A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
Prices depend on markets, not geography. The price difference could be negative or it could be enormous.
Usually it's best to start with the travel agent who wrote the ticket. Sometimes the airline will make changes to a ticket they didn't issue, but they can impose an additional fee for doing this.