Chicago (MDW) to Salt Lake City (SLC): On-Time Performance
Data through July 2026
The calendar drives reliability on MDW–SLC. April 2025 flights landed on schedule 91% of the time, but June 2026 dropped to 52% — a gap of 39 points. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 66%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 1.7
- last 12 months
- Duration
- 3h 28m
- scheduled
- Distance
- 1,259 mi
Monthly on-time trend
Best time to fly from MDW to SLC
Aim for departures around 9 a.m. (88% on-time); avoid 9 p.m. departures (60%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 78% | 12 min |
| Tuesday | 78% | 12 min |
| Wednesday | 76% | 13 min |
| Thursday | 76% | 15 min |
| Friday | 73% | 12 min |
| Saturday | 77% | 9 min |
| Sunday | 71% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft51%
- Airline operations28%
- National airspace system18%
- Weather3%
Frequently asked questions
- How often are flights from MDW to SLC delayed?
- 25% of MDW–SLC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- What is the best time of day to fly from MDW to SLC?
- Departures around 9 a.m. have the best record (88% on-time), while departures around 9 p.m. have the worst (60%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MDW to SLC?
- The scheduled MDW–SLC flight time averages 3h 28m over 1,259 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are MDW to SLC flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from MDW to SLC?
- June 2026 was the roughest month in this dataset, with only 52% of arrivals on time. The best was April 2025 at 91%. If your dates are flexible, that 39-point gap is worth planning around.
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Based on 1,334 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.