MDW to SJC flight delays & on-time performance
Nonstop flights from Chicago Midway International Airport to Mineta San Jose International Airport · 1,838 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MDW or SJC right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (MDW) to San Jose (SJC) arrived on time 69% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.5% were cancelled, and 8% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 8am did best (86% on time); around 9pm did worst (36%).
- Wednesday was the most reliable day to fly (79% on time) and Sunday the least (52%).
- The largest source of delay minutes was late-arriving aircraft (48%).
Which airline is most on time from MDW to SJC?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 69% | 1.5% | 17 min | 8.4% | 519 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am80%31 flights
- 8am86%110 flights
- 10am74%143 flights
- 3pm78%32 flights
- 5pm69%39 flights
- 7pm53%36 flights
- 8pm51%96 flights
- 9pm36%23 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday63%2.5% cancelled
- Tuesday74%1.4% cancelled
- Wednesday79%1.4% cancelled
- Thursday73%2.5% cancelled
- Friday71%0.0% cancelled
- Saturday69%3.3% cancelled
- Sunday52%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft48%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion17%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather75%
- Airline (crew, maintenance, cleaning, fueling)25%
- Air traffic control & airport congestion0%
- Security0%
MDW to SJC: common questions
- How often are MDW to SJC flights on time?
- 69% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to San Jose cancelled?
- 1.5% of scheduled flights were cancelled (8 of 519).
- How long are typical delays?
- Across all flights the average arrival delay was 17 min (early arrivals count as zero). Flights that were late arrived 48 min behind schedule on average, and 8.4% of flights were an hour or more late.
- How long is taxi time at MDW?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SJC to MDW — 84% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MDW → SJC, nonstop flights by US airlines that report to the DOT. How we calculate this.