Best Time to Fly LGA to MDW: On-Time Stats by Hour & Airline
LaGuardia → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
2,385 flights were scheduled from New York (LGA) to Chicago (MDW) in the last 12 months, and 72.5% of those that flew arrived on time, 5.1 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (78% on time) and June the worst month (62%).
The cancellation rate was 4.9% (US average 1.8%).
LGA 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 | 72.5% | 66 min | 4.9% | 2,385 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LGA to MDW
On-time arrival % by scheduled departure hour (local time), 4,744 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 92.3% | 1.6% | 581 |
| 7am–8am | 78.8% | 3.5% | 226 |
| 8am–9am | 86.7% | 6.2% | 32 |
| 9am–10am | 86.3% | 1.9% | 529 |
| 10am–11am | 83.2% | 1.6% | 128 |
| 11am–12pm | 81.8% | 1.9% | 542 |
| 12pm–1pm | 77.8% | 0.0% | 45 |
| 1pm–2pm | 75.2% | 3.8% | 160 |
| 2pm–3pm | 77.2% | 2.8% | 531 |
| 3pm–4pm | 67.5% | 6.1% | 361 |
| 4pm–5pm | 67.0% | 3.5% | 284 |
| 5pm–6pm | 62.0% | 5.2% | 362 |
| 6pm–7pm | 64.0% | 6.3% | 237 |
| 7pm–8pm | 71.4% | 7.8% | 77 |
| 8pm–9pm | 67.7% | 7.9% | 38 |
| 9pm–10pm | 60.7% | 6.5% | 611 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LGA 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) | 85.5% | +7.8 pts | 3.8% | 80 |
| Christmas & New Year (Dec 20 - Jan 3) | 70.6% | -7.2 pts | 1.1% | 184 |
| Summer peak (Jun 15 - Aug 15) | 65.5% | -12.2 pts | 7.6% | 828 |
| All other days | 77.8% | — | 3.0% | 3,652 |
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).