Cheap flights from Ireland to London from £38
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to London departing on 4/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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British Airways flights from Ireland to London Heathrow Airport
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KLM flights from Ireland to London Heathrow Airport
Our best KLM deals on Ireland to London Heathrow Airport flight tickets
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How to get the cheapest flight ticket from Ireland to London Heathrow Airport
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 London Heathrow Airport?
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 £94. The month of September is another great option to travel to London Heathrow Airport, with average flight prices from Ireland averaging around £99.
What is the cheapest day to depart on your flight to London Heathrow Airport?
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 £435. 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 £557.
What is the cheapest time of day to depart on your flight to London Heathrow Airport?
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 £184. 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 £669 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.
What is the cheapest Ireland to London Heathrow flight route?
Fly from Shannon to London Heathrow for the best Ireland - London Heathrow flight prices
How far in advance should I book a flight to London Heathrow Airport?
You are more likely to see cheaper flights to London Heathrow Airport from Ireland when booking 23 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £114 when searching 23 weeks out.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 £73 on momondo.
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.
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 88 per day as of June 2025. The most frequent departure time is 07:00, with 47% of daily flights leaving at midday.
How many flights depart from Ireland to London Heathrow Airport on average per week?
As of June 2025, 618 flights take off from Ireland and land in London Heathrow Airport each week. The most common flight departure day for this route is Thu, with 18% of weekly flights taking off on this day.
Cheap Ireland to London Heathrow Airport flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ireland to London Heathrow Airport
When did momondo last update prices for flights from Ireland to London Heathrow Airport?
Prices for flights from Ireland to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Ireland to London Heathrow Airport?
As of June 2025, there are 2 operators available to choose from for flights from Ireland to London Heathrow Airport.
How old do you have to be to fly from Ireland to London Heathrow Airport?
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.
What documentation or ID do you need to fly to London Heathrow Airport?
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.
What is the most popular plane model from Ireland to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Ireland to London Heathrow Airport is Airbus A321neo (28.91% of total bookings). The next most popular plane models are Airbus A320neo (14.93%), Boeing 787-9 Dreamliner (12.54%), and Boeing 737 MAX 8 (8.84%).
Best airlines flying from Ireland to London Heathrow Airport
Compare and see reviews for airlines that fly from Ireland to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £57 | Free Cancellation | Rating 6.6 7,011 reviews | |||
| PriceFrom £70 | Free Cancellation | Rating 7.1 1,118 reviews |
Travelling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ireland to London?
It is quick and easy to find Ireland to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.
Can I find flights from Ireland to London with flexible booking policies on momondo?
momondo does allow users to show only those flights to London from Ireland which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Ireland to London?
momondo provides multiple filters to help you find the best flight to London from Ireland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Ireland to London right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Ireland to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.