Airports / Montana / RPX
Roundup Airport.
Roundup, Montana · 3,500 ft elevation. 1 charter operator based here.
KRPX
IATA RPX
1
Operators based
3,500
Elevation ft
Based operators
Field elevation
Nearest alternate
Field standing
40 nm
To the nearest alternate
Billings Logan International Airport (BIL).
Overview
Roundup Airport, listed as KRPX / RPX, is a general aviation field in Roundup, Montana. Field elevation is 3,500 feet above sea level. Free of scheduled airline operations, it serves business aviation, charter flights, and local general aviation.
For charter flyers, RPX is a home base: Bull Mountain Aviation LLC operates from the field. The closest alternate fields are Billings Logan International Airport (BIL, 40 nm), Lewistown Municipal Airport (LWT, 51 nm), and Mission Field (LVM, 92 nm). The field has 2 runways, the longest 5,098-foot paved runway, long enough for charter aircraft up to super-midsize jets.
Trip costs from RPX are driven by the aircraft category flown and how far it must reposition. Browse operators flying from the area or estimate a trip cost from RPX to plan your flight.
Run an FBO at KRPX? Become the preferred FBO
Field capability
ICAO
KRPX
IATA
RPX
FAA / Local
RPX
Elevation
3,500 ft
Coordinates
46.4751° N · 108.5415° W
Airspace
G · GolfClass G, GolfUncontrolled field, no tower. Pilots self-announce and sequence themselves on the common traffic advisory frequency.Source: FAA NASR class airspace
Size
Small
Scheduled svc
No
Elevation vs MT fields
state range 1,985–6,649 ft
At 3,500 ft, RPX sits lower than 48% of the 31 Montana fields on the register.
Runways & aircraft access
2 runways
longest 5,098 ft
- 07/255,098 ft × 75 ftAsphaltLighted
- 16/342,460 ft × 100 ftGrass / turfUnlit
Which aircraft can operate here
vs longest paved runway 5,098 ft
RPX's 5,098 ft paved runway typically supports charter aircraft up to super-midsize jets.
- Turboprop3,000 ft
- Light Jet3,500 ft
- Midsize Jet4,500 ft
- Super-Midsize Jet5,000 ft
- Heavy Jet5,500 ft
- VIP Airliner6,000 ft
Class minimums are sea-level planning rules of thumb. A specific aircraft's balanced-field length varies with weight, temperature, and field elevation. Confirm performance with the operator.
Based charter operators1
Access & alternates
Closest alternate fields by great-circle distance, every listing links to its own field brief.
- 40nmBILBillings Logan International AirportBillings
- 51nmLWTLewistown Municipal AirportLewistown
- 92nmLVMMission FieldLivingston
- 110nmMLSMiles City Airport - Frank Wiley FieldMiles City
- 116nmBZNBozeman Yellowstone International AirportBozeman
- 119nmCODYellowstone Regional AirportCody
Location
Open the full mapKRPX · Roundup Airport · Roundup, MT
Flight times from here
Approximate nonstop block times from RPX on a typical midsize charter jet. Faster classes trim these; add positioning and taxi for the real schedule.
| Destination | Distance | Block time |
|---|---|---|
| Jackson Hole (JAC) | 196 nm | 51m |
| Salt Lake City (SLC) | 373 nm | 1h 16m |
| Vail / Eagle (EGE) | 416 nm | 1h 22m |
| Denver (DEN) | 432 nm | 1h 24m |
| Aspen (ASE) | 442 nm | 1h 26m |
| Seattle (SEA) | 566 nm | 1h 43m |
| Las Vegas (LAS) | 691 nm | 2h 0m |
| Scottsdale (SCF) | 787 nm | 2h 14m |
Common questions
- What size private jets can use RPX?
- Roundup Airport's longest paved runway is 5,098 ft, which typically supports charter aircraft up to super-midsize jets. Lighter classes (turboprops, light and midsize jets) operate comfortably; confirm exact performance for a specific tail with the operator, since balanced-field length shifts with weight, temperature, and elevation.
- What is the longest runway at RPX?
- Roundup Airport has 2 runways; the longest measures 5,098 ft on a paved surface and is lit for night operations.
- Are there charter operators based at RPX?
- Yes. 1 charter operator list Roundup Airport as a home base, including Bull Mountain Aviation LLC. You can also request quotes from operators that reposition aircraft into the field.
- What is the nearest major airport to RPX?
- The closest alternate is Billings Logan International Airport (BIL), about 40 nm away, followed by Lewistown Municipal Airport (LWT) at 51 nm. Operators often position aircraft between these fields depending on ramp space and availability.
- How long is a flight from RPX to major cities?
- Typical block times on a midsize jet: Salt Lake City about 1h 16m (373 nm), Vail / Eagle about 1h 22m (416 nm), Denver about 1h 24m (432 nm). Faster classes trim these times; add positioning and taxi for the real schedule.