Originally Posted by
rob_flies_ua
CO's website has some nice features, but so does UA's (the ability to view inventory buckets is a great feature). This is more about the backend systems.
UA wins on the ability to view inventory buckets with details.
CO wins on the ability to change and reissue a ticket online (yes, UA can sort-of do that, but only if you're not changing the origin and/or destination), award searches, level of detail provided on flight status (upgrade and flight standby lists available online, where is this plane coming from on flight status, details of in-flight amenities), and ability to mix up classes of service by flight segment as opposed to assigning a single class of service for the entire itinerary.