Booking with Finnair 64 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.
Currently, the most affordable month to book a Finnair flight from London to Boston in February, with an average price of £294. Conversely, traveling with Finnair from London to Boston in October will be the most expensive, with an average cost of £403. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
The most Finnair flights from LON to BOS are scheduled on a Monday (4 on average). You will have fewer Finnair flight options on Thursday, 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).
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