While there were some good airfare deals to be found earlier this spring, expect elevated fares this summer. The median round-trip fare has climbed 12%, to $357.36, since the beginning of 2021, according to TripActions Inc. To snag the best rates, avoid booking flights on weekends, and try to book weeks or even months in advance. If your destination isn’t fixed, consider less popular vacation spots or airports, too, as reaching them via plane is often cheaper.