Original sentence: Air VIA Bulgarian Airways is a charter airline with its head office in Sofia, Bulgaria, operating charter flights on behalf of European tour operators.Most Air VIA flights operate from European destinations into Varna Airport and Burgas Airport, the airline also offers wet lease subservices
Edited sentence: Air VIA Bulgarian Airways is a charter airline with its head office in Sofia, Bulgaria, operating charter flights on behalf of the largest European tour operators, most of them from a broad range of European destinations into Varna Airport and Burgas Airport, as well wet lease subservices