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Cheap flights from Cardiff to London Heathrow

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Compare Cardiff to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

Book the best London Heathrow fare with no extra fees

Flight deals from Cardiff to London Heathrow

Looking for a cheap last-minute deal or the best return flight from Cardiff to London Heathrow? Find the lowest prices on one-way and return tickets right here.
London.P13,781 per passenger.Departing Mon, 16 Jun, returning Mon, 23 Jun.Return flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departs from Cardiff on Mon, 16 Jun, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Mon, 23 Jun, arriving in Cardiff.Price includes taxes and charges.From P13,781, select.
London.P15,531 per passenger.Departing Tue, 3 Jun, returning Sat, 2 Aug.Return flight with Ryanair and British Airways.Outbound indirect flight with Ryanair, departs from Cardiff on Tue, 3 Jun, arriving in London Heathrow.Inbound indirect flight with British Airways, departs from London Heathrow on Sat, 2 Aug, arriving in Cardiff.Price includes taxes and charges.From P15,531, select.
London.P16,728 per passenger.Departing Thu, 18 Sep, returning Fri, 19 Sep.Return flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departs from Cardiff on Thu, 18 Sep, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Fri, 19 Sep, arriving in Cardiff.Price includes taxes and charges.From P16,728, select.
London.P20,428 per passenger.Departing Mon, 19 May, returning Thu, 29 May.Return flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departs from Cardiff on Mon, 19 May, arriving in London Heathrow.Inbound indirect flight with Aer Lingus, departs from London Heathrow on Thu, 29 May, arriving in Cardiff.Price includes taxes and charges.From P20,428, select.
London.P25,778 per passenger.Departing Thu, 10 Jul, returning Mon, 14 Jul.Return flight with Ryanair and British Airways.Outbound indirect flight with Ryanair, departs from Cardiff on Thu, 10 Jul, arriving in London Heathrow.Inbound indirect flight with British Airways, departs from London Heathrow on Mon, 14 Jul, arriving in Cardiff.Price includes taxes and charges.From P25,778, select.

Find the cheapest month to fly from Cardiff to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Cardiff to London Heathrow flights are currently cheapest in June.
May
from P20,428
Jun
from P13,781
Jul
from P25,778
Aug
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Sep
from P16,728
Oct
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Nov
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Dec
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Jan
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Feb
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Mar
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Apr
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Cardiff to London Heathrow: Alternative routes

Compare routes from Cardiff to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

Cardiff to London: Flight information

The things to know before you go.
Cheapest flight foundP13,781
Cheapest month to flyJune

Finding cheap flights from Cardiff to London Heathrow: Frequently asked questions

The best price we found for a return flight from Cardiff to London Heathrow is P13,781. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Cardiff to London Heathrow. But we found flights with one or more stops from P13,781.
As of May 2025, there are no flights flying from Cardiff to London Heathrow.
The cheapest month to fly from Cardiff to London Heathrow is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Cardiff Airport to London Heathrow Airport on Monday, 16 June 2025.
No airlines currently offer direct flights between Cardiff Airport and London Heathrow Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London Heathrow but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Ryanair offers the cheapest flight tickets to London Heathrow.

Travelling from Cardiff Airport (CWL) to London Heathrow Airport (LHR): what you need to know

  • London's timezone is UTC+0, which is the same as Cardiff.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This way, you can comfortably board your CWL to LHR flight.

  • Be prepared for longer queues during popular months such as June. Arriving up to four hours ahead of international flights and two hours for domestic departures is a wise move.

  • If you'd like to include a stop along the way, just uncheck 'Direct flights only' when searching for your ticket from Cardiff Airport to London Heathrow Airport. Here are the top stopovers between CWL and LHR:

    • Dublin Airport

    • Amsterdam Airport Schiphol

    • George Best Belfast City Airport

How to find the cheapest flights from Cardiff Airport (CWL) to London Heathrow Airport (LHR)

  • The cheapest price we've found for a one-way Cardiff Airport to London Heathrow Airport flight is P6,554. A round-trip fare right now is P13,781. Depending on the availability when you book, these fares can change.

  • To find cheap tickets from CWL to LHR, book ahead. Airlines typically offer lower prices when flights are first made available.

  • The 'Whole month' tool shows you the cheapest flights from Cardiff Airport to London Heathrow Airport across every month. It's a good way to find a bargain if your dates aren't set in stone.

  • Never miss a deal on cheap flights from CWL to LHR by creating a Price Alert. We'll send you an email or push notification on the app when a lower fare pops up.

  • Discover the perfect flight for you with the help of the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Cardiff Airport to London Heathrow Airport, use the 'Sort by' function. You can also filter results by arrival and departure times, airline, and number of stops.

Handy information about Cardiff Airport (CWL)

  • Of all flights departing from Cardiff Airport, 66.16% arrive on time at their destination.

  • To reach Cardiff Airport from central Cardiff, it'll take around 30 minutes by car. Of course, this depends on traffic. It's approximately 27 kilometres from the airport to the city centre.

  • Planning to take public transport? Expect a trip time of around 1 hour 5 minutes.

  • Have an early flight from Cardiff Airport to London Heathrow Airport? Avoid rushing to the terminal (and catch some extra z's) by picking one of these stays close to CWL:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport to the centre of London has a drive time of about 55 minutes. It's approximately 31 kilometres away.

  • Getting there by public transport will take you roughly 1 hour.

When to fly to London Heathrow Airport (LHR)

  • July is the most popular month for flights from Cardiff Airport to London Heathrow Airport. To avoid the crowds, visit London in February.

  • Lock in your flight from Cardiff Airport to London Heathrow Airport for July if you want to visit London during its warmest month. Expect temperatures of between 11ºC (52ºF) and 26ºC (79ºF).

  • January has average temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Look for cheap tickets from CWL to LHR around that time if you'd rather travel in cooler conditions.

Explore more of United Kingdom

  • London is easy to fall in love with, but there are so many other parts of United Kingdom waiting to be discovered. About 161 kilometres north-west of London, a visit to Birmingham will keep your itinerary packed. Start with attractions like Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • If you're ready to explore another well-known destination in United Kingdom, head for Bristol, about 177 kilometres west of London. Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park are the start of reasons to visit.

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Plan the rest of your trip from Cardiff to London

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.