Wow, glad to see SNA made the cut. I’m surprised PHX is on the list.
Remember that Allegiant to Bellingham from IWA is a very popular route. I have a lot of friends who hate making the drive out to Mesa for this flight however it is so cheap they consider it to be the best way to get to Seattle (them, not me). Allegiant has been rumored to be wanting to add IWA-PAE for a while.
Though I am Platinum on DL, I LOVE PAE and would be very tempted to take this route. Fly up, stay at the Hilton Garden Inn, tour the factory for the 8th time, enjoy Mukilteo for the afternoon and fly home depending on frequency. The perfect long weekend.