Cheap flights from London to Dublin from $42

The month of January is, on average, the cheapest month to fly to Dublin from London, with most prices found around $110. If you are unable to visit Dublin during the month of January, then departing from London during the month September is also very affordable. Most momondo users find prices during this month for around $138.

The cheapest day to depart from London to Dublin is on a Sunday. Travellers who choose to depart for Dublin on a Sunday will often find tickets for as low as $144. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from London to Dublin for around $200.

In the evening is the cheapest time of day to fly from London to Dublin when you can find flight prices for as low as $175. 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 $213. Departure times at midday fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Dublin from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around $245 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 for as low as $170 on momondo.

There are 3 cabin classes available to choose from on London to Dublin flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Ryanair and British Airways are the most popular carriers operating from London to Dublin

British Airways, Ryanair and Aer Lingus are the top three most popular airlines that fly to Dublin from London according to our data. British Airways is the first choice among our users, with 46% of people opting to fly with this airline when travelling to Dublin. Keep in mind that there are 3 different airlines that fly to Dublin on a routine basis, so you have a few additional options to choose from.

Historically, on average around 18% 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 in the morning 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. Thursday 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.

The number of flights available between London and Dublin is 52 per day as of September 2026. The most frequent departure time is 08:00, with 42% of daily flights leaving in the afternoon.

As of September 2026, 364 flights take off from London and land in Dublin each week. The most common flight departure day for this route is Wed, with 23% of weekly flights taking off on this day.