Bult Field (C56), Illinois
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Bult Field (C56) is a public-use, non-towered airport in Monee, Illinois, sitting roughly 30 nm from the Chicago metro area and serving as a general aviation field for the region. Business aviation traffic here is modest, with FAA TFMSC data recording 360 business aviation operations against 543 total operations in 2025. The field is attended daily from 0800 to 1700, offers both 100LL and Jet A fuel, and coordinates clearance delivery through Chicago ARTCC given the lack of a control tower. Nearby fields include Lansing Municipal, Griffith-Merrillville, and Gary / Chicago International, the latter also serving as the nearest customs point of entry.
Runways
Bult Field has one paved runway, 09/27, 5,001 ft long and 75 ft wide, with a concrete surface.
Runway geometry from published threshold coordinates. Not for navigation.
Source: FAA Form 5010.
Fuel and airfield services
Bult Field has Jet A and 100LL available on the field. Fueling is available from 8am to 5pm, daily, and the airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Bult Field does not clear customs. The nearest port of entry is Gary / Chicago International (KGYY), 19 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Bult Field recorded 360 business aviation movements in 2025. Traffic peaks in May, July and December. Business aviation traffic at Bult Fld (C56) is concentrated in the warmer months, with May, July, and December showing the highest monthly operations while January and February see the fewest.
Business jet movements, FAA TFMSC count. Peak month May, 42 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Weather station is 3.9 NM from the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Bult Field has published operating constraints in three categories: runway notes, environmental and other notes.
Runway 27 has a 12-foot road located 141 feet from the runway end, on centerline.
Runway 09 has an 8-foot road located 156 feet from the runway end, on centerline.
This is the calm wind runway.
Birds and animals are present on and in the vicinity of the airport.
100LL fuel is available 24 hours a day with a credit card.
Jet A fuel is available after hours with prior arrangement.
For clearance delivery, contact Chicago ARTCC.
Source: FAA Chart Supplement.
Nearby airfields
Bult Field has five airfields within 24 NM. The closest is Lansing Municipal (KIGQ), 11.62 NM northeast.
Part of the Chicago area.
Source: Skystar calculation from official coordinates.
Skystar at C56
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$1,200.00 catering order at C56.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
It does not move with the size of the order.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
Is Jet A fuel available at C56 (Bult Field)?
Jet A is available at Bult Field (C56), but only after hours and with prior arrangement rather than on a walk-up basis. 100LL, by contrast, is available H24 with a credit card. Dispatchers planning a Jet A uplift outside the 0800-1700 attendance schedule should arrange fueling ahead of arrival.
Does Bult Field have customs clearance onsite?
Bult Field (C56) does not have customs service onsite. The nearest customs airport of entry is Gary / Chicago International (KGYY), located about 18.70 nm away. Crews requiring customs clearance need to route through KGYY rather than C56 directly.
What is the runway length at KC56... at C56?
C56 (Bult Field) has a single runway, 09/27, measuring 5001 feet long and 75 feet wide with a concrete surface. This is the airport's only paved runway and matches the field's maximum paved runway length. There is no tower on the field, and calm-wind operations default to this runway.
What obstacles should pilots be aware of on approach to Bult Field?
Bult Field (C56) has close-in road obstructions on both runway ends. Runway 27 has a 12-foot road 141 feet from the runway end on centerline, and runway 09 has an 8-foot road 156 feet from the runway end on centerline. Bird and animal activity on and in the vicinity of the airport is also noted.