Flying from San Francisco to London involves comparing options from carriers like Air Canada, American Airlines and United Airlines. Reviewing nonstop and connecting routes before booking helps you understand how different flight times affect the live fares shown above.
From 10 real fares found in our latest check. Prices are per person and can change.
10 real fares from our latest check, cheapest first. Prices are per person and can change until ticketed.
AC
1 stop · 14h 20m · Mon, Oct 26
$5,661
Check availabilityAA
Nonstop · 10h 35m · Mon, Oct 26
$5,681
Check availabilityAA
Nonstop · 10h 25m · Mon, Oct 26
$5,681
Check availabilityAA
Nonstop · 10h 35m · Mon, Oct 26
$5,681
Check availabilityAA
Nonstop · 10h 25m · Mon, Oct 26
$5,681
Check availabilityLowest fare we found for each month we checked. Based on real searches, not a forecast.
Cheapest month found: Dec 2026 from $4,154
Flights on this route are operated by Air Canada, American Airlines and United Airlines. You can fly nonstop to London, which typically takes between 10 hours and 25 minutes and 10 hours and 35 minutes. If you choose a connecting flight, the journey length will increase, with some one-stop routes taking 14 hours and 20 minutes.
Fares on this route shift as the year progresses. Based on recent data, pricing tends to be lowest toward the end of the year, dipping through November and December before rising again in January. You can check the live fares shown above to see how current pricing changes across different travel months.
Flexibility with your departure and return dates is a practical way to manage costs. Comparing nonstop flights against itineraries with one stop can also reveal differences in current pricing. Booking well in advance often provides a wider range of fare options, allowing you to choose a flight that matches your travel budget.
Nonstop options were found for this route, offering a direct flight time of around 10 hours and 25 minutes to 10 hours and 35 minutes. Connecting flights are also available and will extend your total travel time. For example, a flight with one stop can take 14 hours and 20 minutes from departure to arrival.
ASAirspace provides a live fare search with no hidden booking fees. You can compare the options yourself or speak to one of our advisors on the phone if you want help navigating the flight schedules. We focus on showing you the available routes so you can make an informed choice.
Current data shows flights operated by Air Canada, American Airlines and United Airlines.
