Airports in Butte County, Idaho: Private, Municipal, Regional(All)

Airports Serving Butte County, Idaho

Butte County is one of Idaho's most sparsely populated counties, with roughly 2,600 residents occupying 2,234 square miles of high desert and mountain terrain in central-eastern Idaho. The county seat of Arco—famous as the first city in the world to be lit by nuclear power in 1955—sits at 5,318 feet elevation where the Big Lost River emerges from the mountain canyons onto the Snake River Plain. The county's vast area encompasses portions of the Idaho National Laboratory (INL) site, the Lost River Range including Idaho's highest peak (Mount Borah at 12,668 feet), and the Craters of the Moon National Monument and Preserve. Despite its enormous geographic footprint, Butte County has no commercial air service, and residents must travel to Idaho Falls or Pocatello for scheduled flights.

Arco-Butte County Airport (AOC) — High Desert General Aviation

Arco-Butte County Airport provides the county's general aviation access point, located adjacent to the town of Arco at an elevation of 5,330 feet. The airport features a 5,600-foot paved runway oriented 02/20, one of the longer GA runways in rural Idaho—a legacy of the area's military and nuclear research history. The generous runway length can accommodate medium-size business jets and turboprops, making the airport an important access point for INL contractors and government officials visiting the laboratory complex. Pilots should plan for high density altitude conditions, particularly during summer when afternoon temperatures combined with the 5,330-foot field elevation can push density altitudes above 8,000 feet. The surrounding terrain is largely flat sagebrush steppe to the south and east, but the dramatic Lost River Range rises abruptly to over 12,000 feet immediately west and north of the airport.

Idaho Falls Regional Airport (IDA) — Primary Commercial Option

Idaho Falls Regional Airport is the nearest commercial airport, located approximately 65 miles east of Arco via US-20 and US-26. The drive takes roughly 1 hour and 10 minutes across the Snake River Plain, passing through the northern edge of the INL site. IDA provides SkyWest Airlines regional jet service to Salt Lake City and Denver under the Delta Connection and United Express brands, plus seasonal Allegiant Air leisure routes to Phoenix-Mesa, Los Angeles, and Oakland. The route to Idaho Falls is straightforward on well-maintained two-lane highways, though winter conditions can include high winds, blowing snow, and occasional black ice on the exposed desert plain. Butte County's INL-connected residents make this drive frequently for both business and personal travel.

Pocatello Regional Airport (PIH) — Southern Alternative

Pocatello Regional Airport sits approximately 80 miles southeast of Arco via US-20, US-26, and I-15, roughly a 1 hour and 20 minute drive. PIH provides SkyWest Airlines service to Salt Lake City with Essential Air Service designation maintaining minimum commercial service levels. While IDA is typically closer and offers more destinations, PIH provides an alternative when routing through Salt Lake City is optimal. The drive passes through the agricultural communities of the Snake River Plain before joining I-15 south into Pocatello. For residents in the southern portions of Butte County, PIH may be roughly equidistant with IDA.

Craters of the Moon and Tourism Aviation

Butte County's Craters of the Moon National Monument and Preserve attracts over 250,000 visitors annually, and the nearby Lost River Range draws mountaineers attempting Idaho's highest peak, Mount Borah. While most visitors arrive by car, the tourism economy benefits indirectly from commercial air service at IDA and the availability of charter flights into Arco-Butte County Airport. The airport's proximity to both Craters of the Moon and the Lost River Range trailheads makes it a practical arrival point for private pilots seeking outdoor recreation in one of Idaho's most geologically dramatic landscapes. Scenic flights over the volcanic lava fields of Craters of the Moon offer a perspective impossible to achieve from ground level.

Idaho National Laboratory and Restricted Airspace

The Idaho National Laboratory's 890-square-mile site occupies a substantial portion of Butte County's eastern landscape, creating one of the largest restricted airspace complexes in the intermountain West. The INL restricted areas, designated R-6501 and associated zones on aeronautical sectional charts, prohibit unauthorized aircraft from overflying the nuclear research facilities at any altitude when active. General aviation pilots transiting Butte County must plan routes around these zones, which can add meaningful distance and time to cross-country flights through the region. The restricted airspace is typically active during business hours on weekdays but may be released during evenings, weekends, and holidays—pilots can check status by contacting Salt Lake Center or monitoring relevant frequencies. Despite these airspace constraints, the presence of INL has historically benefited Butte County's aviation infrastructure by driving federal investment in the Arco airport and surrounding transportation networks that serve the laboratory's operational needs.

Mount Borah and Mountaineering Access

Mount Borah, Idaho's highest peak at 12,668 feet, draws mountaineers and peak baggers to Butte County from across the country. The standard climbing route via the southwest ridge is a challenging non-technical scramble that requires careful preparation for high altitude, exposed terrain, and rapidly changing mountain weather. Climbers typically fly into Idaho Falls Regional Airport and drive approximately 90 miles northwest to the trailhead near Mackay, passing through Arco along the way. The mountain's difficulty and remoteness occasionally require search and rescue operations involving helicopter support, coordinated through the Custer County Sheriff's office (the peak technically straddles the Butte-Custer county line) and Idaho Mountain Search and Rescue. The peak's dramatic setting in the Lost River Range—with the 1983 Borah Peak earthquake fault scarp visible at the mountain's base—provides a geological and mountaineering destination unlike any other in the state.

Butte County's aviation needs are shaped by its unique combination of extreme remoteness, federal research infrastructure, and nationally significant natural attractions. The Arco-Butte County Airport's surprisingly capable runway reflects the community's historical connection to nuclear research and military operations, while the county's dependence on Idaho Falls and Pocatello for commercial service underscores the vast distances that define life in central Idaho's high desert. Travelers should account for the exposed and windswept nature of the highways connecting Butte County to commercial airports, particularly during winter months when ground blizzards can reduce visibility to near zero on the open Snake River Plain.

For visitors interested in Butte County's unique attractions—the volcanic landscapes of Craters of the Moon, the challenge of summiting Mount Borah on the tallest peak in Idaho, or the historical significance of Arco as the first nuclear-powered city—the most practical approach involves flying into Idaho Falls Regional Airport and planning ground transportation from there. The 85-mile drive from IDA to the Craters of the Moon visitor center takes about 1.5 hours on well-maintained highway through high desert terrain. The Borah Peak trailhead in the Lost River Range is approximately 50 miles north of Arco on a paved road with the final miles on well-graded gravel. These distances and road conditions make rental car the preferred ground transportation option for Butte County visitors, as taxi, ride-share, and public transit services are essentially nonexistent in this lightly populated desert county.