Cheap flights from Dublin to London from $42

The month of January is, on average, the cheapest month to fly to London Heathrow Airport from Dublin, with most prices found around $136. If you’re not able to fly to London Heathrow Airport in January, then February is your next best option. Flight prices from Dublin to London Heathrow Airport during February average around $145.

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 $351. The most expensive day to fly to London Heathrow Airport is Wednesday, with ticket prices averaging around $758.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Dublin to London Heathrow Airport in the evening for as low as $166. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $749.

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 $171 when searching weeks out. 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 $138 on momondo.

There are 4 cabin classes available to choose from on Dublin to London Heathrow Airport 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 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 98 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night 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 Dublin and London Heathrow Airport is 58 per day as of September 2026. The most frequent departure time is 12:00PM, with 48% of daily flights leaving at noon.

As of September 2026, there are 406 flights per week flying from Dublin to London Heathrow Airport. The most common day of the week flights depart is Fri, with 17% of flights taking off on this day.