London Heathrow
Las Vegas Harry Reid Intl
1 stop
14h 23mLas Vegas Harry Reid Intl
London Heathrow
1 stop
21h 45mFinnair
London Heathrow
Ontario
1 stop
15h 24mOntario
London Heathrow
1 stop
13h 57mBritish Airways
London Heathrow
San Francisco
Nonstop
11h 05mSan Francisco
London Heathrow
1 stop
14h 03mAmerican Airlines
London Heathrow
Ontario
1 stop
15h 59mOntario
London Heathrow
1 stop
14h 15mMultiple Airlines
London Heathrow
Las Vegas Harry Reid Intl
1 stop
15h 09mLas Vegas Harry Reid Intl
London Heathrow
1 stop
13h 16mFinnair
London Heathrow
Las Vegas Harry Reid Intl
1 stop
14h 26mLas Vegas Harry Reid Intl
London Heathrow
1 stop
12h 32mFinnair
London Heathrow
San Francisco
1 stop
24h 51mFinnair
London Heathrow
San Francisco
1 stop
14h 30mAir France
London Heathrow
San Francisco
Nonstop
11h 05mFinnair
London Heathrow
Los Angeles
Nonstop
11h 15mBritish Airways
London Heathrow
San Francisco
Nonstop
11h 05mFinnair
London Heathrow
San Francisco
Nonstop
11h 05mBritish Airways
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.