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The Mission Inn Hotel & Spa Riverside, California
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Hotel comparison guide

The Mission Inn Hotel & Spa vs Sheraton Ontario Airport Hotel

The Mission Inn Hotel & Spa is a National Historic Landmark in downtown Riverside with a full-service spa, several restaurants, and a heated outdoor pool—best for travelers who want history, dining, and a walkable cultural district. Sheraton Ontario Airport Hotel is a full-service, Marriott-family airport hotel in Ontario geared toward business travelers and visitors needing convenient access to Ontario International Airport and meeting space.

Updated · about 14 miles apart

Suite with separate living area and king bed visible through doorway at The Mission Inn Hotel & Spa

The Mission Inn Hotel & Spa

Historic landmark · Full-service spa · Downtown, walkable

Best for history, on-site dining variety, and a spa-centered city stay.

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Sheraton Ontario Airport Hotel, Ontario, California

Sheraton Ontario Airport Hotel

Airport hotel · Marriott-family · Meeting-friendly

Best for airport access, predictable Marriott-style service, and meeting or event needs near the Ontario Convention Center.

Quick Verdict: The Mission Inn Hotel & Spa vs Sheraton Ontario Airport Hotel

When The Mission Inn Hotel & Spa wins: choose the Mission Inn if you want a stay that’s part-hotel, part-museum — historic architecture, multiple distinctive restaurants, celebrated steakhouse, and Kelly’s Spa make it a destination in its own right.

When Sheraton Ontario Airport Hotel wins: pick the Sheraton for easy access to Ontario International Airport, straightforward full-service amenities (outdoor pool, fitness center, business center), and a location convenient to the Ontario Convention Center and Ontario Mills shopping.

Bottom line: The Mission Inn is a good match for leisure travelers, couples, and event guests who value atmosphere, dining, and a large on-site spa; the Sheraton is a practical choice for business travelers and guests prioritizing airport convenience and predictable Marriott-brand services.

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The Mission Inn Hotel & Spa vs Sheraton Ontario Airport Hotel – At a Glance

Side-by-side facts for The Mission Inn Hotel & Spa and Sheraton Ontario Airport Hotel
CategoryThe Mission Inn Hotel & SpaSheraton Ontario Airport Hotel
Overall vibeHistoric, landmark property with ornate public spaces and museum features.Modern, functional Marriott-family airport hotel focused on convenience.
LocationDowntown Riverside — walkable to museums, Fox Performing Arts Center, and Riverside Convention Center.Near Ontario Convention Center and Ontario Intl. Airport; convenient for mall and arena visits.
Size (rooms)238 rooms across 5 floors.164 guestrooms.
Pool & hot tubHeated outdoor pool and Jacuzzi (open daily 6:00 AM–11:00 PM).Outdoor pool and hot tub (pool access 6:00 AM–10:00 PM noted).
Restaurants & barsMultiple restaurants and lounges (Mission Inn Restaurant, Duane's/Steakhouse, Bella Trattoria, Las Campanas, Presidential Lounge, California Lounge, Casey's Cupcakes, Afternoon Tea).One on-site restaurant and one bar/lounge; room service available during limited hours.
SpaKelly’s Spa — full-service Tuscan-inspired spa with 12 treatment rooms, Roman baths, sauna/steam, signature treatments and packages.Not published
Meetings & eventsExtensive historic event spaces and chapels — ~20,000 sq ft, ballrooms and two chapels for weddings and large events.Meeting rooms, ballroom/banquet hall and business center; positioned for conventions and corporate events near the convention center.
Accessibility & family policyFamily-friendly; children welcome (up to 3 children 11 and under may stay free in a parent's room).All-ages property; accessible rooms and facilities plus an accessible airport shuttle.
Parking & transportValet and self-parking (surcharges), EV charging station; airport transfers typically via rideshare or taxi.Free self parking on-site; airport shuttle available for a surcharge (on request).
Brand & ratingIndependent historic hotel — 4-star (Mission Inn marketing) with landmark status.Sheraton (Marriott family) — 3.5 stars, guest rating 8.4.

A Look Inside The Mission Inn Hotel & Spa

The Mission Inn Hotel & Spa: rooms & suitesRooms & suitesThe Mission Inn Hotel & Spa: pools & beachPools & beachThe Mission Inn Hotel & Spa: diningDiningThe Mission Inn Hotel & Spa: spa & wellnessSpa & wellness
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Location: Downtown Riverside vs Airport-adjacent Ontario

The Mission Inn Hotel & Spa – Location

The Mission Inn sits in the heart of Historic Downtown Riverside, an easy walk to museums, theaters, and city dining.

  • Address: 3649 Mission Inn Ave, Riverside, CA — occupies one city block.
  • Walkable to Riverside Metropolitan Museum, Fox Performing Arts Center, Riverside Art Museum and the Riverside Convention Center.
  • Nearest major airport (Ontario Intl.) is a drive away; rideshare and taxis are typical transport options.

Choose the Mission Inn when you want to be in the middle of Riverside’s cultural district and within walking distance of attractions.

Sheraton Ontario Airport Hotel – Location

Sheraton Ontario Airport Hotel sits near Ontario Convention Center and is convenient for Ontario Intl. Airport access.

  • Address: 429 N Vineyard Ave, Ontario, CA; preferred airport: Ontario Intl. Airport (ONT).
  • About a 2-minute drive to the Ontario Convention Center and within a short drive of Ontario Mills Shopping Mall and Toyota Arena.
  • Offers an accessible airport shuttle (surcharge) and onsite parking for drivers.

Pick the Sheraton for minimal travel time to the airport, convention venues, and regional shopping/arena destinations.

Rooms: historic suites and variety vs standard airport room choices

The Mission Inn Hotel & Spa – Rooms

Mission Inn’s 238 rooms include a mix of named rooms and suites across a historic property; rooms reflect the hotel’s architectural character.

  • Room types include Deluxe Room, Junior Suite, and several rooms with historic names (Glenwood, Raincross, Mission).
  • Rooms are spread across 5 floors in a National Historic Landmark building; rollaway beds and cribs available for a fee.
  • Check-in begins at 4:00 PM; the property requires a card for incidentals and authorizes an additional daily amount.

If you value characterful, historically themed rooms and a larger property, Mission Inn delivers that experience.

Sheraton Ontario Airport Hotel – Rooms

Sheraton Ontario Hotel offers standard full-service hotel rooms and a few club/ suite options geared to business and transit guests.

  • Room types (as listed): Room, 2 Double Beds; Room, 1 King Bed; Club Room, 1 King Bed; Club Suite and Junior Suite corner options.
  • 164 guestrooms with accessible room options (mobility/hearing-accessible variants available).
  • Express check-in/out, safes and desks in rooms, daily housekeeping; check-in begins at 3:00 PM per supplier listing.

Sheraton’s rooms are straightforward and accessible, with a small number of club-level and suite choices for upgrades.

Dining & drinks: many on-site restaurants vs single restaurant option

The Mission Inn Hotel & Spa – Dining & drinks

The Mission Inn’s dining is a core part of the experience, with multiple distinct venues from steakhouse to Italian and a formal restaurant.

  • Restaurants and lounges include Mission Inn Restaurant, Duane's Prime Steaks & Seafood (Steakhouse), Bella Trattoria, Las Campanas, Presidential Lounge and California Lounge.
  • Mission Inn Restaurant serves breakfast, lunch, dinner and Sunday brunch; Duane’s is dinner-focused and AAA Four-Diamond–recognized.
  • Reservations are recommended for popular venues and brunch; varied atmospheres suitable for casual lunches to semi-formal dinners.

Mission Inn is the clear choice for travelers who want several on-site dining atmospheres and a destination restaurant scene.

Sheraton Ontario Airport Hotel – Dining & drinks

Sheraton Ontario Airport Hotel provides a single on-site restaurant and a bar/lounge, suited to travelers seeking convenient meals.

  • Highlighted amenities: one on-site restaurant, one bar/lounge, and limited-hours room service.
  • Breakfast is available for a surcharge (fee range listed by property); vegetarian and vegan options noted in amenity list.
  • Concierge and gift shop/snack options cover basic guest needs without the multiple specialty venues found at the Mission Inn.

Choose Sheraton for practical, convenient dining close to the airport and convention center rather than a wide restaurant selection.

Pools & signature amenity: heated historic pool and spa vs airport-oriented recreation

The Mission Inn Hotel & Spa – Pools & signature amenity

The Mission Inn features a year-round heated outdoor pool and Jacuzzi that are part of the hotel’s spa and leisure amenities.

  • Pool and Jacuzzi open daily from 6:00 AM to 11:00 PM (pool access policies apply around check-in).
  • Pool use is included with spa visit and covered by the daily resort fee for room guests.
  • Pool area complements Kelly’s Spa offerings and the hotel’s relaxation facilities (sauna, steam, relaxation lounges).

Mission Inn’s heated pool is integrated with its spa program — ideal if you plan to spend time at the spa and pool during your stay.

Sheraton Ontario Airport Hotel – Pools & signature amenity

Sheraton Ontario Airport Hotel offers an outdoor pool and hot tub alongside a 24-hour fitness center for active or transiting guests.

  • Outdoor pool and one hot tub; pool hours listed as 6:00 AM to 10:00 PM in supplier notes.
  • 24-hour fitness facilities and wheelchair-accessible pool noted among amenities.
  • Pool complements business and transit needs rather than serving as a resort-style centerpiece.

Sheraton’s pool and fitness options are convenient for short stays and business trips, not part of a wider spa destination experience.

Wellness & nightlife: Kelly’s Spa and lounges vs fitness and business focus

The Mission Inn Hotel & Spa – Wellness & nightlife

Mission Inn emphasizes a full wellness program (Kelly’s Spa) plus intimate lounges for evening drinks.

  • Kelly’s Spa (12 treatment rooms) offers signature treatments (Fountain of Youth), Roman-style baths, and spa packages.
  • Fitness center open 6:00 AM–11:00 PM with modern cardio and strength equipment.
  • Evening options include the Presidential Lounge and California Lounge for cocktails and quiet evenings.

If spa treatments and relaxed evening lounges matter, Mission Inn provides a broader wellness and nightlife feel.

Sheraton Ontario Airport Hotel – Wellness & nightlife

Sheraton focuses on 24-hour fitness and business amenities; nightlife options are limited to the on-site bar/lounge and nearby venues.

  • 24-hour fitness center and business center support work-focused stays.
  • On-site bar/lounge and snack/deli cover late-night needs; nearby Ontario venues serve nightlife and dining.
  • Multilingual staff, concierge services and accessible meeting spaces target corporate and convention guests.

Sheraton is best for travelers who need fitness and business services at all hours, with local nightlife options a short drive away.

Who Wins? Best Pick by Travel Style

Best for a historic, atmospheric stay
Ornate tiled hallway with mosaic floor and mural-lit alcoves at The Mission Inn Hotel & Spa

The Mission Inn Hotel & Spa

The Mission Inn — National Historic Landmark, museum tours, ornate public spaces and architecture.

Best for airport convenience
Sheraton Ontario Airport Hotel, Ontario, California

Sheraton Ontario Airport Hotel

Sheraton Ontario Airport Hotel — close to ONT, airport shuttle (on request), and convention-center access.

Best for on-site dining variety
Reception desk and sculpture in an elegant lobby area at The Mission Inn Hotel & Spa

The Mission Inn Hotel & Spa

The Mission Inn — multiple restaurants and lounges, from a AAA Four-Diamond steakhouse to Italian and Mexican venues.

Best for meeting or convention logistics
Sheraton Ontario Airport Hotel, Ontario, California

Sheraton Ontario Airport Hotel

Sheraton Ontario Airport Hotel — meeting rooms, banquet hall, business center and express check-in/out for business travelers.

Frequently asked questions

The Mission Inn Hotel & Spa vs Sheraton Ontario Airport Hotel: FAQs

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Which hotel is better for a romantic weekend with spa time?

The Mission Inn — it has Kelly’s Spa, couples packages and intimate lounges and restaurants suited to a romantic stay.

Which property is closer to Ontario International Airport?

Sheraton Ontario Airport Hotel is much closer to Ontario Intl. Airport and even lists ONT as its preferred airport.

Are either of these hotels adults-only or restricted by age?

No — both properties are all-ages. The Mission Inn is explicitly family-friendly; Sheraton’s listing does not indicate an adults-only policy.

Which hotel has more on-site dining choices?

The Mission Inn has multiple restaurants and lounges; Sheraton has a single on-site restaurant and one bar/lounge.

More The Mission Inn Hotel & Spa Comparison Guides

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