Cheap flights from San Francisco to London Heathrow

Q: What are the cheapest airlines?

Air Canada, JetBlue, British Airways, Delta Air Lines, KLM. These airlines usually offer the cheapest flights from San Francisco to London Heathrow.

Q: Can I fly direct to London Heathrow?

Delta Air Lines, KLM, Virgin Atlantic, Finnair, British Airways. You can fly non-stop from San Francisco to London Heathrow with these airlines.

Q: What airlines fly indirectly?

Air Canada, Lufthansa, JetBlue. These airlines fly from San Francisco to London Heathrow, but you’ll have at least one layover.

Q: How long is the flight?

10 hrs 15 mins. This is the shortest flight time from San Francisco to London Heathrow.

from as little as £458

14 nights in London, departing San Francisco on 18 / Feb / 2025 with JetBlue (price found 5 hours ago)

Subject to availability, prices correct of the last 24 hours

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Cheap return flights from San Francisco to London Heathrow

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The San Francisco / London Heathrow route

All 8622 km of it

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London Heathrow flight facts

What you need to know

What are the cheapest airlines?

Air Canada
JetBlue
British Airways
Delta Air Lines
KLM

These airlines usually offer the cheapest flights from San Francisco to London Heathrow.

Can I fly direct to London Heathrow?

Delta Air Lines
KLM
Virgin Atlantic
Finnair
British Airways

You can fly non-stop from San Francisco to London Heathrow with these airlines.

What airlines fly indirectly?

Air Canada
Lufthansa
JetBlue

These airlines fly from San Francisco to London Heathrow, but you’ll have at least one layover.

How long is the flight?

10 hrs 15 mins

This is the shortest flight time from San Francisco to London Heathrow.

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18 / Feb / 2025 is currently the lowest priced day of the year to fly the San Francisco/London Heathrow route. There are around 43 flights on any given week from the UK to London Heathrow and the cheapest month to fly right now is February.

Not suitable? Try running another search or viewing all cheap flight deals.

Min / Max Temperature (°C)

LOWEST

2 °C

AVG

11 °C

HIGHEST

24 °C

Rainfall (mm)

LOWEST

38.1 mm

AVG

52.5 mm

HIGHEST

66 mm

Key facts about London Heathrow

Currency

British pound

Language

English

Timezone

0 hrs behind GMT

How to get cheap flights from San Francisco to London Heathrow

Tips and advice from our flight experts

There are 11 airlines offering flights to London. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly. The cheapest date is currently 18 / Feb / 2025.

Make sure you use the search options above to search for flights to other airports in London, not just London Heathrow. The more options you look at, the better your chance of finding a cheap deal. Just so you know, the flight typically takes 11 hrs 30 mins.

You'll find that the cheapest flights There are 43 direct and indirect flights a week to London, so you should be able to find one that works for you. The most popular airlines are Air Canada, Delta Air Lines & KLM.

If you're planning on going to London during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.