Athens (ATH) to Lisbon (LIS): 1,783 miles (2,870 km) great-circle, about 4h 05m nonstop by our estimate. Cheapest fare observed: $338 round-trip on Air Serbia, with 1 stop, departing July 14, 2026.
$338 round-trip, Air Serbia JU537, departing 2026-07-14 at 04:30, returning 2026-07-18. The recorded itinerary left on a Tuesday, returning on a Saturday 4 nights later; the fare was observed 80 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $338, it ranked 23rd of the 30 round-trip fares we recorded from ATH (median $173). That is 19.0 cents per great-circle mile (round-trip price over one-way distance), below the ATH median of 28.4 cents across 30 round-trip routes.
Routes from ATH of similar length: Kazan (1,693 mi) at $581 and Ufa (1,883 mi) at $604.
ATH to LIS is the only one of 30 ATH routes where Air Serbia priced cheapest. It is the 2nd longest of the 30 routes we track from ATH.
Of 24 departure airports with a fare to Lisbon, Athens (ATH) ranked 17th at $338. 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.
The reverse, Lisbon (LIS) to Athens (ATH), was $273 round-trip on Vueling, 2 stops, departing May 30, 2026. Lisbon to Athens flights.
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/Athens, Europe/Lisbon; flight time is our estimate.