Yes, it is. There are direct train services between O Hare airport and other important places in the Chicago City. There is a blue-line train facility between the O Hare international airport and the downtown area of Chicago, IL. During day time, this service is available every 10 minutes. This service is available during twenty four hours and is a best option to travel between downtown Chicago and the airport.

This train service is operated by 'Chicago Transit Authority', known popularly as CTA. The other train services available include the 'Metra North Center Trains' that connect the cook and lake counties and the O'Hare international airport.

http://www.ohare.com/

http://www.virtualtourist.com/travel/North_America/United_States_of_America/Illinois/Chicago-777256/Transportation-Chicago-OHare_International_Airport-BR-2.html

http://www.chicagotraveler.com/attractions/ohare-international-airport.html

When flying from British Columbia you will find that Vancouver has the most number of flights that fly direct to Chicago from British Columbia. Moreover, Vancouver is the most famous and most connected city in British Columbia. The total number of carriers from British Columbia to Chicago is around 50. You can also check the details at the following link.

http://www.farecompare.com/flights/Chicago-CHI/British_Columbia-BC/citystate.html