Cheap flights from London to Dublin from €21

If you aren’t able to travel during the month of January, then book flights to Dublin from London during October instead. Flights to Dublin in October, while not as cheap as those in January, still average around €85.

Our data shows that Wednesday is the least expensive day to fly to Dublin. Tickets to fly out on this day can be as low as €106. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around €311. These prices are subject to change though, so be sure to set up a Price Alert for flights to Dublin.

Our data shows that the cheapest London to Dublin flights are usually those with departure times in the morning. Our users have found flights to Dublin in the morning for as low as €155. If you have a flexible travel schedule, then try to avoid flying at midday when prices are €160 on average. Flights to Dublin from London at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from London Gatwick 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 €151 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 €111 on momondo.

There are 3 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.

Historically, on average around 18% 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 103 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 13% of their flights experiencing any sort of delay.

68 flights are operational daily from London to Dublin as of May 2026. The most popular departure time for this route is 08:00, with 41% of flights per day taking off in the afternoon.

The number of flights available between London and Dublin is 480 per week as of May 2026. The most frequent departure day is Tue, with 22% of weekly flights leaving on this day.