A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,413
As a very general rule, if you see a low DL flight number, the flight will be operated by DL. High DL flight numbers (over about 3000 for DL) will be either RJs or operated by partners. Either should be indicated on the itinerary as well as during the booking process on delta.dumb. (This is a USA regulation.) For DL, specific ranges of higher numbers mean particular DL Connection carriers, other ranges apply to codeshare partners, and still more (like 99XX) are reserved for special sections and charters.