LHR

€40 Find Cheap Flights to London Heathrow Airport – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Heathrow departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
Travellers love KAYAK
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Everything you should know

Cheapest return fare
€86
Typical prices: €112-€186
British Airways
Fri 20/11Mon 23/11
DUB - LHR • Direct
Cheapest one-way flight
€40
Typical prices: €65-€125
British Airways
Fri 9/10
DUB - LHR • Direct
Top airlines
Most flights • 142 per week
Best reviews • 7.3 score
Airline reviews
Airline reviews
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+1
Airline reviews
Airline reviews
+1
Top routes
Cheapest
Most popular
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 6 weeks in advance save around 34% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 47% price drop
Most popular
Good to know
Good to know
+1
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Heathrow!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights to Heathrow

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals to Heathrow

Fri, 20 Nov - Mon, 23 Nov
British Airways Logo
20:35 - 21:55
DUB
-
LHR
1h 20mdirect
British Airways Logo
06:30 - 07:55
LHR
-
DUB
1h 25mdirect
€86British Airways
Thu, 15 Oct - Mon, 19 Oct
British Airways Logo
10:30 - 12:00
DUB
-
LHR
1h 30mdirect
British Airways Logo
06:20 - 07:45
LHR
-
DUB
1h 25mdirect
€89British Airways
Fri, 18 Sep - Fri, 25 Sep
British Airways Logo
20:10 - 21:25
DUB
-
LHR
1h 15mdirect
British Airways Logo
06:20 - 07:45
LHR
-
DUB
1h 25mdirect
€90British Airways
Fri, 25 Sep - Sun, 27 Sep
British Airways Logo
20:10 - 21:25
DUB
-
LHR
1h 15mdirect
British Airways Logo
06:20 - 07:45
LHR
-
DUB
1h 25mdirect
€92British Airways
Sun, 13 Sep - Mon, 14 Sep
British Airways Logo
08:35 - 10:10
DUB
-
LHR
1h 35mdirect
British Airways Logo
06:20 - 07:45
LHR
-
DUB
1h 25mdirect
€93British Airways
Thu, 10 Sep - Mon, 14 Sep
British Airways Logo
08:35 - 10:10
DUB
-
LHR
1h 35mdirect
British Airways Logo
06:20 - 07:45
LHR
-
DUB
1h 25mdirect
€94British Airways
Tue, 1 Sep - Wed, 2 Sep
Aer Lingus Logo
13:05 - 14:30
NOC
-
LHR
1h 25mdirect
Aer Lingus Logo
11:05 - 12:35
LHR
-
NOC
1h 30mdirect
€96Aer Lingus
Sat, 22 Aug - Sat, 29 Aug
Aer Lingus Logo
20:30 - 21:45
ORK
-
LHR
1h 15mdirect
Aer Lingus Logo
22:25 - 23:50
LHR
-
ORK
1h 25mdirect
€97Aer Lingus
Sat, 8 Aug - Tue, 11 Aug
Aer Lingus Logo
20:30 - 21:45
ORK
-
LHR
1h 15mdirect
Aer Lingus Logo
22:25 - 23:50
LHR
-
ORK
1h 25mdirect
€99Aer Lingus
Thu, 13 Aug - Mon, 17 Aug
Multiple Airlines Logo
10:40 - 19:25
KIR
-
LHR
8h 45m
1 stop
Multiple Airlines Logo
21:10 - 10:00
LHR
-
KIR
12h 50m
1 stop
€157Multiple Airlines
Booking Insights

KAYAK's insights & trends for flights to Heathrow

Get data-powered insights and trends into flights to Heathrow to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to London Heathrow Airport?

These are the best round-trip prices found by users searching on KAYAK in the last 5 days.

In the last 3 days, the cheapest flight deal to London Heathrow Airport was found on the route from Dublin, at €86 return. The most popular connection is from Cork to London Heathrow Airport and KAYAK users have found return deals for as low as €97 in the last 3 days.

How much is a flight to London Heathrow Airport?

The average and cheapest price for all round-trip flights to London Heathrow Airport from each origin found by users searching on KAYAK in the last month.

A flight to London Heathrow Airport costs €486 on average. The cheapest price found on KAYAK in the last 2 weeks cost €62 and departed from Shannon. The most popular routes on KAYAK are Dublin to London Heathrow Airport which costs €838 on average, and Shannon to London Heathrow Airport, which costs €552 on average.

See prices from:

What is the cheapest day to fly to London?

The average price of all round-trip flights to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.

Based on KAYAK data, the cheapest day to fly to London is Friday where round-trip tickets can be as cheap as €649. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are €771 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to London Heathrow Airport is March, where tickets cost €39 on average for return flights. On the other hand, the most expensive months are September and May, where the average cost of tickets from Ireland is €95 and €92 respectively. For one-way flights, the best month to travel is February with an average price of €16.

What is the cheapest time of day to fly to London Heathrow Airport?

The average price for all round-trip flights to London Heathrow Airport depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to London Heathrow Airport is generally at night, when round-trip flights cost €590 on average. The most expensive time of day to fly to London Heathrow Airport is generally in the evening, which is peak travel time and where the average cost of a ticket is €860.

What is a good deal for flights to London Heathrow Airport?

If you’re looking for cheap airfare to London Heathrow Airport, 25% of our users found tickets to London Heathrow Airport for the following prices or less: From Shannon €189 return, from Cork €203 return, from Knock €274 return.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 6 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know – Book Cheap London Heathrow Airport Plane Tickets

Low seasonJanuary
Cheapest flight€40
Best time to beat the crowds (23% less expensive on average)
Most popular time to fly (8% more expensive on average)
Flight from Dublin to London Heathrow Airport

When to book flights to Heathrow

Are your dates flexible? Find out the best times to travel to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. The information is for flights to London based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs - booking London Heathrow Airport flights

  • What is the cheapest flight to London Heathrow Airport?

    In the last 3 days, the cheapest flight deal to London Heathrow Airport was found on the route from Dublin, at €86 return. The most popular connection is from Cork to London Heathrow Airport and KAYAK users have found return deals for as low as €97 in the last 3 days.

  • How far is London Heathrow Airport from central London?

    The distance between London Heathrow Airport and the city centre of London is 23 km.

  • How much is a flight to London?

    On average, a flight to London costs €486. The cheapest price found on KAYAK in the last 2 weeks cost €62 and departed from Shannon Airport.

  • How does KAYAK find such low prices on flights to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to London Heathrow Airport

  • Looking for cheap airfare to London Heathrow Airport? 25% of our users found return tickets to London Heathrow Airport for the following prices or less: From Shannon €126, from Knock €210, from Dublin €642
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest London Heathrow Airport flight deals.

Reviews of the top airlines flying to Heathrow

 
See real verified KAYAK customer reviews for airlines flying to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Ireland to London. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
Aer LingusOverall score based on 1607 reviews
7.4Boarding
8.1Crew
6.7Food
7.2Comfort
7.0Entertainment
Airline reviews

From Rome to Dublin if you want any refreshments you have to pay for them, Not used to this as we typically get soft drinks and a little snack on a 3hour flight in the US.

8.0 ExcellentAnonymous, Jun 2026
DUB - MCO
Read more Aer Lingus reviews

From Rome to Dublin if you want any refreshments you have to pay for them, Not used to this as we typically get soft drinks and a little snack on a 3hour flight in the US.

Boarding was fine, difficult to understand the guy over the speaker though so we were unsure when exactly to board until they updated the monitor by the gate. Flight itself was fine, nice flight attendants, seats were comfortable enough, good selection of entertainment on the screens. Other airlines at a similar price point have included wifi though, at a minimum messaging, for free, so that was a little disappointing to not have that. But otherwise fine. Food was pretty decent, nice hot meal, good drink selection, nice snacks. Bathrooms were ok, could've been cleaned a little more often, but they were never bad.

Vegetarian food option was very poor. Effectively, overcooked rice ("risotto"). Zero protein which is always disappointing with no vegetables and poorly seasoned. Basically had lots of carbs on 6-hour flight. Not acceptable for business class in 2026. Flight was otherwise very good.

Small plane. Tight seating . What can one say except that it was fast!

Flight crew was very cold and stood around a lot talking to each other.

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

On time, only a little turbulence, very competent and caring attendants. Clear information.

The flights are literally always delayed arriving, boarding and taking off so they are always late for the connection. I planned ahead so I was okay but many others aren't. The food was terrible. The staff was very pleasant. I appreciate boarding back to front.

On a four hour delayed flight now on seats back end of the plane instead front-

My issue is with the SkyWest terminal. The flight was not listed on the main airport flight screen list, and I had to do a Google search to locate the terminal and gate. We had to ask several airport employees where to locate the phantom gate. The airport did not provide adequate signage and was confusing. When we arrived, there was one vendor providing services that quickly closed, leaving zero options for food and drink while we waited hours for our delayed flight. The crew that assisted with check-in and boarding was VERY friendly.

There was an older steward, he is top notch. He is very attentive at the passengers. I do not know his name. Thank you to him.

Good was great. Some of the older crew were grumpy and not customer friendly.

All good, professional service, and arrived close to on time.

Service and food was amazing. Aircraft configuration is weird - stare at a stranger at take off and landing, during flight someone is crawling over your seat. It was lame.

BA Canceled this flight and put us on a flight leaving Aberdeen at 8:00 PM, delaying our return to the states by a full day. The cancellation caused us expenses in both Aberdeen and London and BA was completely unhelpful on the phone and at the airport.

First time flying with them! Loved it! Specially the schedule from Miami and being able to come back directly to New Orleans :)

They lost my luggage on my way to Namibia (I was unable to review that flight as I was in the bush/off line) It took 3 days to get my bag and I had to pay $375.00 to have it transported to my location as it was over 100 Kilometers from that Airport and the local Airlink carrier would not got that far.

Unable to check in online until the morning of flight. No early baggage check available nor any BA personnel present. Poor customer service.

Boarding process was chaotic. Confusion over Boarding gates: gate 55 or gate 56 ???. Unnecessary standing in long lines to board. Better to call out Boarding groups one at a time and everyone else to sit. Airline only has 2 Boarding groups 1-3 and 4-9. That causes over crowding and chaos

Lady next to me was coughing profusely the entire flight, other lady moved seats because of it, 8 hours of that during an overnight flight is a bit much.

Travelling to a place near Heathrow?

Book flights to Heathrow if you plan to visit one of these locations
Stansted
Luton
Wembley
Gatwick
Hounslow
Croydon
Milton Keynes
Ilford
Watford
Eastbourne
Guildford
Hayes
Southend-on-Sea
Swindon
Slough
Ipswich
Northampton
St. Albans
Chelmsford
Richmond

Everything you need to know for your flight to Heathrow

Information on the airport you'll fly into in London