CHICAGO -- United Airlines says it is cutting 240 jobs in Toronto, Vancouver and Calgary.

The U.S.-based airlines says the jobs, which are related to "above and below-the-wing" duties, will now be outsourced.

The cuts will become effective in three months.

United says the announcement does not have any effect on the number of flights the airline operates in Canada.

United Airlines spokesman Christen David said in an email that the cuts were difficult but necessary decisions in order to run a "more efficient and financially sustainable business."