London Heathrow
San Francisco
Nonstop
11h 05mSan Francisco
London Heathrow
1 stop
14h 02mFinnair
London Heathrow
San Francisco
1 stop
15h 32mSan Francisco
London Heathrow
Nonstop
10h 30mAmerican Airlines
London Heathrow
Las Vegas Harry Reid Intl
1 stop
14h 53mLas Vegas Harry Reid Intl
London Heathrow
1 stop
22h 30mMultiple Airlines
London Heathrow
Ontario
1 stop
18h 40mOntario
London Heathrow
1 stop
13h 12mBritish Airways
London Heathrow
San Francisco
1 stop
18h 39mSan Francisco
London Heathrow
1 stop
14h 02mFinnair
London Heathrow
San Francisco
Nonstop
11h 05mSan Francisco
London Heathrow
1 stop
13h 14mAmerican Airlines
London Heathrow
San Francisco
Nonstop
11h 05mBritish Airways
London Heathrow
Las Vegas Harry Reid Intl
1 stop
15h 37mAmerican Airlines
London Heathrow
Los Angeles
Nonstop
11h 15mBritish Airways
London Heathrow
San Francisco
Nonstop
11h 05mBritish Airways
London Heathrow
Las Vegas Harry Reid Intl
2 stops
40h 35mMultiple Airlines
January
£4,133
February
£4,124
March
£7,856
April
£4,695
May
£4,599
June
£4,445
July
£6,910
August
£5,153
September
£6,099
October
£4,784
November
£3,974
December
£5,922
November is currently the cheapest month to fly first class to California. At this moment in time March 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.