It’s beginning to look like a stay-at-home summer for more and more U.S. travelers.

According to Cirium, an aviation analytics company that tracks travel bookings, reservations for U.S. to Europe flights are down more than 11%, but bookings from Canada to Europe are up, and bookings from Australia to Europe are up more than 24%.

Translation: Europe looks to be very crowded this coming summer, but with fewer American travelers.

Hotels will be full in Europe.

In the U.S., a similar situation may be emerging.

With hotels also being full — not with European travelers, where bookings to the U.S. are down 15% — but with Americans choosing to travel within the U.S.