1) American Airlines

2) Delta Airline

3) Northwest Airlines  Northwest Airlines, NWA.

4) Hilton  HILTON, HAMPTON INN, HAMPTON INN & SUITES, CONRAD HOTELS, HILTON GARDEN INN, DOUBLETREE, DOUBLETREE GUEST SUITES, DOUBLETREE CLUB HOTEL, HILTON GRAND VACATION COMPANY, EMBASSY SUITES HOTELS, HOMEWOOD SUITES BY HILTON, SCANDIC, AmeriSuites, Summerfield Suites.

5) IHG  HOLIDAY INN, HOLIDAY INN EXPRESS, EXPRESS BY HOLIDAY INN, HOLIDAY INN GARDEN COURT, HOLIDAY INN SELECT, HOLIDAY INN SUNSPREE, HOLIDAY INN FAMILY SUITES RESORT, CROWNE PLAZA, INTERCONTINENTAL, STAYBRIDGE SUITES,CANDLEWOOD SUITES, INDIGO, PRIORITY CLUB.

6) Wyndham  WYNDHAM, WYNDHAM GARDEN, SUMMERFIELD SUITES, GRAND HERITAGE. SUMMERFIELD SUITES BY WYNDHAM, WYNDHAM LUXURY RESORTS, WYNDHAM HOTELS, WYNDHAM GARDEN HOTELS, WYNDHAM HISTORIC HOTELS, VIVA WYNDHAM RESORTS, WYNDHAM GRAND HERITAGE, WYNDHAM RESORTS, LA QUINTA, BAYMONT.

7) Marriott  MARRIOTT, JW MARRIOTT, RENAISSANCE, COURTYARD, RESIDENCE INN, FAIRFIELD INN, TOWNEPLACE SUITES, SPRINGHILL SUITES, MARRIOTT VACATION CLUB, RITZ-CARLTON, EXECUSTAY, MARRIOTT EXECUTIVE APARTMENTS. MARRIOTT HOTELS & RESORTS, JW MARRIOTT HOTELS & RESORTS, RENAISSANCE HOTELS & RESORTS, COURTYARD BY MARRIOTT, RESIDENCE INN BY MARRIOTT, FAIRFIELD INN BY MARRIOTT, MARRIOTT CONFERENCE CENTERS, TOWNEPLACE SUITES BY MARRIOTT, SPRINGHILL SUITES BY MARRIOTT, MARRIOTT VACATION CLUB INTERNATIONAL, HORIZONS BY MARRIOTT, THE RITZ-CARLTON HOTEL COMPANY, L.L.C., THE RITZ-CARLTON CLUB, MARRIOTT EXECUSTAY, MARRIOTT EXECUTIVE APARTMENTS, MARRIOTT GRAND RESIDENCE CLUB.

8) Starwood  STARWOOD, SHERATON, FOUR POINTS BY SHERATON, WESTIN, W HOTELS, ST. REGIS, LUXURY COLLECTION.

9) Choice International Hotel  CLARION HOTEL, CLARION RESORT, CLARION SUITES, CLARION INN, CLARION COLLECTION, COMFORT INN, COMFORT HOTEL, COMFORT INN & SUITES, AND COMFORT HOTEL & SUITES, ECONOLODGE, MAINSTAY SUITES, RODEWAY INN, SLEEP INN, SLEEP INN & SUITES, QUALITY INN, QUALITY HOTEL, QUALITY INN & SUITES, QUALITY SUITES.

10) Hyatt  HYATT, HYATT REGENCY, GRAND HYATT and PARK HYATT.

11) LodgeWorks  HAWTHORN SUITES, SIERRA SUITES, SUMMERFIELD SUITES BY WYNDHAM