Where was Advantage filmed?

1977 film

Advantage (1977) was filmed in Sofia, Burgas and Lovech, 3 places named in its Polish Wikipedia’s Produkcja section, in Bulgaria. Wikidata itself records the shoot only as Bulgaria. Each place says where its claim comes from.

See them on the map → Wikipedia Source data

Places per Polish Wikipedia's Produkcja section

Polish Wikipedia’s Produkcja section names 3 places. Each links to the sentence that says so.

Recorded only at country level

Also filmed in Bulgaria, but the exact places are not known, so they are not on the map.

Filming locations that are mapped there: Bulgaria

Also shot in these places