Finnair, based in Helsinki, is a member of the oneworld alliance. It is even part of the transatlantic joint venture between American Airlines and British Airways, Iberia, and Aer Lingus. But until recently its frequent flyer program wasn’t very useful.
The airline has linked up with British Airways and other partners to use Avios as its currency, now guarantees award availability for at least two business class seats on its own flights when schedules are first released if you’re redeeming Avios, and has revised its award chart to offer some fantastic values.