San Francisco SFO
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TAP Portugal $302 one way SFO to London Gatwick LGW Nov-Mar

Delta/Virgin Atlantic $579 round trip San Francisco to London LHR Nov 9–May 10

LAX/SFO/LAS fly to Portland/Seattle for cheaper flights to Europe this winter

SAS San Francisco to Norway or Sweden $528-$544 round trip Nov-March

Fare Alert Icelandair SFO/SJC to Brussels or Munich $567-$596 Oct-Dec

All alliances LAX/SFO to Dublin $394-$550 Sep-May

Delta/United LAX to Puerto Rico $275, SAN $297; SFO $303 Sep-Dec

Star Alliance SFO to Dublin $503-$642 Sep-June 15, 2017

SFO-London LGW $200 one way WOW, $219 Norwegian OAK-LGW Oct-March

Cathay Pacific LAX/SFO/BOS/JFK to China many airports $538-$633

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