Originally Posted by
DebitNM
I wasn't able to see when "later" is and if the fare is locked in at the current price or if it can fluctuate.
Typically, for standard economy fares, "later" means within three days. The on-line reservation system is very clear on the deadline for ticketing. If you do not ticket within the deadline the reservation is canceled. If you do, your price quote is guaranteed.
Shuly