Historical on-time performance
Chicago to Waterloo
234 miData through May 2026Source: US DOT · BTS
Flights on ORD–ALO arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled2.4%of scheduled flights
based on 664 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirOn-time70%Medianon timep9065 minCancel2.4%Flights664
Why flights run late
Delay causes
- Airline12%
- Weather18%
- Air traffic (NAS)21%
- Late aircraft49%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather81%
- Air traffic (NAS)19%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 16 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 ORD → ALO
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Middays are the most reliable time of day to fly this route — 76% on time.
- Middays76% on time · p90 50 min · 294 flights
- Overnights64% on time · p90 80 min · 332 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 70% on time.
- Sundays70% on time · p90 80 min · 104 flights · limited
- Mondays70% on time · p90 80 min · 102 flights · limited
- Fridays69% on time · p90 50 min · 103 flights · limited
- Thursdays66% on time · p90 80 min · 101 flights · limited
- Wednesdays66% on time · p90 90 min · 100 flights · limited
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