Booking with Norwegian 23 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Helsinki. 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 Norwegian flight from London to Helsinki in March, with an average price of £50. Conversely, traveling with Norwegian from London to Helsinki in July will be the most expensive, with an average cost of £167. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
In terms of precipitation, rainfall in Helsinki ranges from 30.0 - 70.0 inches per month. August is typically the wettest month, when rainfall can reach 70.0 mm. February is typically the driest time to visit Helsinki when rainfall is around 30.0 mm.
If weather is an important factor for your trip to Helsinki, 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 16.0 C. Travellers hoping to avoid the cold should look outside of February, when temperatures are typically at their lowest (around -6.0 C).
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