Oslo (OSL) to Lisbon (LIS): 1,720 miles (2,769 km) great-circle, about 3h 55m nonstop by our estimate. Cheapest fare observed: $239 round-trip on Ryanair UK, with 1 stop, departing May 16, 2026.
$239 round-trip, Ryanair UK RK1393, departing 2026-05-16 at 14:55, returning 2026-05-17. The recorded itinerary left on a Saturday, returning on a Sunday 1 night later; the fare was observed 21 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $239, it ranked 15th of the 30 round-trip fares we recorded from OSL (median $244). That is 13.9 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: Astrakhan (1,769 mi) at $755 and Antalya (1,829 mi) at $328.
Ryanair UK had the cheapest fare on 5 of 30 OSL routes. It is the 9th longest of the 30 routes we track from OSL.
Of 24 departure airports with a fare to Lisbon, Oslo (OSL) ranked 13th at $239. Lowest: $81 from Madrid (MAD); highest: $1476 from Buenos Aires (EZE); 10 nonstop. Cheapest-fare airlines (routes): easyJet (4), Ryanair (4), Air Europa (2), TAP Portugal (2), Air Canada (1) and Air Serbia (1), plus 10 more.
That depends on your passport and trip, so check the official source for Portugal: European Commission: Schengen visa policy. 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/Lisbon; flight time is our estimate.