Originally Posted by
RRDD
Airlines do not give refunds if the price drops at a later date. However, your itinerary will be re-priced if you change your flight. Your oriiginal flight may have cost $400, but if it currently sells for $300, then the airline will price your change request at $300+$150-$400 = $50.
At least with some airlines, the $50 of which you speak could actually be a $150 charge and a $100 credit to use on your next flight. Furthermore, the expiration date on the $100 credit could be the original ticket date plus 1 year.
For a frequent flier, the distinction is likely minor. You take your $100 and apply it to your next flight. For an infrequent flier, the utility of the residual credit is definitely something to consider.