Big Sky Field (S85) | Private Jet Hub Near Culbertson

Current Conditions at KS85

Big Sky Field, Culbertson, MT

Airport Overview

The Culbertson, MT region is served by Big Sky Field (KS85), a public-use airport at 1,954 feet elevation. The field maintains 1 runway(s), with the longest measuring 3,800 feet on N/A surface. Operators and private travelers use Big Sky Field for its direct ramp access and minimal ground delays. For official FAA airport data, visit the FAA Airport Data portal or AirNav KS85.

Private Aviation Briefing

Located near Culbertson, Big Sky Field (KS85) sits at 1,954 ft MSL above sea level. Below is the operational context for private jet and charter operations from this airport.

U.S. General Aviation Context

Big Sky Field is part of the U.S. National Airspace System, regulated by the FAA. As a MT facility, the airport contributes to the regional transportation network connecting Culbertson to the broader aviation system. FAA Part 135 charter operators serve this airport, and The Jet Finder can source aircraft positioned near KS85 for on-demand charter.

Runway Capability

At 3800 feet, Big Sky Field serves light jets and turboprops. The Citation CJ series, Phenom 100, HondaJet, and King Air family operate within this runway capability. Midsize jets require careful performance analysis based on temperature and aircraft weight. Pilots should reference aircraft-specific takeoff and landing distance charts for KS85's runway length and 1,954 ft MSL elevation.

Charter Considerations

Charter availability from Big Sky Field depends on aircraft positioning. Airports with higher business aviation traffic generally have more aircraft based locally, reducing repositioning costs. The Jet Finder sources aircraft from the nearest available operators, comparing positioning fees, hourly rates, and aircraft quality to find the best option for your specific mission from KS85.

What to Know Before You Fly

Pets fly in-cabin on private charter from Big Sky Field. No cargo hold, no carrier requirements, no breed restrictions. Dogs, cats, and other animals sit with you in the cabin. Inform The Jet Finder of pet travel when booking so we can confirm the operator's pet policy and cabin configuration for your flight from KS85.

Safety & Planning

Aircraft operating from Big Sky Field file IFR flight plans regardless of weather. Instrument flight rules provide ATC separation, radar monitoring, and structured routing. Even in clear weather, IFR operations from KS85 provide an additional layer of safety. Charter operators flying under Part 135 are required to operate under IFR for most passenger flights.

Airport Selection Strategy

For travelers based near Culbertson, Big Sky Field may not be the only private aviation option. Comparing nearby airports on runway length, FBO services, fuel pricing, and drive time from your origin can reveal better options. The Jet Finder evaluates all airports within a reasonable radius of your departure point to find the best combination of cost and convenience.

Seasonal Factors

Winter operations at Big Sky Field may involve de-icing procedures that add 15 to 30 minutes to departure times. De-icing fluid costs $500 to $3,000 depending on aircraft size and icing conditions. These costs pass through to the charter client. Morning departures during winter often avoid the worst icing conditions at KS85.

Location & Address

Big Sky Field occupies coordinates 48.1533° N, -104.5040° W at 1,954 feet above sea level. FBO-arranged car service or rideshare connects passengers from Big Sky Field to Culbertson and surrounding areas efficiently.

Runways & Facilities

Big Sky Field's 3,800-foot runway accommodates turboprops, very light jets, and most light jet categories (Citation CJ series, Phenom 100/300, Premier I). Some midsize jets can operate under light-load conditions. Pilots should calculate performance based on temperature, elevation, and aircraft weight.

FBOs & Ground Services

FBO services at KS85 cover the standard general aviation needs: fuel, parking, and ground handling. Service levels vary by facility size and staffing. Pilots and passengers should coordinate arrival requirements in advance, particularly for after-hours operations at Big Sky Field.

Charter a Jet from Big Sky Field

Charter operations from Big Sky Field (KS85) connect Culbertson to destinations across the country. The Jet Finder sources aircraft from a nationwide network of FAA Part 135 operators, matching runway capabilities at KS85 with the right aircraft for your route.

Fly Private from KS85

The Jet Finder coordinates charter flights from Big Sky Field. Tell us your destination, dates, and passenger count. We source aircraft from FAA Part 135 operators matched to KS85's runway and facilities.

Airport Specifications

Airport Identity
Airport Name	Big Sky Field
ICAO Code	KS85
IATA Code	S85
FAA Identifier	S85
Address	Culbertson, MT
Elevation	1,954 ft MSL
Coordinates	48.1533° N, 104.5040° W
FAA Data	AirNav S85

Operations & Facilities
Runways	08/26: 3,800 ft (ASP)
FBOs	Airport Services
Customs	Not available
Fuel	Contact airport for availability
Hours	Contact airport for hours
Approaches	Contact airport for approach information
Tower / Freq	See Airport/Facility Directory

Regional Aviation Context

Montana's vast distances and sparse population make aviation practical transportation, not a luxury. Mountain flying conditions, high-density altitude, and unpredictable weather are standard.

Operational Considerations

Big Sky Field's 1,954-foot field elevation keeps density altitude effects manageable. Even on warm days, density altitude here tops out around 3,754 feet — within normal performance parameters for most aircraft. The 3,800-foot runway provides approximately 3,577 feet of effective sea-level performance.

Four distinct seasons define operations at Big Sky Field. Winter brings icing potential, snow-covered surfaces, and reduced daylight hours. De-icing capability is valuable from November through March. Spring and fall transitions produce the most variable weather — warm fronts, cold fronts, and rapid ceiling changes. Summer typically delivers the best VFR conditions but introduces convective risk during afternoon heating. Preflight weather assessment should include both surface observations and area forecasts at this latitude.

Nearby Airports

Airports within 150 nautical miles of Big Sky Field. Useful for alternate planning, repositioning, or comparing FBO options.

Poplar Muni Airport

KPO1 · 27 NM from KS85

Sidney - Richland Regional Airport

KSDY · 30 NM from KS85

Williston Basin International Airport

KXWA · 31 NM from KS85

Sher-Wood Airport

KPWD · 38 NM from KS85

Frequently Asked Questions

The ICAO identifier for Big Sky Field is KS85. The FAA designator is also KS85. Use this code when filing flight plans and referencing the airport in official communications.

Big Sky Field is situated in Culbertson, MT, at coordinates 48.1533° N, 104.5040° W. Field elevation is 1,954 feet above mean sea level.

Runway 08/26 is the main strip at Big Sky Field, providing 3,800 feet of ASP runway. The airport has 1 total runway(s).

Yes, Big Sky Field accepts private aviation traffic. With 3,800 feet of available runway, light jets and many midsize jets can operate here under standard conditions. Consult aircraft performance charts for heavier categories.

Ground services at KS85 are provided by the on-field operator. Available services may include aircraft parking, tiedowns, fuel, and basic passenger amenities. Confirm availability before arrival.

Field elevation at KS85: 1,954 feet above mean sea level. This figure appears in the Airport/Facility Directory and should be used for all performance computations at Big Sky Field.

Instrument approach availability at Big Sky Field depends on the facility's current FAA designation. Check the Terminal Procedures Publication or ForeFlight/Garmin Pilot for published approaches at KS85.

Private charter from KS85 is available through The Jet Finder. We connect clients with FAA-certificated Part 135 operators. Pricing depends on aircraft type, destination, and scheduling.

Big Sky Field's 3,800-foot primary runway accommodates most general aviation traffic. Turboprops and light jets are the largest categories that operate routinely. Jet operations beyond light category should be verified against performance requirements.

Big Sky Field's tower status and radio frequencies are published in the Airport/Facility Directory. AirNav (airnav.com/airport/KS85) also lists current frequency assignments.

Fuel types and pricing at Big Sky Field are subject to change. Contact the airport or its FBO for current Jet-A and 100LL availability. AirNav lists recent fuel prices reported by pilots.

International operations from Big Sky Field require U.S. Customs and Border Protection clearance. Some airports arrange CBP on-call or by appointment. Contact KS85 and The Jet Finder for international flight planning.

Check aviationweather.gov for current conditions at KS85. Big Sky Field's weather is influenced by MT's regional climate. Seasonal fog, wind, and precipitation patterns should be factored into flight planning.

Transit from Big Sky Field to Culbertson proper is typically a short ground drive. The exact distance depends on your destination within the Culbertson area. Private aviation eliminates the hour+ that commercial airport processing adds to your trip.

Aircraft parking at Big Sky Field (KS85) typically includes tiedown space and may include hangar availability. Rates vary by facility. Contact the FBO or airport manager for current parking options.

For a flight quote from Big Sky Field (KS85), contact The Jet Finder at thejetfinder.com/contact.html. Include your destination, dates, passenger count, and any special requirements. We respond with operator options and pricing.

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Big Sky Field (KS85)