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Cheap flights from London to Ireland from £21

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 13/12. Fares are subject to change and may not be available on all flights or dates of travel.
LON — DUB
14 Oct — 21 Oct1
1 adult
1 adult, Economy

Cheap flight deals from London to Ireland

Keep the following information in mind while searching for London to Ireland flight deals. Data was last updated 14 September 2025.

Round-trip from

£35

One-way from

£21

Popular in

December

Cheapest in

January

Average price

£53

Good round-trip deal

£37 or less

Good one-way deal

£23 or less
Ryanair
  • Ryanair
  • 2/10-9/10
  • Nonstop
  • 2h 55m total
  • London to Ireland
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Ryanair
  • Ryanair
  • 28/12
  • Nonstop
  • 1h 25m total
  • London to Ireland
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£5 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£3 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from London (LON) to Ireland.
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Price to beat on a one-way flight from London (LON) to Ireland.
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Find flight deals from London to Ireland

Cheapest flights from London to Ireland
Explore the most affordable flight options available from London to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 September 2025.

Thu 2/1008:55LGW - DUB
Nonstop1h 25mRyanair
Thu 9/1016:20DUB - LGW
Nonstop1h 30mRyanair
Deal found 12/9£35
Wed 5/1105:55STN - ORK
Nonstop1h 25mRyanair
Thu 6/1108:30ORK - STN
Nonstop1h 25mRyanair
Deal found 13/9£35
Fri 26/921:05LTN - DUB
Nonstop1h 15mRyanair
Tue 30/907:50DUB - LTN
Nonstop1h 10mRyanair
Deal found 12/9£35
Thu 25/916:50STN - DUB
Nonstop1h 20mRyanair
Sun 28/906:25DUB - STN
Nonstop1h 20mRyanair
Deal found 12/9£35
Fri 10/1022:00LGW - DUB
Nonstop1h 25mRyanair
Mon 13/1019:25DUB - LGW
Nonstop1h 30mRyanair
Deal found 14/9£35
Fri 31/1020:55LTN - DUB
Nonstop1h 15mRyanair
Mon 3/1107:40DUB - LTN
Nonstop1h 15mRyanair
Deal found 12/9£35
Fri 28/1121:45STN - DUB
Nonstop1h 20mRyanair
Sun 30/1108:30DUB - STN
Nonstop1h 20mRyanair
Deal found 12/9£35
Thu 9/1018:25LGW - DUB
Nonstop1h 25mRyanair
Wed 15/1018:45DUB - LGW
Nonstop1h 30mRyanair
Deal found 14/9£36
Fri 17/1008:25STN - ORK
Nonstop1h 25mRyanair
Mon 20/1015:35ORK - STN
Nonstop1h 25mRyanair
Deal found 13/9£36
Fri 28/1105:50LTN - DUB
Nonstop1h 15mRyanair
Sun 30/1106:20DUB - LTN
Nonstop1h 15mRyanair
Deal found 12/9£36
Thu 18/916:50STN - DUB
Nonstop1h 20mRyanair
Mon 22/908:10DUB - STN
Nonstop1h 20mRyanair
Deal found 13/9£36
Thu 2/1008:55LGW - DUB
Nonstop1h 25mRyanair
Sun 5/1007:55DUB - LGW
Nonstop1h 30mRyanair
Deal found 12/9£37

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 14 September 2025.
Use the filters below to find and compare flights from London to Ireland that are best for you.

Fly from

London

Fly to

Ireland

Route

Depart

Return

Price

LondonCork

STN - ORK

STNORK

London Stansted

Sat 8/11

06:15-07:40

Nonstop1h 25m

Cork

Mon 10/11

07:50-09:15

Nonstop1h 25m

£35

LondonDublin

STN - DUB

STNDUB

London Stansted

Fri 31/10

06:30-07:50

Nonstop1h 20m

Dublin

Sat 1/11

15:15-16:35

Nonstop1h 20m

£35

LondonDublin

STN - DUB

STNDUB

London Stansted

Mon 8/12

06:30-07:50

Nonstop1h 20m

Dublin

Mon 8/12

21:40-23:00

Nonstop1h 20m

£35

LondonCork

STN - ORK

STNORK

London Stansted

Wed 5/11

05:55-07:20

Nonstop1h 25m

Cork

Thu 6/11

08:30-09:55

Nonstop1h 25m

£35

LondonDublin

STN - DUB

STNDUB

London Stansted

Fri 28/11

21:45-23:05

Nonstop1h 20m

Dublin

Mon 1/12

08:30-09:50

Nonstop1h 20m

£35

LondonDublin

LTN - DUB

LTNDUB

London Luton

Fri 26/9

21:05-22:20

Nonstop1h 15m

Dublin

Mon 29/9

20:20-21:30

Nonstop1h 10m

£35

LondonDublin

LTN - DUB

LTNDUB

London Luton

Wed 3/12

17:10-18:25

Nonstop1h 15m

Dublin

Sat 6/12

18:55-20:10

Nonstop1h 15m

£35

LondonDublin

LTN - DUB

LTNDUB

London Luton

Fri 7/11

20:55-22:10

Nonstop1h 15m

Dublin

Sun 9/11

06:20-07:35

Nonstop1h 15m

£35

LondonDublin

LTN - DUB

LTNDUB

London Luton

Thu 6/11

09:00-10:15

Nonstop1h 15m

Dublin

Mon 10/11

07:40-08:55

Nonstop1h 15m

£35

LondonDublin

LTN - DUB

LTNDUB

London Luton

Sat 25/10

22:10-23:25

Nonstop1h 15m

Dublin

Sat 1/11

07:40-08:55

Nonstop1h 15m

£35

Flights are sorted by cheapest return flights first.

Deals found on 13/9

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

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

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

Currently, January is the cheapest month in which you can book a flight from London to Ireland (average of £71). Flying from London to Ireland in August is currently the most expensive (average of £93). 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 LON to IE?

Find hourly flight availability from London 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 14 September 2025.

A simple way to save on the total cost of your ticket is to fly from London to Ireland in the evening. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly return from London to Ireland. Price data was last updated on 7 September 2025.

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

Weekly flight availability from London to Ireland

Explore weekly flight availability from London 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 14 September 2025.

The most flights from LON to IE0 are scheduled on a Friday (90 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (47 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 14 September 2025.
Check out reviews from past customers who have flown with Aer Lingus, Ryanair, andBritish Airways from London to Ireland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Overall

7.2

Boarding

7.3

Comfort

7.1

Food

6.5

Crew

8.0

Entertainment

6.9

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
1,271 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Overall

7.2

Boarding

7.3

Comfort

7.1

Food

6.5

Crew

8.0

Entertainment

6.9

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
5,158 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Overall

7.2

Boarding

7.3

Comfort

7.1

Food

6.5

Crew

8.0

Entertainment

6.9

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
7,361 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Overall

7.2

Boarding

7.3

Comfort

7.1

Food

6.5

Crew

8.0

Entertainment

6.9

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
6.2
Okay
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Overall

7.2

Boarding

7.3

Comfort

7.1

Food

6.5

Crew

8.0

Entertainment

6.9

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 London 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 to Ireland?

    Airlines like Ryanair and British Airways fly from London to Ireland in about 1h 20m. The time it takes to get you to your destination is usually consistent. There are 292 mi between London and Ireland. Generally, flights for this route are direct.

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

    The most popular flight routes from London to Ireland are London Heathrow - Dublin, London Gatwick - Dublin and London Luton - Dublin.

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

    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 London to Ireland on time: Air Canada (82%), LATAM Airlines (80%), Qatar Airways (76%).

  • What are the cheapest flights from London to Ireland?

    Looking at all options, your cheapest flight can be booked for £82. While the most popular route (London Heathrow - Dublin) can be booked for £62 on average, our data indicates £715 when flying from London to Ireland.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 to Ireland?

    Currently, January is the cheapest month in which you can book a flight from London to Ireland (average of £71). Flying from London to Ireland in August is currently the most expensive (average of £93). 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

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Alternative routes for London to Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from London to Ireland

Discover the top 3 airlines that operate flights from London 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 14 September 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£26Average£73FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£47Average£168FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£65Average£147FlexibilityNo 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 London to Ireland?

When you search for this flight from London to Ireland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Ireland for you. Better yet — we are completely free to use.

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

Need flexible booking options for your flight to Ireland from London? 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 London to Ireland become cheaper?

Yes! Start tracking prices for London 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.

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