San Francisco (SFO) to London Heathrow (LHR) cheap flight deal from $449 USD in economy class

TPTAP Portugal

Round Trip•Economy

SFO

San Francisco International Airport

San Francisco, United States

LHR

London Heathrow Airport

London Heathrow, United Kingdom

$787 USD

-43%$449 USD

Verified 1 day ago

October 2025

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29$449 30$561 1$449 2$581 3 4$581 5 6$449 7$449 8$561 9$449 10 11$449 12 13$449 14$449 15$449 16$449 17 18$449 19 20$449 21$449 22$449 23$449 24 25$449 26 27$449 28 29$449 30 31$671 1$551 2

Fair Availability

21% of dates checked are available within 10% of the lowest price

Saturday, October 18th, 2025

8 round-trip options

Returning

Thu, Oct 23, 2025•5 Day Trip

$757 USD

Google Flights

Returning

Fri, Oct 24, 2025•6 Day Trip

$806 USD

Google Flights

Returning

Sat, Oct 25, 2025•7 Day Trip

$806 USD

Google Flights

Returning

Sun, Oct 26, 2025•8 Day Trip

$806 USD

Google Flights

Returning

Mon, Oct 27, 2025•9 Day Trip

$676 USD

Google Flights

Returning

Tue, Oct 28, 2025•10 Day Trip

$449 USD

Google Flights

Returning

Thu, Oct 30, 2025•12 Day Trip

$449 USD

Google Flights

Returning

Fri, Oct 31, 2025•13 Day Trip

$449 USD

Google Flights