Cheap flights from Dublin to London from $69

The month of January is, on average, the cheapest month to fly to London Heathrow Airport from Dublin, with most prices found around $188. If you aren’t able to travel during the month of January, then book flights to London Heathrow Airport from Dublin during February instead. Flights to London Heathrow Airport in February, while not as cheap as those in January, still average around $196.

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $172. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Dublin to London Heathrow Airport for around $2,162.

In the evening is the cheapest time of day to fly from Dublin to London Heathrow Airport when you can find flight prices for as low as $222. Flying to London Heathrow Airport in the evening is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to London Heathrow Airport is in the afternoon when prices are around $1,220.

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

You are more likely to see cheaper flights to London Heathrow Airport from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $234 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Dublin for as low as $167 on momondo.

Historically, on average around 15% of flights between Dublin and London have experienced a delay on any given week. The average delay length over the past 12 months has been 95 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night 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 May 2026, 61 flights take off from Dublin and land in London Heathrow Airport each day. The most common flight departure time for this route is 12:00, with 48% of daily flights taking off at midday.

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