Frieds will go from DUS (Germany) to San Franciso with Alitalia via Malpensa. For some reasons, they have decided not to spend their holidays in CAL, but in Denver, Colorado. So, they need a ticket to Denver. I checked the fares and realised that the best is a UAL fare. This is a non refundable and not changeable fare. I suggested them to calculate a connection time of about 3 hours (immigragtion ....). What will happen if Alitalia will have a long delay (Malpensa!!!) and my frieds will not get the connection. Are they entitled to be booked on the next aircraft? Any help appreciated. Thanx.