|Quoting SLCUT2777 (Reply 1):|
Delta is planning to start service to Puerto Plata about that time and have upgraded this flight from a CRJ-7 to a 738. POP will be more of a high traffic route at this time of year since after Punta Canta (PUJ), it is the other large resort airport in the D.R. POP is also home to the least pricey all-inclusives in the entire Caribbean.
STI is only a short drive away, and DL probably figures it can best be served with mainline service from ATL going into POP and maximize the loads at this time of year. Also keep in mind DL has a shortage of 738 and 752 a/c