Here are Mumbai hotels that commonly run bookings with free upgrades or meaningful added perks — and the easiest ways to get them. (All perks below are usually subject to availability and the hotel’s terms.)

Top hotels & current-type offers

• Fairmont Mumbai — launch offers include complimentary upgrade to the next room category plus airport transfer, hotel credit, breakfast and early/late check‑times. (fairmont.com)
• Four Seasons Hotel Mumbai — promotional “Stay Longer” rates (e.g., third night complimentary on qualifying dates) and other package perks. (Useful when you want a free night rather than a category upgrade.) (fourseasons.com)
• The Leela Mumbai — direct‑booking/business packages that include club‑lounge access, two‑way airport transfers and breakfast (plus other bundled perks). (theleela.com)
• The Taj Mahal Palace (and other Taj properties) — regularly run packages (breakfast, F&B credits, transfers) and are widely available through luxury channels that include “upgrade on arrival” perks for qualifying bookings. (tajhotels.com)
• The Oberoi Mumbai — member/web‑exclusive promotions and Oberoi One membership benefits (discounts, special credits and periodic upgrade/-suite‑experience offers). (oberoihotels.com)
• ITC (ITC Maratha and other ITC hotels) — Club ITC / direct offers and curated packages with lounge access, breakfast and member savings; ITC also runs limited-time upgrade/promotional packages.