Helsinki (HEL) to London (LON): 1,148 miles (1,848 km) great-circle, about 2h 50m nonstop by our estimate. Cheapest fare observed: $370 round-trip on airline TF, with 1 stop, departing April 30, 2026.
$370 round-trip, airline TF TF711, departing 2026-04-30 at 16:30, returning 2026-05-03. The recorded itinerary left on a Thursday, returning on a Sunday 3 nights later; the fare was observed 5 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $370, it ranked 20th of the 30 round-trip fares we recorded from HEL (median $288). That is 32.2 cents per great-circle mile (round-trip price over one-way distance), above the HEL median of 28.7 cents across 30 round-trip routes.
Routes from HEL of similar length: Paris (1,178 mi) at $224 and Zurich (1,105 mi) at $443.
airline TF had the cheapest fare on 2 of 30 HEL routes. It is the 17th longest of the 30 routes we track from HEL.
Of 49 departure airports with a fare to London, Helsinki (HEL) ranked 17th at $370. Lowest: $46 from Dublin (DUB); highest: $1356 from Sydney (SYD); 14 nonstop. Cheapest-fare airlines (routes): Ryanair (7), easyJet (4), Etihad (4), Frontier (4), Air Canada (3) and WestJet (3), plus 19 more.
That depends on your passport and trip, so check the official source for United Kingdom: GOV.UK: check if you need a UK visa. Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Europe/Helsinki, Europe/London; flight time is our estimate.