LET’S FIND A DEAL: Summer airfares are averaging $431, up 2.6 percent from last year, according to Kayak.com. But there are still plenty of deals to be found if travelers have a sense of adventure and a willingness to fly on short notice. For instance, each Tuesday, airlines email offers for that coming weekend or the following one to fliers who have signed up for alerts.

TWITTER AND FACEBOOK: Airlines are experimenting with sales on social media. At the forefront is JetBlue.