Top 10 Longest United Airlines Routes from Houston for January 2025

United Airlines continues to strengthen its presence in the U.S. aviation market by connecting travelers on some of the longest domestic routes. From Houston George Bush Intercontinental Airport (IAH), United operates flights that span thousands of miles, offering passengers reliable connections to cities nationwide.

Among its networks, Cirium has identified the ten longest domestic routes United Airlines serves from Houston. These routes offer extensive travel options, reflecting its dominance at one of the busiest airports in the United States.

The tenth-longest route, at 1,530 miles, connects Houston to Reno-Tahoe International Airport (RNO). This seasonal service faces no direct competition, although other airlines provide one-stop alternatives. Reno is Nevada’s second-busiest airport, handling over four million passengers annually.

The ninth route on the list spans 1,597 miles, linking Houston to Boston Logan International Airport (BOS). United operates up to three flights daily, utilizing its fleet of Boeing 737s. This route competes with JetBlue, which uses Airbus A220-300 aircraft.

The eighth-longest route connects Houston to San Jose International Airport (SJC), covering 1,608 miles. United holds an exclusive position on this route, though Southwest Airlines connects Houston Hobby Airport to San Jose.

Houston to Sacramento International Airport (SMF) ranks seventh at 1,609 miles. United operates two daily flights and faces competition from Southwest Airlines’ services out of Houston Hobby.

At 1,635 miles, United’s sixth-longest route connects Houston to its hub at San Francisco International Airport (SFO). United offers up to seven daily flights here, providing seamless connections to key transpacific destinations, including Seoul and Singapore.

The fifth-longest route is Houston to Portland International Airport (PDX), stretching 1,825 miles. United Airlines operates the route exclusively until May 2025, when Alaska Airlines launches direct flights.

Houston to Seattle-Tacoma International Airport (SEA) ranks fourth, at 1,874 miles. United operates two daily flights with its Boeing 737s, competing with Alaska Airlines on this route.

The third-longest route, spanning 2,007 miles, connects Houston to San Juan, Puerto Rico (SJU). United uses a mix of Boeing 767-300ERs and 737 MAX 9s on this route, which also sees competition from Spirit Airlines.

At 2,070 miles, the second-longest route links Houston to Cyril E. King Airport (STT) in St. Thomas. This winter-only service is operated weekly with United’s Boeing 737 MAX 8 aircraft.

Finally, the longest domestic route United operates from Houston is to Honolulu Daniel K. Inouye International Airport (HNL), a distance of 3,904 miles. United deploys Boeing 777-200ERs on this route, offering passengers a premium experience. American Airlines operates the only other direct Texas-Honolulu route from Dallas/Fort Worth (DFW).

United’s extensive operations reflect its strategic focus on connecting Houston to key destinations, reinforcing its role as a leader in long-haul travel.

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