Changing a Reservation: $30-$200

For years there has been a charge for changing a reservation, but itinerary modifications have skyrocketed in this era of service fees. United Airlines has hiked its ticket-changing charge from $100 to $150. And though Delta's charge starts at a humble $30, that's only for changes made to reservations made through Delta.com; altering an international itinerary could add $200 to your budget. Keep an eye on the fine print: Discounted tickets tend to have higher change penalties than elite-class tickets. (For that matter, many of these fees don't apply to elite-class tickets.) United's new rate is surprisingly egalitarian, however—it applies to all traveler classes.