IAD → SDFWashington to Louisville

live

Direct flights from Washington (IAD) to Louisville (SDF): 14 nonstop departures observed each week across 2 airlines. 70% of the last 20 operated flights arrived within 15 minutes of schedule. The median arrival is 4 minutes early. 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 10 October 2026 at 14:18 UTC.

IAD Washington smooth · +13
SDF Louisville smooth · +0
725 km · ~1h 26m est.
dep bank 08:35–17:3414x weekly
Runs mixed · 2 airlines · 14x weekly · nonstop
70% on time

of the last 20 operated IAD → SDF flights arrived within 15 minutes

Median arrival delay is −4 min. 0 of 20 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−4 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

The week

scheduled departures · origin local time
06121824
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 days
Mesa AirlinesYV29% on time

Flights YV3980 12:55 daily

United AirlinesUA92% on time

Flights UA3525 08:35 Mo Tu We Th Fr Su · UA6127 17:34 daily

History

operated legs · board outcomes
10-09UA3525dep +44 → arr−20
10-09UA6127dep +7 → arr−23
10-09YV3980dep +36 → arr+29
10-08UA3525dep +20 → arr−4
10-08UA6127dep +19 → arr−16
10-08YV3980dep +23 → arr+18
10-07UA3525dep +12 → arr−17
10-07UA6127dep +10 → arr−24
10-07YV3980dep +68 → arr+64
10-06UA3525dep +18 → arr−16
10-06UA6127dep +44 → arr+8
10-06YV3980dep +17 → arr+12
10-05UA3525dep +23 → arr−4
10-05UA6127dep +93 → arr+51
10-05YV3980dep +7 → arr−100
10-04UA3525dep +23 → arr−4
10-04UA6127dep +21 → arr−13
10-04YV3980dep +22 → arr+18
10-03UA6127departed+9
10-03YV3980departed+22

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
IADWashington +13 min smooth 🌤 overcast · N 0 kt Full IAD delay board →
SDFLouisville +0 min smooth 🌤 overcast · E 4 kt Full SDF delay board →

Weather lens

Current conditions put the pressure at SDF: 38% odds of a 15+ minute delay and around +7 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Washington to Louisville route actually runs

Pro Flight Search records official board updates for nonstop IAD to SDF 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 — Washington (IAD) to Louisville (SDF) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/IAD-SDF
How we measure this →

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 91/100. 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 17:34 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 20 flights a week between them. Compare carrier days and times in the airline list above.