Mesa AirlinesYV57% on time
Flights YV3980 varies daily
live
Direct flights from Washington (IAD) to Louisville (SDF): 14 nonstop departures observed each week across 2 airlines. 65% of the last 20 operated flights arrived within 15 minutes of schedule. The median arrival is 7 minutes late. No cancellations were recorded across the 20 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 Washington and Louisville. Updated 19 August 2026 at 02:18 UTC.
IAD
Washington
busy · +24
SDF
Louisville
smooth · +0
725 km · ~1h 26m est.
Runs mixed · 2 airlines · 14x weekly · nonstop
65% on time
of the last 20 operated IAD → SDF flights arrived within 15 minutes
Median arrival delay is +7 min. 0 of 20 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Search live fares for this route →Median arrival+7 minacross the last 20 operated legs
Flight time~1h 26mestimated from route distance
Weekly departures14x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 20
Current nonstop fares
IAD → SDF · one way · economy · 1 adult
TodayChecking…Direct airline fares
TomorrowChecking…Direct airline fares
In one weekChecking…Direct airline fares
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Mesa AirlinesUnited 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 outcomes08-18YV3980dep +14 → arr+7
08-17YV3980dep +44 → arr+40
08-16YV3980dep +19 → arr+19
08-15YV3980dep +21 → arr+0
08-14YV3980dep +10 → arr+4
08-13YV3980dep +43 → arr+41
08-12ERY707dep +17 → arr+37
08-12YV3980dep +19 → arr+12
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: 42% odds of a 15+ minute delay and around +11 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 Washington to Louisville route actually runs
Pro Flight Search tracks every published board update for nonstop IAD to SDF flights: 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. Fares link straight to the operating airline with no markups.
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 — Washington (IAD) to Louisville (SDF) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/IAD-SDF
IAD to SDF questions
Is IAD–SDF running on time right now?
Smooth skies ahead. The departure side at IAD is the weaker end, route health score 84/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on IAD–SDF?
Operators schedule morning departures around 08:35 and evening departures around 17:25 from IAD. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SDF delay card to confirm conditions when you'd arrive.
How long is the flight from IAD to SDF?
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 IAD–SDF fly?
2 carriers operate this route, around 21 flights a week between them. Compare carrier days and times in the airline list above.
.