The most frequently used airline companies from San Francisco to Los Angeles are generally
KLM,
JetBlue,
Westjet,
Alaska Airlines,
Air New Zealand,
Copa Airlines,
Singapore Airlines,
Emirates,
Finnair,
Virgin Atlantic,
Japan Airlines,
American Airlines,
All Nippon Airways,
Air China,
Qantas Airways,
Aer Lingus,
V Australia,
Iberia,
Avianca,
Skywest Airlines,
El Al Israel Airlines,
British Airways,
Delta Air Lines,
Asiana Airlines,
United Airlines,
Hawaiian Airlines,
Aeromexico
are companies.