Historical on-time performance
Philadelphia to Salt Lake City
Flights on PHL–SLC arrive on time 75% of the time over the last 12 months.
based on 778 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.
- Delta Air LinesOn-time77%Medianon timep9030 minCancel1.4%Flights624
- American AirlinesOn-time67%Medianon timep9055 minCancel5.2%Flights154
Why flights run late
Delay causes
- Airline34%
- Weather5%
- Air traffic (NAS)32%
- Late aircraft28%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline24%
- Weather71%
- Air traffic (NAS)6%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 17 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 → SLC
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 — 83% on time.
- Mornings83% on time · p90 25 min · 1,072 flights
- Evenings69% on time · p90 60 min · 1,001 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 78% on time.
- Wednesdays78% on time · p90 35 min · 261 flights
- Fridays77% on time · p90 30 min · 346 flights
- Tuesdays77% on time · p90 30 min · 254 flights
- Thursdays76% on time · p90 45 min · 344 flights
- Mondays76% on time · p90 50 min · 341 flights
- Sundays75% on time · p90 40 min · 330 flights
- Saturdays71% on time · p90 50 min · 269 flights
Keep exploring