Frontier is likely going to fold entirely before too long. But Southwest is now flying from both OKC and Tulsa to Denver.
American has had a daily 757 to Tulsa from Dallas for years, but it's there to a large extent to move planes to and from the airbase. They unveiled a 757 with the Race for the Cure ribbon painted down the side here yesterday as a matter of fact.
Tulsa World: Jets go pink to aid Komen