Does anyone know what aircraft will be used for the LA flight?
Airbus A220-300
The A220 is a home run for airlines in that market. Since the regional jets are at the edge of range for a flight like that, most airlines have to run a plane that's about 150 seats, which makes the economics tough. The A220-100 (at least in Delta's config) seats 108, and can make the flight with ease.
Now, I hadn't heard the reason JetBlue dumped JAX-LAX - the pilot thing absolutely could be the reason.
In terms of routes I want to see JAX get, tops on my list would be Delta running a JAX-SLC flight. They likely won't add while SLC is a little gate constrained (they're at a weird phase in their airport rebuilt and are using bus gates for some flights), but this would be REALLY nice for west coast connections.
The JetBlue LAX direct was just as empty as the previous Delta flight, of which I flew almost weekly (the red-eye return absolutely sucked on both routes).
Now that the route has failed with two different carries, I have to agree that the SLC direct would be the best option for Delta fliers out of Jax looking to connect to the West Coast. Although, there are so many West Coast combos/connectors out of direct flights from Jax to ATL and Detroit (the old Northwest routes), that I have to believe that a direct Jax to SLC is low on the priority list. When flying to the West Coast now, I'm using the Detroit route to avoid the scourge that ATL has become since the pandemic started (not that it was previously a cake walk where you never missed connecting flights before the pandemic).
A little double-speak but I could also see Delta taking over the entire new concourse with an expanded Delta Sky Club and adding at least 6-8 more direct flights to existing hubs in NYC, SLC, Minneapolis and Detroit.
My late stepfather, a former Northwest and Delta pilot, is likely rolling in his grave with how much Delta's pilots pay has increased since he was forced to retire at age 60. He would have loved to bank 5 more years of good earnings (now the FAA is even considering raising the retirement age again to 67). The pilot shortage thing is a real problem for airlines right now.