Cheap flights from London Heathrow Airport to Dublin from $61

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 $142. If you’re not able to fly to Dublin in January, then October is your next best option. Flight prices from London Heathrow Airport to Dublin during October average around $152.

The cheapest day to depart from London Heathrow Airport to Dublin is on a Thursday. Travelers who choose to depart for Dublin on a Thursday will often find tickets for as low as $147. Flights from London Heathrow Airport to Dublin on a Sunday will generally be more expensive and average around $238. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the evening is the cheapest time of day to fly from London Heathrow Airport to Dublin when you can find flight prices for as low as $133. Flying to Dublin in the evening is an ideal time because this is during off-peak travel hours. Flights in the morning are often more expensive with an average ticket price of $201.

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 $175 when searching weeks out. 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 $136 on momondo.

There are 4 cabin classes available to choose from on London Heathrow 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 at night tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 14% of their flights experiencing any sort of delay.

The number of flights available between London Heathrow Airport and Dublin is 42 per day as of March 2026. The most frequent departure time is 8:00AM, with 42% of daily flights leaving at noon.

The number of flights available between London Heathrow Airport and Dublin is 299 per week as of March 2026. The most frequent departure day is Tue, with 19% of weekly flights leaving on this day.