Trivia: Dr. Spencer Reid is the son of an attorney, born in Las Vegas. In real life, Matthew Gray Gubler, the actor who plays Reid, is also the son of an attorney, born in Las Vegas.
Trivia: Rick Dunkle, a Criminal Minds producer, writer, and script coordinator, has a cameo as Jonathan, the dead driver in the car that was hit by the tractor trailer, at the start of the episode. *Spoiler* Dunkle, who is a fan of Star Trek: The Next Generation, thought it would be cool to be killed by 'Wesley Crusher' who's played by Wil Wheaton, and who guest stars in this episode.
Snake Eyes - S7-E13
Trivia: On the plane to Atlantic City, the team is discussing their favorite Mob movie, and Rossi mentions that he's not a fan of them. Joe Mantegna, who plays Rossi, played a mobster in The Godfather Part III and, more famously, is the voice of Mob boss Fat Tony in The Simpsons.
Tabula Rasa - S3-E19
Trivia: When Rossi's on the telephone in his office, the camera pans around and on the desk we see the real-life photograph of the actor Joe Mantegna with friend Ringo Starr.
Trivia: Alana De La Garza guest stars as Clara Seger in a crossover with Criminal Minds: Beyond Borders. She and Adam Rodriguez previously played siblings on CSI: Miami.
Trivia: Although only in flashbacks, "Nelson's Sparrow" was the first episode to feature Gideon since Mandy Patinkin's departure.
Trivia: Daniel Henney is the first actor from one of the Criminal Minds spin-offs to join the main cast of the parent series.
Trivia: Ben Savage plays a younger version of Mandy Patinkin. One of Patinkin's most famous roles (and also one of his personal favorites) is Inigo Montoya in The Princess Bride, which also featured Savage's older brother Fred.
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.