Route
SLC → MDW
Salt Lake City International Airport Chicago Midway International Airport
How punctual is this route?
- On-time arrivals
- 82.1%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 41 min
- Flights arriving 15+ minutes late
- Flights tracked
- 619
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 38%
- Air traffic control & airport 31%
- Airline (crew, maintenance, cleaning) 30%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.3% | 56 |
| October 2025 | 84.2% | 57 |
| November 2025 | 85.3% | 35 |
| December 2025 | 83.3% | 42 |
| January 2026 | 94.9% | 39 |
| February 2026 | 100.0% | 46 |
| March 2026 | 74.1% | 60 |
| April 2026 | 75.0% | 57 |
| May 2026 | 73.6% | 56 |
| June 2026 | 77.8% | 56 |
| July 2026 | 84.5% | 58 |
| August 2026 | 71.9% | 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 | 82.1% | 0.6% | 41 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN2899
42% late · 58 flights
-
WN4050
2% late · 53 flights
-
WN3749
2% late · 44 flights
-
WN3750
41% late · 43 flights
-
WN2015
6% late · 35 flights
-
WN4471
9% late · 33 flights
-
WN3897
10% late · 30 flights
-
WN481
4% late · 28 flights
-
WN2666
19% late · 27 flights
-
WN3404
30% late · 27 flights
-
WN1418
42% late · 25 flights
-
WN2950
0% late · 24 flights
-
WN4548
42% late · 24 flights
-
WN3601
5% late · 22 flights
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