# Flight Time

> Estimate flight time between airports accounting for winds aloft. Use when calculating flight duration, planning trips, or comparing routes. Takes departure/arrival ICAO codes, cruise altitude, and true airspeed.

- Skill: `probichaux/flight-time` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add probichaux/flight-time`
- Raw SKILL.md: https://api.skillmd.com/api/skills/probichaux/flight-time/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Finance & Business
- Author: probichaux (https://skillmd.com/u/probichaux)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/probichaux/flight-time

---


# Flight Time Estimator

Calculates estimated flight time between two airports using:
- Great circle distance
- Current winds aloft forecast (from NOAA Aviation Weather)
- True airspeed at cruise altitude

## Usage

```bash
~/clawd/skills/flight-time/scripts/flight_time.py KDEP KARR --altitude FEET --tas KNOTS
```

### Examples

```bash
# Huntsville to Atlanta at 6000ft, 140kt TAS
flight_time.py KHSV KFTY --altitude 6000 --tas 140

# Dallas to Denver at 10000ft, 165kt TAS
flight_time.py KDAL KDEN --altitude 10000 --tas 165

# JSON output for scripting
flight_time.py KHSV KFTY --altitude 6000 --tas 140 --json
```

### Parameters

- `departure`: ICAO code (e.g., KHSV)
- `arrival`: ICAO code (e.g., KFTY)
- `--altitude`: Cruise altitude in feet MSL
- `--tas`: True airspeed in knots
- `--json`: Output as JSON (optional)

## Output

Returns:
- Distance (nm)
- True course
- Winds at altitude (from nearest FB station)
- Ground speed
- Estimated flight time
- Wind effect (headwind/tailwind impact in minutes)

## Data Sources

- **Airport coordinates**: NOAA Aviation Weather API
- **Winds aloft**: NOAA FB winds forecast (6-hour)

## Limitations

- Uses single wind observation at route midpoint (not full route interpolation)
- Does not account for climb/descent phases
- Wind data updates every 6 hours
- No terrain or airspace considerations