Cheap flights from Dublin to London from £31

In general, January is the cheapest month to fly from Dublin to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £102. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Dublin averaging around £108.

On average, the least expensive day to fly to London Heathrow Airport from Dublin is on a Friday. momondo users have found tickets for Friday departures for as low as £531. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Sunday is £735.

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 £399. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £714 on average. Flights to London Heathrow Airport from Dublin in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 £128 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 £103 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 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 September 2026, there are 64 flights per day flying from Dublin to London Heathrow Airport. The most common time of day flights depart is 12:00, with 48% of flights taking off at midday.

As of September 2026, there are 453 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.