Historical on-time performance
Oakland to Chicago
1,844 miData through Dec 2025Source: US DOT · BTS
Flights on OAK–MDW arrive on time 88% of the time over the last 12 months.
On-time rate88%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 368 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time88%Medianon timep9015 minCancel0.3%Flights368
Why flights run late
Delay causes
- Airline58%
- Weather0%
- Air traffic (NAS)21%
- Late aircraft22%
- Security0%
Most delay minutes here are attributed to Airline.
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 (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 92% on time.
- Mornings92% on time · p90 10 min · 931 flights
- Middays82% on time · p90 25 min · 329 flights
- Evenings61% on time · p90 60 min · 467 flights
- Afternoons56% on time · p90 60 min · 55 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 86% on time.
- Saturdays86% on time · p90 20 min · 237 flights
- Sundays84% on time · p90 30 min · 253 flights
- Tuesdays82% on time · p90 20 min · 267 flights
- Thursdays82% on time · p90 35 min · 252 flights
- Wednesdays81% on time · p90 20 min · 267 flights
- Fridays78% on time · p90 30 min · 253 flights
- Mondays76% on time · p90 30 min · 253 flights
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