Historical on-time performance
Chicago to Waterloo
234 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–ALO arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled2.3%of scheduled flights
based on 391 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirOn-time72%Medianon timep9060 minCancel2.3%Flights391
Why flights run late
Delay causes
- Airline9%
- Weather17%
- Air traffic (NAS)25%
- Late aircraft49%
- 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 → ALO
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 64% to 78% on time.
- Middays78% on time · p90 40 min · 181 flights · limited
- Mornings71% on time · p90 50 min · 59 flights · limited
- Overnights64% on time · p90 85 min · 182 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 80% on time.
- Saturdays80% on time · p90 25 min · 61 flights · limited
- Mondays76% on time · p90 60 min · 71 flights · limited
- Fridays74% on time · p90 30 min · 68 flights · limited
- Sundays70% on time · p90 75 min · 71 flights · limited
- Tuesdays69% on time · p90 50 min · 59 flights · limited
- Thursdays68% on time · p90 80 min · 66 flights · limited
- Wednesdays66% on time · p90 90 min · 70 flights · limited
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