Cheap flights from Cardiff to Washington DC

Q: What are the cheapest airlines?

KLM, Virgin Atlantic. These airlines usually offer the cheapest flights from Cardiff to Washington DC.

Q: What airlines fly indirectly?

Virgin Atlantic, KLM, Air France, Aer Lingus. These airlines fly from Cardiff to Washington DC, but you’ll have at least one layover.

Q: How long is the flight?

10 hrs 45 mins. This is the shortest flight time from Cardiff to Washington DC.

from as little as £1,723

5 nights in Washington DC, departing Cardiff on 14 / Sep / 2025 with KLM (price found 17 hours ago)

Subject to availability, prices correct of the last 24 hours

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Cheap return flights from Cardiff to Washington DC

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The Cardiff / Washington DC route

All 5718 km of it

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Washington DC flight facts

What you need to know

What are the cheapest airlines?

KLM
Virgin Atlantic

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

What airlines fly indirectly?

Virgin Atlantic
KLM
Air France
Aer Lingus

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

How long is the flight?

10 hrs 45 mins

This is the shortest flight time from Cardiff to Washington DC.

Alternative flights from the UK to Washington DC

Check out prices for other routes

London to Washington DC

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Manchester to Washington DC

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Edinburgh to Washington DC

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Birmingham to Washington DC

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Cardiff to Washington DC Ronald Reagan Washington National Airport

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Cardiff to Washington DC Washington Dulles International Airport

from £1,723 pp

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Alternative flights from Cardiff to Washington DC

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14 / Sep / 2025 is currently the lowest priced day of the year to fly the Cardiff/Washington DC route. There are around 89 flights on any given week from the UK to Washington DC and the cheapest month to fly right now is September.

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

Min / Max Temperature (°C)

LOWEST

-3 °C

AVG

13 °C

HIGHEST

31 °C

Rainfall (mm)

LOWEST

73 mm

AVG

91.9 mm

HIGHEST

126 mm

Key facts about Washington DC

Currency

United States dollar

Language

English

Timezone

5 hrs behind GMT

How to get cheap flights from Cardiff to Washington DC

Tips and advice from our flight experts

Your flight from Cardiff to Washington DC should take about 12 hrs. We've gone through all 89 of the weekly flights to or via Washington DC, operated by four airlines, to help you compare flight prices and times. At the moment, the cheapest flight is £1,723.

Virgin Atlantic, KLM & KLM are the most popular airlines for flying from Cardiff to Washington DC. Adjust your search options to look by month, and see how much you could save if you fly during low season.

Washington DC actually has two airports to choose from – but Washington DC Ronald Reagan Washington National Airport (DCA) 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 Virgin Atlantic, KLM & KLM.

But if you can't find one which is right for you, try looking at flights to other cities in the USA to check out some other options.