Loyalist Travel| Hotel | Program | Got an upgrade |
|---|---|---|
| Metropole, Bangkok, a Tribute Portfolio HotelTribute Portfolio · Bangkok, Thailand | Marriott Bonvoy | Not enough stays yet |
| Metropolitan at The 9, Autograph CollectionAutograph Collection · Cleveland, Ohio | Marriott Bonvoy | Not enough stays yet |
| Mexico City Marriott Reforma HotelMarriott Hotels · Mexico City, Mexico · Club lounge | Marriott Bonvoy | Not enough stays yet |
| Midnight Hotel, Autograph CollectionAutograph Collection · Canberra, Australia | Marriott Bonvoy | Not enough stays yet |
| Milan Marriott HotelMarriott Hotels · Milan, Italy · Club lounge | Marriott Bonvoy | Not enough stays yet |
| Milwaukee Marriott DowntownMarriott Hotels · Milwaukee, Wisconsin | Marriott Bonvoy | Not enough stays yet |
| Minneapolis Marriott Northwest Hotel & Conference CenterMarriott Hotels · Minneapolis, Minnesota | Marriott Bonvoy | Not enough stays yet |
| Minneapolis Marriott SouthwestMarriott Hotels · Minneapolis, Minnesota | Marriott Bonvoy | Not enough stays yet |
| Minneapolis Marriott WestMarriott Hotels · Minneapolis, Minnesota | Marriott Bonvoy | Not enough stays yet |
| Minsk Marriott HotelMarriott Hotels · Minsk, Belarus · Club lounge | Marriott Bonvoy | Not enough stays yet |
| Miri Marriott Resort & SpaMarriott Hotels · Miri, Malaysia · Club lounge | Marriott Bonvoy | Not enough stays yet |
| Mobile MarriottMarriott Hotels · Mobile, Alabama | Marriott Bonvoy | Not enough stays yet |
| MonAsty, Thessaloniki, Autograph CollectionAutograph Collection · Thessaloniki, Greece | Marriott Bonvoy | Not enough stays yet |
| Mont Gabriel, Sainte-Adèle, a Tribute Portfolio ResortTribute Portfolio · Montreal, Canada | Marriott Bonvoy | Not enough stays yet |
| Montcalm East, Autograph CollectionAutograph Collection · London, United Kingdom | Marriott Bonvoy | Not enough stays yet |
| Montcalm Mayfair, Autograph CollectionAutograph Collection · London, United Kingdom | Marriott Bonvoy | Not enough stays yet |
| Montcalm Royal London House, Autograph CollectionAutograph Collection · London, United Kingdom | Marriott Bonvoy | Not enough stays yet |
| Monterey Beach Hotel, a Tribute Portfolio HotelTribute Portfolio · Monterey, California | Marriott Bonvoy | Not enough stays yet |
| Monterey MarriottMarriott Hotels · Monterey, California | Marriott Bonvoy | Not enough stays yet |
| Montgomery Marriott Prattville Hotel & Conference Center at Capitol HillMarriott Hotels · Montgomery, Alabama | Marriott Bonvoy | Not enough stays yet |
| Montien Riverside Hotel BangkokMarriott Hotels · Bangkok, Thailand · Club lounge | Marriott Bonvoy | Not enough stays yet |
| Morrison House Old Town Alexandria, Autograph CollectionAutograph Collection · Washington, D.C. | Marriott Bonvoy | Not enough stays yet |
| Mostar Marriott HotelMarriott Hotels · Mostar, Bosnia and Herzegovina · Club lounge | Marriott Bonvoy | Not enough stays yet |
| Mulberry Shades Bengaluru Nandi Hills, a Tribute Portfolio ResortTribute Portfolio · Bengaluru, India | Marriott Bonvoy | Not enough stays yet |
Got an upgrade is the share of stays that got any room upgrade, out of those that said, with recent stays counting more. It shows once 3 stays have said; until then, a dash.