Cheap flights from Dublin to London from £18

The cheapest month to fly to London from Dublin is in September. Flight prices, which tend to average around £76, 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 Dublin 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 £213. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Dublin to London for around £624.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £175. Flights in the afternoon are often more expensive, with an average ticket price of £651.

Fly from Dublin to London Stansted for the best Dublin - London flight prices

You are more likely to see cheaper flights to London from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £129 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 Dublin for as low as £104 on momondo.

There are 4 cabin classes available to choose from on Dublin 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 Dublin to London

Ryanair, British Airways and Aer Lingus are the top three most popular airlines that fly to London from Dublin according to our data. Ryanair is the first choice among our users, with 53% 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 16% of flights between Dublin 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 14% of their flights experiencing any sort of delay.

As of September 2026, there are 72 flights per day flying from Dublin to London. The most common time of day flights depart is 12:00, with 45% of flights taking off at midday.

As of September 2026, there are 506 flights per week flying from Dublin to London. The most common day of the week flights depart is Fri, with 23% of flights taking off on this day.