While the above comments have all been true...that is not to say the aircraft wasn't filmed in Miami at one point.
Every season, usually in the summer, the 2nd Unit will travel to Miami to film all the exterior/atmospheric shots that will be needed for the upcoming season. [When I lived in Dallas as a kid, and my Dad was involved with that stuff; I remember the crew coming to to Dallas for one to two weeks at most - usually in July.
Each star(s) would come out for the day to film the outdoor scenes they were in....I remember one day I hung out with my Dad when Charlene Tilton was being filmed driving a convertible up the driveway leading to Southfork, and then we headed downtown to see her over at Thanksgiving Square having lunch at a FAKE RESTARAUNT with Larry Hagman....There is no outdoor cafe there...Even the shots of J.R. sitting at his desk with the Dallas skyline behind him, were done on a L.A. soundstage.]
So don't be too disappointed Zippy, it is entirely possible that they filmed, an aircraft, or maybe several; for a few different episodes, all on the same day; taking off and landing at MIA
....BUT, everything else is done on a stage in LA
, or as Jetstar showed, even on the streets of L.A..
That place I swear; It substitutes for everywhere!, if you look close in some shots of Dallas, you can see mountains in the background! Oops.
I talked to a producer who told me that they like the haze and smog, because it does a good job of hiding the mountains that would be a dead giveaway that something set in Dallas, or Miami, or Chicago, or wherever, is being faked.
And finally, as EMBQA alluded to....There isn't a police station in the country that looks like the Miami CSI set on the inside in real life!