Air Wisconsin, operating as US Airways Express, was the former feeder airline for US Airways, which was integrated into American Airlines in 2015.
Darwin Airline, operating as Etihad Regional, is an airline of Switzerland based in Lugano, serving regional destinations within Europe. It also operates on behalf of Alitalia from its Italian base in Rome.
Domodedovo Airlines was an airline of Russia based in Moscow which operated scheduled domestic and charter services to holiday destinations in Asia before it ceased operations in 2008.