Delta Air Lines over the last few years has withdrawn permission to display its fares on about 30 sites and apps, such as Hipmunk, Fare Compare and Hopper. And now JetBlue has removed permission for a dozen mostly small OTAs (most notably Vayama) to sell its fares.

Is booking flights on Hopper safe?

Booking with Hopper is quick, easy, and secure. These flights are real. These prices are real. There are no hidden fees or gotcha charges.

How do I book a flight with a hopper?

If you're unfamiliar with Hopper, here's how it works: You tell the app where you want to go, and it shows you a calendar with price breakdowns for round trip flights on different dates. You select the round trip flight you want, and you can either choose to book now or watch the trip.