Originally Posted by IAH-OIL-TRASH

Lot of oil trash traffic between IAH and Denver (large % of which are OnePassers, plus summer/winter vacation activities outside of Denver. A population to population size comparison isn't appropriate. Note also LAS service - smaller population than MSP or DEN, but more service than either, all on mainline a/c. MSP just doesn't support the larger aircraft. It might, albeit w/ less frequency, but it looks like CO's opted to offer more flights on smaller aircraft than fewer on larger ones.