Best Time to Fly MDW to LAX: On-Time Stats by Hour & Airline
Chicago Midway International → Los Angeles International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 69.3% of Chicago (MDW) to Los Angeles (LAX) flights arrived on time (1,298 scheduled flights). That is 8.3 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (79% on time) and June the worst month (62%).
The cancellation rate was 0.9% (US average 1.8%).
MDW to LAX 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 | 69.3% | 50 min | 0.9% | 1,298 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to LAX
On-time arrival % by scheduled departure hour (local time), 2,653 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 92.4% | 0.0% | 145 |
| 6am–7am | 91.6% | 0.6% | 180 |
| 7am–8am | 82.9% | 0.0% | 105 |
| 8am–9am | 80.6% | 1.4% | 214 |
| 9am–10am | 81.1% | 0.8% | 242 |
| 10am–11am | 75.8% | 1.1% | 184 |
| 11am–12pm | 72.5% | 0.0% | 40 |
| 12pm–1pm | 80.7% | 0.0% | 32 |
| 1pm–2pm | 79.0% | 1.3% | 77 |
| 2pm–3pm | 65.4% | 2.4% | 83 |
| 3pm–4pm | 70.2% | 0.0% | 122 |
| 4pm–5pm | 72.0% | 0.7% | 144 |
| 5pm–6pm | 73.1% | 0.0% | 186 |
| 6pm–7pm | 53.5% | 0.8% | 118 |
| 7pm–8pm | 79.5% | 0.0% | 78 |
| 8pm–9pm | 75.2% | 0.0% | 252 |
| 9pm–10pm | 61.9% | 1.1% | 274 |
| 10pm–11pm | 58.6% | 0.6% | 177 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MDW to LAX
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) | 75.0% | -2.3 pts | 5.8% | 52 |
| Christmas & New Year (Dec 20 - Jan 3) | 61.7% | -15.5 pts | 0.0% | 115 |
| Summer peak (Jun 15 - Aug 15) | 67.1% | -10.2 pts | 0.4% | 520 |
| All other days | 77.3% | — | 0.6% | 1,966 |
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).