United AirlinesUA83% on time
Flights UA3438 06:00 Mo We Th Fr Su · UA3508 10:05 daily · UA4067 13:56 daily
live
Direct flights from Louisville (SDF) to Washington (IAD): 7 nonstop departures observed each week across 1 airline. 67% of the last 18 operated flights arrived within 15 minutes of schedule. The median arrival is on schedule. No cancellations were recorded across the 18 tracked flights. The nonstop covers 725 km, an estimated 1 hour 26 minutes in the air. Measured by Pro Flight Search from live flight boards at Louisville and Washington. Updated 7 September 2026 at 02:03 UTC.
SDF
Louisville
smooth · +9
IAD
Washington
smooth · +0
725 km · ~1h 26m est.
Runs mixed · 1 airline · 7x weekly · nonstop
67% on time
of the last 18 operated SDF → IAD flights arrived within 15 minutes
Median arrival delay is +0 min. 0 of 18 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+0 minacross the last 18 operated legs
Flight time~1h 26mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 18
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomes09-06YV4067dep +22 → arr+28
09-05YV4067dep +6 → arr+5
09-04YV4067dep +17 → arr+33
09-03YV4067dep +7 → arr+11
09-02YV4067dep +196 → arr+197
09-01YV4067dep +26 → arr+29
Actual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at SDF: 40% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Louisville to Washington route actually runs
Pro Flight Search records official board updates for nonstop SDF 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 — Louisville (SDF) to Washington (IAD) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SDF-IAD
SDF to IAD questions
Is SDF–IAD running on time right now?
Smooth skies ahead. The departure side at SDF is the weaker end, route health score 93/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on SDF–IAD?
Operators schedule morning departures around 06:00 from SDF. Earlier flights typically land before destination-airport delays accumulate later in the day; check the IAD delay card to confirm conditions when you'd arrive.
How long is the flight from SDF to IAD?
Great-circle distance is 725 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 81–92 min gate-to-gate on this route.
How often does SDF–IAD fly?
United Airlines runs the route with about 19 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
.