€37 Cheap flights to London Heathrow Airport
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to London Heathrow Airport departing on 23/9. 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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Not ready to book? to track prices.Find the cheapest flights from Ireland to London Heathrow Airport
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Flights to London Heathrow Airport – Travel Insights & Trends
Get data-powered insights and trends for flights to London Heathrow Airport to help you craft the best travel plan.
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.
What is the cheapest day to depart on your flight to London Heathrow Airport?
The cheapest day to depart on your flight to London Heathrow Airport is on a Friday when prices can be found for as low as €457. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travellers. As a result, prices tend to be around €665.
What is the cheapest month to fly to London Heathrow Airport?
The month of September is another great option to travel to London Heathrow Airport, with average flight prices from Ireland averaging around €117.
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 €155. 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 €762 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 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?
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 €135 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 €86 on momondo.
How long does it take to fly to London Heathrow Airport?
Flight times vary depending on what airport in Ireland you fly out of and what airport in London Heathrow Airport you fly into. For example, flying from Dublin to London Heathrow takes 1h 20m on average. On the other hand, flying from Cork to London Heathrow takes 1h 15m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo to see if there are any available for your route.
How many flights depart from Ireland to London Heathrow Airport on average per day?
As of June 2025, there are 92 flights per day flying from Ireland to London Heathrow Airport. The most common time of day flights depart is 07:00, with 47% of flights taking off at midday.
Cheapest flights to London Heathrow
Find the cheapest flights to London Heathrow from your nearest city or airport
| CHEAPEST MONTH TO FLY TO LONDON HEATHROW AIRPORT FROM DUBLIN | January | 18% cheaper | Flying from Dublin to London Heathrow Airport costs on average just €111 in January |
| MOST EXPENSIVE MONTH TO FLY TO LONDON HEATHROW AIRPORT FROM DUBLIN | June | 12% more expensive | It costs about €152 for flights to London Heathrow Airport from Dublin in June |
| MOST POPULAR MONTH TO FLY TO LONDON HEATHROW AIRPORT FROM DUBLIN | August | 207% more users visited | More momondo users searched in flights to London Heathrow Airport from Dublin in August than any other month |
Cheap London Heathrow Airport flight deals and tips
Summary info about London Heathrow Airport flight prices, duration and airlines
Best One-Way Price | €37 |
|---|---|
Best Round-Trip Price | €86 |
Fastest flight time | 1h 15m |
Popular in | June |
Frequently asked questions about flying to London Heathrow Airport
What is the cheapest month to fly to London Heathrow Airport?
In general, when booking your flight to London Heathrow Airport, January is the cheapest month on average.
How far in advance should I book a flight to London Heathrow Airport?
From most locations, booking your flights to London Heathrow Airport around 48 days prior to your departure date finds the best deals.
What is the cheapest day to depart on your flight to London Heathrow Airport?
On average, the cheapest flights to London Heathrow Airport are found when departing on a Friday. Try to avoid departing on a Sunday, as this is usually the most expensive day.
What is the cheapest time of day to fly to London Heathrow Airport?
Our data shows that the cheapest London Heathrow Airport flights are usually those with Evening departure times. Afternoon flights are often costlier.
Is there an alternative airport near London Heathrow Airport?
Finding an alternative and possibly cheaper destination airport near London Heathrow Airport is possible. If you are planning a flight to London Heathrow Airport, consider booking flights to London City Airport (12 km from London city centre), London Gatwick Airport (38 km from London city centre), London Luton Airport (45 km from London city centre), London Stansted Airport (50 km from London city centre) or London Southend Airport (57 km from London city centre).
Is there a cheaper alternative to flying into London?
Prices vary based on where travellers are departing from, but on average, the cheapest airport to fly to in London is London Stansted Airport where the average price is €98. Users typically find the best prices when using momondo’s Airport-to-Airport Pricing Tool.
What is the absolute cheapest flight to London?
In the past two weeks, users have booked deals to London for €14/person, which is 97% cheaper than the average flight to London. To find the cheapest price to London from your area, use momondo’s Airport-to-Airport Pricing Tool.
When did momondo last update prices for flights to London Heathrow Airport?
Prices for flights to London Heathrow Airport were last updated today.
How many operators does momondo search for flights to London Heathrow Airport?
The number of operators available for flights to London Heathrow Airport is 3 as of June 2025.
How old do you have to be to fly to London Heathrow Airport?
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 to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Travelling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal to London?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London.
Can I find flights to London with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for flights to London to just show those with flexible booking policies.
How can momondo help me find flights to London?
momondo helps you find the best flight to London by providing filters to narrow your choice of flights to those matching your criteria. You can select fights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight to London right now. Can momondo alert me if prices change?
Yes. momondo can track flight prices for London and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.