Originally Posted by
canadiancow
No, you booked what you booked. If you want to make a change, you can call and pay the fare difference, or throw eUpgrades at it.
There should be no fare difference as the zone and distance didn't change. But the ticket would be repriced to current levels. Too risky.
BTW, they did something similar to us with an ACV booking. The Q400 on YXU-YYZ segment was replaced with a CR9 for a month. Just in time for our outbound vacation flight. I called in and ACV plainly refused to rebook us to J. Got upgraded anyway, but that's a different story.