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Cheap flights from Ireland to London Heathrow Airport 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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — LHR
23 7월 — 30 7월1
1 adult

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 18 7월 2025.

Round-trip from

£74

One-way from

£40

Popular in

July

Cheapest in

January

Average price

£104

Good round-trip deal

£64 or less

Good one-way deal

£59 or less
British Airways
  • British Airways
  • 7/1-19/1
  • Nonstop
  • 3h 00m total
  • Ireland to London
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British Airways
  • British Airways
  • 15/10
  • Nonstop
  • 1h 40m total
  • Ireland to London
Search Deals
Highest demand for flights based on searches. 12% 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 July 2025
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Price to beat on a round-trip flight from Ireland to London Heathrow.
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Price to beat on a one-way flight from Ireland to London Heathrow.
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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 18 7월 2025.

목 28/811:00DUB - LHR
Nonstop1h 30mBritish Airways
토 30/806:15LHR - DUB
Nonstop1h 25mBritish Airways
Deal found 18/7£79
금 5/913:05NOC - LHR
Nonstop1h 25mAer Lingus
화 9/911:05LHR - NOC
Nonstop1h 30mAer Lingus
Deal found 16/7£93
목 11/921:15SNN - LHR
Nonstop1h 25mAer Lingus
월 15/909:50LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 17/7£93
목 14/820:30ORK - LHR
Nonstop1h 15mAer Lingus
수 20/822:25LHR - ORK
Nonstop1h 20mAer Lingus
Deal found 18/7£109
금 15/817:30DUB - LHR
Nonstop1h 25mMultiple Airlines
금 22/806:20LHR - DUB
Nonstop1h 25mMultiple Airlines
Deal found 18/7£116
월 4/821:15SNN - LHR
Nonstop1h 25mMultiple Airlines
화 26/820:40LHR - SNN
1 stop17h 15mMultiple Airlines
Deal found 16/7£153
화 22/707:20ORK - LHR
Nonstop1h 20mBritish Airways
토 26/722:25LHR - ORK
Nonstop1h 20mBritish Airways
Deal found 18/7£161
화 4/1111:55ORK - LHR
Nonstop1h 20mMultiple Airlines
토 8/1116:25LHR - ORK
1 stop7h 00mMultiple Airlines
Deal found 17/7£164
금 12/916:50ORK - LHR
1 stop4h 55mSWISS
월 15/920:05LHR - ORK
1 stop17h 00mSWISS
Deal found 18/7£166
토 16/813:05NOC - LHR
Nonstop1h 25mMultiple Airlines
화 19/811:05LHR - NOC
Nonstop1h 30mMultiple Airlines
Deal found 17/7£178
금 5/910:25KIR - LHR
1 stop8h 30mMultiple Airlines
일 7/922:00LHR - KIR
1 stop12h 00mMultiple Airlines
Deal found 16/7£184
목 28/813:05NOC - LHR
Nonstop1h 25mBritish Airways
금 29/811:05LHR - NOC
Nonstop1h 30mBritish Airways
Deal found 18/7£219

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 18 7월 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

수 7/1

10:20-11:55

Nonstop1h 35m

London Heathrow

월 19/1

06:30-07:55

Nonstop1h 25m

£74

KnockLondon

NOC - LHR

NOCLHR

Knock Intl

금 5/9

13:05-14:30

Nonstop1h 25m

London Heathrow

화 9/9

11:05-12:35

Nonstop1h 30m

£93

ShannonLondon

SNN - LHR

SNNLHR

Shannon

목 11/9

21:15-22:40

Nonstop1h 25m

London Heathrow

월 15/9

09:50-11:20

Nonstop1h 30m

£93

CorkLondon

ORK - LHR

ORKLHR

Cork

목 14/8

20:30-21:45

Nonstop1h 15m

London Heathrow

수 20/8

22:25-23:45

Nonstop1h 20m

£109

DublinLondon

DUB - LHR

DUBLHR

Dublin

금 15/8

17:30-18:55

Nonstop1h 25m

London Heathrow

금 22/8

06:20-07:45

Nonstop1h 25m

£116

ShannonLondon

SNN - LHR

SNNLHR

Shannon

월 4/8

21:15-22:40

Nonstop1h 25m

London Heathrow

화 26/8

20:40-13:55

1 stop17h 15m

£153

CorkLondon

ORK - LHR

ORKLHR

Cork

월 4/8

20:30-21:45

Nonstop1h 15m

London Heathrow

금 8/8

22:25-23:45

Nonstop1h 20m

£161

CorkLondon

ORK - LHR

ORKLHR

Cork

화 4/11

11:55-13:15

Nonstop1h 20m

London Heathrow

토 8/11

16:25-23:25

1 stop7h 00m

£164

CorkLondon

ORK - LHR

ORKLHR

Cork

금 12/9

16:50-21:45

1 stop4h 55m

London Heathrow

월 15/9

20:05-13:05

1 stop17h 00m

£166

KnockLondon

NOC - LHR

NOCLHR

Knock Intl

토 16/8

13:05-14:30

Nonstop1h 25m

London Heathrow

화 19/8

11:05-12:35

Nonstop1h 30m

£178

Flights are sorted by cheapest return flights first.

Deals found on 18/7

Showing 1-10 of 28 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, 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?

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 18 7월 2025.

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?

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 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

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 18 7월 2025.

The most flights from IE0 to LHR are scheduled on a Thursday (81 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

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 18 7월 2025.
See what other customers who have flown with KLM, SWISS, andScandinavian 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.
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,374 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
SWISS
7.5
Good
1,661 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Scandinavian Airlines
7.3
Good
1,426 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Vueling
7.1
Good
1,172 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Aer Lingus
7.1
Good
1,170 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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?

    The cheapet airlines for a one-way flight from Ireland to London Heathrow Airport are British Airways (£40), Aer Lingus (£44), and Scandinavian Airlines (£60).

  • 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 (77%), Aer Lingus (76%).

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

    On average you can expect to pay £1,537 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 £74.

  • 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

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
Hounslow
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Southend-on-Sea
Folkestone
Watford
Winchester
Swindon
Maidstone

Browse thousands of different options on Cheapflights for your next trip

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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 18 7월 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£58Average£127FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£71Average£135FlexibilityNo 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 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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