Less than a year after it started service between Chicago and Thunder Bay, United Airlines has decided to drop the route.

The announcement was made Friday morning by Thunder Bay airport officials.

United started its service to "the windy city" last February, using Bombardier CRJ regional jets. Its last flight will be April 24.

A news release from the airport gave no reason for United's decision. But in an e-mail to CBC News, United spokesperson Mary Clark said "We are ending our service...due to the financial performance of the flights."

Clark said the airline will be contacting customers currently booked on flights and will accommodate them on other flights or provide a refund.

In the airport news release, manager of business development Ed Schmidtke said "although we regret the cessation of any service, Thunder Bay's connectivity to the United States continues to be well-served via either Winnipeg or Toronto by Air Canada, WestJet and Porter Airlines."

In June, WestJet's new Encore service will double the number of WestJet flights between Thunder Bay and the two cities, using turboprop aircraft instead of the existing jet service.

Thunder Bay airport last year broke its all-time record for passenger traffic.

The airport handles 60 daily flights to various destinations.