DEN → SDFDenver to Louisville

live

Direct flights from Denver (DEN) to Louisville (SDF): 20 nonstop departures observed each week across 2 airlines. 84% of the last 19 tracked flights arrived within 15 minutes of schedule. The median arrival is 10 minutes early. 3 of the 20 tracked flights were cancelled. The nonstop covers 1,644 km, an estimated 2 hours 36 minutes in the air. Measured by Pro Flight Search from live flight boards at Denver and Louisville. Updated 15 November 2026 at 11:11 UTC.

Today, DEN → SDF

Sun 15 Nov · local times
  1. 09:47 UA1479United Airlines Cancelled ·
  2. 13:10 WN975Southwest Airlines Est. 13:12Gate C47 ·
  3. 17:45 UA514United Airlines Sched 17:45Departure not confirmed by the board ·

Checked DEN board 04:11 · SDF board 06:03

DEN Denver disrupted · +221
SDF Louisville heavy · +30
1,644 km · ~2h 36m est.
dep bank 09:47–18:2020x weekly
Runs reliable · 2 airlines · 20x weekly · nonstop
84% on time

of the last 19 tracked DEN → SDF flights arrived within 15 minutes

Median arrival delay is −10 min. 3 of 20 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−10 minacross the last 16 arrivals
Flight time~2h 36mestimated from route distance
Weekly departures20x2 direct airlines on the leg
Cancelled15.0%recent route rate · 3 of 20

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest 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
Southwest AirlinesWN100% on time

Flights WN975 13:10 Mo Th Fr Su · WN1150 18:20 Tu We

United AirlinesUA79% on time

Flights UA1479 09:47 daily · UA514 17:45 daily

History

operated legs · board outcomes
11-15UA1479cancelledCNX
11-14UA1479dep −4 → arr−10
11-14UA514cancelledCNX
11-13UA1479dep −3 → arr−14
11-13UA514cancelledCNX
11-12UA1479dep −9 → arr−28
11-12UA514dep −3 → arr−25
11-12WN975dep +13 → arr+4
11-11UA1479dep −5 → arr−26
11-11UA514dep +12 → arr+8
11-11WN1150dep +0 → arr−19
11-10UA1479departed−8
11-10UA514dep +15 → arr+1
11-10WN1150dep +13 → arr+0
11-09UA1479dep −1 → arr−12
11-09UA514dep −10 → arr−13
11-09WN975dep +6 → arr+3
11-08UA1479dep −5 → arr−17
11-08UA514dep −4 → arr−10
11-08WN975dep +10 → arr+11

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
DENDenver +221 min disrupted ⛅ overcast · W 4 kt Full DEN delay board →
SDFLouisville +30 min heavy 🌤 clear · N 0 kt Full SDF delay board →

Weather lens

Conditions are tightest at DEN: a 49% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +23 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →

How the Denver to Louisville route actually runs

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

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

DEN to SDF questions

Is DEN–SDF running on time right now?

High disruption likely. The departure side at DEN is the weaker end, route health score 30/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on DEN–SDF?

Operators schedule morning departures around 09:47 and evening departures around 17:45 from DEN. 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 DEN to SDF?

Great-circle distance is 1,644 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 146–171 min gate-to-gate on this route.

How often does DEN–SDF fly?

2 carriers operate this route, around 20 flights a week between them. Compare carrier days and times in the airline list above.