Unknown Field (1MA5)

Current Conditions at K1MA5

Unknown Field, Southborough, MA

Airport Overview

The Southborough, MA region is served by Unknown Field (1MA5), a public-use airport at 432 feet elevation. Runway infrastructure includes 1 strip(s); the primary surface extends 1,500 feet (N/A). Operators and private travelers use Unknown Field for its direct ramp access and minimal ground delays. For official FAA airport data, visit the FAA Airport Data portal or AirNav 1MA5.

Private Aviation Briefing

1MA5 is the identifier for Unknown Field, serving Southborough at 432 ft MSL elevation. Operators, passengers, and dispatchers should note the following details for flight planning and charter operations.

U.S. General Aviation Context

Unknown Field is part of the U.S. National Airspace System, regulated by the FAA. As a MA facility, the airport contributes to the regional transportation network connecting Southborough to the broader aviation system. FAA Part 135 charter operators serve this airport, and The Jet Finder can source aircraft positioned near 1MA5 for on-demand charter.

Runway Capability

Unknown Field's 1500-foot runway limits operations to piston aircraft, light turboprops, and select short-field-capable jets. The Pilatus PC-12 (2,600 ft required), Cessna Caravan, and King Air C90 are among the turbine aircraft that can use fields of this length. Charter passengers should coordinate with The Jet Finder to identify aircraft types suited to 1MA5's runway.

Charter Considerations

Ground transportation at Unknown Field is a factor in total travel time. Private aviation eliminates the commercial terminal experience, but the drive from 1MA5 to your final destination determines the true door-to-door advantage. FBOs at most airports offer car service coordination, rental car delivery to the ramp, and concierge ground transportation for arriving passengers.

What to Know Before You Fly

Fuel pricing varies significantly between airports and FBOs. Jet-A at Unknown Field may cost $5.50 to $10.00 per gallon depending on the FBO. On shorter flights, fuel cost is a minor component. On longer legs, the price difference between FBOs adds up. The Jet Finder factors fuel cost into charter quotes to ensure accurate pricing from 1MA5.

Safety & Planning

Flight planning from Unknown Field accounts for current NOTAMs, TFRs, and airspace restrictions. Pilots operating from 1MA5 check published notices before every departure. Temporary flight restrictions near stadiums, presidential movements, and military operations can affect routing and timing. The Jet Finder monitors these factors and communicates schedule impacts proactively.

Airport Selection Strategy

Based aircraft availability at Unknown Field directly impacts charter pricing. Airports with more locally based jets generate lower positioning costs. If 1MA5 has limited based aircraft, the charter operator repositions from the nearest base, adding 30 to 60 minutes of flight time at the hourly rate. The Jet Finder identifies the closest available aircraft to minimize this cost.

Seasonal Factors

Convective weather season (May through September) impacts afternoon scheduling reliability at Unknown Field. Thunderstorm activity typically builds after 2:00 PM local time, potentially delaying departures from 1MA5. Morning flights on this corridor routinely depart on schedule. The Jet Finder recommends morning departures when schedule certainty matters.

Location & Address

Geographically, Unknown Field (1MA5) is located at 42.2790° N, -71.5478° W near Southborough, MA. FBO-arranged car service or rideshare connects passengers from Unknown Field to Southborough and surrounding areas efficiently.

Runways & Facilities

At 1,500 feet, Unknown Field's runway accommodates piston singles and light turboprops. Jet operations are not practical at this field length. Pilots flying larger aircraft should plan for a nearby airport with more runway.

FBOs & Ground Services

Aircraft services at 1MA5 are handled by the airport's fixed base operation. Standard general aviation services — fuel, parking, aircraft positioning — are typically available during operating hours. Contact Unknown Field directly for current service hours, fuel pricing, and hangar availability.

Charter a Jet from Unknown Field

Private charter from 1MA5 starts with a single call. The Jet Finder sources aircraft from a nationwide network of FAA Part 135 operators, matching runway capabilities at 1MA5 with the right aircraft for your route.

Fly Private from 1MA5

The Jet Finder coordinates charter flights from Unknown Field. Tell us your destination, dates, and passenger count. We source aircraft from FAA Part 135 operators matched to 1MA5's runway and facilities.

Airport Specifications

Airport Identity
Airport Name	Unknown Field
ICAO Code	1MA5
IATA Code	1MA5
FAA Identifier	1MA5
Address	Southborough, MA
Elevation	432 ft MSL
Coordinates	42.2790° N, 71.5478° W
FAA Data	AirNav 1MA5

Operations & Facilities
Runways	11/29: 1,500 ft (ASPH)
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

Massachusetts's GA airports serve the Boston metro area's financial and tech sectors. Cape Cod and the Islands (Nantucket, Martha's Vineyard) drive seasonal charter demand.

Operational Considerations

Unknown Field's 432-foot field elevation keeps density altitude effects manageable. Even on warm days, density altitude here tops out around 2,232 feet — within normal performance parameters for most aircraft. The 1,500-foot runway provides approximately 1,481 feet of effective sea-level performance.

Unknown Field's temperate latitude produces generally favorable flying conditions with seasonal variation. Winter brings frontal passages that can drop ceilings to IFR minimums for 24-48 hour periods. Freezing precipitation is possible but less persistent than at higher latitudes. Summer convective activity peaks in late afternoon — morning departures typically encounter smoother, clearer conditions. Year-round instrument currency is recommended for reliable scheduling.

Nearby Airports

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

Wormid Airport

08MA · 2 NM from 1MA5

Minuteman Airfield

none · 11 NM from 1MA5

Stow/Minute Man Air Field

K6B6 · 11 NM from 1MA5

Sterling Airport

K3B3 · 14 NM from 1MA5

Frequently Asked Questions

The airport code for Unknown Field is 1MA5. This identifier appears on sectional charts, in the Airport/Facility Directory, and in electronic flight planning tools.

Unknown Field serves the Southborough area in MA. GPS coordinates: 42.2790° N, 71.5478° W. The airport sits at 432 feet above sea level.

Runway 11/29 is the main strip at Unknown Field, providing 1,500 feet of ASPH runway. The airport has 1 total runway(s).

Private jet operations at Unknown Field (1MA5) depend on runway length and aircraft performance. The longest runway at 1,500 feet can accommodate most light jets and turboprops. Larger aircraft should verify takeoff and landing distances against current conditions.

The FBO at Unknown Field handles fuel, parking, and ground coordination for arriving aircraft. Visit AirNav for current operator contact information at 1MA5. Pre-arrival calls are advisable.

The airport elevation at Unknown Field is 432 feet MSL. Pilots should factor this into takeoff and landing performance calculations, especially during summer operations.

Approach procedures at 1MA5 are published in the FAA's instrument approach plates. Consult current charts for the latest procedure information at Unknown Field. RNAV and conventional approaches may be available depending on the facility.

Private charter from 1MA5 is available through The Jet Finder. We connect clients with FAA-certificated Part 135 operators. Pricing depends on aircraft type, destination, and scheduling.

Aircraft types at Unknown Field are limited by the 1,500-foot runway. Light jets (Citation CJ series, Phenom 100/300), turboprops (King Air, PC-12), and piston singles operate without issues. Larger jets require performance verification.

Radio frequencies for Unknown Field (1MA5) appear in the A/FD and electronic chart supplements. If untowered, use standard CTAF procedures for traffic separation and position reporting.

Fuel types and pricing at Unknown 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.

For international departures or arrivals at 1MA5, CBP services are required. Availability depends on the facility. Some airports in the region may offer more convenient customs access. The Jet Finder can advise on the best routing.

Real-time weather for Unknown Field (1MA5) is available through METAR reports on aviationweather.gov. MA experiences varied conditions throughout the year — plan accordingly for seasonal weather events.

1MA5 provides access to Southborough, MA. Ground transfer time from Unknown Field to local destinations is generally efficient. The airport's GA-specific environment means no terminal queues — just a direct walk from ramp to vehicle.

Unknown Field offers aircraft parking for visiting and based aircraft. Tiedown and hangar rates at 1MA5 should be confirmed directly with the airport. Overnight parking may require advance arrangement.

Request a charter quote from 1MA5 through The Jet Finder. Provide departure date, destination, passenger count, and luggage requirements. We source availability from multiple Part 135 operators for competitive pricing.

Ready to Fly from 1MA5?

Experience the difference of private aviation at Unknown Field.