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San Francisco to London SFO → LGW, LHR, LTN, STN

San Francisco International Airport (SFO) → London Gatwick Airport (LGW), London Heathrow Airport (LHR), London Luton Airport (LTN), Stansted Airport (STN)

The cheapest return found recently is $798 with SAS Scandinavian, 10 Dec – 24 Dec, found today. The cheapest one-way found recently is $299 with Air Canada, 3 Mar 2027, found 4 days ago.

Return

The cheapest return fare on each of 7 departure dates is usually $744 to $948.

Cheapest return found recently

$798

10 Dec – 24 Dec · SAS Scandinavian

San Francisco International Airport (SFO) → London Heathrow Airport (LHR)

Leaves 4:45 p.m. · Return leaves 7:30 p.m. · 42 h 35 min of travel, both ways together

out 1 stop, back 1 stop

found today

See prices for these datesCheck today's price

Cheapest nonstop return

None seen yet.

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Found recently, and the cheapest we hold

Cheapest found recently $798 10 Dec – 24 Decfound todaySee prices for these dates

Cheapest we hold, of any age $647 1 Dec – 8 Decfound 6 days agoSee prices for these dates

What have prices looked like?

Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $647 to $847.

$798, the cheapest return found recently, sits here in that range of $647 to $847.

25 days is a short history, so treat this range as an early guide.

Those were the prices on those days, not today's.

Is this a good return price?

Compared with the cheapest return fare on each of 7 departure dates from 20 Oct to 25 Dec, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.

Could nearby dates be cheaper?

We hold no other 14-night return fares leaving within 3 days of 10 Dec to compare.

Every date we hold

10 fares on 7 departure dates

20 Oct – 27 Nov: $852, found 4 days ago29 Oct – 12 Nov: $1,044, found 5 days ago1 Dec – 8 Dec: $647, found 6 days ago2 Dec – 8 Dec: $690, found 6 days ago10 Dec – 24 Dec: $798, found today11 Dec – 2 Jan 2027: $1,270, found today25 Dec – 14 Jan 2027: $799, found todayOctDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
20 Oct – 27 Nov$852TAP Air PortugalSan Francisco International Airport (SFO) → London Heathrow Airport (LHR)out 1 stop, back 1 stopfound 4 days agoSee prices for these dates
29 Oct – 12 Nov$1,044Air CanadaSan Francisco International Airport (SFO) → London Heathrow Airport (LHR)out 1 stop, back 1 stopfound 5 days agoSee prices for these dates
1 Dec – 8 Dec$647SAS ScandinavianSan Francisco International Airport (SFO) → London Heathrow Airport (LHR)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
2 Dec – 8 Dec$690TAP Air PortugalSan Francisco International Airport (SFO) → London Heathrow Airport (LHR)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
10 Dec – 24 Dec$798SAS ScandinavianSan Francisco International Airport (SFO) → London Heathrow Airport (LHR)out 1 stop, back 1 stopfound todaySee prices for these dates
11 Dec – 2 Jan 2027$1,270United AirlinesSan Francisco International Airport (SFO) → Stansted Airport (STN)out 2 stops, back 2 stopsfound todaySee prices for these dates
25 Dec – 14 Jan 2027$799TAP Air PortugalSan Francisco International Airport (SFO) → London Gatwick Airport (LGW)out 2 stops, back 1 stopfound todaySee prices for these dates

Which month looks cheapest?

December 2026 is the cheapest month — from $647.

October 2026From $8522 departure dates20 Oct – 27 Nov · found 4 days agoSee prices for these dates
December 2026From $647Cheapest seen5 departure dates1 Dec – 8 Dec · found 6 days agoSee prices for these dates

Airlines on the cheapest dates: TAP Air Portugal, SAS Scandinavian, Air Canada, United Airlines.

One-way

The cheapest one-way fare on each of 5 departure dates is usually $299 to $345.

Cheapest one-way found recently

$299

3 Mar 2027 · Air Canada

San Francisco International Airport (SFO) → London Heathrow Airport (LHR)

Leaves 11:30 a.m. · 16 h 20 min trip

1 stop

found 4 days ago

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Cheapest nonstop one-way

None seen yet.

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Found recently, and the cheapest we hold

Cheapest found recently $299 3 Mar 2027found 4 days agoOpen this trip

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 18 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $299 to $575.

At $299, the cheapest one-way found recently is at the low end of that range.

18 days is a short history, so treat this range as an early guide.

Those were the prices on those days, not today's.

Is this a good one-way price?

Compared with the cheapest one-way fare on each of 5 departure dates from 28 Nov to 4 Mar 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.

Could nearby dates be cheaper?

No. We hold one-way fares on 2 other departure dates within 3 days of 3 Mar 2027, and none is cheaper.

Every date we hold

5 fares on 5 departure dates

28 Nov: $364, found 5 days ago11 Dec: $345, found 4 days ago2 Mar 2027: $299, found 4 days ago3 Mar 2027: $299, found 4 days ago4 Mar 2027: $312, found 4 days agoNovDecMar
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
28 Nov$364Aer LingusSan Francisco International Airport (SFO) → London Luton Airport (LTN)1 stopfound 5 days agoOpen this trip
11 Dec$345Aer LingusSan Francisco International Airport (SFO) → London Luton Airport (LTN)1 stopfound 4 days agoOpen this trip
2 Mar 2027$299Air CanadaSan Francisco International Airport (SFO) → London Heathrow Airport (LHR)1 stopfound 4 days agoOpen this trip
3 Mar 2027$299Air CanadaSan Francisco International Airport (SFO) → London Heathrow Airport (LHR)1 stopfound 4 days agoOpen this trip
4 Mar 2027$312jetBlueSan Francisco International Airport (SFO) → London Heathrow Airport (LHR)1 stopfound 4 days agoOpen this trip

Which month looks cheapest?

March 2027 is the cheapest month — from $299.

November 2026From $3641 departure date28 Nov · found 5 days agoOpen this trip
December 2026From $3451 departure date11 Dec · found 4 days agoOpen this trip
March 2027From $299Cheapest seen3 departure dates2 Mar 2027 · found 4 days agoOpen this trip

Airlines on the cheapest dates: Aer Lingus, Air Canada, jetBlue.

Premium cabin fares from San Francisco to London

We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.

Today's prices for 10 Dec – 24 Dec in another cabin: Premium economy · Business · First

Today's prices for 3 Mar 2027 in another cabin: Premium economy · Business · First

How far ahead were prices cheapest for San Francisco to London?

Return

Fares 14 to 29 days before departure were typically 14% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

See these ranges as a table
Typical price in each booking range — round trip, per traveler in Economy.
Booked ahead byTypical fareCheapest dayAbove the cheapestDays of prices
0–6 days$798$669+16%7
7–13 days$750$669+9%16
14–29 days$689$671Cheapest seen18
30–59 days$847$647+23%17
60–89 days$1,158$1,158+68%12
90–179 days$726$726+5%8
180+ days$924$808+34%16

One-way

Not enough history yet: in 18 days of one-way prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.

Could a nearby airport be cheaper?

A different airport at either end can change the fare — sometimes a lot.

Return

Sacramento → London

121 km from San Francisco

$903

$105 more than flying from San Francisco

26 Apr 2027 – 9 May 2027 · SMF → LHR · out 1 stop, back 2 stops

found 3 days ago

Check today's price

San Jose → London

67 km from San Francisco

$1,019

$221 more than flying from San Francisco

16 Nov – 27 Nov · SJC → LHR · out 1 stop, back 1 stop

found 4 days ago

Check today's price

Oakland → London

13 km from San Francisco

$1,203

$405 more than flying from San Francisco

29 Oct – 12 Nov · OAK → LHR · out 1 stop, back 1 stop

found 5 days ago

See this route

Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.

One-way

Oakland → London

13 km from San Francisco

$431

$132 more than flying from San Francisco

3 Mar 2027 · OAK → LHR · 1 stop

found 4 days ago

See this route

San Jose → London

67 km from San Francisco

$570

$271 more than flying from San Francisco

11 Dec · SJC → LHR · 2 stops

found 4 days ago

Check today's price

Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.

Live price for these dates

The cheapest return found recently is for 10 Dec – 24 Dec. A live search on this page shows what those dates cost now, for one adult in economy.

Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work