Hello Matt, and welcome.
I had open surgery, spent 4 1/2 days in hospital. Only had to travel 30 minutes less home by car, and for me, it was rough, felt every bump and pothole. Not sure I would have been comfortable being in the confines of an airplane seat for that long. On the catheter side, the average leg bag holds about 400ml. May or may not be enough, without having to empty in the plane's toilet, if you can get to it. I did have one leg bag that held 1000 ml, so you might want to look into a bigger one. I woudln't reccomend using the "night" bag, or the large one, as it would be too easy to tangle the tube, and it would be difficult to store or get out of the way on a crowded plane. Just my take.
David in SC
Age: 58, 56 dx, PSA: 7/07 5.8, 10/08 16.3
3rd Biopsy: 9/08 7 of 7 Positive, 40-90%, Gleason 4+3
open RP: 11/08, on catheters for 101 days
Path Rpt: Gleason 3+4, pT2c, 42g, 20% cancer, 1 pos marg
Incont & ED: None
Post Surgery PSA: 2/09 .05,5/09 .1, 6/09 .11. 8/09 .16
Post SRT PSA: 1/10 .12, 4/8 .04, 8/6 .06 11/10 Not taking it
Latest: 6 Corr Surgeries to Bladder Neck, SP Catheter since 10/1/9, SRT 39 Sess/72 gy ended 11/09, 21 Catheters, Ileal Conduit Surgery 9/23/10