Cheap flights from Dublin to London from €21

In general, September is the cheapest month to fly from Dublin to London. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around €89. If you are unable to visit London during the month of September, then departing from Dublin during the month January is also very affordable. Most momondo users find prices during this month for around €90.

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 €220. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Dublin to London for around €617.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as €156. In contrast, the most expensive time of day to depart to London is in the afternoon when prices are around €749.

Fly from Dublin to London Luton 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 €152 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 €111 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 and British Airways 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 48% 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.

66 flights are operational daily from Dublin to London as of October 2026. The most popular departure time for this route is 08:00, with 46% of flights per day taking off at midday.

464 flights are operational weekly from Dublin to London as of October 2026. The most popular departure day for this route is Thu, with 23% of flights per week taking off on this day.