Cheap flights from London Heathrow Airport to Ireland from £41
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Ireland departing on 28/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London Heathrow Airport to Ireland
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
British Airways flights from London Heathrow Airport to Ireland
Our best British Airways deals on London Heathrow Airport to Ireland flight tickets
SWISS flights from London Heathrow Airport to Ireland
Our best SWISS deals on London Heathrow Airport to Ireland flight tickets
See travel insights to Ireland from
How to get the cheapest flight ticket from London Heathrow Airport to Ireland
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Ireland?
The month of January is, on average, the cheapest month to fly to Ireland from London Heathrow Airport, with most prices found around £104. If you’re not able to fly to Ireland in January, then September is your next best option. Flight prices from London Heathrow Airport to Ireland during September average around £104.
What is the cheapest day to depart on your flight to Ireland?
The cheapest day to depart on your flight to Ireland is on a Tuesday when prices can be found for as low as £125. 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 £538. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Ireland?
In the evening is the cheapest time of day to fly from London Heathrow Airport to Ireland when you can find flight prices for as low as £107. Flying to Ireland in the evening 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 £521. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
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?
You are more likely to see cheaper flights to Ireland from London Heathrow Airport when booking 26 weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around £117 when searching 26 weeks out.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 £84 on momondo.
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.
What is the cheapest airline that flies from London Heathrow to Ireland?
Aer Lingus, British Airways, and Vueling are the most popular carriers operating from London Heathrow to Ireland
Which airlines fly to Ireland?
British Airways, Aer Lingus and Ryanair are the top three most popular airlines that fly to Ireland from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 51% 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.
How many flights depart from London Heathrow Airport to Ireland on average per day?
85 flights are operational daily from London Heathrow Airport to Ireland as of April 2025. The most popular departure time for this route is 09:00, with 39% of flights per day taking off at midday.
How many flights depart from London Heathrow Airport to Ireland on average per week?
As of April 2025, 600 flights take off from London Heathrow Airport and land in Ireland each week. The most common flight departure day for this route is Wed, with 18% of weekly flights taking off on this day.
Cheap London Heathrow Airport to Ireland flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Ireland
When did momondo last update prices for flights from London Heathrow Airport to Ireland?
Prices for flights from London Heathrow Airport to Ireland were last updated today.
How many operators does momondo search for flights from London Heathrow Airport to Ireland?
There are 3 operators available for flights from London Heathrow Airport to Ireland as of April 2025.
How old do you have to be to fly from London Heathrow Airport to Ireland?
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.
What documentation or ID do you need to fly to Ireland?
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.
What is the most popular plane model from London Heathrow Airport to Ireland?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Ireland is Airbus A320neo, representing 12.33% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 11.42%, Boeing 777 at 9.46%, and Airbus A321neo at 7.07%.
Best airlines flying from London Heathrow Airport to Ireland
Compare and see reviews for airlines that fly from London Heathrow Airport to Ireland with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £25 | Free Cancellation | Rating 6.8 5,054 reviews | |||
| PriceFrom £62 | Free Cancellation | Rating 6.6 6,837 reviews | |||
| PriceFrom £77 | Free Cancellation | Rating 7.0 1,076 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from London to Ireland?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Ireland for you.
Can I find flights from London to Ireland with flexible booking policies on momondo?
momondo does allow users to show only those flights to Ireland from London which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from London to Ireland?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Ireland.
I’m not ready to book a flight from London to Ireland right now. Can momondo alert me if prices change?
If you are not ready to book a flight from London to Ireland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ireland and let you know when they change.