Historical on-time performance
Waterloo to Chicago
234 miData through May 2026Source: US DOT · BTS
Flights on ALO–ORD arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled2.3%of scheduled flights
based on 663 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 timep9070 minCancel2.3%Flights663
Why flights run late
Delay causes
- Airline24%
- Weather26%
- Air traffic (NAS)17%
- Late aircraft33%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather80%
- Air traffic (NAS)20%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 15 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 ALO → ORD
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 — 80% on time.
- Mornings80% on time · p90 60 min · 360 flights
- Afternoons59% on time · p90 80 min · 303 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 65% to 73% on time.
- Wednesdays73% on time · p90 90 min · 100 flights · limited
- Fridays69% on time · p90 60 min · 103 flights · limited
- Thursdays67% on time · p90 90 min · 100 flights · limited
- Sundays65% on time · p90 100 min · 104 flights · limited
- Mondays65% on time · p90 50 min · 102 flights · limited
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