Our cheapest offers for flights from Cardiff to London

Here you can compare cheap flights from Cardiff (CWL) to London (LON) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to London. Prices and availability may change at any time.

	Outbound	Return	Airlines	Baggage	Price
Cardiff London	Outbound 31/03/26 1 Stopover (DUB) FR0635, FR0290 20h 20min	Return 21/04/26 1 Stopover (DUB) FR0210, FR0634 25h 25min	Ryanair	?	£85
Cardiff London Please note: transfer for connecting flight	Outbound 31/03/26 1 Stopover (DUB) FR0635, FR0290 20h 20min	Return 21/04/26 1 Stopover (DUB) FR0271, FR0634 16h 20min	Ryanair		£96
Best option Cardiff London	Outbound 25/05/26 1 Stopover (DUB) FR0635, FR0202 14h 25min	Return 07/06/26 1 Stopover (DUB) FR0256, FR0634 14h 45min	Ryanair	?	£154
Cardiff London	Outbound 19/06/26 1 Stopover (BHD) EI3621, BA8753 07h 00min	Return 05/07/26 1 Stopover (BHD) BA8758, EI3620 15h 35min	Aer Lingus Irish Airlines, British Airways		£422
Cardiff London	Outbound 19/06/26 1 Stopover (BHD, BFS) EI3621, U20035 22h 20min	Return 05/07/26 1 Stopover (DUB) FR0031, FR0634 12h 50min	Aer Lingus Irish Airlines, easyJet	?	£199
Cardiff London	Outbound 25/05/26 1 Stopover (DUB) FR0635, BA4473 22h 25min	Return 07/06/26 1 Stopover (BHD) BA8758, EI3620 15h 35min	Ryanair, British Airways	?	£290
Cardiff London	Outbound 19/06/26 1 Stopover (BHD) EI3621, BA8753 07h 00min	Return 05/07/26 1 Stopover (BHD) BA8758, EI3620 15h 35min	Aer Lingus Irish Airlines, British Airways		£429
Cardiff London	Outbound 25/05/26 1 Stopover (BHD) BA8979, BA8757 04h 05min	Return 07/06/26 1 Stopover (BHD) BA8758, EI3620 15h 35min	British Airways		£444
Cardiff London	Outbound 31/03/26 1 Stopover (BHD) BA8979, BA8757 04h 05min	Return 21/04/26 1 Stopover (BHD) BA8758, BA8978 16h 35min	British Airways		£515
Cardiff London	Outbound 31/03/26 1 Stopover (BHD) BA8979, BA8757 04h 05min	Return 21/04/26 1 Stopover (AMS) KL0984, KL1091 06h 45min	British Airways	?	£581

Tips and tricks to help you find cheap flights from Cardiff to London

Useful information about the flight from Cardiff to London

London - historic and vibrant

London's lively, multicultural vibe entices visitors from around the world to explore and party.

London is great all year round

London is warmest in July and August, but in spring, parks (including of course Hyde Park with its famous Serpentine lake) are a riot of floral colour. In winter, bars and pubs are snug and welcoming. Plenty of holidays and festivals are celebrated in London all year round. Every August Bank Holiday, for example, Notting Hill Carnival comes to North West London. February sees wonderful Chinese New Year celebrations, and in April the London Marathon and the Oxford and Cambridge boat race on the Thames both take place.

What to know before you travel

London is a relatively safe city. However, watch out for pickpockets on busy trains. There is a 'congestion' charge (around £11) for motor vehicles in central London 7am-6pm from Monday to Friday. Visitors should be aware that London tends to be more expensive than other cities in the UK.

Local info: travel and connections

From Heathrow Airport take the Piccadilly tube line from terminals 1, 2 and 3 (the journey to central London takes about half an hour and costs around £6). Or, take the Heathrow Express from Terminal 1, 2 and 3 to Paddington station in 15 mins for around £26. A taxi to the centre is just over £30, with a journey time of around 40 mins. From Gatwick, take the Gatwick express from South Terminal to Victoria Station in around half an hour (cost: around £18). A taxi (from £20) takes about an hour. From Stansted, take the Stansted Express trains to Liverpool Street station in around 45 minutes (from £12). A taxi can cost approximately £100 and takes an hour. From Luton airport there is a shuttle to Luton Airport Parkway then the train to St. Pancras (around £15 in, 40 minutes). Cheap hostels start at around £20/night, hotels are upwards of £40/night. Single public transport tickets cost around £5.70. A day Travelcard works for all transport modes and costs £12-£15. Get an 'Oyster' card for a slight discount on the normal ticket price (refundable deposit of £5).

Important flight information

Flight information: Cardiff - London

Outbound and return from	84,71 £
Distance	221 km
Departure airport	Airport Cardiff (CWL)
Arrival airport	Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Destination country	Flights to United Kingdom

Alternative routes to United Kingdom

Flight Cardiff - Newcastle from 118 £
Flight Cardiff - London Stansted from 85 £
Flight Cardiff - Belfast City from 100 £
Flight Cardiff - London City from 290 £

Alternative flights to London

Popular destinations for onward travel

Flight London - Berlin from 67 £
Flight London - Barcelona from 43 £
Flight London - Cairo from 95 £
Flight London - Majorca from 43 £
Flight London - New York from 283 £
Flight London - Gran Canaria Las Palmas from 62 £
Flight London - Malaga from 15 £
Flight London - Singapore from 268 £
Flight London - Accra from 433 £
Flight London - Bangkok from 193 £

Flight destinations with a similar price

Flight Cardiff - Faro from 53 £
Flight Cardiff - London Stansted from 85 £
Flight Cardiff - Milan from 89 £
Flight Cardiff - Milan-Malpensa from 89 £
Flight Cardiff - Belfast City from 100 £