Cheap flights from Washington DC to London Heathrow

Q: What are the cheapest airlines?

Air Canada, Delta Air Lines, Icelandair, KLM, Virgin Atlantic. These airlines usually offer the cheapest flights from Washington DC to London Heathrow.

Q: Can I fly direct to London Heathrow?

Delta Air Lines, KLM, Virgin Atlantic, Iberia Airlines, British Airways. You can fly non-stop from Washington DC to London Heathrow with these airlines.

Q: What airlines fly indirectly?

Air Canada, Lufthansa, Icelandair. These airlines fly from Washington DC to London Heathrow, but you’ll have at least one layover.

Q: How long is the flight?

7 hrs 10 mins. This is the shortest flight time from Washington DC to London Heathrow.

from as little as £452

20 nights in London, departing Washington DC Washington Dulles International Airport on 31 / Jan / 2025 with Icelandair (price found 37 hours ago)

Subject to availability, prices correct of the last 24 hours

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Cheap return flights from Washington DC to London Heathrow

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The Washington DC / London Heathrow route

All 5906 km of it

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London Heathrow flight facts

What you need to know

What are the cheapest airlines?

Air Canada
Delta Air Lines
Icelandair
KLM
Virgin Atlantic

These airlines usually offer the cheapest flights from Washington DC to London Heathrow.

Can I fly direct to London Heathrow?

Delta Air Lines
KLM
Virgin Atlantic
Iberia Airlines
British Airways

You can fly non-stop from Washington DC to London Heathrow with these airlines.

What airlines fly indirectly?

Air Canada
Lufthansa
Icelandair

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

How long is the flight?

7 hrs 10 mins

This is the shortest flight time from Washington DC to London Heathrow.

Alternative flights from the UK to London Heathrow

Check out prices for other routes

Washington DC to London City Airport

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Washington DC to London Gatwick

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Alternative flights from Washington DC

You might find cheaper flights nearby

London from Washington DC Washington Dulles International Airport

from £452 pp

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31 / Jan / 2025 is currently the lowest priced day of the year to fly the Washington DC/London Heathrow route. There are around 132 flights on any given week from the UK to London Heathrow and the cheapest month to fly right now is January.

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 Washington DC to London Heathrow

Tips and advice from our flight experts

To help you find the best deal, we've gathered all the flight options from Washington DC to London Heathrow. Look out for Icelandair flights – they usually have the lowest prices. If you can’t find what you're looking for, try widening your search to include the other airports in London.

We compare every airline that flies from Washington DC to London, so that you can find the best value flights. The most popular airlines are Air Canada, Delta Air Lines & KLM. Between them, they cover 132 flights every week from Washington DC to or via London. The 5906 km journey usually takes around 8 hrs 15 mins.

At the moment, the cheapest date to travel on is 31 / Jan / 2025. You could also try searching by month, if you're flexible on dates. This will show you when prices are at their cheapest and their most expensive. Generally speaking, the earlier you book, the better deal you'll get.

Found your flights? Select the ones you want, then go through to the next stage to complete your booking. If you'd like to add car hire or a hotel for your trip to United Kingdom, you can do that too – simply use the tabs at the top of the page.