Historical on-time performance
Oakland to Chicago
1,844 miData through May 2026Source: US DOT · BTS
Flights on OAK–MDW arrive on time 86% of the time over the last 12 months.
On-time rate86%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 431 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time86%Medianon timep9015 minCancel0.2%Flights431
Why flights run late
Delay causes
- Airline41%
- Weather0%
- Air traffic (NAS)26%
- Late aircraft33%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 1 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 OAK → MDW
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 91% on time.
- Mornings91% on time · p90 10 min · 886 flights
- Middays82% on time · p90 25 min · 295 flights
- Evenings63% on time · p90 60 min · 398 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 85% on time.
- Saturdays85% on time · p90 20 min · 239 flights
- Sundays83% on time · p90 30 min · 236 flights
- Wednesdays83% on time · p90 15 min · 257 flights
- Thursdays83% on time · p90 20 min · 245 flights
- Tuesdays83% on time · p90 20 min · 256 flights
- Fridays80% on time · p90 30 min · 246 flights
- Mondays75% on time · p90 30 min · 242 flights
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