Historical on-time performance
Philadelphia to Des Moines
973 miData through May 2026Source: US DOT · BTS
Flights on PHL–DSM arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay90 min1 in 10 flights is worse (tail risk)
Cancelled3.4%of scheduled flights
based on 262 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- PSA AirlinesOn-time69%Medianon timep9090 minCancel3.4%Flights262
Why flights run late
Delay causes
- Airline30%
- Weather3%
- Air traffic (NAS)22%
- Late aircraft44%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather89%
- Air traffic (NAS)11%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 9 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 PHL → DSM
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 — 84% on time.
- Middays84% on time · p90 40 min · 161 flights · limited
- Evenings60% on time · p90 120 min · 154 flights · limited
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