Cheap flights from London to Dublin from £21

In general, January is the cheapest month to fly from London to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £52. If you aren’t able to travel to Dublin during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of £62.

On average, the least expensive day to fly to Dublin from London is on a Saturday. momondo users have found tickets for Saturday departures for as low as £104. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around £146. These prices are subject to change though, so be sure to set up a Price Alert for flights to Dublin.

Flying to Dublin from London in the evening is the least expensive time of day to depart. momondo users have found prices as low as £85 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £127 on average. Flights to Dublin from London in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to Dublin from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around £131 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from London for as low as £90 on momondo.

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

Ryanair, British Airways and Aer Lingus are the top three most popular airlines that fly to Dublin from London according to our data. Ryanair is the first choice among our users, with 73% of people opting to fly with this airline when travelling to Dublin. Keep in mind that there are 3 different airlines that fly to Dublin on a routine basis, so you have a few additional options to choose from.

Historically, on average around 19% of flights between London and Dublin have experienced a delay on any given week. The average delay length over the past 12 months has been 105 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon 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. Thursday 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 July 2026, there are 72 flights per day flying from London to Dublin. The most common time of day flights depart is 08:00, with 42% of flights taking off in the afternoon.

As of July 2026, there are 509 flights per week flying from London to Dublin. The most common day of the week flights depart is Wed, with 19% of flights taking off on this day.