Los Angeles (LAX) to Chicago (MDW): On-Time Performance
Data through July 2026
Los Angeles (LAX) to Chicago (MDW) effectively runs on two schedules. In February 2025, 95% of arrivals were on time; in July 2026 that fell to 63% — a 33-point seasonal swing. Across the full period the route averages 81% on-time against a national 78%. Morning departures also hold up better than evening ones (88% vs 79%), which matters most in the rough months.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.4%
- Flights/day
- 3.6
- last 12 months
- Duration
- 3h 59m
- scheduled
- Distance
- 1,751 mi
Monthly on-time trend
Best time to fly from LAX to MDW
Aim for departures around 5 a.m. (93% on-time); avoid 3 p.m. departures (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 11 min |
| Tuesday | 80% | 10 min |
| Wednesday | 85% | 8 min |
| Thursday | 80% | 12 min |
| Friday | 79% | 10 min |
| Saturdaybest | 87% | 7 min |
| Sunday | 80% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft45%
- Airline operations40%
- National airspace system14%
- Weather1%
Frequently asked questions
- How often are flights from LAX to MDW delayed?
- 19% of LAX–MDW 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 10 minutes.
- What is the best time of day to fly from LAX to MDW?
- Departures around 5 a.m. have the best record (93% on-time), while departures around 3 p.m. have the worst (59%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAX to MDW?
- The scheduled LAX–MDW flight time averages 3h 59m over 1,751 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are LAX to MDW flights cancelled?
- 0.4% 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 LAX to MDW?
- July 2026 was the roughest month in this dataset, with only 63% of arrivals on time. The best was February 2025 at 95%. If your dates are flexible, that 33-point gap is worth planning around.
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Based on 2,807 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.