Islesboro Airport (57B), Maine
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Islesboro (57B) is a public-use airport on Maine's Islesboro island, served by a single paved runway. It sees light traffic year-round, with no on-site customs or fuel data reported. The field is unattended and closed at night.
Runways
Islesboro Airport has one paved runway, 01/19, 2,400 ft long and 50 ft wide, with an asphalt surface.
Runway geometry from published threshold coordinates. Not for navigation.
Helipads and surfaces under 500 ft are excluded.
Source: FAA Form 5010.
Fuel and airfield services
The airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Islesboro Airport does not clear customs. The nearest port of entry is Bangor International (KBGR), 31 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Islesboro Airport recorded 305 business aviation movements in 2025. Traffic peaks in August. Traffic at Islesboro concentrates in the summer months, with July and August each posting the highest monthly operations recorded in 2025.
Business jet movements, FAA TFMSC count. Peak month August, 69 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Islesboro Airport averages 0.7 days above 90°F in July, 30.3 freeze days in January and 4.7 snow days in January. July is the warmest month, with average highs of 77.0°F, and January the coldest, at 29.5°F.
Weather station is 6.5 NM from the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Islesboro Airport has published operating constraints in five categories: access, runway notes, noise procedures, environmental and other notes.
For clearance delivery, contact Bangor Approach.
Trees 35-45 feet tall stand 0-200 feet from the threshold, 90-125 feet left of centerline, and 120-125 feet left and right of centerline.
A 10-foot road lies 107 feet right of centerline. 45-foot trees stand 100-200 feet from the threshold, 120 feet right of centerline. 10-20 foot brush stands 100-200 feet from the threshold, 105 feet left of centerline.
The approach ratio is 0:1 to the displaced threshold due to a 35-foot tree located at the displaced threshold, 120 feet left of centerline.
Noise abatement procedure: maintain runway heading until 1,000 feet AGL.
Deer are present on and in the vicinity of the airport.
The airport is closed at night; daytime use only.
A helipad is located at the northwest corner of the ramp.
Source: FAA Chart Supplement.
Nearby airfields
Islesboro Airport has five airfields within 35 NM. The closest is Belfast Municipal (KBST), 7.75 NM northwest.
Part of the Maine and New Hampshire area.
Source: Skystar calculation from official coordinates.
Skystar at 57B
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.
$600.00 catering order at 57B.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
The $75 minimum applies below $862.50.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
What runway length is available at Islesboro (57B)?
Islesboro's only fixed-wing runway, 01/19, is a paved asphalt strip measuring 2,400 feet by 50 feet. This is also the airport's maximum paved surface length, so aircraft requiring longer runways cannot operate there.
Is there fuel available at KIslesboro airport 57B?
Fuel type and availability are not listed in the data for Islesboro (57B). Dispatchers should confirm fuel status directly with the airport before planning a stop, since none is confirmed on site.
Where is the nearest customs clearance point for 57B?
There is no customs facility on site at Islesboro (57B). The nearest customs airport is Bangor International (KBGR), located about 30.52 nautical miles away.