Cheap flights London to Helsinki

November is the cheapest month on this route, and fares usually stay low through the darker weeks of late autumn and early winter. Summer is the opposite: June and July bring the heaviest demand, so book well ahead if you want to travel then. Weekday departures, especially Tuesday and Wednesday, tend to cost less than Friday and Sunday, when business travellers fill the cabins. Watch the school holidays and the run-up to Christmas, when prices climb at both ends of the route.

Airlines flying between London and Helsinki include Finnair, Scandinavian Airlines, Norwegian, Norwegian International, Ryanair, Air Baltic, KLM Cityhopper, German Airways, Malta Airlines and Mokulele Flight Service. The mix matters: low-cost carriers such as Ryanair and Norwegian sell the seat on its own, while full-service names like Finnair and Scandinavian Airlines tend to include more in the fare. Some of these flights are direct and others route through a hub, so check the total journey time before you compare prices.

Helsinki is served by Vantaa, the city's main airport, which sits outside the centre rather than on its edge. The airport train and the bus routes both run into town, and the ride is short enough that you can land and be in the centre the same morning. Taxis and rideshares wait outside the terminal if you arrive late. Check which terminal your flight uses and allow time at the baggage belt, since arrivals from the UK often land in a busy wave.

Currency

EUR (€)

Power sockets

Type C, F · 230 V

Language

Swedish, Finnish

Emergency number

112

Driving side

right

Calling code

+358

Internet domain

.fi

EU / Schengen

EU member, Schengen area

Population of Helsinki

694 k (2025)

Time zone

UTC+02 (Europe/Helsinki)

Country facts: Wikidata

• London has several airports, so confirm whether you leave from Heathrow, Gatwick, Stansted, Luton or London City before you book.
• Check what the low-cost fare includes, because a cabin bag only ticket changes the real cost of the trip.
• If your connection is on separate tickets, leave a generous gap in case the first flight is delayed.
• Carry a valid passport and check the entry rules for Finland well before departure.
• Book early for summer travel and look at November if you want the lowest fares.
• Compare the total journey time, not just the price, when a routing goes through a hub.