| Service Types | Flights, hotels, vacation packages, train tickets, car rentals, travel insurance | Hotels, resorts, motels, guest houses, apartments and long stays; car rentals; business travel booking; member prices and VIP Access properties | — | — |
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| Business Model | Online travel agency (OTA), flight-led, with a paid Prime subscription model | Online travel agency (OTA) specialising in accommodation; part of Expedia Group's shared marketplace | — | — |
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| Markets Served | Europe-centred, operating across 44 countries; group partners with nearly 700 airlines | Global via country sites; loyalty scheme differs by market (One Key in US & UK) | — | — |
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| Inventory Scale | — | Hundreds of thousands of hotels | — | — |
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| Loyalty Programme | eDreams Prime paid subscription (since 2017): member discounts on flights and, since 2020, hotels; group-wide 7 million+ members by Feb 2025 | US & UK: One Key (2% OneKeyCash on eligible bookings, higher at VIP Access properties for Silver/Gold/Platinum); other markets kept Hotels.com Rewards (10 nights = 1 reward night) | — | — |
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| Cancellation Policy | — | Set per property and rate; many hotels offer free cancellation, some only until more than 24 hours before check-in | — | — |
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| Parent Company | eDreams ODIGEO (Madrid, Spain) | Expedia Group (operating company since 2005) | — | — |
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| Founded | 1999 in Silicon Valley; group headquartered in Madrid, Spain | 1991 as Hotel Reservations Network in Dallas, Texas; renamed Hotels.com in 2002 | — | — |
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| Customer Support | — | 24/7 support before, during and after trips; online help and contact page; US phone line 1-800-2-Hotels | — | — |
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| Sister Brands | Opodo, GO Voyages, Travellink, Liligo (travel search) | — | — | — |
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