Originally Posted by sweetkiddddo

CO will only rebook you on CO/UA. They are not willing to rebook you on any other star alliance. I have had a few times in the last two years where CO cancelled all their flights from EWR-YYZ. The gate agents claimed "the airport was shutdown", but AC flights were still flying in and out. When I politely asked to be rebooked on AC, the agent claimed it is against their policy to rebook you on a partner flight if it is due to weather, top tier or kettle.