Marriott Bonvoy maintains a highly integrated and "preferred" partnership with United Airlines through their "RewardsPlus" program. This collaboration is the most robust in the industry: Marriott Ambassador and Titanium Elite members receive complimentary United MileagePlus Premier Silver status, which includes free checked bags and economy plus upgrades. Conversely, United Premier Gold members and above receive complimentary Marriott Bonvoy Gold Elite status. Beyond United, Marriott has over 40 global airline partners—including American Airlines, Delta, Emirates, and British Airways—where you can transfer your Bonvoy points into miles. A key benefit of these partnerships is the "60,000 Point Rule": for every 60,000 points you transfer to most airline partners, Marriott adds a 5,000-mile bonus (and with United, that bonus is often 10,000 miles). In 2026, Marriott also features a unique partnership with Emirates (Your World Rewards), allowing elite members to earn both points and miles simultaneously on flights and hotel stays, making it a powerhouse for international business travelers.