Airbnb forecast third-quarter revenue below estimates on Tuesday and warned of shorter booking windows, suggesting travelers were waiting until the last minute to book due to economic uncertainty, sending its shares down about 14.63% after the bell.

Domestic travel in the United States has been pressured since the start of the year as more Americans have grown cautious about travel spending on worries about the health of the U.S. economy.

San Francisco-based Airbnb reported quarterly profit of $555 million, or 86 cents per share, compared to $650 million, or 98 cents per share last year.

It expects third-quarter revenue to be between $3.67 billion and $3.73 billion, below analysts’ estimate of $3.84 billion, according to LSEG data.

The company expects moderating growth in nights booked in the third quarter and said it was experiencing shorter booking lead times globally.

Booking lead time is an important metric in the travel industry and refers to the number of days between the reservation date and actual arrival. A shorter booking window can indicate consumers are booking travel at the last minute, due to increased uncertainty and caution in spending.

Travel reservations provider Booking also said earlier this month that lead times had shrunk in the second quarter and were expected to shrink further in the third.