If you’re planning a summer vacation you might be able to fly more cheaplyif you buy your tickets soon. The major airlines have cut fares 10 to 15percent out of several Iowa destinations. Des Moines travel agent TerryBeech is expecting more business thanks to the fare war.Beech says the discount seats are filling up fast and travelers who areinterested in taking advantage of the cheap rates need to act quickly. Youmust complete travel by the 30th of September and buy tickers by June 18.She says a flight from Des Moines to Tampa may cost around 320 dollars now,down from around 390 a few days ago.