"HotelsCombined noticed the shift towards mobile bookings back in 2014. Since then we have seen mobile bookings continue to grow year on year, while desktop bookings have decreased," said HotelsCombined travel expert Chris Rivett. "We believe that this number will continue to rise as more and more people embrace a mobile or tablet as their primary device." Top source market for mobile bookings is California while Rhode Island, Vermont, Michigan, Iowa and Indiana recording the fastest growth rates last year. HotelsCombined said nearly three-quarters of US smartphone bookings are typically made 48 hours before travel. Get the full story at Travelmole Read also "Facebook’s head of travel on hotels going mobile"