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شرکت‌های هواپیمایی و مقصدهای پروازی > Historical airline service: opening of Intercontinental in 1969 to the early 1980s

At the time of the opening of IAH in 1969, domestic scheduled passenger airline service was being اجرا توسط امریکن ایرلاینز، Braniff International Airways، کنتیننتال ایرلاینز، دلتا ایرلاینز، Eastern Air Lines، National Airlines and Houston-based Texas International Airlines which had formerly operated as Trans-Texas Airways (TTa). International service at this time was being flown by خطوط هوایی سراسری آمریکا (خطوط هوایی سراسری آمریکا) with ten nonstop flights a week operated with بوئینگ ۷۰۷ jetliners to مکزیکو سیتی، کاال‌ام operating داگلاس دی‌سی-۸ jets four days a week to آمستردام via an intermediate stop in مونترآل، Braniff International with بوئینگ ۷۲۷ service several times a week to پاناماسیتی and آئرومکزیکو (now آئرومکزیکو) flying مک‌دانل داگلاس دی‌سی-۹ jets to مونتری، گوادالاخارا، خالیسکو، پورتو بایارتا، خالیسکو، آکاپولکو، گوئررو and مکزیکو سیتی several days a week. Texas International was also operating direct, no change of plane service to مکزیک at this time with مک‌دانل داگلاس دی‌سی-۹ jets to مونتری and Convair 600 turboprop flights to تامپیکو and وراکروس. KLM Royal Dutch introduced بوئینگ ۷۴۷ service in 1971 and by 1974 ایر فرانس was operating four nonstop بوئینگ ۷۴۷ flights a week to both پاریس and مکزیکو سیتی. Also in 1974, Continental, Pan Am, and National were operating مک‌دانل داگلاس دی‌سی-۱۰ wide body jetliners into IAH while Delta was flying لاکهید ال-۱۰۱۱ تری‌استار wide body jets with both types being operated on respective domestic routes from the airport by these airlines with National also operating بوئینگ ۷۴۷ service to Houston at this time once a week on a Miami-Houston-Los Angeles routing. By the late 1970s, Cayman Airways had begun nonstop service between گرند کیمن in the کارائیب and Intercontinental with stretched بریتیش ایرکرفت بی‌ای‌سی یک-یازده series 500 twin jets. Cayman Airways served the airport for many years, operating a variety of aircraft including بوئینگ ۷۲۷، بوئینگ ۷۳۷، بوئینگ ۷۳۷ کلاسیک، بوئینگ ۷۳۷ کلاسیک and داگلاس دی‌سی-۸ jetliners into IAH in addition to the BAC One-Eleven.
By July 1983, the number of domestic and international air carriers serving Intercontinental had grown substantially. American, Continental, Delta and Eastern had been joined by پیدمونت ایرلاینز، ساوت‌وست ایرلاینز،  TWA ، یونایتد ایرلاینز، یو اس ایرویز and Western Airlines. Western was operating daily مک‌دانل داگلاس دی‌سی-۱۰ wide body jet service nonstop to سالت‌لیک‌سیتی at this time with this flight also offering direct one stop service to انکوریج. International service was being اجرا توسط ایر کانادا، اویاتکا، British Caledonian Airways، کنتیننتال ایرلاینز، Eastern Air Lines، SAHSA، هواپیمایی آفریقای جنوبی، اویانکا السالوادور and VIASA in addition to Pan Am, KLM Royal Dutch, Air France, Aeroméxico and Cayman Airways. Several commuter and regional airlines were also operating passenger service at this time from IAH including Emerald Air (operating as Pan Am Express), Metro Airlines، Rio Airways and Royale Airlines. Metro Airlines was operating "cross-town" shuttle service with de Havilland Canada DHC-6 Twin Otter turboprops with up to seventeen round trip flights a day between IAH and the Clear Lake City STOLport located near the مرکز فضایی جانسون and also up to nine round trip flights a day between the airport and ناحیه‌ای شوگرلند as well as other flights to regional destinations in Texas and Louisiana. In addition, at this same time the airport had scheduled helicopter airline service اجرا توسط Executive Helicopters with بل ۲۰۶L "Long Ranger" helicopters to four Houston-area بالگردگاه with up to 36 round trip flights a day.
Other airlines that served Houston Intercontinental were Aviacsa، America West Airlines، Atlantic Southeast Airlines، کنیدین ایرلاینز، چاینا ایرلاینز، Comair, Grand Airways, گلف ایر، Martinair، نورت‌وست ایرلاینز، هواپیمایی بین‌المللی پاکستان، PrivatAir operating on behalf of کاال‌ام and later هواپیمایی اسکاندیناوی، الملکیه الاردنیه (then called ALIA), SeaPort Airlines، هواپیمایی آفریقای جنوبی، ساوت‌وست ایرلاینز, UltrAir and World Airways.