London Heathrow
San Francisco
Nonstop
11h 05mSan Francisco
London Heathrow
1 stop
13h 40mAmerican Airlines
London Heathrow
Ontario
1 stop
17h 42mOntario
London Heathrow
1 stop
23h 00mMultiple Airlines
London Heathrow
San Francisco
Nonstop
11h 05mSan Francisco
London Heathrow
Nonstop
10h 30mBritish Airways
London Heathrow
San Francisco
1 stop
15h 58mSan Francisco
London Heathrow
1 stop
13h 17mFinnair
London Heathrow
San Francisco
Nonstop
11h 05mSan Francisco
London Heathrow
Nonstop
10h 30mAmerican Airlines
London Heathrow
Burbank Bob Hope
1 stop
18h 06mBurbank Bob Hope
London Heathrow
1 stop
15h 01mMultiple Airlines
London Heathrow
San Francisco
1 stop
14h 30mAir France
London Heathrow
Los Angeles
Nonstop
11h 15mFinnair
London Heathrow
Ontario
2 stops
20h 03mMultiple Airlines
London Heathrow
San Francisco
Nonstop
11h 05mAmerican Airlines
London Gatwick
San Francisco
1 stop
29h 30mChina Eastern
London Heathrow
San Francisco
Nonstop
11h 05mFinnair
January
£4,133
February
£4,125
March
£4,318
April
£4,695
May
£4,056
June
£4,315
July
£1,212
August
£4,179
September
£3,932
October
£4,784
November
£3,974
December
£5,922
July is currently the cheapest month to fly first class to California. At this moment in time December is the most expensive month. These prices are determined by multiple factors and booking in advance can help keep costs down if your schedule is not as flexible.