Porto (OPO) to Belgrade (BEG): 1,477 miles (2,377 km) great-circle, about 3h 25m nonstop by our estimate. Cheapest fare observed: $361 round-trip on TAP Portugal, with 2 stops, departing May 1, 2026.
$361 round-trip, TAP Portugal TP1929, departing 2026-05-01 at 16:00, returning 2026-05-03. The recorded itinerary left on a Friday, returning on a Sunday 2 nights later; the fare was observed 6 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $361, it ranked 23rd of the 30 round-trip fares we recorded from OPO (median $202). That is 24.4 cents per great-circle mile (round-trip price over one-way distance), above the OPO median of 19.7 cents across 30 round-trip routes.
Routes from OPO of similar length: Warsaw (1,579 mi) at $196 and Vienna (1,321 mi) at $210.
TAP Portugal had the cheapest fare on 2 of 30 OPO routes. It is the 10th longest of the 30 routes we track from OPO.
Of 36 departure airports with a fare to Belgrade, Porto (OPO) ranked 31st at $361. Lowest: $80 from Rome (FCO); highest: $1665 from Buenos Aires (EZE); 11 nonstop. Cheapest-fare airlines (routes): easyJet (6), Wizz Air (6), Vueling (4), Ryanair (3), Wizz Air Malta (3) and Air Serbia (2), plus 10 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Europe/Lisbon, Europe/Belgrade; flight time is our estimate.