Airports / Saint Helena, Ascension and Tristan da Cunha / ASI
RAF Ascension Island.
Cat Hill, Saint Helena, Ascension and Tristan da Cunha · 278 ft elevation. A private-aviation gateway on the Bravo register.
FHAW
IATA ASI
0
Operators based
278
Elevation ft
Field elevation
Nearest alternate
Field standing
702 nm
To the nearest alternate
Saint Helena International Airport (HLE).
Overview
RAF Ascension Island (FHAW / ASI) is a mid-sized airport serving Cat Hill, Saint Helena, Ascension and Tristan da Cunha. Field elevation is 278 feet above sea level. Scheduled carriers operate here, and the field also sees regular private and charter activity.
While no charter operators list ASI as their home base, the field is reachable for repositioned charter aircraft from nearby bases. The closest alternate fields are Saint Helena International Airport (HLE, 702 nm), Greenville/Sinoe Airport (SNI, 843 nm), and Spriggs Payne Airport (MLW, 883 nm). The field has a single 10,019-foot paved runway, long enough for charter aircraft up to VIP airliners.
Trip costs from ASI are driven by the aircraft category flown and how far it must reposition. You may also see the field referenced as Wideawake Airfield and Ascension Island Auxiliary Field. Browse operators flying from the area or estimate a trip cost from ASI to plan your flight.
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Field capability
ICAO
FHAW
IATA
ASI
FAA / Local
FHAW
Elevation
278 ft
Coordinates
7.9702° S · 14.3927° 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
Medium
Scheduled svc
Yes
Runways & aircraft access
1 runway
longest 10,019 ft
- 13/3110,019 ft × 150 ftAsphaltLighted
Which aircraft can operate here
vs longest paved runway 10,019 ft
ASI's 10,019 ft paved runway typically supports charter aircraft up to VIP airliners.
- 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.
- 702nmHLESaint Helena International AirportJamestown
- 843nmSNIGreenville/Sinoe AirportGreenville
- 883nmMLWSpriggs Payne AirportMonrovia
- 886nmROBRoberts International AirportMonrovia
- 893nmSPYSan Pedro Airport
- 968nmKBSBo AirportBo
Location
Open the full mapFHAW · RAF Ascension Island · Cat Hill, Saint Helena, Ascension and Tristan da Cunha
Flight times from here
Approximate nonstop block times from ASI on a typical midsize charter jet. Faster classes trim these; add positioning and taxi for the real schedule.
| Destination | Distance | Block time |
|---|---|---|
| Boston (BED) | 4,336 nm | 10h 29m |
| Miami (MIA) | 4,342 nm | 10h 30m |
| Palm Beach (PBI) | 4,349 nm | 10h 31m |
| New York (TEB) | 4,400 nm | 10h 38m |
| Washington DC (IAD) | 4,493 nm | 10h 51m |
| Nashville (BNA) | 4,845 nm | 11h 40m |
| Chicago (ORD) | 5,003 nm | 12h 2m |
| Houston (HOU) | 5,170 nm | 12h 25m |
Common questions
- What size private jets can use ASI?
- RAF Ascension Island's longest paved runway is 10,019 ft, which typically supports charter aircraft up to VIP airliners. 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 ASI?
- RAF Ascension Island has one runway; the longest measures 10,019 ft on a paved surface and is lit for night operations.
- What is the nearest major airport to ASI?
- The closest alternate is Saint Helena International Airport (HLE), about 702 nm away, followed by Greenville/Sinoe Airport (SNI) at 843 nm. Operators often position aircraft between these fields depending on ramp space and availability.
- How long is a flight from ASI to major cities?
- Typical block times on a midsize jet: Boston about 10h 29m (4,336 nm), Miami about 10h 30m (4,342 nm), Palm Beach about 10h 31m (4,349 nm). Faster classes trim these times; add positioning and taxi for the real schedule.