Bouchard,

If you’re suggesting that flights are being cancelled due to under booking, I learned a long time ago they are just as apt to cancel a full flight as they are an under booked one. We had a Good Friday flight that was fully booked (but for one or two seats in First Class and sadly, there were four of us at the time.....) and they cancelled the Palm Sunday before our trip. No rhyme or reason - they just flat out cancelled the flight. This was AA out of JFK quite a few years ago and long before flight cancellations became the norm they are today. They compensated us nicely and did find us other flights that day but it was still a major nightmare at the time.