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Finnair flights from London to Boston (LON - BOS)

LON — BOS
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights users flying from London to Boston on Finnair typically fly into Boston Logan Intl and depart from London Heathrow. Select your dates above for pricing.

Finnair flights from London to Boston in 2025

Find detailed information about Finnair flights from London to Boston. Explore the options provided by Finnair to plan your journey from London to Boston. Data last updated 30 October 2025.

One-way from

£304

Return from

£414

Popular in

December

Cheapest in

September

Average price (all airlines)

£446
Finnair
  • Finnair
  • 28/1
  • Nonstop
  • 7h 45m total
  • London to Boston
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Finnair
  • Finnair
  • 9/3-16/3
  • 1 total stop
  • 20h 00m total
  • London to Boston
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Highest demand for flights from London to Boston Logan Intl; 4% potential price increase.
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Best time to find cheap flights from London to Boston Logan Intl; 2% potential price drop.
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Average price for all London to Boston Logan Intl flights (one-way and round-trip).
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  • Can I get a flight from London to Boston on Finnair for under £454?

    There are 11 flights available on Finnair from London to Boston for under £454. These prices can change based on many factors including date and time. To find LON-BOS flight prices for your dates, click here.

Find Finnair flight deals from London to Boston

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Cheapest Finnair flights from London to Boston
Explore the most affordable Finnair flight options available from London to Boston. Find the lowest fares with prices last updated on 30 October 2025.

Sat 8/1111:25LHR - BOS
1 stop13h 25mFinnair
Mon 24/1119:15BOS - LHR
Nonstop6h 45mFinnair
Deal found 30/10£419
Wed 5/1111:25LHR - BOS
1 stop13h 25mFinnair
Mon 10/1119:25BOS - LHR
Nonstop6h 35mFinnair
Deal found 29/10£421
Wed 26/1113:30LHR - BOS
Nonstop7h 40mFinnair
Wed 3/1213:25BOS - LHR
1 stop12h 55mFinnair
Deal found 29/10£433

Travel insights for Finnair flights from London to Boston

Get recent, data-driven insights about Finnair flights from London to Boston including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London to Boston with Finnair?

Use this chart to determine the optimal time to book a return flight from London to Boston. Price data was last updated on 24 October 2025.

Booking with Finnair 46 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, the most affordable month to book a Finnair flight from London to Boston in February, with an average price of £306. Conversely, traveling with Finnair from London to Boston in October will be the most expensive, with an average cost of £419. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

Rainfall in Boston by month

Plan your trip to Boston by taking into account the average rainfall totals 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

Plan your trip to Boston by taking into account the average temperature totals by month.

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).

Best time to book a flight from London to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from London 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.

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Fly from London 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 30 October 2025.
British Airways flights from London to Boston Logan Intl
Virgin Atlantic flights from London to Boston Logan Intl

See what others are saying about Finnair

Read reviews and see what other travellers are saying about their experiences with Finnair. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing Finnair for your next flight. Reviews last updated 30 October 2025.
Finnair
7.6
Good
1,333 reviews
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Overview

Entertainment

6.9

Comfort

7.4

Boarding

7.6

Crew

8.1

Food

6.7

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