Raleigh-Durham (RDU) is an international airport, while Fayetteville (FAY) is a regional one. It's not unique to Fayetteville for air travelers to opt out of their local airports' limited offerings in favor of RDU. Cities such as Danville, Burlington, or Greenville--all three of which are in adjacent TV markets--could be included as well.
Despite the difference in airports (and being joined in a hyphenated TV market, the two areas are separate and distinct:
- Two separate radio markets
- Different economic engines (education/medicine/research-Research Triangle Park) vs. military/industrial/agriculture-Fort Bragg/Pope Army Air Field)
- Over an hour away from each other via interstate (and that's not a direct connection--you have to take I-40 East to I-95 South)
- Fairly self-contained as far as retail and entertainment
- Different weather patterns and conditions
Fayetteville is culturally and economically more tied to Lumberton (in the Myrtle Beach-Florence market) than RDU. Really the only time you see Raleigh, Durham, and Fayetteville together is on top of the hour IDs and on the local newscasts when they stretch to cover the two different areas, be it the two useless token Fayetteville Traffic Cams in the morning, an extra long list of election returns/school closings, or interrupting a Spring Lake (near Fayetteville) viewer's favorite show about a thunderstorn in Oxford (near Raleigh). Often, even TV promotions where, say, Wheel of Fortune is "coming to your town" will require two separate events for Raleigh and Fayetteville. One of Fayetteville's two TV stations, WFPX, channel 62, literally doesn't even register in the Raleigh-Durham part of the market (not even a faint picture in analog days and with digital it actually shares UHF channel 36 with Roanoke Rapids public TV station WUNP-TV in the far northeastern corner of the market).
Again, market rank (now #24) and lots of money are at stake, and both take precedence over viewer convenience or the separate areas argument, so Fayetteville always has and always will be joined to Raleigh-Durham as far as local TV is concerned.