Fly from Chicago to Helsinki for $510 round-trip on KLM.
Searching KLM.com, we found seats departing ORD on Wednesday, November 4, returning from HEL on the following Wednesday, November 11. Flights connect via Amsterdam AMS.
Other dates are also available for travel from November through March.
For booking info, see our Fare Details.
Need a room in Helsinki? Here's a look at what's available for the above dates on Hotelwatchdog.