Question 1

What is the cheapest day to depart on your flight to London Heathrow Airport?

Accepted Answer

On average, the least expensive day to fly to London Heathrow Airport from Ireland is on a Friday. momondo users have found tickets for Friday departures for as low as £428. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £579.

Question 2

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

Accepted Answer

The number of flights available between Ireland and London Heathrow Airport is 81 per day as of February 2026. The most frequent departure time is 07:00, with 44% of daily flights leaving at midday.

Question 3

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

Accepted Answer

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

Question 4

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

Accepted Answer

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 Ireland to London Heathrow Airport in the evening for as low as £358. 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 £726 on average. Flights to London Heathrow Airport from Ireland in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Question 5

Which airline has the best punctuality record on Ireland to London 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 6

What is the cheapest month to fly to London Heathrow Airport?

Accepted Answer

In general, January is the cheapest month to fly from Ireland to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £101. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Ireland averaging around £105.

Question 7

How often are flights from Ireland to London delayed?

Accepted Answer

Historically, on average around 15% of flights between Ireland and London have experienced a delay on any given week. The average delay length over the past 12 months has been 94 minutes.

Question 8

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 9

How far in advance should I book a flight to London Heathrow Airport?

Accepted Answer

You are more likely to see cheaper flights to London Heathrow Airport from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £121 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 Ireland for as low as £91 on momondo.

Question 10

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

Accepted Answer

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

Question 11

How long does it take to fly to London Heathrow Airport?

Accepted Answer

If you’re flying from a popular airport in Ireland, such as Cork or Dublin, and flying into London Heathrow Airport, then you can expect flight times to average 1h 15m and 1h 15m, respectively.

Question 12

What is the cheapest Ireland to London Heathrow flight route?

Accepted Answer

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

Question 13

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

Accepted Answer

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

Question 14

What is the most punctual flight time for Ireland to London 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 15

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

Accepted Answer

As of February 2026, 571 flights take off from Ireland and land in London Heathrow Airport each week. The most common flight departure day for this route is Fri, with 17% of weekly flights taking off on this day.

Question 16

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

Accepted Answer

Prices for flights from Ireland to London Heathrow Airport are refreshed on a daily basis.

Question 17

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

Accepted Answer

As of February 2026, there are 2 operators available to choose from for flights from Ireland to London Heathrow Airport.

Question 18

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

Accepted Answer

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ireland to London Heathrow Airport.

Question 19

What documentation or ID do you need to fly to London Heathrow Airport?

Accepted Answer

The travel and health documents you'll need for your trip to London Heathrow Airport 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 London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best price found	£48
Fastest flight time	1h 15m
Direct flights	Every day

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom £71	Free Cancellation	Rating 6.7 7,719 reviews		Search British Airways flights
Aer Lingus	PriceFrom £82	Free Cancellation	Rating 7.2 1,445 reviews		Search Aer Lingus flights

Cheap flights from Ireland to London from £32

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

What is the cheapest month to fly to London Heathrow Airport?

What is the cheapest day to depart on your flight to London Heathrow Airport?

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

What is the cheapest Ireland to London Heathrow flight route?

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

How far in advance should I book a flight to London Heathrow Airport?

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

There are 3 cabin classes available to choose from on Ireland to London Heathrow 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 Ireland to London Heathrow Airport flights?

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

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

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

How often are flights from Ireland to London delayed?

Historically, on average around 15% of flights between Ireland and London have experienced a delay on any given week. The average delay length over the past 12 months has been 94 minutes.

What is the most punctual flight time for Ireland to London 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 Ireland to London 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 Ireland to London Heathrow Airport on average per day?

The number of flights available between Ireland and London Heathrow Airport is 81 per day as of February 2026. The most frequent departure time is 07:00, with 44% of daily flights leaving at midday.

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

As of February 2026, 571 flights take off from Ireland and land in London Heathrow Airport each week. The most common flight departure day for this route is Fri, with 17% of weekly flights taking off on this day.

How long does it take to fly to London Heathrow Airport?

If you’re flying from a popular airport in Ireland, such as Cork or Dublin, and flying into London Heathrow Airport, then you can expect flight times to average 1h 15m and 1h 15m, respectively.

Cheap Ireland to London Heathrow Airport flight deals and tips

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

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

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

What documentation or ID do you need to fly to London Heathrow Airport?

What is the most popular plane model from Ireland to London Heathrow Airport?

Best airlines flying from Ireland to London Heathrow Airport

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