Porto (OPO) to London (LON): 807 miles (1,298 km) great-circle, about 2h 05m nonstop by our estimate. Cheapest fare observed: $72 round-trip on Ryanair, nonstop, departing May 8, 2026.
$72 round-trip, Ryanair FR1276, departing 2026-05-08 at 21:30, returning 2026-05-13. The recorded itinerary left on a Friday, returning on a Wednesday 5 nights later; the fare was observed 13 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $72, it ranked 3rd of the 30 round-trip fares we recorded from OPO (median $202). That is 8.9 cents per great-circle mile (round-trip price over one-way distance), below the OPO median of 19.7 cents across 30 round-trip routes.
Routes from OPO of similar length: Geneva (813 mi) at $187 and Paris (765 mi) at $105.
Ryanair had the cheapest fare on 17 of 30 OPO routes. It is the 22nd longest of the 30 routes we track from OPO.
Of 49 departure airports with a fare to London, Porto (OPO) ranked 6th at $72. Lowest: $46 from Dublin (DUB); highest: $1356 from Sydney (SYD); 14 nonstop. Cheapest-fare airlines (routes): Ryanair (7), easyJet (4), Etihad (4), Frontier (4), Air Canada (3) and WestJet (3), plus 19 more.
That depends on your passport and trip, so check the official source for United Kingdom: GOV.UK: check if you need a UK visa. Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Europe/Lisbon, Europe/London; flight time is our estimate.