Historical on-time performance
Chicago to Wilmington
761 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–ILM arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights
based on 199 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Envoy AirOn-time88%Medianon timep9020 minCancel0.0%Flights104
- SkyWest AirlinesOn-time74%Medianon timep9060 minCancel0.0%Flights31
- American AirlinesOn-time64%Medianon timep9085 minCancel3.1%Flights64
Why flights run late
Delay causes
- Airline31%
- Weather6%
- Air traffic (NAS)23%
- Late aircraft40%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → ILM
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 — 84% on time.
- Mornings84% on time · p90 25 min · 315 flights
- Middays77% on time · p90 45 min · 208 flights
- Afternoons57% on time · p90 90 min · 80 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 89% on time.
- Tuesdays89% on time · p90 10 min · 73 flights · limited
- Fridays83% on time · p90 45 min · 87 flights · limited
- Wednesdays81% on time · p90 35 min · 70 flights · limited
- Mondays80% on time · p90 45 min · 79 flights · limited
- Thursdays76% on time · p90 50 min · 88 flights · limited
- Sundays71% on time · p90 60 min · 97 flights · limited
- Saturdays71% on time · p90 85 min · 110 flights · limited
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