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Find cheap KLM flights to Washington

CMH — SEA
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags

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Cheapest KLM flights from United Kingdom to Washington
Explore the most affordable KLM flight options available from United Kingdom to Washington. Find the lowest fares with prices last updated on 27 July 2026.

Wed 26/811:45
LHR
-
SEA
1 stop12h 42m
KLM
Mon 7/917:30
SEA
-
LHR
Nonstop9h 50m
KLM
Deal found 25/7£547
Thu 27/806:30
LHR
-
SEA
1 stop13h 07m
KLM
Tue 8/917:30
SEA
-
LHR
Nonstop9h 50m
KLM
Deal found 25/7£549
Fri 28/817:45
LHR
-
SEA
Nonstop10h 18m
KLM
Mon 14/921:50
SEA
-
LHR
Nonstop9h 45m
KLM
Deal found 26/7£560

Flights to Washington with KLM at a glance

Find detailed information about KLM flights from United Kingdom to Washington. Explore the options provided by KLM to plan your journey from United Kingdom to Washington. Data last updated 27 July 2026.

Popular in

July

Cheapest in

January

Average price

£590

Return from

£518

One-way from

£701
Highest demand for flights to Washington with KLM; 9% potential price increase.
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Best time to find cheap flights to Washington with KLM; 1% potential price drop.
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Average price for flights to Washington with KLM (return).
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KLM
  • KLM
  • 4/9-19/9
  • 1 total stop
  • 23h 02m total
  • United Kingdom to Washington
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KLM
  • KLM
  • 4/8
  • Nonstop
  • 10h 20m total
  • United Kingdom to Washington
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Cheapflights Insights

Find cheap KLM flights to Washington

How long is the flight to Washington with KLM?

On average, KLM flights from the United Kingdom to Washington take 12 hours 7 minutes. Flights to Washington from other popular cities in the United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

KLM weekly flight availability to Washington

The most flights to Washington operated by KLM are scheduled on a Friday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

When is the best time to book a flight to Washington with KLM?

The best time to book a flight to Washington with KLM is 52 days before departure. On average, fares are higher if you book 39 days before departure.

FAQs for KLM flights to Washington

  • Is KLM the cheapest airline for a flight to Washington?

    According to our data Air Canada offers the lowest average return price for flights to Washington, although the fare you pay will vary depending on your time and date of travel. Use Cheapflights to compare your options before booking your flight.

  • Do other airlines fly to Washington?

    Airlines such as Virgin Atlantic, British Airways and Icelandair also operate flights to Washington. Check Cheapflights to compare fares from KLM and these other carriers.

  • What is the average cost of a flight to Washington with KLM?

    A typical KLM flight to Washington averages around £928 for a return and £694 for a one-way ticket.

Reviews from KLM flights to Washington

See what other users thought of their KLM experience.
KLM
7.8
Good
1,550 reviews
Check prices
Overview

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Food

7.3

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