Cheap flights from London Heathrow Airport to Dublin from €48

If you aren’t able to travel during the month of January, then book flights to Dublin from London Heathrow Airport during October instead. Flights to Dublin in October, while not as cheap as those in January, still average around €141.

Our data shows that Thursday is the least expensive day to fly to Dublin. Tickets to fly out on this day can be as low as €108. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around €213. 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 Heathrow Airport to Dublin flights are usually those with departure times in the afternoon. Our users have found flights to Dublin in the afternoon for as low as €77. If you have a flexible travel schedule, then try to avoid flying at midday when prices are €161 on average. Flights to Dublin from London Heathrow Airport at midday 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 €153 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 €106 on momondo.

There is only 1 cabin class 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.

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 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. 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 13% of their flights experiencing any sort of delay.

As of September 2026, 50 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 44% of daily flights taking off in the afternoon.

As of September 2026, there are 356 flights per week flying from London Heathrow Airport to Dublin. The most common day of the week flights depart is Mon, with 21% of flights taking off on this day.