As summer approaches, the usual cost-saving tricks are no match for the current demand Travelers who haven’t yet booked summer vacations are left with tough choices: Pay steeper prices, find other ways to save on their trips or stay closer to home. etienne laurent/Shutterstock The tricks travelers have long relied on to save on airfares and trips may not go so far these days. The cost for flights is surging ahead of summer: Airline fares rose 18.6% between March and April, according to the latest data from the consumer-price index . Compared with a year ago, airfare prices are up 33.3% on an unadjusted basis. To Read the Full Story Continue reading your article with a WSJ membership