Best Ontario (OR) Hotels With 18+ Check-In (Updated December 2025)

Nestled in the heart of Malheur County, Oregon, sits the vibrant city of Ontario. This gem boasts a rich tapestry of natural beauty, adventure, and local culture that caters perfectly to young adults seeking an immersive, off-the-beaten-path experience.

Ontario serves as the gateway to desert beauty and riverside recreation, with the Snake River offering white water rafting, fishing, and camping opportunities. Meanwhile, the surrounding desert terrain and rugged mountains provide the perfect backdrop for hiking, biking, and exploration.

For those keen on a cultural immersion, Ontario has a lot to offer. From its historic downtown with unique local shops, delicious eateries, and charming architecture, to its vibrant arts scene, there's always something happening.

Whether you're an adventure enthusiast, a culture vulture, or a foodie, exploring Ontario will surely create unforgettable memories.

Below is a list of hotels and motels in Ontario that allow reservations for guests under 21, including those aged 18, 19, and 20. From cheap options to more adult-focused accommodations, there's a variety of places to rent that fit your needs and preferences!

Please note that hotel policies regarding the minimum check-in age in Ontario can change at any time. While we aim to keep our information updated, we recommend confirming the minimum age requirement with the hotel or motel before making a reservation.