Mammoth Lakes Secures Year-Round United Airlines Flights Between Bishop and San Francisco

Mammoth Lakes secures year-round United Airlines service between Bishop and San Francisco, expanding Eastern Sierra access as flights run seasonally four days weekly and daily in summer and winter.

Mammoth Lakes has secured year-round air service as United Airlines expands its Bishop-San Francisco route. The service links Eastern Sierra Regional Airport with San Francisco International Airport throughout the year. Previously seasonal, the route now operates four days a week in spring and fall, while summer and winter receive daily flights.

As a result, Mammoth Lakes, Bishop and surrounding Eastern Sierra communities gain more consistent access to a major US aviation gateway. The expansion follows collaboration between Mammoth Lakes Tourism and regional partners. Furthermore, winter travellers retain daily flights between Bishop and Denver, strengthening connectivity for residents, visitors and the wider regional tourism economy.

Mammoth Lakes Gains Year-Round United Airlines Service to San Francisco

Mammoth Lakes Tourism, together with regional partners across California’s Eastern Sierra, has confirmed that year-round air service between Eastern Sierra Regional Airport (BIH) in Bishop and San Francisco International Airport (SFO) is now operating.

United Airlines has shifted the route from a seasonal operation to a four-season service, creating a more consistent air connection between the Eastern Sierra and the San Francisco Bay Area. The development is expected to improve accessibility for both visitors travelling to the region and residents using air travel for wider domestic connections.

How will United Airlines operate the Bishop-San Francisco route?

United Airlines will operate flights between Bishop and San Francisco four days a week during spring and autumn. During the summer and winter seasons, the service will operate daily.

The change provides a more predictable year-round travel option for the Eastern Sierra. Flights are available for booking through United Airlines, giving travellers a direct route between BIH and SFO rather than relying solely on seasonal connectivity or longer surface journeys.

For Mammoth Lakes, the expanded service is particularly relevant because Bishop serves as a regional gateway for travellers heading into the Eastern Sierra and nearby mountain destinations.

Why does year-round air service matter to Mammoth Lakes?

The shift to year-round flights reflects a broader effort to strengthen transport connectivity across the Eastern Sierra. Mammoth Lakes Tourism has worked with local government, tourism and business organisations through the Eastern Sierra Air Alliance (ESAA) to support commercial aviation access.

The alliance includes Mammoth Lakes Tourism, the Town of Mammoth Lakes, Inyo County, Mammoth Mountain, the City of Bishop and the Bishop Chamber of Commerce.

Brian Wright, President and CEO of Mammoth Lakes Tourism, described the development as an investment in connections for both Eastern Sierra residents and visitors.

The partnership demonstrates how regional cooperation can support aviation access beyond traditional peak tourism periods.

What does passenger data reveal about BIH demand?

Data cited from the US Department of Transportation for 2025 indicates that visitors flying into the Eastern Sierra represented an estimated 66% of BIH passengers, while 31% were residents or local originating passengers. Another 3% were categorised as other travellers.

The same survey indicated that around 60% of passengers would fly more frequently if the airport had year-round service.

That finding provides context for the decision to extend the United Airlines route. Instead of serving only seasonal demand, the additional schedule is designed to respond to a wider mix of tourism and local travel requirements throughout the year.

What other United Airlines service is available from Bishop?

The expanded San Francisco service is complemented by winter connectivity between Bishop and Denver International Airport (DEN).

United Airlines continues to operate the Denver-Bishop route daily during the winter season. Together, the San Francisco and Denver services provide Eastern Sierra travellers with access to two significant US aviation hubs.

This connectivity can support visitors travelling for winter recreation, summer holidays, business, family trips and other purposes while providing local residents with additional options for onward journeys.

What does the expansion mean for Eastern Sierra tourism?

Year-round aviation can help reduce the dependence on seasonal travel patterns by providing more consistent access during spring and autumn, periods that traditionally sit between major summer and winter travel seasons.

For Mammoth Lakes and the wider Eastern Sierra, the service therefore has implications beyond visitor arrivals. Reliable connectivity can support tourism businesses, local employment, resident travel and regional economic activity.

The route’s continuation across all four seasons also gives travellers greater flexibility when planning trips to the destination, while providing the region with a more stable connection to the San Francisco market.

“The expansion of United Airlines’ service between Bishop and San Francisco represents an important development for Mammoth Lakes and the wider Eastern Sierra. Year-round connectivity can make the destination more accessible across different travel seasons while supporting both visitors and local communities. The cooperation between Mammoth Lakes Tourism, local authorities, tourism organisations and aviation stakeholders also demonstrates the importance of regional partnerships in strengthening destination access. With daily summer and winter flights and continued winter connectivity to Denver, travellers gain additional options for reaching this distinctive California region. This development highlights how consistent air connectivity can support tourism, business activity and the broader visitor economy while creating a stronger foundation for the Eastern Sierra’s long-term destination growth.” says Anup Kumar Keshan, Editor-in-Chief,. TTW.

Cause: Eastern Sierra communities and tourism organisations have worked collectively to strengthen commercial air connectivity and respond to passenger demand for year-round service. Answer: United Airlines has consequently moved the Bishop-San Francisco route from seasonal to year-round operation, with four weekly flights in spring and autumn and daily flights in summer and winter. Reason: 2025 US Department of Transportation data cited by Mammoth Lakes Tourism showed strong visitor demand at BIH, while about 60% of surveyed passengers said they would fly more frequently if service operated year-round. The expanded schedule therefore supports tourism, residents and broader regional connectivity across the Eastern Sierra throughout the year.

Mammoth Lakes and its Eastern Sierra partners have strengthened regional connectivity by securing year-round United Airlines service between Bishop and San Francisco. The expansion turns a previously seasonal route into a four-season connection, with four weekly flights during spring and autumn and daily operations through summer and winter. The change is significant for both visitors and residents because BIH serves as an important gateway to Mammoth Lakes and surrounding Eastern Sierra communities. Passenger data cited for 2025 also indicates substantial inbound visitor demand and interest in more frequent flying if year-round service is available.

Meanwhile, daily winter flights between Bishop and Denver continue to provide another major-airport connection. Together, these services give the Eastern Sierra a broader air network across key travel seasons. The development also demonstrates the role of regional collaboration, with tourism organisations, local authorities and businesses working collectively to sustain commercial aviation access and support the area’s long-term travel economy.