Route guide

Cheap Flights from San Francisco to London

Compare live fares, then book straight with the provider. EAZAIR never adds a fee.

SFO to LHR · 10h 15m est.

SFO to LHR
10h 15m nonstop (estimated)

San Francisco to London flight insights

Average flight time

10h 15m

SFO → LHR

Cheapest month

February

Based on cached fare history

Cheapest cached price

$325

Checking live fares…

Prices shown may not be current. Last checked: Oct 4, 2026.

Planning a trip from San Francisco to London? The average flight time on this route is 10h 15m. The lowest fare we recorded on this route recently was $325 (last checked Oct 4, 2026); today's live fare for your dates can differ. February is the cheapest month recorded for this route in our cached fare data.

San Francisco to London at a glance

Route Quick Facts

Quick facts for flights from San Francisco to London on Eazair
Origin	San Francisco (SFO)
Destination	London (LHR)
Average Flight Time	10h 15m
Cheapest Month to Fly	February
Current Lowest Fare	$325
Fares Last Checked	Oct 4, 2026

Flight deals from San Francisco to London

Compare flight deals from San Francisco to London. We search our partner travel sites to find you a good price. Fares on this route are refreshed from our partner network, and you book directly with the provider. EAZAIR never adds a fee.

Airports for San Francisco to London flights

Departure · San Francisco

San Francisco International (SFO)

Pacific Time

Other airports near San Francisco Bay Area: Oakland International (OAK), Norman Y. Mineta San Jose International (SJC)

Arrival · London

Heathrow (LHR)

Other airports near London: Gatwick (LGW), Stansted (STN), Luton (LTN), London City (LCY)

Frequently asked questions

How long is the flight from San Francisco to London?

The average flight time for this route is 10h 15m. Itineraries with a connection usually run longer depending on layover length and airline.

What is the cheapest month to fly to London?

February is the cheapest month recorded for this route in our cached fare data. The lowest fare we recorded on this route recently was $325 (last checked Oct 4, 2026).

Airline bag fees

Baggage allowances differ significantly between fare classes (Basic/Light vs. Standard/Flex) and can change over time. Always verify the exact allowance for your specific fare with the airline before you fly.

Checked bag fees from each airline's own website
Airline	Carry-on, basic economy	1st checked bag	2nd checked bag	Source
American Airlines	Included	$45	$55	aa.com, Sep 24, 2026
United Airlines	Not included	$40	$50	united.com, Sep 24, 2026
Delta Air Lines	Included	$45	$55	delta.com, Sep 24, 2026
Southwest Airlines	Included	$45	$55	southwest.com, Oct 27, 2026
JetBlue	Included	$45	$59	jetblue.com, Sep 24, 2026
Alaska Airlines	Included	$45	$55	alaskaair.com, Sep 24, 2026
Frontier Airlines	Not included	Varies	Varies	flyfrontier.com, Sep 24, 2026
Sun Country Airlines	Not included	Varies	Varies	suncountry.com, Sep 24, 2026

Domestic US fees per bag, each way, when paid online in advance. "Varies" means the airline prices bags by route and date.

Travel tips

Arrive early for domestic flights

TSA generally recommends arriving at least 2 hours before a domestic departure, more at larger hub airports during peak travel periods.

Pack a mixed carry-on

Keep a change of clothes, chargers, and any essentials in your carry-on rather than only your checked bag, in case of a delay or a bag that doesn't arrive with you.

Ease jet lag on longer routes

On longer cross-country flights, adjusting your sleep schedule a day or two before departure and staying hydrated in flight can reduce jet lag on arrival.

Screenshot your confirmation

Save a screenshot or PDF of your booking confirmation and boarding pass before you travel, in case you lose signal or battery at the airport.

Check in online when it opens

Most airlines open online check-in 24 hours before departure. Checking in early can help with seat selection and, on some airlines, boarding group assignment.