Nov 28 (Reuters) - American Airlines:
* PRESS RELEASE - AMERICAN AIRLINES STRENGTHENS SERVICE TO CANADA IN 2018
* SAYS ADDING SERVICE FROM CHICAGO O'HARE INTERNATIONAL AIRPORT TO CALGARY INTERNATIONAL AIRPORT & VANCOUVER INTERNATIONAL AIRPORT
* SAYS DAILY SERVICE TO VANCOUVER BEGINS MAY 4, 2018, & SEASONAL SERVICE TO CALGARY BEGINS JUNE 7, 2018