The most frequently used airline companies from New York to San Francisco are generally
Brussels Airlines,
Lufthansa,
United Airlines,
Azul Linhas Aereas Brasileiras,
Air New Zealand,
Royal Air Maroc,
Gol Linhas Aereas,
Korean Air,
Virgin Atlantic,
Qantas Airways,
British Airways,
Scandinavian Airlines,
Etihad Airways,
Lan Airlines,
All Nippon Airways,
TAP Portugal,
American Airlines,
Alaska Airlines,
Air Pacific,
V Australia,
Asiana Airlines,
JetBlue,
Japan Airlines,
Royal Jordanian,
Emirates,
Kenya Airways,
Singapore Airlines,
El Al Israel Airlines,
Aerolineas Argentinas,
Air Europa,
Austrian,
Alitalia,
Hawaiian Airlines
are companies.