If I did not know the numbers from previous research, I would have a hard time guessing which is the bigger global reservationist for hotel bookings.

First look at who is part of the Priceline Group.

Priceline.com, booking.com, kayak.com and Agoda.com are major players in the online travel agency (OTA) world.

Expedia Inc. includes Travelocity, Orbitz, Hotels.com and Hotwire.com.

Hotels generate the majority of revenue for OTAs compared to airline ticket sales.

Priceline Group booked 104.6 million room nights in Q1-2015.

Expedia Inc. booked 47.6 million room nights in Q1-2015.

The Winner: Priceline, by a large margin

Priceline Group has 635,000 hotels in its listings compared to 510,000 for Expedia.

Priceline Group made $1.84 billion in revenue with $333 million net income compared to Expedia Inc. with $1.37 billion in revenue and $32.56 million in net income.

Priceline Groups booking.com is the largest single seller of hotel rooms globally.

The Skift Take is Expedia’s faster growth in the past year compared to Priceline should narrow the gap between Expedia and Priceline in coming years. Check out the article for more details and a financial graphic comparing Expedia and Priceline.

Skift – Priceline Vs. Expedia: By the Numbers in First Quarter 2015 (May 8).

Loyalty Traveler – Will Amazon challenge Expedia and Priceline for hotel bookings? (Jan 20, 2015)