I have no insight into the schedule, but if you need/want to travel JQ to DPS, transiting DRW is an option. JQ81 becomes JQ83 with a short layover in DRW. On the return, JQ82 DPS-DRW becomes JQ84 DRW-ADL.Seems like ADL-DPS flights stop dead on March 31 next year.
Using MEL-DPS as an example I can see flights for sale through July 2018 and scheduled through August 2018.
Likely to be a scheduling issue or bad news for ADL?
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Considering VA gave up on this route, and TT barely flew the route for a few weeks, JQ would no doubt be enjoying some strong loads on the route.