IAD → SDFWashington to Louisville

live

Direct flights from Washington (IAD) to Louisville (SDF): 17 nonstop departures observed each week across 2 airlines. 65% of the last 20 tracked flights arrived within 15 minutes of schedule. The median arrival is 9 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 2 November 2026 at 20:18 UTC.

Today, IAD → SDF

Mon 2 Nov · local times
  1. 08:37 UA3685United Left 08:58 +21 Landed 10:12 −22
  2. 12:50 UA3980United Sched 12:50Departure not confirmed by the board SDF 14:47scheduled
  3. 12:50 YV3980Mesa Airlines Left 13:08 +18 Landed 14:27 +19
  4. 17:35 UA4055United On schedule ·

Checked IAD board 15:18 · SDF board 15:03

IAD Washington smooth · +14
SDF Louisville busy · +15
725 km · ~1h 26m est.
dep bank 08:37–17:3517x weekly
Runs mixed · 2 airlines · 17x weekly · nonstop
65% on time

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

Median arrival delay is +9 min. 0 of 20 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+9 minacross the last 20 arrivals
Flight time~1h 26mestimated from route distance
Weekly departures17x2 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 AirlinesYV50% on time

Flights YV3980 12:50 daily · YV4055 17:35 Mo Tu We Th Fr Su

United AirlinesUA100% on time

Flights UA3685 08:37 Mo Th Fr Su

History

operated legs · board outcomes
11-02UA3685dep +21 → arr−22
11-02YV3980dep +18 → arr+19
11-01UA3685dep +8 → arr−36
11-01YV3980dep +11 → arr+7
11-01YV4055dep +28 → arr+29
10-31SY8756dep −9 → arr−7
10-31YV3980dep +186 → arr+183
10-30UA3685dep +20 → arr−28
10-30YV3980dep +16 → arr+10
10-30YV4055dep +30 → arr+0
10-29UA3685dep +11 → arr−28
10-29YV3980dep +23 → arr+24
10-29YV4055dep +18 → arr+18
10-28YV3980dep +16 → arr+9
10-28YV4055dep +11 → arr+14
10-27YV3980dep +22 → arr+33
10-27YV4055dep +1 → arr+34
10-26UA3685dep +14 → arr−25
10-26YV3980dep +19 → arr+1
10-26YV4055dep +9 → arr+6

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 +14 min smooth 🌤 mostly cloudy · SE 5 kt Full IAD delay board →
SDFLouisville +15 min busy 🌤 overcast · E 4 kt Full SDF delay board →

Weather lens

Conditions are tightest at IAD and SDF: a 37% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +5 min. Both figures come from the two airports' delay records in similar weather. 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?

Mostly on schedule. The arrival side at SDF is the weaker end, route health score 81/100. 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 08:37 and evening departures around 17:35 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 17 flights a week between them. Compare carrier days and times in the airline list above.