Cheap flights from Seattle to London

Q: What are the cheapest airlines?

Air Canada, Delta Air Lines, Icelandair, KLM, Lufthansa. These airlines usually offer the cheapest flights from Seattle to London.

Q: Can I fly direct to London?

Delta Air Lines, Virgin Atlantic, KLM, Iberia Airlines. You can fly non-stop from Seattle to London with these airlines.

Q: What airlines fly indirectly?

British Airways, Lufthansa, Air Canada, Icelandair, KLM. These airlines fly from Seattle to London, but you’ll have at least one layover.

Q: How long is the flight?

9 hrs 25 mins. This is the shortest flight time from Seattle to London.

from as little as £511

7 nights in London, departing Seattle on 23 / Jan / 2025 with Icelandair (price found 47 hours ago)

Subject to availability, prices correct of the last 24 hours

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The Seattle / London route

All 7733 km of it

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London flight facts

What you need to know

What are the cheapest airlines?

Air Canada
Delta Air Lines
Icelandair
KLM
Lufthansa

These airlines usually offer the cheapest flights from Seattle to London.

Can I fly direct to London?

Delta Air Lines
Virgin Atlantic
KLM
Iberia Airlines

You can fly non-stop from Seattle to London with these airlines.

What airlines fly indirectly?

British Airways
Lufthansa
Air Canada
Icelandair
KLM

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

How long is the flight?

9 hrs 25 mins

This is the shortest flight time from Seattle to London.

Alternative flights from the UK to London

Check out prices for other routes

Seattle to London City Airport

from £2,031 pp

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Seattle to London Gatwick

from £5,122 pp

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Seattle to London Heathrow

from £511 pp

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23 / Jan / 2025 is currently the lowest priced day of the year to fly the Seattle/London route. There are around 50 flights on any given week from the UK to London and the cheapest month to fly right now is January.

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

Key facts about London

Currency

British pound

Language

English

Timezone

0 hrs behind GMT

How to get cheap flights from Seattle to London

Tips and advice from our flight experts

We've gone through all the flights from Seattle to London, to help you find the best option. There are about 50 flights to or via London from Seattle every week, and the best price is currently £511. Your journey from will last about 14 hrs 25 mins.

Being flexible with your dates could help you find a cheaper flight from Seattle to London.

London actually has three airports to choose from – but London Heathrow (LHR) is the usually the cheapest option. If you need to fly into a specific airport, adjust your search to focus on those flights. The most popular airlines include KLM, Lufthansa & Virgin Atlantic.

If you can’t quite find what you’re looking for, try checking flight prices to other cities in United Kingdom.