Louisville (SDF) to Denver (DEN) flights
United Airlines, Southwest Airlines fly nonstop from Louisville Muhammad Ali International Airport to Denver International Airport, with about 20 flights a week in July 2026. The 1,024-mile flight takes about 2h 55m gate to gate.
- Distance
- 1,024 mi · 1,648 km
- Flight time
- 2h 55m
- Airlines
- 2
- Seats filled
- 78%
Airlines flying SDF to DEN
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 13 | Airbus A319, Airbus A320-100/200, Boeing 737-800 | 78,569 | 2h 58m |
| Southwest Airlines | 7 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 42,224 | 2h 48m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SDF to DEN flight schedule
7 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 8:00am and the last at 3:25pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| UA 1506United Airlines | 8:00am | 8:55am | 10 | 95% |
| UA 1547United Airlines | 8:00am | 8:55am | 21 | 76% |
| WN 550Southwest Airlines | 10:40am | 11:25am | 12 | 92% |
| WN 314Southwest Airlines | 12:10pm | 12:55pm | 8 | n/a |
| WN 4499Southwest Airlines | 1:25pm | 2:10pm | 4 | n/a |
| WN 2901Southwest Airlines | 2:55pm | 3:40pm | 4 | n/a |
| UA 1510United Airlines | 3:25pm | 4:26pm | 31 | 81% |
Is SDF to DEN on time?
From September 2025 to August 2026, 84% of 1,096 flights arrived within 15 minutes of schedule and 1% were cancelled. Flights leaving around 6am were the most punctual (95%), those around 1pm the least (80%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (46%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 730 | 86% | 11 min | 1% |
| Southwest Airlines | 366 | 81% | 12 min | 1.1% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 78 | 95% | |
| 8am to 9am | 188 | 91% | |
| 9am to 10am | 177 | 92% | |
| 11am to 12pm | 24 | 67% | |
| 1pm to 2pm | 110 | 80% | |
| 3pm to 4pm | 384 | 80% | |
| 4pm to 5pm | 22 | 52% | |
| 5pm to 6pm | 23 | 74% | |
| 6pm to 7pm | 22 | 68% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 94 | 10,268 | |
| September 2025 | 90 | 11,519 | |
| October 2025 | 93 | 11,281 | |
| November 2025 | 87 | 8,541 | |
| December 2025 | 92 | 10,268 | |
| January 2026 | 87 | 7,849 | |
| February 2026 | 84 | 9,064 | |
| March 2026 | 92 | 9,409 | |
| April 2026 | 91 | 9,455 | |
| May 2026 | 95 | 10,953 | |
| June 2026 | 88 | 11,116 | |
| July 2026 | 88 | 11,070 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.