Cheap flights from London Heathrow Airport to Dublin from £45

In general, January is the cheapest month to fly from London Heathrow Airport to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £111. If you aren’t able to travel to Dublin during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of £125.

On average, the least expensive day to fly to Dublin from London Heathrow Airport is on a Saturday. momondo users have found tickets for Saturday departures for as low as £110. 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 £161. 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 Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as £86 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 £141 on average. Flights to Dublin from London Heathrow Airport in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to Dublin from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around £135 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 Heathrow Airport for as low as £95 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to Dublin flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

British Airways is the most popular carrier operating from London Heathrow to Dublin

British Airways, Aer Lingus and Ryanair are the top three most popular airlines that fly to Dublin from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 60% 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 14% 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 106 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. Sunday 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 November 2026, 54 flights take off from London Heathrow Airport and land in Dublin each day. The most common flight departure time for this route is 08:00, with 41% of daily flights taking off at midday.

As of November 2026, 378 flights take off from London Heathrow Airport and land in Dublin each week. The most common flight departure day for this route is Fri, with 19% of weekly flights taking off on this day.