big sky quit those cities because they didn't make $$, not because they were replaced. i don't call the airline unstable but revenue challenged. the ctities we used to serve guaranteed pax loads and revenue but didn't deliver. chalks was a good opportunity but THEY didn't deliver. btw, quit spewing your non-educated bs around. get the facts. delta is very happy these days from what i have heard. completion and on-time in bos is very good.