United Airlines’ Longest Nonstop Routes With The Boeing 737 MAX In Winter 2027

United Airlines continues to demonstrate how modern narrowbody aircraft can connect distant destinations without requiring larger, widebody aircraft. The Boeing 737 MAX plays an important role in this strategy, offering the range and efficiency needed for longer domestic and international services while allowing the airline to match capacity to demand across its extensive network. Several routes stand out for their distance and geographical variety. These services connect the continental US with Central America, the Caribbean, Alaska, and Hawaii, alongside long transcontinental flights between major cities. Of course, schedules and aircraft assignments can change before departure dates. However, these routes illustrate the possibilities of the Boeing 737 MAX within the Star Alliance carrier's winter network. Using the latest data for January 2027 from Cirium, an aviation analytics company, let's explore the distances involved, the markets served, and the operational significance of these nonstop connections. The Shortest Boeing 737 MAX Routes Operated by United Airlines Credit: Markus Mainka I Shutterstock Before looking at United Airlines' longest Boeing 737 MAX routes in January 2027, let's examine the shortest, some of which are under 200 miles (322 km) long. These routes demonstrate that the aircraft is not limited to long-distance domestic and international services. The route between San Francisco International Airport (SFO) and Reno-Tahoe International Airport (RNO), at 192 miles (309 km) long, illustrates how a modern narrowbody aircraft can serve relatively short sectors between important regional markets. These flights allow passengers to travel between cities without driving, while connecting services at major airports provide onward access to destinations across the US. Houston George Bush Intercontinental Airport (IAH) to San Antonio International Airport (SAT) covers just 191 miles (307 km), making it another notably short connection within United Airlines’ network. Ranking From To Distance 1 Houston (IAH) San Antonio (SAT) 191 miles 2 San Francisco (SFO) Reno (RNO) 192 miles 3 Newark (EWR) Boston (BOS) 200 miles 4 Los Angeles (LAX) Fresno (FAT) 209 miles 5 Newark (EWR) Washington, DC (IAD) 213 miles 7 Houston (IAH) Dallas/Fort Worth (DFW) 224 miles 8 Los Angeles (LAX) Las Vegas (LAS) 236 miles The service links two major Texan cities, catering to business travelers, leisure passengers, and people visiting friends and relatives. Other short routes include Fresno (FAT) to Los Angeles (LAX) at 209 miles (336 km) and Boston (BOS) to Newark (EWR) at 200 miles (322 km). United Airlines' shortest Boeing 737 MAX routes under 250 miles are outlined in the table above. Operating the Boeing 737 MAX on shorter sectors also requires airlines to consider turnaround times, passenger demand, and aircraft utilization. This ensures that the aircraft contributes effectively to the wider network rather than serving only its longest routes. Boston To San Francisco & San Francisco To Florida Credit: Kirk Fisher | Shutterstock Now let's head to the other end of the scale and take a look at some of United Airlines' longest Boeing 737 MAX routes. Boston Logan International Airport (BOS) to San Francisco International Airport (SFO) covers 2,704 miles (4,352 km), connecting two important commercial, educational, and technology centers. The route serves passengers traveling for business, university-related activities, family visits, and leisure, with both airports offering extensive onward connections. For United Airlines, the service also illustrates how the Boeing 737 MAX can support a long transcontinental journey without requiring a widebody aircraft on every departure. Transcontinental services require careful scheduling because aircraft spend several hours on each sector, and delays can affect subsequent rotations, but the Boeing 737 MAX's fuel efficiency and range make it a useful option for airlines balancing operating costs against passenger demand across busy domestic markets. San Francisco International Airport (SFO) to Miami International Airport (MIA) covers 2,585 miles (4,160 km), linking Northern California with South Florida. Miami serves as an important gateway for international travel, Latin American connections, cruise departures, and leisure trips, while San Francisco provides access to California's Bay Area and the wider West Coast. Los Angeles To Costa Rica & Hawaii Credit: The Global Guy I Shutterstock Los Angeles International Airport (LAX) to San José Juan Santamaría International Airport (SJO) covers 2,721 miles (4,379 km), offering a direct connection between Southern California and Costa Rica’s capital region. The service complements the longer San Francisco to San José route, illustrating how United Airlines can serve the same international destination from more than one major West Coast gateway. Travelers from the Los Angeles area can avoid traveling north to San Francisco or connecting through another hub. Los Angeles International Airport (LAX) to Liberia Guanacaste Airport (LIR) covers 2,627 miles (4,228 km), creating another nonstop link between Southern California and Costa Rica’s Pacific-facing resort region. The route's appeal is closely connected to leisure travel, particularly in the peak northern winter season, although visiting friends and relatives and other personal journeys also contribute to demand. Serving both Costa Rican destinations gives travelers a choice between the capital region and Guanacaste, which can have quite different implications for ground transportation and holiday planning. United's 737 MAX Aircraft Number In Fleet Number On Order Boeing 737 MAX 8 123 - Boeing 737 MAX 9 181 43 Boeing 737 MAX 10 - 167 The Boeing 737 MAX is widely seen as a popular replacement for the aging Boeing 737-800 aircraft. The latest data from ch-aviation shows that United Airlines currently operates a total of 304 Boeing 737 MAX aircraft, made up of the Boeing 737 MAX 8 and Boeing 737 MAX 9. The carrier also has orders for the Boeing 737 MAX 10, as outlined in the table above. Meanwhile, Los Angeles International Airport (LAX) to Lihue Airport (LIH) in Hawaii covers 2,615 miles (4,208 km), placing the Hawaiian service among the longer routes in United Airlines' Boeing 737 MAX network. Lihue provides access to Kauai's beaches, coastal scenery, and outdoor attractions, while Los Angeles offers extensive connections for passengers originating elsewhere in the US. Hawaii services also require airlines to consider additional operational factors, including fuel requirements, weather, and suitable diversion options, when assigning aircraft to longer overwater flights. Denver To San Juan & Punta Cana Credit: Ian Dewar Photography | Shutterstock Denver International Airport (DEN) is another major hub for United Airlines, and the carrier's service to San Juan Luis Muñoz Marín International Airport (SJU) in Puerto Rico spans 2,732 miles (4,397 km). The route links a major Rocky Mountain hub with a Caribbean destination that combines beaches, historic neighborhoods, and a strong tourism economy. San Juan also attracts travelers visiting friends and relatives, giving the route a customer base that extends beyond vacation traffic. Denver's central position within United Airlines’ network helps connect passengers from numerous inland cities to the Caribbean, while the Boeing 737 MAX offers a practical aircraft option for a flight of this length. Denver International Airport (DEN) to Punta Cana International Airport (PUJ) in the Dominican Republic covers 2,609 miles (4,198 km). Punta Cana is one of the Caribbean’s most prominent resort destinations, attracting travelers seeking to escape the cold. A nonstop connection can make the journey more convenient for passengers who would otherwise transfer at an eastern hub, particularly during busy holiday periods when demand for direct leisure services can be substantial. Houston To Georgetown & Chicago To Anchorage Credit: Markus Mainka | Shutterstock Houston George Bush Intercontinental Airport (IAH) to Georgetown Cheddi Jagan International Airport (GEO) in Guyana covers 2,901 miles (4,669 km). This connection links United Airlines’ major Texas hub with the South American country’s principal international gateway, supporting tourism, family visits, commerce, and travel associated with the country's expanding energy industry. The Houston connection also allows passengers from other US cities to reach Guyana with a single transfer. The Boeing 737 MAX is relevant on routes where demand supports nonstop service but does not necessarily justify a larger aircraft on every departure. Its operating economics allow airlines to consider markets that require considerable range while maintaining a narrower capacity profile than many long-haul widebodies. Georgetown’s location on South America’s northern Atlantic coast also makes the Houston connection geographically distinctive within United Airlines’ international network. During the summer months, United Airlines also deploys its Boeing 737 MAX across the Atlantic, to destinations including Glasgow (GLA) and Santiago de Compostela (SCQ). These routes would also be among the carrier's longest with the popular narrowbody aircraft from Boeing. Chicago O'Hare International Airport (ORD) to Ted Stevens Anchorage International Airport (ANC) covers 2,846 miles (4,580 km), connecting a major Midwestern hub with Alaska’s largest city. Anchorage serves as a gateway to the state’s outdoor destinations and supports travel associated with tourism, business, and visiting friends and relatives. San Francisco To Costa Rica Credit: Delia_Suvari | Shutterstock, Simple Flying United Airlines' longest Boeing 737 MAX routes both connect its hub at San Francisco International Airport (SFO) with Costa Rica. The carrier's San Francisco to Liberia route spans 2,946 miles (4,741 km). Liberia’s Guanacaste Airport (LIR) serves Costa Rica’s northwestern Guanacaste region, an area known for Pacific beaches, resort properties, and outdoor activities. The route offers a direct alternative to flying through San José, while the Boeing 737 MAX provides a practical option for serving a substantial leisure market without automatically requiring a widebody aircraft. United Airlines' longest Boeing 737 MAX routes in January 2027 are outlined in the table below. Ranking From To Distance 1 San Francisco (SFO) San Jose (SJO) 3,309 miles 2 San Francisco (SFO) Liberia (LIR) 2,946 miles 3 Houston (IAH) Georgetown (GEO) 2,901 miles 4 Chicago (ORD) Anchorage (ANC) 2,846 miles 5 Denver (DEN) San Juan (SJU) 2,732 miles 6 Los Angeles (LAX) San Jose (SJO) 2,721 miles 7 San Francisco (SFO) Boston (BOS) 2,704 miles 8 Los Angeles (LAX) Liberia (LIR) 2,627 miles San Francisco International Airport (SFO) to San José Juan Santamaría International Airport (SJO) in Costa Rica is the carrier's longest Boeing 737 MAX route in January 2027, covering 3,039 miles (4,890 km). The route connects Northern California with Costa Rica’s principal international gateway, serving travelers visiting the capital region, the Central Valley, and destinations further afield. By operating this eight-hour route with the Boeing 737 MAX, United Airlines demonstrates the aircraft's suitability for lengthy Central American services. A nonstop service removes the need for a connection through another US airport, making the route useful for leisure travelers, passengers visiting family, and people conducting business. San Francisco also provides onward connections across the US and to destinations in the Pacific region, increasing the usefulness of the Costa Rican service for connecting passengers.