Cheap flights from Ireland to London from £13

The cheapest month to fly to London from Ireland is in September. Flight prices, which tend to average around £72, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Ireland averaging around £81.

Our data shows that Friday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £305. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ireland to London for around £607.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £157. Flights in the afternoon are often more expensive, with an average ticket price of £641.

Fly from Knock Intl to London Luton for the best Ireland - London flight prices

You are more likely to see cheaper flights to London from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £127 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Ireland for as low as £96 on momondo.

There are 4 cabin classes available to choose from on Ireland to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Ryanair, British Airways, and Aer Lingus are the most popular carriers operating from Ireland to London

Ryanair, British Airways and Aer Lingus are the top three most popular airlines that fly to London from Ireland according to our data. Ryanair is the first choice among our users, with 51% of people opting to fly with this airline when travelling to London. Keep in mind that there are 3 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between Ireland and London have experienced a delay on any given week. The average delay length over the past 12 months has been 103 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 13% of their flights experiencing any sort of delay.

The number of flights available between Ireland and London is 57 per day as of October 2026. The most frequent departure time is 07:00, with 47% of daily flights leaving at midday.

As of October 2026, 402 flights take off from Ireland and land in London each week. The most common flight departure day for this route is Wed, with 38% of weekly flights taking off on this day.