Route
MDW → SLC
Chicago Midway International Airport Salt Lake City International Airport
How punctual is this route?
- On-time arrivals
- 69.0%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 47 min
- Flights arriving 15+ minutes late
- Flights tracked
- 619
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 50%
- Airline (crew, maintenance, cleaning) 25%
- Air traffic control & airport 22%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 76.8% | 56 |
| October 2025 | 87.7% | 57 |
| November 2025 | 78.8% | 35 |
| December 2025 | 54.8% | 42 |
| January 2026 | 78.9% | 39 |
| February 2026 | 78.3% | 46 |
| March 2026 | 60.7% | 60 |
| April 2026 | 63.6% | 57 |
| May 2026 | 67.9% | 56 |
| June 2026 | 51.8% | 56 |
| July 2026 | 75.4% | 58 |
| August 2026 | 57.9% | 57 |
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 |
|---|---|---|---|---|
| Southwest Airlines | 619 | 69.0% | 1.6% | 47 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN1470
27% late · 64 flights
-
WN416
19% late · 57 flights
-
WN2951
21% late · 52 flights
-
WN2081
51% late · 49 flights
-
WN2540
17% late · 47 flights
-
WN744
39% late · 33 flights
-
WN866
48% late · 33 flights
-
WN435
29% late · 31 flights
-
WN2141
15% late · 27 flights
-
WN2660
50% late · 27 flights
-
WN3905
12% late · 26 flights
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