Which airports does Finnair fly between Chicago and London?
For flights between Chicago and London, Finnair operates from the following airport routes: O hare International Airport (ORD) to Heathrow (LHR)
What do Finnair flights from Chicago to London cost?
One of Finnair cheapest prices for a Chicago to London flight we have right now is $557.
On average though, flights with Finnair cost $564.72 for the route Chicago to London, but it mostly depends on the season and how far in advance you book your tickets.