It has been some time since I flew into what was called a TCA, now it is Class B airspace. My question is if I have a mode C transponder set at 1200, and I want to fly  through a VFR corridor in class b, do I need to contact the tower or approach control for permission before entering.  I want to fly direct from Rolla MO, VIH to Burlington WI KBUU which would put me right on the edge of the St Louis Class B where it is 80/45 MSL. I'm a PP flying as SP


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As long as you stay above 8000 ft msl and below 4500 ft msl, no need to contact approach. Someone correct me if I'm wrong.

If you are going to fly "around"(above/below) the class B you do not need to contact them. You do need permission if you want to fly through it. When I fly from my home base on Long Island to NJ, I have to contend with the JFK class B. Initially I would fly under it which is a scenic 500' at one point. It's along the shoreline so other than other aircraft not anything you're going to fly into. More recently I used flight following and they cleared me through it at 6500'.


I went into the AOPA flight planner and typed in a route KVIH direct to KBUU.  It showed me a route that was well west of the St. Louis Class-B airspace.  However, as James is correct in saying, no radio contact is necessary, even if your ground track took you through the part of the sectional that says 80/45, as long as you were either above 8000 MSL or below 4500 MSL. Very important to understand they are MSL altitudes, and not AGL for this Class-B airspace.  

Have a nice flight,


Please correct me if I am wrong, but I have found that Flight Following, if available, invaluable when transiting "tight" airspace where the possibility of other aircraft wandering is increased because of the high traffic volume; yea, I even find it so in the boondocks where radar coverage is available. I would never intentionally be without it, especially in VFR corridors. It's also better than a flight plan.



I just said it wasn't a requirement. Use all the tools at your disposal to make your flight as safe as possible. It's good practice too.



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