CS100? It is large and, with no scope restrictions, permissible. Horizon could fly the CS100s across the country or even from smaller West Coast airports to Hawaii. Bombardier needs orders:

https://m.youtube.com/watch?v=X9yWF9cCVJY

The tree-huggers in the Pacific Northwest would love the lower environmental impact from the C-Series. Plus, I believe the C-Series was introduced to the Alaska/Horizon management on a recent aircraft tour that included a stop in Seattle.

Question - With Bombardier's willingness to cut deals on a proven airplane, and Horizon's deep familiarity with the manufacturer, why wouldn't Alaska's management seriously consider the C-Series while they still can (take advantage of no scope restrictions for now)? Perhaps Bombardier could swap used Q400s for a few newer CS100s as part of a bigger deal? Horizon has always been a solid Bombardier customer and now they have no scope restrictions.

If you are an Alaska/Horizon manager, this is a golden opportunity to take advantage of a no-scope opportunity (potentially gone in the next contract) with a very familiar partner. Just sayin...........