How do most travelers feel about Finnair?

When planning your LHR-WAS trip, keep in mind that Finnair is typically rated 7.6/10. This rating comes from 1,333 reviews by Cheapflights users who have traveled with Finnair.

Can I get a flight from London Heathrow Airport to Washington, D.C. on Finnair for under £601?

Finnair offers 23 flights from London Heathrow Airport to Washington, D.C. for under £601. Prices vary by date and time. To see all prices and select your dates, click here.

£417+ Finnair Flights from Heathrow to Washington, D.C.

Cheapflights users flying from London to Washington, D.C. on Finnair typically fly into Washington, D.C. Dulles Intl and depart from London Heathrow. Select your dates above for pricing.

Finnair flights from Heathrow to Washington, D.C. in 2025

One-way from	£417
Return from	£514
Popular in	July
Cheapest in	September
Average price (all airlines)	£575

Finnair
19/1
Nonstop
8h 30m total
London to Washington, D.C.

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Finnair
10/12-14/12
1 total stop
19h 25m total
London to Washington, D.C.

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Highest demand for flights from London Heathrow to Washington, D.C.; 10% potential price increase.

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Best time to find cheap flights from London Heathrow to Washington, D.C.; 2% potential price drop.

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Average price for all London Heathrow to Washington, D.C. flights (one-way and round-trip).

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Can I get a flight from London Heathrow Airport to Washington, D.C. on Finnair for under £601?
Finnair offers 23 flights from London Heathrow Airport to Washington, D.C. for under £601. Prices vary by date and time. To see all prices and select your dates, click here.
How do most travelers feel about Finnair?
When planning your LHR-WAS trip, keep in mind that Finnair is typically rated 7.6/10. This rating comes from 1,333 reviews by Cheapflights users who have traveled with Finnair.

Find Finnair flight deals from Heathrow to Washington, D.C.

Enter your travel dates to find the best prices.

Cheapest Finnair flights from Heathrow to Washington, D.C.
Explore the most affordable Finnair flight options available from Heathrow to Washington, D.C.. Find the lowest fares with prices last updated on 27 October 2025.

Sun 2/1114:45LHR - IAD

1 stop14h 14mFinnair

Sat 8/1120:09IAD - LHR

1 stop30h 11mFinnair

Deal found 25/10£516

Wed 29/1011:45LHR - DCA

1 stop12h 13mFinnair

Wed 12/1113:44DCA - LHR

1 stop12h 36mFinnair

Deal found 25/10£516

Fri 7/1111:45LHR - IAD

1 stop16h 22mFinnair

Thu 4/1218:20IAD - LHR

Nonstop7h 10mFinnair

Deal found 27/10£519

Best Finnair flights from Heathrow to Washington, D.C.
Discover carefully curated Finnair flight deals from Heathrow to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 October 2025.

Wed 10/1216:25LHR - IAD

Nonstop8h 30mFinnair

Sun 14/1220:05IAD - LHR

1 stop10h 55mFinnair

Deal found 27/10£514

Tue 16/1216:25LHR - IAD

Nonstop8h 30mFinnair

Tue 23/1216:29IAD - LHR

1 stop14h 31mFinnair

Deal found 27/10£517

Tue 25/1111:45LHR - IAD

1 stop12h 35mFinnair

Mon 1/1221:45IAD - LHR

Nonstop7h 15mFinnair

Deal found 25/10£519

Direct Finnair flights from Heathrow to Washington, D.C.
Explore direct Finnair flight options from Heathrow to Washington, D.C. based on user searches, and compare prices and availability for your desired travel dates. Data last updated 27 October 2025.

Tue 16/1216:25LHR - IAD

Nonstop8h 30mFinnair

Tue 23/1221:45IAD - LHR

Nonstop7h 15mFinnair

Deal found 26/10£517

Fri 13/216:25LHR - IAD

Nonstop8h 30mFinnair

Sat 21/218:20IAD - LHR

Nonstop7h 10mFinnair

Deal found 27/10£520

Thu 18/1216:25LHR - IAD

Nonstop8h 30mFinnair

Wed 14/118:20IAD - LHR

Nonstop7h 10mFinnair

Deal found 26/10£609

Last-minute Finnair flights from Heathrow to Washington, D.C.
Discover last-minute Finnair flight deals from Heathrow to Washington, D.C.. Data last updated 27 October 2025 and is based on user searches.

Sun 2/1114:45LHR - IAD

1 stop14h 14mFinnair

Sat 8/1120:09IAD - LHR

1 stop30h 11mFinnair

Deal found 25/10£516

Wed 29/1011:45LHR - DCA

1 stop12h 13mFinnair

Wed 12/1113:44DCA - LHR

1 stop12h 36mFinnair

Deal found 25/10£516

Fri 7/1111:45LHR - IAD

1 stop16h 22mFinnair

Thu 4/1218:20IAD - LHR

Nonstop7h 10mFinnair

Deal found 27/10£519

One-way Finnair flights to Washington, D.C.
Search for one-way Finnair flight options to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 27 October 2025.

Mon 19/116:25LHR - IAD

Nonstop8h 30mFinnair

Deal found 27/10£417

Tue 20/115:25LHR - BWI

Nonstop8h 20mFinnair

Deal found 27/10£423

Sat 24/112:10LHR - IAD

Nonstop8h 25mFinnair

Deal found 26/10£455

Travel insights for Finnair flights from Heathrow to Washington, D.C.

Get recent, data-driven insights about Finnair flights from Heathrow to Washington, D.C. including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. with Finnair?

Currently, the most affordable month to book a Finnair flight from London Heathrow Airport to Washington, D.C. in April, with an average price of £409. Conversely, traveling with Finnair from London Heathrow Airport to Washington, D.C. in October will be the most expensive, with an average cost of £562. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

Weekly Finnair flight availability from London Heathrow Airport to Washington, D.C.

The most Finnair flights from LHR to WAS are scheduled on a Monday (2 on average). You will have fewer Finnair flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in Washington, D.C. by month

In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

Temperature in Washington, D.C. by month

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Best time to book a flight from Heathrow to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Heathrow with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Browse thousands of different options on Cheapflights for your next trip

See what others are saying about Finnair

Finnair

7.6

Good

1,333 reviews

Check prices

Overview

Recent reviews

4.0

Mediocre|Sept 2025

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

8.0

Very Good|Jul 2025

It was okay

2.0

Poor|Jun 2025

They stranded us in the airport

10.0

Wonderful|May 2025

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

10.0

Wonderful|May 2025

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.

1 out of 445

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Finnair flights from London Heathrow Airport to Washington, D.C. (LHR - WAS)

Cheapflights users flying from London to Washington, D.C. on Finnair typically fly into Washington, D.C. Dulles Intl and depart from London Heathrow. Select your dates above for pricing.

Finnair flights from Heathrow to Washington, D.C. in 2025

Find detailed information about Finnair flights from Heathrow to Washington, D.C.. Explore the options provided by Finnair to plan your journey from Heathrow to Washington, D.C.. Data last updated 27 October 2025.

One-way from

Return from

Popular in

Cheapest in

Average price (all airlines)

Can I get a flight from London Heathrow Airport to Washington, D.C. on Finnair for under £601?

How do most travelers feel about Finnair?

Find Finnair flight deals from Heathrow to Washington, D.C.

Cheapest Finnair flights from Heathrow to Washington, D.C.Explore the most affordable Finnair flight options available from Heathrow to Washington, D.C.. Find the lowest fares with prices last updated on 27 October 2025.

Explore the most affordable Finnair flight options available from Heathrow to Washington, D.C.. Find the lowest fares with prices last updated on 27 October 2025.

Travel insights for Finnair flights from Heathrow to Washington, D.C.

Get recent, data-driven insights about Finnair flights from Heathrow to Washington, D.C. including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C. with Finnair?

Weekly Finnair flight availability from London Heathrow Airport to Washington, D.C.

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

Best time to book a flight from Heathrow to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Heathrow with our price prediction graph.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly from Heathrow to Washington, D.C. on another airline

Consider alternative airlines that service the Washington, D.C. area. Flight routes are based on user searches made on Cheapflights and were last updated on 27 October 2025.

See what others are saying about Finnair

Overview

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Travel Smart

Cheapest Finnair flights from Heathrow to Washington, D.C.
Explore the most affordable Finnair flight options available from Heathrow to Washington, D.C.. Find the lowest fares with prices last updated on 27 October 2025.