Easter egg: In the special features on Disc 6, select "The Making of Criminal Minds" and press up on your remote. A small "x" should become highlighted. Select it to view the presentation of the "First Annual Gooby Awards", a collection of fictional awards for the cast and crew.
Easter egg: In the special features on Disc 6, go down to "Inside Quantico and the Criminal Mind", and press right on your control; this should highlight the image of a gun. Select it to view a short tour of the CM offices and set with Edward Allen Bernero's assistant Rosalie.
Chosen answer: Black SUVs are common police, military and dignitary vehicles around the world. It is not too much to assume they could be rented or owned by the police forces in the areas.
kristenlouise3
Other people have explained it but fore more information, federal cars would most likely be brought to the airport from the nearest agency, so they can drive out to their locations especially in rural situations.