Originally Posted by
BusTrav8yrs
Its an upgrade anyway, not purchased. Don't know why OP would expect entrance on a coach fare anyway.
I think the OP was confusing the JFK-West Coast exception DL has for business/first flights. As previously mentioned this does not extent to all NYC.
If flying from JFK to West Coast it doesn't matter if you were upgraded or purchased business/first - you do have access to SkyClub