UAL503
- Airline
- United Airlines (UAL)
- Route
- Tailwind Boston Seaplane Base (US-0568) → Chicago O'Hare International Airport (ORD/KORD)
- Observed take-off
- Observed landing
- Aircraft
- N17358 · B38M
- Positions recorded
- 5155
- Time airborne
- 130 min
Source: observations by the map.flights community network of ADS-B receivers; times in UTC.