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Cheap flights from Ireland to London 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 24/11. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — LON
3 Sep — 10 Sep1
1 adult

Cheap flight deals from Ireland to London

Keep the following information in mind while searching for Ireland to London flight deals. Data was last updated 29 August 2025.

Round-trip from

£41

One-way from

£21

Popular in

August

Cheapest in

January

Average price

£100

Good round-trip deal

£20 or less

Good one-way deal

£15 or less
Ryanair
  • Ryanair
  • 5/11-20/11
  • Nonstop
  • 2h 40m total
  • Ireland to London
Search Deals
Ryanair
  • Ryanair
  • 25/11
  • Nonstop
  • 1h 15m total
  • Ireland to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£2 potential increase over avg. return price).
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 August 2025
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Price to beat on a round-trip flight from Ireland to London (LON).
Search Deals
Price to beat on a one-way flight from Ireland to London (LON).
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Find flight deals from Ireland to London

Cheapest flights from Ireland to London
Explore the most affordable flight options available from Ireland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.

Wed 5/1106:30DUB - STN
Nonstop1h 20mRyanair
Thu 20/1121:30STN - DUB
Nonstop1h 20mRyanair
Deal found 28/8£41
Wed 10/907:50DUB - LGW
Nonstop1h 30mRyanair
Thu 6/1117:45LGW - DUB
Nonstop1h 25mRyanair
Deal found 28/8£41
Thu 2/1014:15DUB - LTN
Nonstop1h 10mRyanair
Sun 5/1009:55LTN - DUB
Nonstop1h 15mRyanair
Deal found 27/8£42
Thu 2/1006:15DUB - LGW
Nonstop1h 30mRyanair
Sun 5/1008:55LGW - DUB
Nonstop1h 25mRyanair
Deal found 27/8£42
Sat 22/1114:10DUB - LTN
Nonstop1h 15mRyanair
Tue 25/1109:00LTN - DUB
Nonstop1h 15mRyanair
Deal found 27/8£43
Sat 13/912:25DUB - LTN
Nonstop1h 10mRyanair
Mon 15/912:50LTN - DUB
Nonstop1h 15mRyanair
Deal found 28/8£44
Thu 2/1006:30DUB - STN
Nonstop1h 20mRyanair
Sun 5/1008:15STN - DUB
Nonstop1h 20mRyanair
Deal found 27/8£44
Wed 3/906:50DUB - LGW
Nonstop1h 30mRyanair
Mon 15/921:30LGW - DUB
Nonstop1h 25mRyanair
Deal found 27/8£44
Tue 14/1020:15DUB - LTN
Nonstop1h 10mRyanair
Wed 15/1010:00LTN - DUB
Nonstop1h 15mRyanair
Deal found 27/8£44
Sat 27/915:45DUB - STN
Nonstop1h 20mRyanair
Sun 28/908:15STN - DUB
Nonstop1h 20mRyanair
Deal found 28/8£44
Sat 4/1018:05DUB - LGW
Nonstop1h 30mRyanair
Sun 5/1008:55LGW - DUB
Nonstop1h 25mRyanair
Deal found 28/8£44
Wed 10/911:25DUB - LTN
Nonstop1h 10mRyanair
Thu 11/908:45LTN - DUB
Nonstop1h 15mRyanair
Deal found 26/8£45

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ireland to London 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 29 August 2025.
Use the filters below to find and compare flights from Ireland to London that are best for you.

Fly from

Ireland

Fly to

London

Route

Depart

Return

Price

DublinLondon

DUB - STN

DUBSTN

Dublin

Wed 5/11

06:30-07:50

Nonstop1h 20m

London Stansted

Thu 20/11

21:30-22:50

Nonstop1h 20m

£41

DublinLondon

DUB - LGW

DUBLGW

Dublin

Wed 10/9

07:50-09:20

Nonstop1h 30m

London Gatwick

Thu 6/11

17:45-19:10

Nonstop1h 25m

£41

DublinLondon

DUB - LTN

DUBLTN

Dublin

Fri 14/11

19:15-20:30

Nonstop1h 15m

London Luton

Mon 17/11

06:00-07:15

Nonstop1h 15m

£42

DublinLondon

DUB - LTN

DUBLTN

Dublin

Thu 2/10

14:15-15:25

Nonstop1h 10m

London Luton

Sun 5/10

09:55-11:10

Nonstop1h 15m

£42

DublinLondon

DUB - LTN

DUBLTN

Dublin

Thu 27/11

07:20-08:35

Nonstop1h 15m

London Luton

Sat 29/11

16:40-17:55

Nonstop1h 15m

£42

DublinLondon

DUB - LGW

DUBLGW

Dublin

Thu 2/10

06:15-07:45

Nonstop1h 30m

London Gatwick

Sun 5/10

08:55-10:20

Nonstop1h 25m

£42

DublinLondon

DUB - LGW

DUBLGW

Dublin

Fri 3/10

19:55-21:25

Nonstop1h 30m

London Gatwick

Mon 6/10

21:30-22:55

Nonstop1h 25m

£42

DublinLondon

DUB - LTN

DUBLTN

Dublin

Sat 22/11

14:10-15:25

Nonstop1h 15m

London Luton

Tue 25/11

09:00-10:15

Nonstop1h 15m

£43

DublinLondon

DUB - LGW

DUBLGW

Dublin

Fri 17/10

19:55-21:25

Nonstop1h 30m

London Gatwick

Mon 20/10

21:30-22:55

Nonstop1h 25m

£43

DublinLondon

DUB - LGW

DUBLGW

Dublin

Mon 20/10

15:40-17:10

Nonstop1h 30m

London Gatwick

Sat 8/11

18:55-20:20

Nonstop1h 25m

£43

Flights are sorted by cheapest return flights first.

Deals found on 25/8

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

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

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

Currently, January is the cheapest month in which you can book a flight from Ireland to London (average of £112). Flying from Ireland to London 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 LON?

Find hourly flight availability from Ireland to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 August 2025.

One of the essential ways to save on airfare from Ireland to London is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 77% on airfare.

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

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

Travellers seeking maximum savings on their Ireland to London flight should consider departing on Tuesday 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

Explore weekly flight availability from Ireland to London. 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 29 August 2025.

The most flights from IE0 to LON are scheduled on a Friday (105 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (42 on average).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 29 August 2025.
Read through reviews of airlines operating flights from Ireland to London, such as Aer Lingus, Ryanair, andBritish Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,240 reviews
Check prices

Comfort

7.1

Boarding

7.3

Crew

8.0

Food

6.5

Entertainment

6.9

Overall

7.2

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
1,240 reviews
Aer Lingus
7.2
Good
1,240 reviews
Check prices

Comfort

7.1

Boarding

7.3

Crew

8.0

Food

6.5

Entertainment

6.9

Overall

7.2

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.
Ryanair
6.8
Okay
5,153 reviews
Aer Lingus
7.2
Good
1,240 reviews
Check prices

Comfort

7.1

Boarding

7.3

Crew

8.0

Food

6.5

Entertainment

6.9

Overall

7.2

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.
British Airways
6.7
Okay
7,320 reviews
Aer Lingus
7.2
Good
1,240 reviews
Check prices

Comfort

7.1

Boarding

7.3

Crew

8.0

Food

6.5

Entertainment

6.9

Overall

7.2

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.

Related info for your journey

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

    For as low as £41, Ryanair can have you in London from Ireland in 1h 20m. Ireland and London are separated by a distance of 292 mi. All flights are typically direct.

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

    £21 is the cheapest one-way deal found within the past few days, from Ryanair. You may also be able to find cheap deals on Aer Lingus and British Airways, with prices starting from £37 and £38, respectively.

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

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

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

    Consider Air Canada (79%), British Airways (74%) or American Airlines (74%) when booking your flight. These represent the most reliable airlines when flying from Ireland to London.

  • What are the cheapest flights from Ireland to London?

    The cheapest flight price from Ireland to London is £54. On average you can expect to pay £1,307. The most popular route, (Dublin - London City), can usually be booked for £119.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ireland to London 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?

    Currently, January is the cheapest month in which you can book a flight from Ireland to London (average of £112). Flying from Ireland to London 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?

Book flights to London if you plan to visit one of these locations
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Alternative routes for Ireland to London

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

Discover the top 3 airlines that operate flights from Ireland to London. 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 29 August 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£26Average£80FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£58Average£135FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£70Average£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 London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Ireland today with Cheapflights!

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

Cheapflights helps you find that perfect flight to London from Ireland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ireland to London, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on Ireland to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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