Ontario (ONT) to Chicago (MDW) flights
Southwest Airlines flies nonstop from Ontario International Airport to Chicago Midway International Airport, with about 7 flights a week in July 2026. The 1,706-mile flight takes about 3h 39m gate to gate.
- Distance
- 1,706 mi · 2,746 km
- Flight time
- 3h 39m
- Airlines
- 1
- Seats filled
- 74%
Airlines flying ONT to MDW
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 7 | Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 7 | 44,930 | 3h 39m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ONT to MDW flight schedule
1 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 11:55pm and the last at 11:55pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| WN 3082Southwest Airlines | 11:55pm | 5:45am | 28 | 100% |
Is ONT to MDW on time?
From September 2025 to August 2026, 91% of 360 flights arrived within 15 minutes of schedule and 0.3% were cancelled. Flights leaving around 6am were the most punctual (94%), those around 11am the least (87%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (40%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 360 | 91% | 5 min | 0.3% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 118 | 94% | |
| 8am to 9am | 22 | 91% | |
| 11am to 12pm | 23 | 87% | |
| 11pm to 12am | 180 | 90% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 30 | 3,846 | |
| September 2025 | 30 | 3,550 | |
| October 2025 | 31 | 4,236 | |
| November 2025 | 29 | 3,890 | |
| December 2025 | 31 | 4,236 | |
| January 2026 | 27 | 3,370 | |
| February 2026 | 28 | 3,375 | |
| March 2026 | 31 | 3,278 | |
| April 2026 | 29 | 2,826 | |
| May 2026 | 31 | 2,854 | |
| June 2026 | 30 | 4,842 | |
| July 2026 | 31 | 4,627 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.