Soaring oil prices have left many Americans with higher costs and fewer options for travel amid the Iran warTell us: have your holiday plans changed in light of recent world events?Chelsea Blackmore saves up every year for an annual vacation with her 58-year-old mother. This year, after landing an especially good deal, they made plans to embark on a Disney cruise from Orlando.To keep costs low, she bought the least expensive plane tickets she could find: a $500 round trip fare on Spirit Airlines...