Route
MDW → SJC
Chicago Midway International Airport Mineta San Jose International Airport
1,838 miles
Return route SJC → MDW →
How punctual is this route?
- On-time arrivals
- 65.3%
- Less than 15 minutes late
- Cancelled
- 1.3%
- Of scheduled flights
- Average delay when late
- 52 min
- Flights arriving 15+ minutes late
- Flights tracked
- 526
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 49%
- Airline (crew, maintenance, cleaning) 33%
- Air traffic control & airport 16%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 71.2% | 52 |
| October 2025 | 59.4% | 32 |
| November 2025 | 85.7% | 30 |
| December 2025 | 77.4% | 31 |
| January 2026 | 71.4% | 14 |
| February 2026 | 89.5% | 19 |
| March 2026 | 60.0% | 52 |
| April 2026 | 65.5% | 56 |
| May 2026 | 68.4% | 57 |
| June 2026 | 50.0% | 60 |
| July 2026 | 72.1% | 61 |
| August 2026 | 48.4% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 526 | 65.3% | 1.3% | 52 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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