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Get United's best fares today on flights from London to San Francisco from *

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Experience United Premium Plus on flights between London and San Francisco

United Premium Plus is our new option that offers more space, comfort and amenities. Seats are more spacious with additional legroom. Travelers can also look forward to upgraded dining, complimentary alcoholic beverages and high-end amenities. Learn more 

Low fare calendar for flights from London (LHR) to San Francisco (SFO)

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*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Looking for additional flights from London to San Francisco?

FromToDatesFare TypePrice

London (LHR)

San Francisco (SFO)

Depart: 04/21/20

Return: 05/02/20

Roundtrip
from
$414*
Viewed:1dayago

London (LHR)

San Francisco (SFO)

Depart: 04/21/20

Return: 05/05/20

Roundtrip
from
$414*
Viewed:1dayago

London (LHR)

San Francisco (SFO)

Depart: 04/17/20

Return: 04/21/20

Roundtrip
from
$414*
Viewed:23hoursago

London (LHR)

San Francisco (SFO)

Depart: 05/08/20

Return: 05/25/20

Roundtrip
from
$423*
Viewed:1dayago

London (LHR)

San Francisco (SFO)

Depart: 04/20/20

Return: 05/02/20

Roundtrip
from
$414*
Viewed:1dayago

London (LHR)

San Francisco (SFO)

Depart: 05/21/20

Return: 05/28/20

Roundtrip
from
$422*
Viewed:6hoursago

London (LHR)

San Francisco (SFO)

Depart: 04/21/20

Return: 04/28/20

Roundtrip
from
$403*
Viewed:6hoursago

London (LHR)

San Francisco (SFO)

Depart: 03/29/20

Return: 04/04/20

Roundtrip
from
$420*
Viewed:5hoursago

London (LHR)

San Francisco (SFO)

Depart: 05/18/20

Return: 05/25/20

Roundtrip
from
$422*
Viewed:3hoursago

London (LHR)

San Francisco (SFO)

Depart: 04/25/20

Return: 05/09/20

Roundtrip
from
$413*
Viewed:2hoursago

*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

Weather in San Francisco

Friday overcast clouds
69°F 02/28/20
Saturday sky is clear
56°F 02/29/20
Sunday sky is clear
55°F 03/01/20
Monday sky is clear
60°F 03/02/20
Tuesday sky is clear
59°F 03/03/20
Wednesday overcast clouds
58°F 03/04/20
Thursday scattered clouds
56°F 03/05/20
Powered by: OpenWeatherMap.org