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International Scheduled Flights
| Origin | Destination | Carier |
| IAH | YYC Calgary AB, Canada CA | Aeromaritime |
| IAH | MEX Mexico City Distrito Federal, Mexico MX | Aeromexico |
| IAH | MTY Monterrey Nuevo Leon, Mexico MX | Aeromexico |
| IAH | YYZ Toronto, Canada CA | Air Canada |
| IAH | YYC Calgary AB, Canada CA | Air Canada |
| IAH | MBJ Montego Bay, Jamaica JM | American Airlines, Inc. |
| IAH | PVR Puerto Vallarta Jalisco, Mexico MX | American Airlines, Inc. |
| IAH | GDL Guadalajara Jalisco, Mexico MX | American Eagle Airlines,Inc |
| IAH | MEX Mexico City Distrito Federal, Mexico MX | Aviacsa Airlines |
| IAH | MTY Monterrey Nuevo Leon, Mexico MX | Aviacsa Airlines |
| IAH | LGW London England, United Kingdom GB | British Airways Plc |
| IAH | CDG Paris, France FR | Compagnie Nat'L Air France |
| IAH | ACA Acapulco Guerrero, Mexico MX | Continental Air Lines, Inc. |
| IAH | AMS Haarlemmermeer Near Amsterdam, Netherlands NL | Continental Air Lines, Inc. |
| IAH | AUA Oranjestad Aruba, Aruba AW | Continental Air Lines, Inc. |
| IAH | BJX Del Bajio, Mexico MX | Continental Air Lines, Inc. |
| IAH | BOG Bogota, Colombia CO | Continental Air Lines, Inc. |
| IAH | BON Kralendijk Bonaire Netherlands Antilles, Netherlands Antilles AN | Continental Air Lines, Inc. |
| IAH | BZE Belize City, Belize BZ | Continental Air Lines, Inc. |
| IAH | CCS Caracas, Venezuela VE | Continental Air Lines, Inc. |
| IAH | CDG Paris, France FR | Continental Air Lines, Inc. |
| IAH | CLO Cali, Colombia CO | Continental Air Lines, Inc. |
| IAH | CUN Cancun Quintana Roo, Mexico MX | Continental Air Lines, Inc. |
| IAH | CZM Cozumel Quintana Roo, Mexico MX | Continental Air Lines, Inc. |
| IAH | EZE Buenos Aires, Argentina AR | Continental Air Lines, Inc. |
| IAH | GDL Guadalajara Jalisco, Mexico MX | Continental Air Lines, Inc. |
| IAH | GIG Rio De Janeiro Rio De Janeiro, Brazil BR | Continental Air Lines, Inc. |
| IAH | GRU Sao Paulo Sao Paulo, Brazil BR | Continental Air Lines, Inc. |
| IAH | GUA Guatemala City Guatemala, Guatemala GT | Continental Air Lines, Inc. |
| IAH | GYE Guayaquil, Ecuador EC | Continental Air Lines, Inc. |
| IAH | LGW London England, United Kingdom GB | Continental Air Lines, Inc. |
| IAH | LIM Callao Lima Lima Metropolitan Area, Peru PE | Continental Air Lines, Inc. |
| IAH | LIR Liberia, Costa Rica CR | Continental Air Lines, Inc. |
| IAH | MBJ Montego Bay, Jamaica JM | Continental Air Lines, Inc. |
| IAH | MEX Mexico City Distrito Federal, Mexico MX | Continental Air Lines, Inc. |
| IAH | MGA Managua, Nicaragua NI | Continental Air Lines, Inc. |
| IAH | MID Merida Yucatan, Mexico MX | Continental Air Lines, Inc. |
| IAH | MTY Monterrey Nuevo Leon, Mexico MX | Continental Air Lines, Inc. |
| IAH | MZT Mazatlan Sinaloa, Mexico MX | Continental Air Lines, Inc. |
| IAH | NRT Tokyo, Japan JP | Continental Air Lines, Inc. |
| IAH | POS Port Of Spain Trinidad, Trinidad and Tobago TT | Continental Air Lines, Inc. |
| IAH | PTY Panama City, Panama PA | Continental Air Lines, Inc. |
| IAH | PVR Puerto Vallarta Jalisco, Mexico MX | Continental Air Lines, Inc. |
| IAH | RTB Roatan, Honduras HN | Continental Air Lines, Inc. |
| IAH | SAL San Salvador, El Salvador SV | Continental Air Lines, Inc. |
| IAH | SAP San Pedro Sula, Honduras HN | Continental Air Lines, Inc. |
| IAH | SJD Los Cabos Baja California Sur, Mexico MX | Continental Air Lines, Inc. |
| IAH | SJO San Jose, Costa Rica CR | Continental Air Lines, Inc. |
| IAH | TGU Tegucigalpa, Honduras HN | Continental Air Lines, Inc. |
| IAH | UIO Quito, Ecuador EC | Continental Air Lines, Inc. |
| IAH | YUL Montreal, Canada CA | Continental Air Lines, Inc. |
| IAH | YVR Vancouver BC, Canada CA | Continental Air Lines, Inc. |
| IAH | YYC Calgary AB, Canada CA | Continental Air Lines, Inc. |
| IAH | YYZ Toronto, Canada CA | Continental Air Lines, Inc. |
| IAH | ZIH Ixtapa-Zihuatanejo Guerrero, Mexico MX | Continental Air Lines, Inc. |
| IAH | ACA Acapulco Guerrero, Mexico MX | ExpressJet |
| IAH | AGU Aguascalientes Aguascalientes, Mexico MX | ExpressJet |
| IAH | BJX Del Bajio, Mexico MX | ExpressJet |
| IAH | CME Ciudad Del Carmen Campeche, Mexico MX | ExpressJet |
| IAH | CUU Chihuahua Chihuahua, Mexico MX | ExpressJet |
| IAH | DGO Durango Durango, Mexico MX | ExpressJet |
| IAH | GDL Guadalajara Jalisco, Mexico MX | ExpressJet |
| IAH | HUX Huatulco Oaxaca, Mexico MX | ExpressJet |
| IAH | LOV Monclova Coahuila, Mexico MX | ExpressJet |
| IAH | MEX Mexico City Distrito Federal, Mexico MX | ExpressJet |
| IAH | MLM Morelia Michoacan, Mexico MX | ExpressJet |
| IAH | MTY Monterrey Nuevo Leon, Mexico MX | ExpressJet |
| IAH | MZT Mazatlan Sinaloa, Mexico MX | ExpressJet |
| IAH | NAS Nassau, Bahamas BS | ExpressJet |
| IAH | OAX Oaxaca Oaxaca, Mexico MX | ExpressJet |
| IAH | PBC Puebla Puebla, Mexico MX | ExpressJet |
| IAH | PVR Puerto Vallarta Jalisco, Mexico MX | ExpressJet |
| IAH | QRO Queretaro Queretaro, Mexico MX | ExpressJet |
| IAH | SJD Los Cabos Baja California Sur, Mexico MX | ExpressJet |
| IAH | SLP San Luis Potosi San Luis Potosi, Mexico MX | ExpressJet |
| IAH | SLW Saltillo Coahuila, Mexico MX | ExpressJet |
| IAH | TAM Tampico Tamaulipas, Mexico MX | ExpressJet |
| IAH | TLC Toluca Estado De Mexico, Mexico MX | ExpressJet |
| IAH | TRC Torreon Coahuila, Mexico MX | ExpressJet |
| IAH | VSA Villahermosa Tabasco, Mexico MX | ExpressJet |
| IAH | YYZ Toronto, Canada CA | ExpressJet |
| IAH | ZIH Ixtapa-Zihuatanejo Guerrero, Mexico MX | ExpressJet |
| IAH | ZLO Manzanillo Colima, Mexico MX | ExpressJet |
| IAH | AMS Haarlemmermeer Near Amsterdam, Netherlands NL | Klm Royal Dutch Airlines |
| IAH | FRA Frankfurt Am Main, Germany DE | Lufthansa German Airlines |
| IAH | AMS Haarlemmermeer Near Amsterdam, Netherlands NL | Privatair |
| IAH | BZE Belize City, Belize BZ | Taca Int'L Airlines |
| IAH | RTB Roatan, Honduras HN | Taca Int'L Airlines |
International Charter Flights
| Origin | Destination | Carier |
| IAH | KEF Keflavik, Iceland IS | Aero-Services-Corporate |
| IAH | CUN Cancun Quintana Roo, Mexico MX | Aeromexico |
| IAH | CUN Cancun Quintana Roo, Mexico MX | Ryan International Airlines |
| IAH | LAD Luanda, Angola AO | World Airways, Inc. |
There is over 92 international flights from IAH airport.
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