£15 Find Cheap Flights from Ireland to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to London departing on 13/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
£29
Ryanair
Mon 19/1Tue 20/1
SNN - LGW • Direct
Cheapest direct flights
£28
Ryanair
Sat 24/1Tue 27/1
SNN - LGW • Direct
Top airlines
Ryanair
Most flights • 217 per week
Aer Lingus
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
SNN-LON
Cheapest
DUB-LON
Most popular
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 38% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to London!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ireland to London

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Ireland to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Ireland to London

Mon, 19 Jan - Tue, 20 Jan
Ryanair Logo
15:55 - 17:25
SNN
-
LGW
1h 30mdirect
Ryanair Logo
12:40 - 14:10
LGW
-
SNN
1h 30mdirect
£29Ryanair
Thu, 22 Jan - Mon, 26 Jan
Ryanair Logo
07:50 - 09:15
ORK
-
LGW
1h 25mdirect
Ryanair Logo
11:25 - 12:50
LGW
-
ORK
1h 25mdirect
£30Ryanair
Thu, 5 Feb - Sat, 7 Feb
Ryanair Logo
11:15 - 12:45
SNN
-
LGW
1h 30mdirect
Ryanair Logo
18:30 - 20:00
LGW
-
SNN
1h 30mdirect
£31Ryanair
Wed, 21 Jan - Sat, 24 Jan
Ryanair Logo
09:25 - 10:50
ORK
-
LGW
1h 25mdirect
Ryanair Logo
18:00 - 19:25
LGW
-
ORK
1h 25mdirect
£31Ryanair
Mon, 26 Jan - Tue, 27 Jan
Multiple Airlines Logo
08:30 - 09:50
DUB
-
STN
1h 20mdirect
Multiple Airlines Logo
18:45 - 20:05
STN
-
DUB
1h 20mdirect
£42Multiple Airlines
Wed, 11 Feb - Sat, 21 Feb
British Airways Logo
10:20 - 11:55
DUB
-
LHR
1h 35mdirect
British Airways Logo
06:30 - 07:55
LHR
-
DUB
1h 25mdirect
£65British Airways
Wed, 11 Feb - Mon, 23 Feb
British Airways Logo
13:10 - 14:35
DUB
-
LHR
1h 25mdirect
British Airways Logo
06:30 - 07:55
LHR
-
DUB
1h 25mdirect
£69British Airways
Wed, 11 Feb - Thu, 26 Feb
Aer Lingus Logo
16:05 - 17:20
ORK
-
LHR
1h 15mdirect
Aer Lingus Logo
22:05 - 23:25
LHR
-
ORK
1h 20mdirect
£98Aer Lingus
Wed, 11 Feb - Thu, 26 Feb
Aer Lingus Logo
17:35 - 18:50
ORK
-
LHR
1h 15mdirect
Aer Lingus Logo
19:35 - 21:00
LHR
-
ORK
1h 25mdirect
£100Aer Lingus
Wed, 4 Feb - Wed, 11 Feb
Multiple Airlines Logo
19:55 - 12:10
DUB
-
SEN
16h 15m1 stop
Multiple Airlines Logo
17:20 - 12:40
SEN
-
DUB
19h 20m2 stops
£147Multiple Airlines
Booking Insights

KAYAK's insights & trends for flights to London

Get data-powered insights and trends into flights to London to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to London?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

The flight route Dublin to London was the most popular route on KAYAK over the last 3 days. A return flight could be found for £36. Also in the last 3 days, Shannon was the most budget-friendly place to find a flight to London with one-way tickets at £13 and £29 return.

What is the cheapest month to fly to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to London, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to London is May, where tickets cost £23 on average for one-way flights. On the other hand, the most expensive months are September and June, where the average cost of tickets from Ireland is £184 and £167 respectively. For return trips, the best month to travel is January with an average price of £51.

What is a good deal for flights to London?

If you’re looking for cheap airfare to London, 25% of our users found tickets to London for the following prices or less: From Dublin £57 one-way - £152 return, from Knock £61 one-way - £168 return, from Milltown (Kerry) £84 one-way - £74 return.

How far in advance should I book a flight to London?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to London, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 66 days before departure.

Which is the cheapest airport to fly into in London?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in London is London Stansted Airport, with an average flight price of £83.

Good to know - Cheap tickets from Ireland to London

Low seasonNovember
Cheapest flight£13
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly (3% more expensive on average)
Flight from Shannon to London Gatwick Airport

FAQs - booking London flights

  • What is the cheapest flight to London?

    The flight route Dublin to London was the most popular route on KAYAK over the last 3 days. A return flight could be found for £36. Also in the last 3 days, Shannon was the most budget-friendly place to find a flight to London with one-way tickets at £13 and £29 return.

  • Which London airport is closest to central London?

    There are 6 airports in London. The closest airport to London’s city centre is London City (8 miles). London Heathrow Airport, London Gatwick Airport, and London Luton Airport are 14 miles, 24 miles, and 28 miles from the centre of London, respectively.

  • How much is a flight to London?

    On average, a flight to London costs £148. The cheapest price found on KAYAK in the last 2 weeks cost £13 and departed from Cork Airport.

  • What is the cheapest day to fly to London?

    Based on KAYAK data, the cheapest day to fly to London is Friday where tickets can be as cheap as £248. On the other hand, the most expensive day to fly is Monday, where prices are £390 on average.

  • How does KAYAK find such low prices on flights to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to London?

    The cheapest time of day to fly to London is generally at night, when flights cost £118 on average. The most expensive time of day to fly to London is generally in the evening, which is peak travel time and where the average cost of a ticket is £512.

Top tips for finding cheap flights to London

  • Looking for a cheap flight from Ireland to London? 25% of our users found flights on this route for £52 or less one-way and £143 or less round-trip.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest London flight deals.

Reviews of the top 3 airlines flying from Ireland to London

 
See real verified KAYAK customer reviews for airlines flying to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Ireland to London. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
Aer LingusOverall score based on 1429 reviews
6.9Entertainment
6.6Food
7.1Comfort
8.0Crew
7.4Boarding
Airline reviews

Very nice experience. Flight had good entertainment system and good food options. Customer service was very friendly and nice as well.

10.0 ExcellentSurajit, Jan 2026
DUB - ORD
Read more Aer Lingus reviews

Very nice experience. Flight had good entertainment system and good food options. Customer service was very friendly and nice as well.

Like - the crew were nice Dislike - sitting on the tarmac for long periods after boarding and landing.

I was not admitted to the flight!!! i need a refund for this.

It’s my new favourite airline! Everything was smooth and relaxed!

One of the best flights I've been on in a while. Very genuinely friendly staff. Courteous, kind, respectful. On a past flight (not Aer Lingus) I remember being woken up rudely to put my seat forward. Like a child being berated for something. Oddly jarring experience when someone could just tap you gently on the shoulder and gesture kindly. But I noticed the Aer Lingus staff were incredibly patient with everyone on the plane. It's the holiday season and I noticed a lot more elderly customers on the plane than I typically see flying, and the staff went above and beyond with helping accommodate people. Service throughout the flight was flawless. They came through offering water, and picking up garbage at perfect intervals. Seemed like this flight, everyone was on point. And the flight landed early on top of that

Seats are small, but comfortable and more space around you, so for a normal person the seats are perfect. If you are a big and fat individual, I would not think the seats are comfortable. All else was good and normal. Lots of movies to watch.

Customer service was excellent! The app was terrible, tried several times to check in without success! But the young lady that checked us in was absolutely terrific and helpful.

The same as I stated prior. We incurred extra costs that should be reimbursed, given we were not communicated with about schedule changes.

Experience was great overall. However, the connection time between my flights (1hr 15 mins) was too short. We had to get through security check and US immigration in that time, and I made it to the gate just as they were announcing it was about to close. Flights with such a short connection time should maybe not be offered for purchase, or an advance alert would be helpful. Other than that the in-flight experience was excellent, especially the food. Many thanks!

The seats needs to be comfortables, at least please add more padding to the seats.

Delay in boarding with no explanation why. Stood for about 40 mins waiting to board

Rubbish moved my seat don’t know why same seat configuration cost me extra so me and my wife could sit together now I know why no paper ticket so they can do this

Slow and delayed boarding, including standing outside 15m in -3 temperatures, Late take-off approx 45 mins Very slow bag delivery approx 45 min - no explanation

The flight boarded nice and early and this meant there was no sudden rush at the gate. The only down side was the cabin was very cold 🥶

Flying from Newquay was an absolute dream! Would 100% recommend flights from there!

It would have been better if I was not ill so I didn't go and I didn't come back and I could not transfer my tickets to a later date as Ryanair stop flying from Manchester at the end of October till next year

From boarding to disembarking, the whole operation was very efficient.

Passengers next to me insisted I change seats so they could sit together. I had to frequently move so that when the sear belt sign was on I was in my proper seat! I was returning from helping my mum with my dad's things after his sudden death and didn't feel like arguing with the other passengers.

Flying from Hamburg to Stansted was a nightmare if I have to be honest, the flight was due to leave at 15:50 and we ended up not taking off properly till 16:56. They really don’t have enough people doing the sorting of baggage where you get the sticker for your case before the security check, going through security was 10x more faster then the whole baggage situation.

They boarded us but somehow did not manage to record us boarding, so rather than check if we were onboard they removed our bags from the aircraft. I got a call from Ryanair staff in Dublin when I landed in Madiera asking me where I was!!! When I said I was in Madiera I was told what had happened. Our bags were to be sent to Madiera the next day via Manchester, they didn’t arrive. They are now due to arrive two days before we leave. I don’t see myself using Ryanair again unless I am forced to and even then I may just refuse.

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

I don’t think you’ll like the shoulder require people to pay to reserve seats. Also for the people in the bulkhead row the luggage locker nearest to their seats should be vacant. Both sides were filled with crew or airport items.

Experience was bad. In business class, they ran out of food choices. Luggage was delayed by 2 days in both to and fro flights, ground staff was not helpful, took 3 hours to log the complaint for missing luggage.

We got delayed for 3 hours and. Missed the connection. This is the 3rd time this happened with this airline

5 hour flight with no food or on-board entertainment. Flight crew barely made rounds to provide water.

Staff except one has poor attitude. No cabin crew seen for several hours during the flight in business class. It felt like I was traveling in economy Drinks bad in business class Flight was late for no obvious reasen and I missed my flight to Miami I was put in a 3 star hotel in London although I was traveling in business class. Dinner was aweful at the hotel Overall very poor experience

The transit at Heathrow was an absolute and total nightmare. Absolutely gut wrenchingly horrible and scary. Embarrassing that their National air carrier cannot figure a half decent experience for passengers to transit via London. Shameful.

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Gate agents were late…flight was late and air attendants unhelpful.

Awful it always is unfortunately is the only way to fly direct to london

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Milton Keynes
Eastbourne
Hounslow
Luton
Southend-on-Sea
Slough
Winchester
Croydon
Stansted
Folkestone
Chichester
Maidstone
Colchester
Chelmsford
Crawley
Richmond
Bedford
Watford
Hastings

Everything you need to know for your flight to London

Cabin class types available on flights to London

Cabin classes available on flights to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.