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Route Reliability

Chicago → San Jose

MDW–SJC · 1,838 miles · Chicago Midway International Airport to San José Mineta International Airport

74
Usually Fine
WanderNerd Reliability Score
72%
Arrive within 15 minutes
10 min
Average arrival delay
1.1%
Cancelled
545
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 72% of the time across 545 flights. No comparison to make.

What the data says

Morning-you made the right choice.

MDW–SJC flights departing between 6–9 AM arrived on time 85% of the time, versus 43% between 9 PM–12 AM.

Sunday scaries are real for this one.

MDW–SJC flights arrived on time 78% of the time on Wednesdays and just 56% on Sundays. That gap is worth planning around.

Recent months have been rougher.

MDW–SJC flights arrived on time 66% of the time over the last three months in the data, compared with 79% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon70%(84 flights)
  • Tue74%(81 flights)
  • Wed78%(81 flights)
  • Thu75%(85 flights)
  • Fri73%(85 flights)
  • Sat73%(59 flights)
  • Sun56%(63 flights)
On-time by departure window
  • 6–9 AM85%(168 flights)
  • 9 AM–12 PM77%(108 flights)
  • 12–3 PM—(1 flights)
  • 3–6 PM66%(118 flights)
  • 6–9 PM60%(129 flights)
  • 9 PM–12 AM43%(14 flights)
On-time trend by month
70%
May

Jun 69% → May 70% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%67
July 202573%79
August 202578%54
September 202573%52
October 202563%32
November 202586%28
December 202577%31
January 202671%14
February 202690%19
March 202660%50
April 202667%55
May 202670%57

Same trip, other airports

Keep nerding

Based on 545 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.