Historical on-time performance
Salt Lake City to Philadelphia
Flights on SLC–PHL arrive on time 81% of the time over the last 12 months.
based on 777 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- American AirlinesOn-time84%Medianon timep9020 minCancel5.2%Flights153
- Delta Air LinesOn-time80%Medianon timep9025 minCancel1.3%Flights624
Why flights run late
Delay causes
- Airline60%
- Weather0%
- Air traffic (NAS)22%
- Late aircraft17%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline19%
- Weather75%
- Air traffic (NAS)6%
- 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 SLC → PHL
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 74% to 90% on time.
- Mornings90% on time · p90 5 min · 168 flights · limited
- Evenings88% on time · p90 15 min · 136 flights · limited
- Middays80% on time · p90 30 min · 1,071 flights
- Overnights74% on time · p90 30 min · 740 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 85% on time.
- Tuesdays85% on time · p90 20 min · 254 flights
- Wednesdays82% on time · p90 20 min · 268 flights
- Fridays81% on time · p90 25 min · 345 flights
- Mondays80% on time · p90 25 min · 337 flights
- Saturdays79% on time · p90 25 min · 261 flights
- Thursdays76% on time · p90 35 min · 343 flights
- Sundays74% on time · p90 30 min · 338 flights
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