Cheap flights from London Heathrow Airport to Dublin from $100

The month of January is, on average, the cheapest month to fly to Dublin from London Heathrow Airport, with most prices found around $202. If you are unable to visit Dublin during the month of January, then departing from London Heathrow Airport during the month October is also very affordable. Most momondo users find prices during this month for around $216.

The cheapest day to depart from London Heathrow Airport to Dublin is on a Tuesday. Travellers who choose to depart for Dublin on a Tuesday will often find tickets for as low as $123. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Dublin for around $204.

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 $105. Flying to Dublin in the evening is an ideal time because this is during off-peak travel hours. Flights to Dublin are more costly at midday, with an average ticket price of $192. Departure times at midday fall within the peak daily travel times, which is why tickets can be more expensive.

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 $249 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 $194 on momondo.

There are 3 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 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 March 2026, 49 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 42% of daily flights taking off at midday.

344 flights are operational weekly from London Heathrow Airport to Dublin as of March 2026. The most popular departure day for this route is Sun, with 19% of flights per week taking off on this day.