That is simply false. Regardless of who you're hearing it from, they are misinformed or lying.
Just two days ago a CSPV Priest FLEW in to say Mass on Christmas for us, and then FLEW back out.
Why do you keep emphasizing this particular point when it's simply verifiably FALSE?
Nobody's lying and nobody WAS misinformed, even if that's changed due to the TSA pre-check. Bishop Kelly and those near to him refused to fly for years because of the TSA scanners, to the point that Bishop Santay did a driving tour of the country for confirmations, sometimes taking a day or two (or longer) to get from one location to the next. If it's changed recently, then it's due to the fact that they can get around the scanners now with the change in regulations.
And the rift between SSPV and CSPV is not false either. Round Top nuns abruptly left Cincinnati at one point, and the CSPV was created for no obvious reason. When looking at their website for "Why the congregation?" they state that it was founded due to their reading of Canon Law that priests should not be "unattached" (aka "vagantes"), which sounds like a Gerry Matatics or HomeAloner reading of Canon Law. In fact, the denunciation of "vagantes" priests has long been at the core of Home Aloner rhetoric. Combined with the fact that they have a ton of priests and nuns out there while chapels are left to languish, something stinks at Round Top.
You have the old-schoolers like Frs. Jenkins and Mroczka, the latter having lived by himself for years up at White Bear Lake ... and these never stopped flying, but the group attached to Bishop Kelly most certainly did.