compared to a flight in the afternoon.

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

Travellers seeking maximum savings on their Ireland to London Heathrow Airport flight should consider departing on Friday evenings when fares are most often at their lowest. Saturday afternoons 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

The most flights from IE0 to LHR are scheduled on a Sunday (75 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (50 on average).

Reviews of airlines servicing Heathrow

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

1,270 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jul 2025

DUB - ORD

The inability to check in with the final leg of our flight via the Aers Lingus app led to a stressful trip as the final leg was overbooked and we were not able to confirm a seat until we had arrived to Chicago. Lack of earphones for the "entertainment" system were not voluntarily provided or even referenced as available (even for a charge) while boarding the plane - this seems like an oversight.

Aer Lingus

7.2

Good

1,270 reviews

Aer Lingus

7.2

Good

1,270 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jul 2025

DUB - ORD

British Airways

6.7

Okay

7,361 reviews

Aer Lingus

7.2

Good

1,270 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jul 2025

DUB - ORD

Related info for your journey

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. Aer Lingus provides one of the quickest options available for as low as £71. 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 (80%), British Airways (76%), Aer Lingus (76%).
What are the cheapest flights from Ireland to London Heathrow Airport?
On average you can expect to pay £1,285 for a flight from Ireland to London Heathrow Airport. The cheapest flight overall is £52 while the most popular route, (Dublin - London Heathrow) is currently priced at £76.
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, January is the cheapest month in which you can book a flight from Ireland to London Heathrow Airport (average of £112). Flying from Ireland to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Milton Keynes

Croydon

Hounslow

Slough

Gatwick

Northampton

Luton

Deal

Wembley

Ilford

Crawley

Hayes

Watford

Winchester

Chichester

Ipswich

Swindon

Dartford

Guildford

Brentford

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Ireland to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£57	Average£129	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£70	Average£136	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Fly with Cheapflights

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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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.

Cheap flights from Ireland to London Heathrow Airport from £35

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 29/10. Fares are subject to change and may not be available on all flights or dates of travel.

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 15 September 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ireland to Heathrow

Cheapest flights from Ireland to HeathrowExplore 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 15 September 2025.

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 15 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ireland to London Heathrow Airport that are best for you.

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.

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?

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 15 September 2025.

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.

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 15 September 2025.

Reviews of airlines servicing Heathrow

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.

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?

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

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

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

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

How can I find direct flights from Ireland to Heathrow?

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

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Alternative routes for Ireland to Heathrow

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Top 2 airlines flying from Ireland to Heathrow

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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 15 September 2025.