So just to reiterate, many of Toronto's foreign flag carriers appear to be merely shuttles that help older Canadians flee their frigid, tundralike winters(brrr) to warmer Caribbean climes, and that's perfectly understandable.
YYR-Toronto Pearson International:35 Foreign Flag Carriers
Aer Lingus: Dublin
Aeroméxico:Mexico City
Air France:Paris–Charles de Gaulle
Alitalia:Rome–Fiumicino
Austrian Airlines: Vienna
Avianca Costa Rica: San José de Costa Rica, San Salvador
Azores Airlines: Lisbon, Ponta Delgada, Porto, Terceira
British Airways: London–Heathrow
Brussels Airlines: Brussels
Caribbean Airlines: Kingston–Norman Manley, Port of Spain
Cathay Pacific: Hong Kong
China Eastern Airlines: Shanghai–Pudong
China Southern Airlines:Guangzhou
Condor Seasonal: Frankfurt
Copa Airlines:Panama City
EgyptAir:Cairo
El Al: Tel Aviv–Ben Gurion
Emirates: Dubai–International
Ethiopian Airlines: Addis Ababa
Etihad Airways: Abu Dhabi
EVA Air: Taipei-Taoyuan
Fly Jamaica Airways:Georgetown–Cheddi Jagan, Kingston–Norman Manley
Hainan Airlines: Beijing–Capital
Icelandair: ReykjavÃk–KeflavÃk
Jet Airways: Amsterdam, Delhi
KLM:Amsterdam
Korean Air: Seoul–Incheon
LOT Polish Airlines:Warsaw–Chopin
Lufthansa:Frankfurt, Munich
Pakistan International Airlines: Islamabad, Karachi, Lahore
Philippine Airlines:Manila
Saudia:Jeddah, Riyadh
TUI Airlines Netherlands:* Amsterdam
Turkish Airlines:Istanbul–Atatürk
WOW Air: ReykjavÃk–KeflavÃk
https://en.m.wikipedia.org/wiki/Toro...tional_Airport
YTZ-Billy Bishop Toronto: 0 Carriers
https://en.m.wikipedia.org/wiki/Billy_Bishop_Airport
SFO-San Francisco International: 37 Foreign Flag Carriers
Aer Lingus: Dublin
Aeroméxico:Guadalajara, Mexico City
Air Berlin:Berlin–Tegel, Düsseldorf
Air China:Beijing–Capital
Air France:Paris–Charles de Gaulle
Air India: Delhi
Air New Zealand: Auckland
All Nippon Airways: Tokyo–Narita
Asiana Airlines:Seoul–Incheon
Avianca El Salvador: San Salvador
British Airways: London–Heathrow
Cathay Pacific: Hong Kong
China Airlines: Taipei–Taoyuan
China Eastern Airlines: Kunming, Qingdao, Shanghai–Pudong
China Southern Airlines: Guangzhou, Wuhan
Copa Airlines: Panama City
Emirates: Dubai–International
Etihad Airways: Abu Dhabi
EVA Air: Taipei–Taoyuan
Fiji Airways:Nadi
Finnair: Helsinki
Japan Airlines: Tokyo–Haneda
KLM: Amsterdam
Korean Air: Seoul–Incheon
Lufthansa: Frankfurt, Munich
Philippine Airlines: Manila
Qantas: Sydney
Scandinavian Airlines: Copenhagen
Singapore Airlines: Hong Kong, Seoul–Incheon, Singapore
Swiss International Air Lines: Zürich
Thomas Cook Airlines: Manchester (UK)
Turkish Airlines:Istanbul–Atatürk
Virgin Atlantic: London–Heathrow, Manchester (UK)
Volaris:Mexico City, Guadalajara
WOW Air: ReykjavÃk–KeflavÃk
XL Airways: Paris–Charles de Gaulle
https//en.m.wikipedia.org/wiki/San_Francisco_International_Airport
SJC San Jose International: 6 Foreign Flag Carriers
Air China: Shanghai-Pudong
All Nippon Airways: Tokyo-Narita
British Airways: London-Heathrow
Hainan Airlines: Beijing-Capital
Lufthansa: Frankfurt
Volaris: Guadalajara
https://en.m.wikipedia.org/wiki/San_...tional_Airport
OAK-Oakland International: 3 Foreign Flag Carriers
Azores Air: Lisbon, Terceira
Norwegian Airlines: Barcelona, Copenhagen, London-Gatwick, Oslo-Gardermoen, Stockholm-Arlanda
Volaris: Guadalajara, Leon/ El Bajio, Mexico City, Morelia, Tijuana
https://en.m.wikipedia.org/wiki/Oakl...tional_Airport
As I said earlier, The world's carriers seem to want a stronger presence in The Bay Area than Toronto. All 3 Bay Area airporys offer long haul international flights offered by foreign flag carriers, British Airways and Lufthansa are at both SFO and SJC.