Frontier Airlines is proactively cancelling flights this evening and tomorrow morning due to visibility issues around the Milwaukee and Madison areas.

A statement reads,These conditions do not allow our Republic- and Chautauqua-operated E135, E145, E170 and E190 flights to operate. As of now, our Frontier-operated Airbus flights will be able to operate, but we’re monitoring those as well.They expect to resume regular service mid-morning on Thursday.You are urged to double check your flight schedule before leaving the house.