Similar to airlines, hotel groups also have bilateral partnerships with many airlines. You can transfer points from a hotel chain to book flights with an airline, or use airline points for hotel stays or upgrades.

Knowing which hotels belong to which group can help you plan your trips better and accumulate points/miles for future flight bookings.
Another option is to use purchased points from platforms like Livelo/Esfera to elevate your status within a hotel group and access various benefits.

Important:
Always check the conversion rate (Points:Miles) for each hotel group and calculate which offers the best value for YOUR usage.

Below, you'll find some of the world's major hotel chains and their various hotel sub-brands.

Marriott - Marriott Bonvoy

The Marriott group is a giant in the hotel industry, with partnerships with over 30 airlines and a massive global presence.

Marriott boasts various hotel brands, ranging from luxurious options like Ritz-Carlton to more approachable yet sophisticated brands like Courtyard.

You can explore all of Marriott's hotel brands on the Marriott Brands page.

Additionally, you can transfer Marriott points to many other airlines, as indicated in the Marriott Partners page.
The conversion rate from Marriott points to airline miles is typically 3 Marriott points to 1 airline mile for most airlines.

Accor Hotels - ALL - Accor Live Limitless

Accor Hotels is one of the largest hotel chains in the world, with partnerships with various airlines such as LATAM, TAP, Iberia, Emirates, and others.

The group comprises various hotel brands, including Ibis, Novotel, Mercure, Sofitel, Pullman, among others.

The complete list can be found on the Accor brands page.

Currently, there's an interesting partnership with AirFrance / KLM, where you can accumulate points in Accor's loyalty program (ALL) and FlyingBlue miles from AirFrance / KLM simultaneously, resulting in double points. And if you pay with a credit card that also earns points in any program, you effectively generate TRIPLE POINTS.

Additionally, you can transfer your ALL points to many other airlines, as can be verified on the Accor partners page.

IHG - IHG Rewards Club

IHG is one of the world's largest hotel groups, with partnerships with various airlines such as KLM, TAP, British Airways, Emirates, and others.

The group comprises various hotel brands, including Holiday Inn, InterContinental, Crowne Plaza, among others.

The complete list can be found on the IHG brands page.

Hyatt - World of Hyatt

Hyatt is another major hotel group, consisting of nearly 30 individual brands worldwide. In addition to the loyalty program, they also offer credit cards in some countries, similar to other mentioned groups.

A unique feature of the Hyatt group is that it includes Spas and Resorts around the world, in addition to hotels.

The complete list of Hyatt hotel brands can be found on the Hyatt brands page.

Hilton - Hilton Honors

Hilton is one of the most well-known and prestigious hotel groups globally, founded in 1919 by Conrad Hilton.

Presently boasting 19 brands worldwide, including renowned names such as Hilton, Conrad, Waldorf Astoria, and DoubleTree.

The Hilton group also offers a range of credit card options in various countries.

The full list of Hilton hotel and resort brands can be explored on the Hilton brands page.

Of course, there are many other hotel groups, often with loyalty programs, credit card options, and partnerships with various airlines, much like the groups mentioned here.

Once again, research hotels in the places you frequently travel to or in future destinations you plan to explore. Similar to airlines, always have a backup hotel chain in mind to take advantage of opportunities and maximize your stays and points.