Historical on-time performance
San Diego to Chicago
Flights on SAN–MDW arrive on time 76% of the time over the last 12 months.
based on 1,067 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time76%Medianon timep9035 minCancel0.9%Flights1,067
Why flights run late
Delay causes
- Airline33%
- Weather0%
- Air traffic (NAS)16%
- Late aircraft50%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline30%
- Weather70%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 10 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SAN → MDW
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 64% to 93% on time.
- Overnights93% on time · p90 5 min · 102 flights · limited
- Mornings89% on time · p90 10 min · 1,084 flights
- Middays75% on time · p90 30 min · 845 flights
- Evenings65% on time · p90 65 min · 742 flights
- Afternoons64% on time · p90 60 min · 402 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 83% on time.
- Saturdays83% on time · p90 20 min · 384 flights
- Wednesdays80% on time · p90 30 min · 448 flights
- Tuesdays78% on time · p90 35 min · 446 flights
- Mondays76% on time · p90 30 min · 487 flights
- Thursdays75% on time · p90 45 min · 490 flights
- Fridays74% on time · p90 40 min · 493 flights
- Sundays71% on time · p90 45 min · 427 flights
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