Chicago (MDW) to San Francisco (SFO) flights
Southwest Airlines flies nonstop from Chicago Midway International Airport to San Francisco International Airport, with about 14 flights a week in July 2026. The 1,855-mile flight takes about 4h 38m gate to gate.
- Distance
- 1,855 mi · 2,985 km
- Flight time
- 4h 38m
- Airlines
- 1
- Seats filled
- 88%
Airlines flying MDW to SFO
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Southwest Airlines | 14 | Boeing 737 MAX 8, Boeing 737-700 / MAX 7, Boeing 737-800 | 69,550 | 4h 38m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
MDW to SFO flight schedule
4 flight numbers flew this route in August 2026. The first usually leaves at 10:15am and the last at 9:10pm. 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 3881Southwest Airlines | 10:15am | 12:50pm | 16 | 13% |
| WN 4843Southwest Airlines | 10:25am | 12:55pm | 14 | 21% |
| WN 4984Southwest Airlines | 7:35pm | 10:05pm | 12 | 25% |
| WN 454Southwest Airlines | 9:10pm | 11:45pm | 12 | 42% |
Is MDW to SFO on time?
From September 2025 to August 2026, 43% of 516 flights arrived within 15 minutes of schedule and 1.2% were cancelled. Flights leaving around 8am were the most punctual (75%), those around 10am the least (27%). Most delay time was caused by air traffic control and airport congestion (44%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 516 | 43% | 33 min | 1.2% |
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 |
|---|---|---|---|
| 8am to 9am | 81 | 75% | |
| 9am to 10am | 17 | 29% | |
| 10am to 11am | 163 | 27% | |
| 11am to 12pm | 14 | 86% | |
| 12pm to 1pm | 17 | 63% | |
| 1pm to 2pm | 13 | 39% | |
| 3pm to 4pm | 16 | 53% | |
| 6pm to 7pm | 12 | 17% | |
| 8pm to 9pm | 12 | 50% | |
| 9pm to 10pm | 147 | 41% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 31 | 4,285 | |
| September 2025 | 30 | 4,016 | |
| October 2025 | 30 | 4,387 | |
| November 2025 | 29 | 4,316 | |
| December 2025 | 31 | 4,734 | |
| January 2026 | 14 | 1,856 | |
| February 2026 | 19 | 2,460 | |
| March 2026 | 54 | 7,495 | |
| April 2026 | 59 | 8,460 | |
| May 2026 | 62 | 9,439 | |
| June 2026 | 60 | 9,052 | |
| July 2026 | 60 | 9,050 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.