Salt Lake City (SLC) to Philadelphia (PHL): On-Time Performance
Data through May 2026
When you fly SLC to PHL matters as much as anything else about the booking: the route swung from 91% on-time in May 2026 to just 69% in July 2024. Across the full period the route averages 83% on-time against a national 78%.
- On-time
- 83%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 2.3%
- Flights/day
- 2.3
- last 12 months
- Duration
- 4h 14m
- scheduled
- Distance
- 1,927 mi
Best airline from SLC to PHL
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| American Airlinesmost reliable | 84% | 18 min | 5.6% | 338 |
| Delta Air Lines | 83% | 10 min | 1.4% | 1,204 |
Monthly on-time trend
Best time to fly from SLC to PHL
Aim for departures around 6 a.m. (93% on-time); avoid 11 p.m. departures (78%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 83% | 11 min |
| Tuesdaybest | 88% | 6 min |
| Wednesday | 85% | 12 min |
| Thursday | 80% | 15 min |
| Friday | 83% | 10 min |
| Saturday | 84% | 10 min |
| Sunday | 79% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft30%
- Airline operations49%
- National airspace system20%
- Weather1%
Frequently asked questions
- How often are flights from SLC to PHL delayed?
- 17% of SLC–PHL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 11 minutes.
- Which airline is most reliable from SLC to PHL?
- American Airlines has the best on-time record on this route at 84%, based on 338 flights. 2 airlines flew SLC–PHL frequently enough to compare in this period.
- What is the best time of day to fly from SLC to PHL?
- Departures around 6 a.m. have the best record (93% on-time), while departures around 11 p.m. have the worst (78%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SLC to PHL?
- The scheduled SLC–PHL flight time averages 4h 14m over 1,927 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
- How often are SLC to PHL flights cancelled?
- 2.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from SLC to PHL?
- July 2024 was the roughest month in this dataset, with only 69% of arrivals on time. The best was May 2026 at 91%. If your dates are flexible, that 22-point gap is worth planning around.
Explore related pages
More routes from SLC
Other ways to fly to Philadelphia (PHL)
Related guides
Based on 1,542 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.