Can I get a flight from London Heathrow Airport to Boston on Finnair for under £592?

Finnair offers 8 flights from London Heathrow Airport to Boston for under £592. Prices vary by date and time. To see all prices and select your dates, click here.

What is the cheapest month to book a flight from London Heathrow Airport to Boston with Finnair?

Currently, the most affordable month to book a Finnair flight from London Heathrow Airport to Boston in March, with an average price of £416. Conversely, traveling with Finnair from London Heathrow Airport to Boston in June will be the most expensive, with an average cost of £634. 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 Boston

The most Finnair flights from LHR to BOS are scheduled on a Monday (4 on average). You will have fewer Finnair flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

In terms of precipitation, rainfall in Boston ranges from 78.0 - 101.0 inches per month. March is typically the wettest month, when rainfall can reach 101.0 mm. July is typically the driest time to visit Boston when rainfall is around 78.0 mm.

If weather is an important factor for your trip to Boston, 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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

£341+ Finnair Flights from Heathrow to Boston

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Cheapest Finnair flights from Heathrow to Boston
Explore the most affordable Finnair flight options available from Heathrow to Boston. Find the lowest fares with prices last updated on 13 August 2026.

Wed 23/920:10 -

Nonstop7h 25m

Wed 7/1020:05 -

Nonstop6h 55m

Deal found 11/8£521

Sun 6/910:05 -

Nonstop7h 35m

Sat 12/911:36 -

1 stop29h 04m

Deal found 9/8£525

Thu 10/914:10 -

1 stop14h 18m

Thu 17/920:05 -

Nonstop6h 55m

Deal found 10/8£526

Can I get a flight from London Heathrow Airport to Boston on Finnair for under £592?
Finnair offers 8 flights from London Heathrow Airport to Boston for under £592. Prices vary by date and time. To see all prices and select your dates, click here.

Finnair flights from Heathrow to Boston in 2026

One-way from	£341
Return from	£508
Popular in	June
Cheapest in	February
Average price (all airlines)	£529

Finnair
5/10
Nonstop
7h 35m total
London to Boston

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Finnair
28/9-4/10
Nonstop
14h 20m total
London to Boston

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Highest demand for flights from London Heathrow to Boston Logan Intl; 8% potential price increase.

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Best time to find cheap flights from London Heathrow to Boston Logan Intl; 2% potential price drop.

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Average price for all London Heathrow to Boston Logan Intl flights (one-way and round-trip).

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For Economy class flights, the cheapest month to fly this route is March. The most expensive months are June and August.

Best time to book a flight from Heathrow to Boston

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

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Finnair flights from London Heathrow Airport to Boston (LHR - BOS)

Find Finnair flight deals from Heathrow to Boston

Cheapest Finnair flights from Heathrow to BostonExplore the most affordable Finnair flight options available from Heathrow to Boston. Find the lowest fares with prices last updated on 13 August 2026.

Explore the most affordable Finnair flight options available from Heathrow to Boston. Find the lowest fares with prices last updated on 13 August 2026.

Best Finnair flights from Heathrow to BostonDiscover carefully curated Finnair flight deals from Heathrow to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 August 2026.

Discover carefully curated Finnair flight deals from Heathrow to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 August 2026.

Direct Finnair flights from Heathrow to BostonExplore direct Finnair flight options from Heathrow to Boston based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 August 2026.

Explore direct Finnair flight options from Heathrow to Boston based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 August 2026.

Last-minute Finnair flights from Heathrow to BostonDiscover last-minute Finnair flight deals from Heathrow to Boston. Data last updated 13 August 2026 and is based on user searches.

Discover last-minute Finnair flight deals from Heathrow to Boston. Data last updated 13 August 2026 and is based on user searches.

One-way Finnair flights to BostonSearch for one-way Finnair flight options to Boston. Find affordable one-way fares based on user searches. Data last updated 13 August 2026.

Search for one-way Finnair flight options to Boston. Find affordable one-way fares based on user searches. Data last updated 13 August 2026.

Can I get a flight from London Heathrow Airport to Boston on Finnair for under £592?

Finnair flights from Heathrow to Boston in 2026

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Average price (all airlines)

Which month is the cheapest to fly Economy class from London Heathrow Airport to Boston?

For Economy class flights, the cheapest month to fly this route is March. The most expensive months are June and August.

Weekly Finnair flight availability from London Heathrow Airport to Boston

The most Finnair flights from LHR to BOS are scheduled on a Monday (4 on average). You will have fewer Finnair flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Boston by month

In terms of precipitation, rainfall in Boston ranges from 78.0 - 101.0 inches per month. March is typically the wettest month, when rainfall can reach 101.0 mm. July is typically the driest time to visit Boston when rainfall is around 78.0 mm.

Temperature in Boston by month

Best time to book a flight from Heathrow to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston 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 Boston on another airline

Consider alternative airlines that service the Boston area. Flight routes are based on user searches made on Cheapflights and were last updated on 13 August 2026.

Other Finnair flights from Heathrow

Browse through other Finnair flights departing from Heathrow. Flight routes are based on user searches made on Cheapflights and were last updated on 13 August 2026.

Complete your trip

Complete your trip to Boston by adding a car hire and/or hotel booking to your travel itinerary.

Other airlines servicing Heathrow and Boston

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Other popular destinations in North America

If Boston is not for you, choose from these other destinations located in North America. Flight routes are based on user searches made on Cheapflights and were last updated on 13 August 2026.

Popular flights with Finnair

Browse through some of the most popular routes that Finnair offers at this time. Flights are based on user searches made on Cheapflights and were last updated on 13 August 2026.

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Cheapest Finnair flights from Heathrow to Boston
Explore the most affordable Finnair flight options available from Heathrow to Boston. Find the lowest fares with prices last updated on 13 August 2026.

Best Finnair flights from Heathrow to Boston
Discover carefully curated Finnair flight deals from Heathrow to Boston that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 August 2026.

Direct Finnair flights from Heathrow to Boston
Explore direct Finnair flight options from Heathrow to Boston based on user searches, and compare prices and availability for your desired travel dates. Data last updated 13 August 2026.

Last-minute Finnair flights from Heathrow to Boston
Discover last-minute Finnair flight deals from Heathrow to Boston. Data last updated 13 August 2026 and is based on user searches.

One-way Finnair flights to Boston
Search for one-way Finnair flight options to Boston. Find affordable one-way fares based on user searches. Data last updated 13 August 2026.