£25 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 19/6. 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

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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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

Tue, 8 Jul - Tue, 15 Jul
Ryanair Logo
07:50 - 09:00DUB-LTN
1h 10mdirect
Ryanair Logo
10:00 - 11:15LTN-DUB
1h 15mdirect
£33Ryanair
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Fri, 11 Jul - Mon, 14 Jul
Ryanair Logo
06:30 - 07:50DUB-STN
1h 20mdirect
Ryanair Logo
06:25 - 07:45STN-DUB
1h 20mdirect
£33Ryanair
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Tue, 8 Jul - Tue, 15 Jul
Ryanair Logo
17:50 - 19:20DUB-LGW
1h 30mdirect
Ryanair Logo
21:35 - 23:00LGW-DUB
1h 25mdirect
£33Ryanair
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Thu, 10 Jul - Thu, 17 Jul
Ryanair Logo
19:35 - 20:55DUB-STN
1h 20mdirect
Ryanair Logo
17:50 - 19:10STN-DUB
1h 20mdirect
£57Ryanair
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Thu, 28 Aug - Tue, 2 Sep
British Airways Logo
08:35 - 10:10DUB-LHR
1h 35mdirect
British Airways Logo
06:20 - 07:45LHR-DUB
1h 25mdirect
£73British Airways
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Wed, 17 Sep - Sat, 20 Sep
British Airways Logo
10:50 - 12:30DUB-LHR
1h 40mdirect
British Airways Logo
14:55 - 16:20LHR-DUB
1h 25mdirect
£74British Airways
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Sat, 26 Jul - Sat, 2 Aug
 Logo
22:05 - 08:00DUB-STN
9h 55m1 stop
 Logo
22:00 - 23:20STN-DUB
1h 20mdirect
Tue, 24 Jun - Thu, 26 Jun
 Logo
08:55 - 10:15DUB-STN
1h 20mdirect
 Logo
17:50 - 19:10STN-DUB
1h 20mdirect
Mon, 23 Jun - Tue, 24 Jun
Aer Lingus Logo
21:15 - 22:40SNN-LHR
1h 25mdirect
Aer Lingus Logo
19:10 - 20:35LHR-SNN
1h 25mdirect
£89Aer Lingus
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Mon, 23 Jun - Tue, 1 Jul
Aer Lingus Logo
21:15 - 22:40SNN-LHR
1h 25mdirect
Aer Lingus Logo
19:10 - 20:35LHR-SNN
1h 25mdirect
£90Aer Lingus
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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 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 January, where tickets cost £53 on average for return flights. On the other hand, the most expensive months are August and December, where the average cost of tickets from Ireland is £93 and £92 respectively. For one-way flights, the best month to travel is May with an average price of £33.

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 Cork £57 return, from Shannon £73 return, from Knock £101 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 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 23 weeks 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 (STN), with an average flight price of £75.

Good to know - Cheap tickets from Ireland to London

Low seasonFebruary
High seasonAugust
Cheapest flight£25
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly (24% more expensive on average)
Flight from Dublin to London Luton Airport

FAQs - booking London flights

  • 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 £141. The cheapest price found on KAYAK in the last 2 weeks cost £8 and departed from Shannon Airport.

  • What is the cheapest day to fly to London?

    Based on KAYAK data, the cheapest day to fly to London is Friday where round-trip tickets can be as cheap as £270. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are £403 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 round-trip flights cost £155 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 £666.

  • How many direct flights to London are there each week?

    Each week there are around 767 direct flights from within Ireland to London. The most common day for departures is Friday, with 17% of flights taking off on this day.

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 £100 or less one-way and £198 or less round-trip.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest London flight deals.

Top 3 airlines serving 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.
7.1
Aer LingusOverall score based on 1117 reviews
6.8Entertainment
7.9Crew
7.0Comfort
7.2Boarding
6.4Food
Airline reviews

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

4.0 OkayLeo, May 2025DUB - LHR
Read more Aer Lingus reviews

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

i used to fly aer Lingus regularly but due to price - poor seating etc i have been using other carriers - i now have aer lingus in my state and the price is always the highest - i have flown to Ireland 11 times in last 24 months and have not used Hartford because of price

Nicest staff I’ve experienced on a plane! Good food, great entertainment, and they gave out little blankets that my kids loved. All in all, great experience.

Unfortunately the flight was delayed for 50 min. Just as we were about to board so that was a drag. The boarding was average. The bag check in process was new to us and efficient. And the flight itself was smooth- basically no turbulence.

I liked how they looked after couples by providing a row of 4 seats if available.

It was ok not that much because I always travel with Emirates airlines, Etihad, airlines, Qatar airlines compare to them food and comfortable was too low . Staff was good . Helpful

Noted in last review. Good to know, though air Lingus on European flights does not offer any food or drink, even though we were on the plane for 3 1/2 hours from Naples to Dublin everything you had to purchase even water.

Seats were alarming close to the row in front of you. I didn’t do the measurements online, which I’m sure they’re available, but it seemed much tighter than other planes, but the airplane itself was well maintained and looked fairly new. My only complaint on the staff was that we’re on an international flight. Normally they give you wine with dinner and the flight attendant decided to pull some strict restrictions and wouldn’t give more than one glass of wine per person, and you could not share with your spouse, which seemed ridiculous when we have four people on the plane with us and only one person ordered wine asked for a second one and she said oh absolutely not. It’s only one per person Which on a transcontinental usually is not the case. They’re very attentive on making sure everyone is as comfortable as possible.

Booked through Kayak, couldnt take flight, Kayak punted to Orbiz, Orbiz punted to Aer Lingus, Aer Lingus said sorry about your luck, try Kayak/Orbiz. Terrible customer service collecting air fares and not even offering a voucher when customers cant take flight

There was no flight. I booked a flight from Toronto to Bordeaux with a stopover in Dublin. I arrived in Dublin and the flight number I had didn't exist and the flight going to Bordeaux I wasn't on. I had to book a new flight with a different airline for later in the day and pay out of pocket.

Flight was over an hour late. Boarding was really messy with long queues at the plane.

Cabin crew couldn’t be less interested. Cabin manager was the most arrogant and the rudest I’ve encountered in many years.

Good but both flights were delayed by nearly one hour making boarding tedious. We had to wait with no information

The worst flight ever. Sitting in plane for 4 hours delay and then they change crew. No water or food offered to any passengers including children in that time. Only 2 toilets out of 3 operating for flight with 200 passengers. Only enough food available for about 7 rows of seats depending where you sat you might be lucky. Cabin crew very unfriendly.

Unnecessarily delayed and remarkably inefficient boarding contributed to a significantly delayed departure. Seats/legroom astonishingly uncomfortable even by Ryanair standards (minimal legroom plus reinforced plastic seat backs ensure you get punched hard in the knees every time the person in front moves, and as a 6-foot passenger I had nowhere else to put my legs. Upon late arrival at the gate in Luton we were kept waiting another 20 minutes before being allowed off the plane. Both Easyjet and Wizzair are currently a better bet.

Awful as usual the air stewardess loved her own voice and would not stop talking on coms for 2hrs please please please shut up I can’t hear my headphones and don’t want to buy juty free

Big delay on run way not much explanation why, missed a important meeting in Dublin, maybe if they did nt persist measuring everyone bag over 2 cm we would have got off on time.

The lady at the boarding gate was so rude. She was challenging people being in priority and looking them up and down as if they weren’t dressed for first class. This was Ryan air priority. We all sit in the same seats. She loudly called out to embarrass a man who she believed had cheated and got in the priority line. He had a valid priority ticket and even worked for Ryanair. Also challenging visas insisting people download them until they proved on the government website it wasn’t required to print. The Ryanair employee who was challenged said she is always like this. She also pulled people from regular boarding as they were fashionably dressed and upgraded them to priority and changed their seats. That was comical. I think she felt she should be working for Emirates first class, although they would t have stood for her rude behaviour

On time boarding, on time departure and early arrival. As it should be. Yes, the comfort and benefits are very poor, but therefore the ticket is 6 times cheaper than with a flag carrier. So I am not complaining about it. You get what you pay for.

The punctuality of f the flight was super: we left on time and arrived about 20 minutes early - and the cabin crew were both friendly and efficient. The only downside was that Ryanair appears to have resumes its old obsession with sizing cabin bags again after a long and welcome absence.

The payment system was not working so was unable to connect wifi the entire flight

The boarding call announcements versus the Staff announcements versus the digital signage board on the out-going and returning flights WERE NOT IN SYNC. I was sent through check and re-checks 3 times. WHY?

Absolutely the worst airline. Can’t find anything positive to say. We were in business which is the same as most airlines coach

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

When checking our bags we were told our bags would go through our final destination. This did not happen. When boarding, after group 3 it was a free for all, everyone boards. When served lunch, I asked for anything without dairy, I was given popcorn and gummy snacks. She said she would come back with more options, she never did. Also, when traveling through London, they don’t tell you your gate number until 1 hour before flight leaves, causing everyone to run to their gate.

Full flight, but crew was great. No wifi and no seatback entertainment, so had to read...argh!

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

The crew did not really interact with me which was no problem as I was fine. I did see that they were somewhat short with some passengers but that was not common. Just in general, they did not seem friendly - no requirement to be so but I am used to a friendly crew on most flights. The food was just ok but with a flight that large, I would think it hard to make something more elaborate.

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

Travelling to a place near London?

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

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.

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