It could already boast that it was the largest city in terms of total area in the contiguous United States. Now Jacksonville, Fla., can add another feather to its cap: Most Affordable Meeting City. The northeast Florida city earned the top spot in GetThere's Top 10 Most Affordable Cities. GetThere is a Web-based travel reservation system. The company created a mock three-day, 100-person meeting and rated cities based on overall meeting cost. Runners up included No. 2 Indianapolis and No. 3 Atlanta.