Expedia's third-quarter profit fell 18% from a year earlier as higher administrative costs more than offset the effect of more hotel bookings.
Room-night bookings revenue rose 20% from a year earlier as a 27% increase in room nights booked more than offset a 6% decline in revenue per night. Revenue rose 17%, to $1.2 billion.
Still, selling and marketing costs jumped 24% from a year earlier, while technology and content expenses rose 31%.
Overall, Expedia's net income declined to $171.5 million from $209.5 million a year earlier.
Expedia accounts for about 40% of online travel agency bookings in the U.S., giving it about twice the market share of runner-up Orbitz, according to PhoCusWright. Follow Danny King on Twitter @dktravelweekly.