£20 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 2/10. 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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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

Tue, 7 Oct - Tue, 14 Oct
Ryanair Logo
14:35 - 15:55ORK-LTN
1h 20mdirect
Ryanair Logo
12:50 - 14:10LTN-ORK
1h 20mdirect
£32Ryanair
Find Deal
Thu, 6 Nov - Sun, 9 Nov
Ryanair Logo
20:10 - 21:35ORK-LTN
1h 25mdirect
Ryanair Logo
16:30 - 17:55LTN-ORK
1h 25mdirect
£36Ryanair
Find Deal
Fri, 7 Nov - Mon, 10 Nov
 Logo
22:00 - 23:20DUB-STN
1h 20mdirect
 Logo
10:15 - 11:35STN-DUB
1h 20mdirect
Sat, 8 Nov - Mon, 10 Nov
 Logo
15:15 - 16:35DUB-STN
1h 20mdirect
 Logo
21:45 - 23:05STN-DUB
1h 20mdirect
Thu, 9 Oct - Thu, 16 Oct
Ryanair Logo
19:35 - 20:55DUB-STN
1h 20mdirect
Ryanair Logo
17:50 - 19:10STN-DUB
1h 20mdirect
£49Ryanair
Find Deal
Sat, 6 Dec - Sat, 6 Dec
Ryanair Logo
15:15 - 16:35DUB-STN
1h 20mdirect
Ryanair Logo
20:00 - 21:20STN-DUB
1h 20mdirect
£50Ryanair
Find Deal
Wed, 15 Oct - Wed, 22 Oct
Aer Lingus Logo
13:30 - 14:55DUB-LHR
1h 25mdirect
Aer Lingus Logo
21:10 - 22:30LHR-DUB
1h 20mdirect
£69Aer Lingus
Find Deal
Wed, 10 Dec - Sat, 13 Dec
British Airways Logo
10:20 - 11:55DUB-LHR
1h 35mdirect
British Airways Logo
06:30 - 07:55LHR-DUB
1h 25mdirect
£75British Airways
Find Deal
Wed, 1 Oct - Tue, 7 Oct
Aer Lingus Logo
21:15 - 22:40SNN-LHR
1h 25mdirect
Aer Lingus Logo
19:10 - 20:35LHR-SNN
1h 25mdirect
£75Aer Lingus
Find Deal
Mon, 1 Dec - Fri, 5 Dec
British Airways Logo
10:45 - 12:20DUB-LHR
1h 35mdirect
British Airways Logo
06:30 - 07:55LHR-DUB
1h 25mdirect
£76British Airways
Find Deal

Everything you should know

Top airlines
Ryanair
Most flights • 224 per week
Aer Lingus
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
DUB-LON
Cheapest
ORK-LON
Most popular
Insights
Insights
Insights
Insights
When to book
5 weeks
in advance
Our data shows that travellers who book at least 5 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 34% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
£32
Ryanair
Tue 7/10Tue 14/10
ORK - LTN • Direct
Cheapest one-way flight
£20
Typical prices: £20-35
Ryanair
Thu 2/10
DUB - LTN • Direct
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to London!
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.

In the last 3 days, the cheapest flight deal to London was found on the route from Dublin, at £31 return. The most popular connection is from Cork to London and KAYAK users have found return deals for as low as £32 in the last 3 days.

How much is a flight to London?

The average and cheapest price for all round-trip flights to London from each origin found by users searching on KAYAK in the last month.

A flight to London costs £148 on average. The cheapest price found on KAYAK in the last 2 weeks cost £13 and departed from Dublin. The most popular routes on KAYAK are Dublin to London which costs £184 on average, and Cork to London, which costs £278 on average.

See prices from:

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 £54 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 £100 and £93 respectively. For one-way flights, the best month to travel is May with an average price of £23.

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 Milltown (Kerry) £73 return, from Shannon £79 return, from Cork £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, which saves you about 41% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 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 Southend Airport (SEN), with an average flight price of £134.

Good to know - Cheap tickets from Ireland to London

Low seasonFebruary
Cheapest flight£20
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly (56% more expensive on average)
Flight from Dublin to London Luton Airport

FAQs - booking London flights

  • What is the cheapest flight to London?

    In the last 3 days, the cheapest flight deal to London was found on the route from Dublin, at £31 return. The most popular connection is from Cork to London and KAYAK users have found return deals for as low as £32 in the last 3 days.

  • 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 Dublin 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 £256. On the other hand, the most expensive day to fly is Tuesday, where round-trip prices are £384 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 £156 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 £716.

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 £48 or less one-way and £111 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 1271 reviews
7.1Comfort
6.9Entertainment
6.5Food
8.0Crew
7.3Boarding
Airline reviews

All of my Aer Lingus flights were delayed. The seat I purchased with extra leg room was exactly the same as my previous seat that was free. I would appreciate my money back.

2.0 MediocreAnonymous, Sept 2025DUB - EWR
Read more Aer Lingus reviews

All of my Aer Lingus flights were delayed. The seat I purchased with extra leg room was exactly the same as my previous seat that was free. I would appreciate my money back.

Horrible. I had to wait in Dublin for 4 hours for the next connecting flight which took my to London and than i had to wait 3 hours for the flight to Dusseldorf

It was fine. Not worth the premium price. Overhead bins were so high I could barely reach and no crew offered to help me. Average food. Lounge in Dublin - 51st and green- absolutely appalling. Plagued with hordes of flies, dirty, meager food and beverages. Shameful.

Dear Aer Lingus Customer Care, I am writing to formally raise a complaint regarding my recent experience on Aer Lingus flight EI53 from Dublin to Seattle on 22/08/2025. Both my wife and I were seated in 15D, 15E directly under a faulty air conditioning unit. Even though the unit was switched off, cold air continued seeping through the sides and blew directly onto us for the entire duration of the flight (over 9 hours). We reported the issue to the cabin crew, but the only attempted solution was placing a piece of food-packaging sticker over the vent. Unsurprisingly, this had no effect. When we pressed further, the crew told us: “It is hard to fix it because we don’t have an engineer on board.” As a result, my wife and I remained exposed to constant cold airflow for the whole flight, and both of us became unwell afterwards, experiencing chills, sore throat and fever at the end of the flight. This has caused significant distress, disrupted our work plans. This experience highlights both a serious maintenance issue and a lack of adequate care for passengers. We therefore request: A full investigation into the defective AC system on this aircraft. An explanation of why no effective remedy (such as reseating us) was provided. Compensation for the illness and disruption caused to both myself and my wife. We ask for a full written response within 28 days. Should this matter not be satisfactorily resolved, we are prepared to escalate the complaint to the Irish Aviation Authority and Commission for Aviation Regulation and other relevant authorities. Thank you for your urgent attention to this matter. Sincerely, Temuujin Tuvshingal Myagmarsuren Ganbold

Not JetBlue's fault but Aer Lingus never explained how to transfer to JetBlue.

We had a long delay leaving IOM. No food or drunk service as it is a short flight. Shuttled by bus from terminal to plane with packed in conditions on bus.

The space between seats was reduced even further. Could not even open the tray table fully and got compressed the moment the front guy reclined. For a long haul flight it was extremely uncomfortable.

Not satisfying due to loss Luguage for 4days. Damage Luguage that had no way to fill up a report for and me as a client to spend more money and time to replace it. Thank you for soliciting my opinion, but it was unfortunately a very disappointing experience. Stephanie Zvi

Delightful flight, ahead of time with a super crew, thanks

I wish Aer Lingus offered free wifi and had power outlets at the seats. Overall, the flight was good. Seat back entertainment had some interesting options. Food and snack options were mediocre at best. I enjoyed the canned red wine.

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.

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

The flight was good. It arrived at Heathrow on time but then there was no transport to take us to the terminal. We sat on the plane for an hour waiting for a bus. I will avoid Heathrow if possible in future. The crew were very apologetic.

we had to walk up stairs to get into the plane--no jetways. Perhaps that's a problem not with the airline but with facilities at Heathrow, Glasgow, and Edinburgh. But it was inconvenient.

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

flight was delayed from BWI to London - missed my connecting flight & then connecting flight (also British Air) was delayed - food is awful, TV & movie selection is great

The flight was fine but they made me pay for my carryon bag because they said it was too big at the counter. But it fit under the seat just fine.

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Excellent service by the flight crew, and the food was relatively very good compared to other airlines.

Flight was excellent, staff was great. My first time in first class and it was very relaxing and comfortable.

They can separate the young children from people who want to have a rest. It had lots of crying and loud noises from the children.

I had an awful experience with British Airways as they broke the handle of my checked in suitcase and when I went to complain they told me that this was not their responsibility. This has to be one horrible airline that does not take responsibility for the damage that they have created

Travelling to a place near London?

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

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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