United AirlinesUA100% on time
Flights UA444 varies Mo We Fr Su · UA2129 varies Mo Tu Th Fr Sa Su
live
Direct flights from San Diego (NZY) to Washington (IAD): 7 nonstop departures observed each week across 1 airline. 100% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is 26 minutes early. No cancellations were recorded across the 7 tracked flights. The nonstop covers 3,622 km, an estimated 5 hours 9 minutes in the air. Measured by Pro Flight Search from live flight boards at San Diego and Washington. Updated 14 September 2026 at 10:18 UTC.
NZY
San Diego
tracking
IAD
Washington
smooth · +0
3,622 km · ~5h 09m est.
Runs reliable · 1 airline · 7x weekly · nonstop
100% on time
of the last 7 operated NZY → IAD flights arrived within 15 minutes
Median arrival delay is −26 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−26 minacross the last 7 operated legs
Flight time~5h 09mestimated from route distance
Weekly departures7x1 direct airline on the leg
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsnext sweep in 120s
How the San Diego to Washington route actually runs
Pro Flight Search records official board updates for nonstop NZY to IAD flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — San Diego (NZY) to Washington (IAD) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/NZY-IAD
NZY to IAD questions
Is NZY–IAD running on time right now?
Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from NZY to IAD?
Great-circle distance is 3,622 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 286–340 min gate-to-gate on this route.
How often does NZY–IAD fly?
United Airlines runs the route with about 10 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at NZY and arrival-side delay at IAD, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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