I guess that could happen, we have never had a flight time change however we have had flight numbers changed once.
. (third time we've bought tickets more than 6 mths. in advanced)
Yes, it is risky to some extent. But it is well worth the savings. I never purchase a ticket from dallas for over $200. as
for where you are flying from i am not sure what a bargin is. but i would be no more than $200 would be good?
what is your rate?
hope this helps you worry less.