Oslo (OSL) to London (LON): 749 miles (1,206 km) great-circle, about 2h 00m nonstop by our estimate. Cheapest fare observed: $46 round-trip on Ryanair UK, nonstop, departing May 24, 2026.
$46 round-trip, Ryanair UK RK33, departing 2026-05-24 at 14:00, returning 2026-05-31. The recorded itinerary left on a Sunday, returning on a Sunday 7 nights later; the fare was observed 29 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $46, it ranked 2nd of the 30 round-trip fares we recorded from OSL (median $244). That is 6.1 cents per great-circle mile (round-trip price over one-way distance), below the OSL median of 18.6 cents across 30 round-trip routes.
Routes from OSL of similar length: Krakow (777 mi) at $87 and Warsaw (671 mi) at $127.
Ryanair UK had the cheapest fare on 5 of 30 OSL routes. It is the 24th longest of the 30 routes we track from OSL.
Of 49 departure airports with a fare to London, Oslo (OSL) ranked 1st at $46. 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/Oslo, Europe/London; flight time is our estimate.