Airports / Alaska / CYM
Chatham Seaplane Base.
Chatham, Alaska. A private-aviation gateway on the Bravo register.
CYM
IATA CYM
0
Operators based
n/a
Elevation ft
Field standing
12 nm
To the nearest alternate
Angoon Seaplane Base (AGN), 6 fields within 50 nm.
Overview
Chatham Seaplane Base, listed as CYM, is a seaplane base in Chatham, Alaska. The airport supports scheduled airline service as well as private jet and charter movements.
CYM has no resident charter fleet; trips here are typically flown by operators repositioning from surrounding airports. Useful alternates include Angoon Seaplane Base (AGN, 12 nm), Tenakee Seaplane Base (TKE, 18 nm), and Sitka Rocky Gutierrez Airport (SIT, 31 nm). CYM offers a single 10,000-foot unpaved runway, which supports charter types through the turboprop class.
Quotes for flights out of CYM vary with aircraft type, repositioning, and schedule flexibility. Use the cost estimator to model a trip from CYM, or browse verified operators serving the area.
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Field capability
ICAO
CYM
IATA
CYM
FAA / Local
05AA
Elevation
n/a
Coordinates
57.5149° N · 134.9460° 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
Seaplane
Scheduled svc
Yes
Runways & aircraft access
1 runway
longest 10,000 ft
- NW/SE10,000 ft × 1000 ftWaterUnlit
Which aircraft can operate here
vs longest runway 10,000 ft
CYM's 10,000 ft runway typically supports charter aircraft up to turboprops.
- 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.
Access & alternates
Closest alternate fields by great-circle distance, every listing links to its own field brief.
- 12nmAGNAngoon Seaplane BaseAngoon
- 18nmTKETenakee Seaplane BaseTenakee Springs
- 31nmSITSitka Rocky Gutierrez AirportSitka
- 38nmHNHHoonah AirportHoonah
- 44nmFNRFunter Bay Seaplane BaseFunter Bay
- 46nmKAEKake Seaplane BaseKake
Location
Open the full mapCYM · Chatham Seaplane Base · Chatham, AK
Flight times from here
Approximate nonstop block times from CYM on a typical midsize charter jet. Faster classes trim these; add positioning and taxi for the real schedule.
| Destination | Distance | Block time |
|---|---|---|
| Anchorage (ANC) | 509 nm | 1h 35m |
| Seattle (SEA) | 758 nm | 2h 10m |
| Jackson Hole (JAC) | 1,233 nm | 3h 16m |
| San Francisco (SFO) | 1,294 nm | 3h 25m |
| Salt Lake City (SLC) | 1,337 nm | 3h 31m |
| Las Vegas (LAS) | 1,510 nm | 3h 55m |
| Vail / Eagle (EGE) | 1,526 nm | 3h 57m |
| Aspen (ASE) | 1,548 nm | 4h 0m |
Common questions
- What size private jets can use CYM?
- Chatham Seaplane Base's longest runway is 10,000 ft, which typically supports charter aircraft up to turboprops. 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 CYM?
- Chatham Seaplane Base has one runway; the longest measures 10,000 ft.
- What is the nearest major airport to CYM?
- The closest alternate is Angoon Seaplane Base (AGN), about 12 nm away, followed by Tenakee Seaplane Base (TKE) at 18 nm. Operators often position aircraft between these fields depending on ramp space and availability.
- How long is a flight from CYM to major cities?
- Typical block times on a midsize jet: Anchorage about 1h 35m (509 nm), Seattle about 2h 10m (758 nm), Jackson Hole about 3h 16m (1,233 nm). Faster classes trim these times; add positioning and taxi for the real schedule.