A PLUS RESIDENCE 3* ACRA HOTEL 4* AGAN HOTEL 3* AKGUN ISTANBUL HOTEL 5* ALA SOFIA HOTEL 3* ALBATROS PREMIER HOTEL 4* ALDEM HOTEL 2* ALFA HOTEL 4* ALMINA HOTEL & SPA 4* ALMINA INN HOTEL 4* ALPINN HOTEL 4* ALPINN HOTEL DUE 4* ALZER HOTEL 4* AMBER HOTEL 4* AMIRAL PALACE 4* ANADOLU HOTEL 4* ANTEA HOTEL 4* ANTEA PALACE HOTEL SPA 4* ANTIK HOTEL 4* ANTUSA DESIGN HOTEL & SPA 4* ANTUSA PALACE HOTEL & SPA 4* APRILIS GOLD HOTEL 4* APRILIS HOTEL 4* ARDEN CITY HOTEL 4* AREN SUITES 4* ARMAGRANDI SPINA HOTEL 4* ART CITY HOTEL 3* ARUNA HOTEL SULTANAHMET 4* ASITANE LIFE HOTEL 3* ASKOC HOTEL 4* ATIK PALACE HOTEL 3* ATLANTIS ROYAL HOTEL 3* AVICENNA HOTEL 4* BALPETEK HOTEL 3* BARIN HOTEL 3* BASILEUS HOTEL 3* BEETHOVEN HOTEL & SUIT 3* BEETHOVEN HOTEL ISTANBUL 4* BEETHOVEN HOTEL PREMIUM 4* BEETHOVEN HOTEL SENFONI 4* BEKDAS HOTEL DELUXE 4* BENLER HOTEL LALELI 3* BERCE HOTEL 3* BEST WESTERN EMPIRE PALACE 4* BEYAZIT PALACE HOTEL 4* BISETUN HOTEL 3* BLACK TULIP HOTEL 4* BLUE ISTANBUL HOTEL 3* BLUE ISTANBUL HOTEL TAKSIM 3* BLUE MARMARAY HOTEL LALELI 3* BON HOTEL OLD CITY (EX BON DESIGN & SUITE) 3* BOUTIQUE SAINT SOPHIA ISTANBUL 5* BUDO HOTEL 3* CARLTON HOTEL 4* CARVAN HOTEL 3* CATCH HOTEL SULTANAHMET 5* CELAL SULTAN HOTEL 4* CEVAHIR HOTEL ISTANBUL ASIA 5* CHER HOTEL ISTANBUL 5* CIP HOTEL ISTANBUL BAKIRKOY 4* CITY CENTER HOTEL TAKSIM 4* CLARION HOTEL GOLDEN HORN 4* CLARION HOTEL MAHMUTBEY 5* COMFORT LIFE HOTEL 4* CONRAD ISTANBUL BOSPHORUS 5* CONSTANTINOPOLIS HOTEL 3* CROWNE PLAZA ISTANBUL FLORYA 5* CVK PARK BOSPHORUS HOTEL ISTANBUL 5* DALAN HOTEL 3* DANIS HOTEL ISTANBUL 4* DARA HOTEL 3* DARKHILL HOTEL 4* DARKMEN HOTEL 3* DE MAREE HOTEL 3* DEDEMAN ISTANBUL 5* DELTA HOTEL ISTANBUL 4* DELUXE GOLDEN HORN HOTEL 4* DELUXE NEWPORT HOTEL 3* DEMPA HOTEL 3* DIAMOND ROYAL HOTEL 4* DIVAN ISTANBUL 5* DIVAN ISTANBUL CITY GAYRETTEPE 4* DIVANI ALI HOTEL 4* DIVAS HOTEL 3* DOSSO DOSSI DOWNTOWN & SPA 5* DOSSO DOSSI GOLDEN HORN 4* DOSSO DOSSI LALELI 4* DOSSO DOSSI OLD CITY - SULTANAHMET 4* DOSSO DOSSI YENIKAPI 4* DUNDAR HOTEL 3* EA EXCLUSIVE HOTEL Boutique EDITION OLD CITY HOTEL 4* EMIRHAN INN APARTMENT 3* ENDERUN HOTEL 4* ENDICAN BEYAZIT 4* ENDICAN SULTANAHMET 4* ERBOY HOTEL 4* EURO PLAZA HOTEL 4* EVSEN HOTEL (ADULT ONLY) 3* FEHMI BEY HOTEL 3* FER HOTEL 5* FORS HOTEL 3* FOUR POINTS BY SHERATON ISTANBUL 5* FOUR-G HOTEL 3* GALATOWER HOTEL 3* GARDEN HOUSE HOTEL (ex ROSE GARDEN SUITES) Boutique GEDIK PASA KONAGI 3* GLORIOUS HOTEL ISTANBUL 4* GOLDEN AGE HOTEL 4* GOLDEN CITY HOTEL 4* GOLDEN HORN SIRKECI 4* GOLDEN ROYAL HOTEL 4* GRAND DURMAZ HOTEL 4* GRAND EMIR HOTEL 3* GRAND HALIC HOTEL 4* GRAND LIZA HOTEL 3* GRAND MARCELLO HOTEL 4* GRAND MARK HOTEL 3* GRAND PAMIR HOTEL 4* GRAND SIRKECI HOTEL 4* GRAND WASHINGTON HOTEL 4* GRAND YAVUZ HOTEL 4* GRAZIELLA GOLD HOTEL S-class GREAT FORTUNE DESIGN 4* GREEN ANKA HOTEL 3* HALI HOTEL 3* HENNA HOTEL Boutique HHK DOWTOWN HOTEL 4* HILTON ISTANBUL BAKIRKOY 5* HILTON ISTANBUL BOMONTI HOTEL & CONFERENCE CENTER 5* HILTON ISTANBUL BOSPHORUS 5* HOTEL ARINNA 3*+ HOTEL EYFEL 3*+ HOTEL MOSAIC 4* HOTEL SABA ISTANBUL 3* HOTELLINO ISTANBUL 4* IKBAL DELUXE HOTEL 4* IMAGINE HOTEL 4* INNOVA SULTANAHMET 4* IPEK PALAS HOTEL 4* ISTANBUL HAMIT HOTEL LALELI 3* ISTANBUL HOLIDAY HOTEL 3* JAFF HOTELS NISANTASI 4* JOYWAY HOTEL 4* JW MARRIOTT ISTANBUL MARMARA SEA 5* KALYON HOTEL ISTANBUL 4* KAYA MADRID HOTEL 3* KLAS HOTEL 4* KONAK HOTEL TAKSIM 4* LADY DIANA HOTEL 4* LE PETIT PALACE HOTEL 4* LEGACY OTTOMAN HOTEL 5* LEMON RESIDENCE 3* LENUS HOTEL 3* LEVNI HOTEL & SPA 5* LIKA HOTEL 2* MARMARAY HOTEL YENIKAPI 4* MARTINENZ HOTEL 3* MAY HOTEL 3* MEGARON HOTEL 3* MERCURE ISTANBUL SIRKECI 4* METROPOLITAN HOTELS BOSPHORUS 5* MIDTOWN HOTEL 4* MIKLAGORD HOTEL 3* MILANO HOTEL & SPA 4* MOVENPICK HOTEL ISTANBUL GOLDEN HORN 5* MUKARNAS PERA HOTEL 4* MUKARNAS TAKSIM HOTEL 4* MY DREAM HOTEL 5* NAUMPASA KONAGI HOTEL 4* NEW EMIN HOTEL 4* NIDYA HOTEL GALATAPORT 4* NOVA PLAZA BOUTIQUE & SPA 4* NOVA PLAZA CRYSTAL HOTEL 4* NOVA PLAZA ORION HOTEL 4* NOVA PLAZA PARK TAKSIM 4* NOVA PLAZA PERA 4* NOVA PLAZA PRIME HOTEL 5* NOVA PLAZA TAKSIM SQUARE 4* ORAN HOTEL 4* ORIENT EXPRESS HOTEL & SPA BY ORKA HOTELS 4* ORIENT MINTUR HOTEL 3* ORIENTBANK HOTEL AUTOGRAPH COLLECTION 4* ORKA ROYAL HOTEL 4* ORKA TAKSIM SUITES & HOTEL 4* PALDE HOTEL 4* PELL PALACE HOTEL & SPA S-class PERA ARYA HOTEL 3* PORT BOSPHORUS HOTEL 4* PREMIST HOTELS SULTANAHMET 4* PREMIST HOTELS TAKSIM 4* RADISSON BLU ISTANBUL PERA 5* RADISSON HOTEL ISTANBUL SULTANAHMET 3* RADISSON HOTEL PRESIDENT BEYAZIT ISTANBUL 4* RAMADA BY WYNDHAM ISTANBUL PERA 5* RAMADA ISTANBUL TAKSIM 4* RAMADA PLAZA BY WYNDHAM ISTANBUL SULTANAHMET 5* RECITAL HOTEL 3* RENZO HOTEL (ex ISTANBUL BLUE HOTEL BEYAZIT) 3* RETAJ ROYALE ISTANBUL 5* REYDEL HOTEL 3* RIA SUITES BOUTIQUE 4* RING STONE HOTEL BOSPHORUS 4* RIXOS PERA 5* RIXOS TERSANE ISTANBUL 5* ROOT KARAKOY HOTEL 4* ROYAL GALATA HOTEL 4* ROYAN HAGIA SOPHIA RADISSON INDIVIDUALS 5* SABIHA SULTAN HOTEL Boutique SANTA SOPHIA HOTEL 3* SARNIC HOTEL 4* SARNIC PREMIER HOTEL 4* SED HOTEL BOSPHORUS 3* SEMINAL HOTEL 4* SENATUS HOTEL 3* SENYOR GARDEN HOTEL 3* SERES OLD CITY HOTEL 3* SEVEN DAYS HOTEL 3* SEVEN HILLS HOTEL 4* SEVEN HILLS PALACE HOTEL 4* SIM HOTEL 3* SINEM HOTEL 4* SIRKECI MANSION 4* SOGUT HOTEL & SPA 4* SOKULLU PASA HOTEL 4* STONE HOTEL ISTANBUL 3* SULTAN HAMIT HOTEL 3* SULTAN HOUSE HOTEL 4* SULTANAHMET CESME HOTEL 3* SULTANIA HOTEL 5* SUMENGEN HOTEL 4* SUN COMFORT HOTEL 3* SUR HOTEL 3* SUREYYA HOTEL 3* TAXIM EXPRESS HOTEL 4* TAXIM HILL HOTEL 4* TAXIM LOUNGE HOTEL 4* TAXIM TOWN HOTEL 4* TAYHAN HOTEL 3* TEMPO FAIR SUITES 3* TEMPO HOTEL 4 LEVENT 3* TEMPO HOTEL CAGLAYAN 3* TEMPO SUITES AIRPORT 3* THE BYZANTIUM HOTEL 4* THE CRATON HOTEL 5* THE GALATA ISTANBUL HOTEL MGALLERY BY SOFITEL 5* THE LAILA HOTEL 3* THE LOLA HOTEL 3* THE MARMARA PERA 5* THE MARMARA SISLI 4* THE MERETTO HOTEL ISTANBUL 4* THE MILLION STONE HOTEL 4* THE PERAPORT HOTEL 3* THE REINA HOTEL 3* THE RITZ-CARLTON ISTANBUL 5* THE TIME ISTANBUL HOTEL 4* THEODIAN HOTEL 3* TREND HOTEL 4* TRIA ELEGANCE ISTANBUL 3* TRIA HOTEL 4* TURVAN HOTEL 3* VICTORY HOTEL & SPA 4* VIZYON CITY 3* VOGUE HOTEL SUPREME ISTANBUL 5* WALTON HOTEL NISANTASI RESIDENCE 3* WALTON HOTELS GALATA 4* WALTON RESIDANCE SISLI 4* WYNDHAM ISTANBUL OLD CITY 5* YASMAK SULTAN HOTEL 4* YIGITALP HOTEL 4* YILSAM SULTANAHMET HOTEL 4* YUSUF PASA KONAGI HOTEL 4* ZAGREB HOTEL 4* ZANADU ISTANBUL 3* ZEYNEP SULTAN HOTEL 3* ZURICH HOTEL 4*