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Find cheap United Airlines flights to San Francisco

CMH — SFO
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags

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Cheapest United Airlines flights from United Kingdom to San Francisco
Explore the most affordable United Airlines flight options available from United Kingdom to San Francisco. Find the lowest fares with prices last updated on 27 July 2026.

Sat 22/806:55
LHR
-
SFO
1 stop15h 25m
United Airlines
Sat 22/819:49
SFO
-
LHR
1 stop30h 21m
United Airlines
Deal found 25/7£458
Mon 24/808:40
LHR
-
SFO
1 stop15h 35m
United Airlines
Mon 7/913:00
SFO
-
LHR
Nonstop10h 25m
United Airlines
Deal found 25/7£489
Tue 25/808:45
LHR
-
SFO
1 stop15h 50m
United Airlines
Mon 31/800:45
SFO
-
LHR
1 stop23h 10m
United Airlines
Deal found 26/7£491

Flights to San Francisco with United Airlines at a glance

Find detailed information about United Airlines flights from United Kingdom to San Francisco. Explore the options provided by United Airlines to plan your journey from United Kingdom to San Francisco. Data last updated 27 July 2026.

Popular in

December

Cheapest in

February

Average price

£547

Return from

£458

One-way from

£405
Highest demand for flights to San Francisco with United Airlines; 1% potential price increase.
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Best time to find cheap flights to San Francisco with United Airlines; 2% potential price drop.
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Average price for flights to San Francisco with United Airlines (return).
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United Airlines
  • United Airlines
  • 22/8-22/8
  • 2 total stops
  • 45h 46m total
  • United Kingdom to San Francisco
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United Airlines
  • United Airlines
  • 27/9
  • Nonstop
  • 11h 00m total
  • United Kingdom to San Francisco
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Cheapflights Insights

Find cheap United Airlines flights to San Francisco

How long is the flight to San Francisco with United Airlines?

On average, United Airlines flights from the United Kingdom to San Francisco take 13 hours 38 minutes. Flights to San Francisco from other popular cities in the United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

United Airlines weekly flight availability to San Francisco

The most flights to San Francisco operated by United Airlines are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

When is the best time to book a flight to San Francisco with United Airlines?

The best time to book a flight to San Francisco with United Airlines is 74 days before departure. On average, fares are higher if you book 39 days before departure.

FAQs about flights to San Francisco with United Airlines

  • Which airport do United Airlines flights arrive at when travelling to San Francisco?

    United Airlines flights on this route tend to land at San Francisco Airport.

  • Is United Airlines the cheapest airline for a flight to San Francisco?

    Flight prices will depend on factors like date, time, and cabin class, so it is worth comparing flights before booking. Based on Cheapflights data, the cheapest average return price for flights to San Francisco tends to be with SWISS.

  • Are there alternative airlines other than United Airlines that fly to San Francisco?

    Virgin Atlantic, British Airways and Lufthansa all fly to San Francisco and offer an alternative to United Airlines.

  • How much is a United Airlines flight to San Francisco?

    The average price for a return flight with United Airlines is £673, while a one-way flight costs around £579.

See more FAQs

Reviews of United Airlines

See what Cheapflights users have to say about their United Airlines experience.
United Airlines
7.4
Good
10,000 reviews
Check prices
Overview

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

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