Best Time to Fly MDW to LGA: On-Time Stats by Hour & Airline
Chicago Midway International → LaGuardia
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 68.8% of Chicago (MDW) to New York (LGA) flights arrived on time (2,385 scheduled flights). That is 8.8 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (79% on time) and June the worst month (61%).
The cancellation rate was 4.2% (US average 1.8%).
MDW to LGA 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 | 68.8% | 57 min | 4.2% | 2,385 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to LGA
On-time arrival % by scheduled departure hour (local time), 4,744 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 90.2% | 1.2% | 167 |
| 6am–7am | 92.9% | 0.9% | 530 |
| 7am–8am | 85.7% | 3.2% | 95 |
| 8am–9am | 84.8% | 1.0% | 579 |
| 9am–10am | 75.3% | 1.3% | 149 |
| 10am–11am | 81.0% | 2.2% | 454 |
| 11am–12pm | 84.2% | 3.1% | 98 |
| 12pm–1pm | 71.6% | 3.3% | 362 |
| 1pm–2pm | 68.4% | 5.1% | 292 |
| 2pm–3pm | 62.0% | 3.8% | 523 |
| 3pm–4pm | 65.5% | 5.7% | 123 |
| 4pm–5pm | Limited data | 19 | |
| 5pm–6pm | 56.7% | 4.1% | 412 |
| 6pm–7pm | 58.4% | 7.6% | 289 |
| 7pm–8pm | 61.6% | 3.4% | 322 |
| 8pm–9pm | 58.5% | 4.2% | 330 |
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 LGA
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) | 79.2% | +4.0 pts | 3.8% | 80 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.2% | -1.0 pts | 1.1% | 184 |
| Summer peak (Jun 15 - Aug 15) | 61.7% | -13.5 pts | 5.6% | 828 |
| All other days | 75.2% | — | 2.7% | 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).