What are the cheapest airlines to fly from Ireland to London Heathrow Airport one-way?

The cheapet airlines for a one-way flight from Ireland to London Heathrow Airport are British Airways (£51), Aer Lingus (£52), and Vueling (£61).

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, Shannon - London Heathrow or Cork - 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 £1,274 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 £68.

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 (84%), British Airways (83%), Aer Lingus (83%).

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 232% 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 £91 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 £145 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 £80. You can even find prices in January for less than £80, as users have found deals to London Heathrow Airport from as low as £24. The month of June 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 24%.

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.

£158+ Flights from Ireland to London Heathrow Airport

Cheap flight deals from Ireland to Heathrow

Round-trip from	£67
One-way from	£51
Popular in	June
Cheapest in	January
Average price	£100
Good round-trip deal	£103 or less
Good one-way deal	£60 or less

British Airways
13/8-30/8
Nonstop
3h 05m total
Ireland to London

Search Deals

British Airways
24/7
Nonstop
1h 35m total
Ireland to London

Search Deals

Highest demand for flights based on searches. 13% potential increase in price (£9 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£2 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 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 27 June 2025.

Wed 13/810:50DUB - LHR

Nonstop1h 40mBritish Airways

Sat 30/806:15LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 26/6£67

Thu 3/713:05NOC - LHR

Nonstop1h 25mAer Lingus

Wed 9/711:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 25/6£91

Thu 3/721:15SNN - LHR

Nonstop1h 25mAer Lingus

Mon 7/719:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 25/6£91

Sat 19/718:00DUB - LHR

Nonstop1h 25mMultiple Airlines

Wed 23/716:30LHR - DUB

Nonstop1h 25mMultiple Airlines

Deal found 26/6£101

Sat 19/720:30ORK - LHR

Nonstop1h 15mAer Lingus

Mon 21/722:25LHR - ORK

Nonstop1h 20mAer Lingus

Deal found 25/6£110

Thu 24/718:00DUB - LHR

Nonstop1h 25mAer Lingus

Mon 28/721:10LHR - DUB

Nonstop1h 20mAer Lingus

Deal found 25/6£118

Thu 10/713:05NOC - LHR

Nonstop1h 25mMultiple Airlines

Thu 17/721:50LHR - NOC

1 stop11h 00mMultiple Airlines

Deal found 26/6£137

Tue 22/720:30ORK - LHR

Nonstop1h 15mMultiple Airlines

Fri 25/721:00LHR - ORK

1 stop10h 35mMultiple Airlines

Deal found 26/6£141

Thu 7/805:55DUB - LHR

1 stop4h 50mKLM

Mon 11/811:45LHR - DUB

1 stop4h 55mKLM

Deal found 26/6£144

Wed 6/811:45ORK - LHR

Nonstop1h 20mBritish Airways

Tue 26/809:20LHR - ORK

Nonstop1h 25mBritish Airways

Deal found 26/6£151

Sat 11/1020:05DUB - LHR

1 stop12h 50mScandinavian Airlines

Sat 18/1006:40LHR - DUB

1 stop12h 35mScandinavian Airlines

Deal found 25/6£154

Tue 19/821:15SNN - LHR

Nonstop1h 25mMultiple Airlines

Tue 26/819:10LHR - SNN

Nonstop1h 25mMultiple Airlines

Deal found 25/6£159

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 27 June 2025.

Wed 13/810:50DUB - LHR

Nonstop1h 40mBritish Airways

Sat 30/806:15LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 26/6£67

Sat 19/718:00DUB - LHR

Nonstop1h 25mMultiple Airlines

Wed 23/716:30LHR - DUB

Nonstop1h 25mMultiple Airlines

Deal found 26/6£101

Sat 19/720:30ORK - LHR

Nonstop1h 15mAer Lingus

Mon 21/722:25LHR - ORK

Nonstop1h 20mAer Lingus

Deal found 25/6£110

Thu 7/805:55DUB - LHR

1 stop4h 50mKLM

Mon 11/811:45LHR - DUB

1 stop4h 55mKLM

Deal found 26/6£144

Sat 11/1020:05DUB - LHR

1 stop12h 50mScandinavian Airlines

Sat 18/1006:40LHR - DUB

1 stop12h 35mScandinavian Airlines

Deal found 25/6£154

Fri 29/806:00DUB - LHR

1 stop26h 00mAir France

Sun 31/819:45LHR - DUB

1 stop12h 30mAir France

Deal found 26/6£166

Tue 19/813:50ORK - LHR

1 stop7h 55mSWISS

Tue 26/806:00LHR - ORK

1 stop7h 05mSWISS

Deal found 25/6£176

Thu 10/713:05NOC - LHR

Nonstop1h 25mAer Lingus

Sun 13/711:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 25/6£113

Mon 7/721:15SNN - LHR

Nonstop1h 25mAer Lingus

Sun 13/719:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 25/6£117

Thu 10/713:05NOC - LHR

Nonstop1h 25mMultiple Airlines

Thu 17/721:50LHR - NOC

1 stop11h 00mMultiple Airlines

Deal found 26/6£137

Mon 1/917:10ORK - LHR

1 stop5h 00mLufthansa

Fri 5/911:30LHR - ORK

1 stop4h 55mLufthansa

Deal found 26/6£284

Thu 24/718:00DUB - LHR

Nonstop1h 25mAer Lingus

Mon 28/721:10LHR - DUB

Nonstop1h 20mAer Lingus

Deal found 25/6£118

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 27 June 2025.

Wed 13/810:50DUB - LHR

Nonstop1h 40mBritish Airways

Sat 30/806:15LHR - DUB

Nonstop1h 25mBritish Airways

Deal found 26/6£67

Sat 19/718:00DUB - LHR

Nonstop1h 25mMultiple Airlines

Wed 23/716:30LHR - DUB

Nonstop1h 25mMultiple Airlines

Deal found 26/6£101

Sat 19/720:30ORK - LHR

Nonstop1h 15mAer Lingus

Mon 21/722:25LHR - ORK

Nonstop1h 20mAer Lingus

Deal found 25/6£110

Thu 10/713:05NOC - LHR

Nonstop1h 25mAer Lingus

Sun 13/711:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 25/6£113

Mon 7/721:15SNN - LHR

Nonstop1h 25mAer Lingus

Sun 13/719:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 25/6£117

Thu 24/718:00DUB - LHR

Nonstop1h 25mAer Lingus

Mon 28/721:10LHR - DUB

Nonstop1h 20mAer Lingus

Deal found 25/6£118

Wed 16/720:30ORK - LHR

Nonstop1h 15mMultiple Airlines

Fri 18/722:25LHR - ORK

Nonstop1h 20mMultiple Airlines

Deal found 25/6£146

Wed 6/811:45ORK - LHR

Nonstop1h 20mBritish Airways

Tue 26/809:20LHR - ORK

Nonstop1h 25mBritish Airways

Deal found 26/6£151

Tue 19/821:15SNN - LHR

Nonstop1h 25mMultiple Airlines

Tue 26/819:10LHR - SNN

Nonstop1h 25mMultiple Airlines

Deal found 25/6£159

Thu 10/713:05NOC - LHR

Nonstop1h 25mMultiple Airlines

Thu 17/711:05LHR - NOC

Nonstop1h 30mMultiple Airlines

Deal found 26/6£165

Sat 9/807:40SNN - LHR

Nonstop1h 25mBritish Airways

Sat 16/814:20LHR - SNN

Nonstop1h 30mBritish Airways

Deal found 25/6£207

Fri 15/813:05NOC - LHR

Nonstop1h 25mBritish Airways

Tue 19/811:05LHR - NOC

Nonstop1h 30mBritish Airways

Deal found 26/6£213

Last-minute flights from Ireland to Heathrow
Discover last-minute flight deals from Ireland to Heathrow. Data last updated 27 June 2025 and is based on user searches.

Wed 2/705:55DUB - LHR

1 stop4h 50mKLM

Thu 10/708:40LHR - DUB

1 stop3h 55mKLM

Deal found 25/6£215

Thu 3/713:05NOC - LHR

Nonstop1h 25mAer Lingus

Wed 9/711:05LHR - NOC

Nonstop1h 30mAer Lingus

Deal found 25/6£91

Thu 3/721:15SNN - LHR

Nonstop1h 25mAer Lingus

Mon 7/719:10LHR - SNN

Nonstop1h 25mAer Lingus

Deal found 25/6£91

Thu 3/721:15SNN - LHR

Nonstop1h 25mMultiple Airlines

Wed 9/719:10LHR - SNN

Nonstop1h 25mMultiple Airlines

Deal found 25/6£160

Thu 3/721:15SNN - LHR

Nonstop1h 25mBritish Airways

Mon 7/719:10LHR - SNN

Nonstop1h 25mBritish Airways

Deal found 26/6£211

Fri 4/720:30ORK - LHR

Nonstop1h 15mMultiple Airlines

Tue 8/722:25LHR - ORK

Nonstop1h 20mMultiple Airlines

Deal found 26/6£159

Fri 4/720:30ORK - LHR

Nonstop1h 15mBritish Airways

Sun 6/722:25LHR - ORK

Nonstop1h 20mBritish Airways

Deal found 25/6£170

Fri 4/712:35DUB - LHR

1 stop3h 50mEurowings

Sun 6/708:05LHR - DUB

1 stop6h 25mEurowings

Deal found 25/6£209

Sat 5/720:30ORK - LHR

Nonstop1h 15mAer Lingus

Tue 8/722:25LHR - ORK

Nonstop1h 20mAer Lingus

Deal found 26/6£143

Sat 5/719:00DUB - LHR

Nonstop1h 20mMultiple Airlines

Wed 23/716:30LHR - DUB

Nonstop1h 25mMultiple Airlines

Deal found 25/6£152

Sun 6/707:30DUB - LHR

Nonstop1h 35mAer Lingus

Tue 8/715:50LHR - DUB

Nonstop1h 25mAer Lingus

Deal found 26/6£160

Sun 6/709:10NOC - LHR

1 stop9h 55mMultiple Airlines

Tue 8/711:05LHR - NOC

Nonstop1h 30mMultiple Airlines

Deal found 25/6£165

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 27 June 2025.

Thu 24/708:35DUB - LHR

Nonstop1h 35mBritish Airways

Deal found 26/6£51

Sat 9/818:00DUB - LHR

Nonstop1h 25mAer Lingus

Deal found 26/6£52

Sat 9/820:30ORK - LHR

Nonstop1h 15mAer Lingus

Deal found 25/6£52

Tue 15/707:40SNN - LHR

Nonstop1h 25mAer Lingus

Deal found 25/6£52

Thu 25/913:05NOC - LHR

Nonstop1h 25mAer Lingus

Deal found 25/6£56

Tue 30/919:30DUB - LHR

1 stop18h 45mVueling

Deal found 26/6£61

Sat 27/920:05DUB - LHR

1 stop12h 50mScandinavian Airlines

Deal found 26/6£65

Mon 21/720:30ORK - LHR

Nonstop1h 15mBritish Airways

Deal found 26/6£70

Wed 30/713:20DUB - LHR

1 stop4h 15mKLM

Deal found 25/6£79

Thu 25/908:55NOC - LHR

1 stop5h 10mMultiple Airlines

Deal found 25/6£80

Wed 12/1105:45ORK - LHR

1 stop31h 20mMultiple Airlines

Deal found 26/6£80

Sat 12/709:00DUB - LHR

1 stop12h 40mMultiple Airlines

Deal found 25/6£81

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

DublinLondon

DUB - LHR

DUBLHR

Dublin

Wed 13/8

10:50-12:30

Nonstop1h 40m

London Heathrow

Sat 30/8

06:15-07:40

Nonstop1h 25m

£67

DublinLondon

DUB - LHR

DUBLHR

Dublin

Sat 19/7

18:00-19:25

Nonstop1h 25m

London Heathrow

Wed 23/7

16:30-17:55

Nonstop1h 25m

£101

CorkLondon

ORK - LHR

ORKLHR

Cork

Sat 19/7

20:30-21:45

Nonstop1h 15m

London Heathrow

Mon 21/7

22:25-23:45

Nonstop1h 20m

£110

KnockLondon

NOC - LHR

NOCLHR

Knock Intl

Thu 10/7

13:05-14:30

Nonstop1h 25m

London Heathrow

Sun 13/7

11:05-12:35

Nonstop1h 30m

£113

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Mon 7/7

21:15-22:40

Nonstop1h 25m

London Heathrow

Sun 13/7

19:10-20:35

Nonstop1h 25m

£117

DublinLondon

DUB - LHR

DUBLHR

Dublin

Thu 24/7

18:00-19:25

Nonstop1h 25m

London Heathrow

Mon 28/7

21:10-22:30

Nonstop1h 20m

£118

KnockLondon

NOC - LHR

NOCLHR

Knock Intl

Thu 10/7

13:05-14:30

Nonstop1h 25m

London Heathrow

Thu 17/7

21:50-08:50

1 stop11h 00m

£137

CorkLondon

ORK - LHR

ORKLHR

Cork

Tue 22/7

20:30-21:45

Nonstop1h 15m

London Heathrow

Fri 25/7

21:00-07:35

1 stop10h 35m

£141

DublinLondon

DUB - LHR

DUBLHR

Dublin

Thu 7/8

05:55-10:45

1 stop4h 50m

London Heathrow

Mon 11/8

11:45-16:40

1 stop4h 55m

£144

CorkLondon

ORK - LHR

ORKLHR

Cork

Wed 6/8

11:45-13:05

Nonstop1h 20m

London Heathrow

Tue 26/8

09:20-10:45

Nonstop1h 25m

£151

Flights are sorted by cheapest return flights first.

Deals found on 25/6

Showing 1-10 of 48 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 78% 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. Sunday 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 Friday (78 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (38 on average).

Reviews of airlines servicing Heathrow

See what other customers who have flown with Aegean Airlines, KLM, andAustrian Airlines 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.

Aegean Airlines

8.2

Very Good

761 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

Aegean Airlines

8.2

Very Good

761 reviews

Aegean Airlines

8.2

Very Good

761 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

KLM

7.8

Good

1,365 reviews

Aegean Airlines

8.2

Very Good

761 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

Austrian Airlines

7.6

Good

805 reviews

Aegean Airlines

8.2

Very Good

761 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

Air France

7.5

Good

1,469 reviews

Aegean Airlines

8.2

Very Good

761 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

SWISS

7.5

Good

1,649 reviews

Aegean Airlines

8.2

Very Good

761 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

Related info for your journey

What are the cheapest airlines to fly from Ireland to London Heathrow Airport one-way?
The cheapet airlines for a one-way flight from Ireland to London Heathrow Airport are British Airways (£51), Aer Lingus (£52), and Vueling (£61).
What are the most popular routes from Ireland to London Heathrow Airport?
Most travelers choose Dublin - London Heathrow, Shannon - London Heathrow or Cork - 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 (84%), British Airways (83%), Aer Lingus (83%).
What are the cheapest flights from Ireland to London Heathrow Airport?
On average you can expect to pay £1,274 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 £68.
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

Croydon

Milton Keynes

Hounslow

Deal

Northampton

Gatwick

Slough

Luton

Wembley

Crawley

Eastbourne

Ilford

Watford

Southend-on-Sea

Folkestone

Ipswich

Winchester

Hayes

Maidstone

Swindon

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£56	Average£124	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£69	Average£128	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 £51

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 24/7. 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 27 June 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 27 June 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 27 June 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 27 June 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 27 June 2025.

Reviews of airlines servicing Heathrow

See what other customers who have flown with Aegean Airlines, KLM, andAustrian Airlines 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.

What are the cheapest airlines to fly from Ireland to London Heathrow Airport one-way?

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?

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

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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 27 June 2025.