Passport Number Changed - What to do with tickets already booked
Hi,
I have tickets for 2 flights in March and 2 April booked, USA and UK. My passport was set to expire in June so I decided that it was best to renew it. I just received the new one today and noticed the number changed. I didn't think about this when I booked the ticket. So is this a serious problem that I have to contact Air Canada for?