Cheap flights from Porto to London

December is the cheapest month shown for this route, and the rest of the year is worth comparing month by month. Fares usually rise around Christmas and New Year, while midweek departures can be easier on the budget; school holidays also tighten space, so flexible dates help. The route operates all twelve months, so use the price calendar to test your own dates rather than assuming a single season is always cheap.

Ryanair, Malta Air, Ryanair UK, Easyjet, EasyJet Europe and Vueling Airlines are the low-cost names on the listing; TAP Portugal, British Airways and BA EuroFlyer are the full-service names; Portug also appears. Direct flights exist, but not every fare or carrier is nonstop, so read the itinerary before you pay. Budget tickets can charge extra for bags, seats and priority boarding, while full-service fares usually include more, so compare the total cost rather than the headline fare.

London's airports vary from compact to very large, and that size shapes queues, transfers and waiting time. London City is the closest to the centre and the fastest to leave; Heathrow and Gatwick are big hubs with longer walks and passport queues; Luton and Stansted are smaller outer airports that depend on rail or coach links into town. Check which airport your ticket names, because the saving on the fare can disappear in the transfer.

Currency

GBP (£)

Power sockets

Type G · 230 V

Language

English

Emergency number

112, 999

Calling code

+44

Internet domain

.uk

Population of London

8.8 M (2021)

Time zone

UTC+00 (Europe/London)

Country facts: Wikidata

• Check what bags, seats and priority boarding cost on low-cost fares before you compare prices.
• Confirm the exact London airport on your ticket and how you will reach your accommodation.
• Decide whether a nonstop flight matters more than a cheaper connection on separate tickets.
• Check passport and entry requirements for the United Kingdom before you book.
• Compare December with your actual travel month and avoid peak holiday dates if your dates are flexible.