We bought first class United tickets to Cabo last August for March 8 - March 22. February 3, they sent us an email saying they had changed the planes, and to notice the changes in red. The only changes in red were the time. l looked at the email a day later, and noticed we didn't have seats for the flight down there (which was full), and were in row 29 for the flight back. I called United and managed to get on the next flight (which left 2 hours later), but we had to come back a day earlier. The manager I talked who changed the tickets opened up a 'customer care' thing to get some of our money back or at least get points (which I can NEVER use). Guess what - got a reply from United 'customer care' and this is what they replied:
"Seat assignments are not guaranteed. Unforeseen operational changes, such as aircraft substitutions, can occur at any time due to maintenance and unexpected schedule adjustments. When customers are transferred to a different aircraft, the system attempts to reassign seats as close to the original seats as possible.
Unfortunately, we are unable to reimburse you for the inconvenience, loss of time or absorb the cost of unused prepaid hotel accommodations, special events or ground transportation at your destination. "
So I guess if you buy your tickets 6 months in advance, it doesn't mean anything. And if you pick your seat assignments, that doesn't mean anything either.
Just wanted to let everybody know to check your tickets
btw - United is the ONLY airline that flies direct from Houston, or we'd try another airline.