Route
SDF → ORD
Louisville Muhammad Ali International Airport Chicago O'Hare International Airport
How punctual is this route?
- On-time arrivals
- 79.3%
- Less than 15 minutes late
- Cancelled
- 2.7%
- Of scheduled flights
- Average delay when late
- 84 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,795
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 42%
- Late-arriving aircraft 34%
- Airline (crew, maintenance, cleaning) 19%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.6% | 222 |
| October 2025 | 83.5% | 256 |
| November 2025 | 75.3% | 194 |
| December 2025 | 76.0% | 179 |
| January 2026 | 75.4% | 182 |
| February 2026 | 75.1% | 198 |
| March 2026 | 76.2% | 221 |
| April 2026 | 76.3% | 311 |
| May 2026 | 83.2% | 312 |
| June 2026 | 81.0% | 231 |
| July 2026 | 77.8% | 248 |
| August 2026 | 78.6% | 241 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Republic Airways | 1,853 | 82.8% | 2.7% | 73 min |
| SkyWest Airlines | 650 | 69.6% | 3.4% | 102 min |
| Envoy Air | 283 | 79.6% | 1.1% | 87 min |
| United Airlines | 5 | 40.0% | 0.0% | 56 min |
| American Airlines | 3 | 66.7% | 0.0% | 51 min |
| OH | 1 | — | 100.0% | — |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
YX3422
10% late · 348 flights
-
YX4622
14% late · 290 flights
-
YX3653
17% late · 241 flights
-
YX4668
19% late · 74 flights
-
YX4704
6% late · 71 flights
-
MQ3736
7% late · 56 flights
-
OO5612
51% late · 52 flights
-
OO5929
48% late · 47 flights
-
YX3696
6% late · 47 flights
-
YX4432
35% late · 46 flights
-
YX4476
27% late · 46 flights
-
OO5615
28% late · 45 flights
-
YX4692
7% late · 44 flights
-
YX4757
14% late · 44 flights
-
YX4599
21% late · 43 flights
-
YX4646
19% late · 43 flights
-
OO5603
48% late · 41 flights
-
OO5629
39% late · 41 flights
-
YX4360
24% late · 36 flights
-
OO5382
12% late · 35 flights
-
YX3694
26% late · 35 flights
-
YX4539
48% late · 32 flights
-
OO5644
13% late · 31 flights
-
MQ4005
31% late · 30 flights
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