Best Time to Fly LAX to MDW: On-Time Stats by Hour & Airline
Los Angeles International → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
1,298 flights were scheduled from Los Angeles (LAX) to Chicago (MDW) in the last 12 months, and 77.4% of those that flew arrived on time, in line with the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
February has been the best month (89% on time) and Friday the weakest day of the week (81%).
0.6% of flights were cancelled, versus 1.8% nationally.
LAX to MDW on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 77.4% | 44 min | 0.6% | 1,298 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAX to MDW
On-time arrival % by scheduled departure hour (local time), 2,661 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.2% | 0.8% | 369 |
| 6am–7am | 93.4% | 0.3% | 319 |
| 7am–8am | Limited data | 14 | |
| 8am–9am | 94.4% | 0.0% | 144 |
| 9am–10am | Limited data | 21 | |
| 10am–11am | 80.8% | 0.0% | 120 |
| 11am–12pm | 77.4% | 0.0% | 295 |
| 12pm–1pm | 69.6% | 1.6% | 128 |
| 1pm–2pm | 83.1% | 0.5% | 192 |
| 2pm–3pm | 73.9% | 0.0% | 46 |
| 3pm–4pm | 62.0% | 1.0% | 102 |
| 4pm–5pm | 70.2% | 0.0% | 152 |
| 5pm–6pm | 72.0% | 0.0% | 93 |
| 6pm–7pm | 67.0% | 0.0% | 110 |
| 7pm–8pm | 67.4% | 0.0% | 43 |
| 10pm–11pm | 85.7% | 0.0% | 71 |
| 11pm–12am | 87.4% | 0.5% | 442 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LAX to MDW
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 82.0% | -2.8 pts | 1.9% | 52 |
| Christmas & New Year (Dec 20 - Jan 3) | 80.7% | -4.0 pts | 0.0% | 115 |
| Summer peak (Jun 15 - Aug 15) | 76.0% | -8.8 pts | 0.2% | 520 |
| All other days | 84.8% | — | 0.4% | 1,974 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).