Question 1

What is the cheapest time of day to depart on your flight to Ireland?

Accepted Answer

In the afternoon is the cheapest time of day to fly from London Heathrow Airport to Ireland when you can find flight prices for as low as £137. Flying to Ireland in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Ireland are more costly in the morning, with an average ticket price of £499. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Question 2

What is the most punctual flight time for London to Ireland flights?

Accepted Answer

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.

Question 3

What is the cheapest airline that flies from London Heathrow to Ireland?

Accepted Answer

Aer Lingus and British Airways are the most popular carriers operating from London Heathrow to Ireland

Question 4

How far in advance should I book a flight to Ireland?

Accepted Answer

You are more likely to see cheaper flights to Ireland from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland 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 Ireland from London Heathrow Airport for as low as £95 on momondo.

Question 5

How many flights depart from London Heathrow Airport to Ireland on average per day?

Accepted Answer

78 flights are operational daily from London Heathrow Airport to Ireland as of December 2025. The most popular departure time for this route is 10:00, with 41% of flights per day taking off at midday.

Question 6

How many flights depart from London Heathrow Airport to Ireland on average per week?

Accepted Answer

As of December 2025, 546 flights take off from London Heathrow Airport and land in Ireland each week. The most common flight departure day for this route is Mon, with 18% of weekly flights taking off on this day.

Question 7

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

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.

Question 8

What cabin class options are available on London Heathrow to Ireland flights?

Accepted Answer

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

Question 9

What is the cheapest month to fly to Ireland?

Accepted Answer

The month of January is, on average, the cheapest month to fly to Ireland from London Heathrow Airport, with most prices found around £103. If you’re not able to fly to Ireland in January, then October is your next best option. Flight prices from London Heathrow Airport to Ireland during October average around £111.

Question 10

Which airline has the best punctuality record on London to Ireland flights?

Accepted Answer

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.

Question 11

Can stopping save me money on London Heathrow Airport to Ireland flights?

Accepted Answer

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Ireland.

Question 12

How often are flights from London to Ireland delayed?

Accepted Answer

Historically, on average around 14% of flights between London and Ireland have experienced a delay on any given week. The average delay length over the past 12 months has been 104 minutes.

Question 13

Which airlines fly to Ireland?

Accepted Answer

Aer Lingus, British Airways and Ryanair are the top three most popular airlines that fly to Ireland from London Heathrow Airport according to our data. Aer Lingus is the first choice among our users, with 57% of people opting to fly with this airline when travelling to Ireland. Keep in mind that there are 3 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.

Question 14

What is the cheapest London Heathrow to Ireland flight route?

Accepted Answer

Fly from London Heathrow to Knock Intl for the best London Heathrow - Ireland flight prices

Question 15

What is the cheapest day to depart on your flight to Ireland?

Accepted Answer

The cheapest day to depart on your flight to Ireland is on a Friday when prices can be found for as low as £324. This is often the case because there is less demand to fly during this day of the week. Flights from London Heathrow Airport to Ireland on a Monday will generally be more expensive and average around £517. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Question 16

When did momondo last update prices for flights from London Heathrow Airport to Ireland?

Accepted Answer

Prices for flights from London Heathrow Airport to Ireland were last updated today.

Question 17

How many operators does momondo search for flights from London Heathrow Airport to Ireland?

Accepted Answer

There are 3 operators available for flights from London Heathrow Airport to Ireland as of December 2025.

Question 18

How old do you have to be to fly from London Heathrow Airport to Ireland?

Accepted Answer

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Ireland.

Question 19

What documentation or ID do you need to fly to Ireland?

Accepted Answer

The travel and health documents you'll need for your trip to Ireland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ireland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best price found	£73
Fastest flight time	1h 20m
Direct flights	Every day
Airports in Ireland	77 airports

Airline	Rating	Free Cancellation	Price
Ryanair	PriceFrom £22	Free Cancellation	Rating 6.8 5,222 reviews	Search Ryanair flights
British Airways	PriceFrom £69	Free Cancellation	Rating 6.7 7,583 reviews	Search British Airways flights
Aer Lingus	PriceFrom £79	Free Cancellation	Rating 7.2 1,395 reviews	Search Aer Lingus flights

Cheap flights from London Heathrow Airport to Ireland from £39

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How to get the cheapest flight ticket from London Heathrow Airport to Ireland

What is the cheapest month to fly to Ireland?

What is the cheapest day to depart on your flight to Ireland?

What is the cheapest time of day to depart on your flight to Ireland?

What is the cheapest London Heathrow to Ireland flight route?

Fly from London Heathrow to Knock Intl for the best London Heathrow - Ireland flight prices

How far in advance should I book a flight to Ireland?

What cabin class options are available on London Heathrow to Ireland flights?

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

Can stopping save me money on London Heathrow Airport to Ireland flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Ireland.

What is the cheapest airline that flies from London Heathrow to Ireland?

Aer Lingus and British Airways are the most popular carriers operating from London Heathrow to Ireland

Which airlines fly to Ireland?

How often are flights from London to Ireland delayed?

Historically, on average around 14% of flights between London and Ireland have experienced a delay on any given week. The average delay length over the past 12 months has been 104 minutes.

What is the most punctual flight time for London to Ireland flights?

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.

What day of the week experiences the fewest flight delays on this route?

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.

Which airline has the best punctuality record on London to Ireland flights?

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.

How many flights depart from London Heathrow Airport to Ireland on average per day?

78 flights are operational daily from London Heathrow Airport to Ireland as of December 2025. The most popular departure time for this route is 10:00, with 41% of flights per day taking off at midday.

How many flights depart from London Heathrow Airport to Ireland on average per week?

As of December 2025, 546 flights take off from London Heathrow Airport and land in Ireland each week. The most common flight departure day for this route is Mon, with 18% of weekly flights taking off on this day.

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