The most frequently used airline companies from Los Angeles to Seattle are generally
Finnair,
East Star Airlines,
KLM,
Air New Zealand,
China Airlines,
Singapore Airlines,
Aer Lingus,
Air France,
Avianca,
Virgin Atlantic,
Korean Air,
El Al Israel Airlines,
British Airways,
Delta Air Lines,
Qatar Airways,
V Australia,
Iberia,
Alaska Airlines,
Lan Airlines,
Alitalia,
Qantas Airways,
Cathay Pacific,
Air Tahiti Nui,
Icelandair,
Aeromexico
are companies.