Route
SLC → PHL
Salt Lake City International Airport Philadelphia International Airport
1,927 miles
Return route PHL → SLC →
How punctual is this route?
- On-time arrivals
- 83.8%
- Less than 15 minutes late
- Cancelled
- 2.0%
- Of scheduled flights
- Average delay when late
- 94 min
- Flights arriving 15+ minutes late
- Flights tracked
- 805
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 59%
- Air traffic control & airport 21%
- Late-arriving aircraft 19%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.8% | 49 |
| October 2025 | 83.3% | 48 |
| November 2025 | 72.7% | 44 |
| December 2025 | 80.3% | 62 |
| January 2026 | 81.2% | 50 |
| February 2026 | 85.5% | 67 |
| March 2026 | 80.7% | 89 |
| April 2026 | 88.5% | 88 |
| May 2026 | 91.4% | 82 |
| June 2026 | 87.8% | 76 |
| July 2026 | 78.1% | 77 |
| August 2026 | 81.7% | 73 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Delta Air Lines | 591 | 82.8% | 1.0% | 63 min |
| American Airlines | 214 | 86.7% | 4.7% | 211 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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