82% of flights from Salt Lake City to Philadelphia arrived on time over the past 12 months. That is about the typical U.S. route. The 11 a.m. departures ran on time 82% of the time; the 11 p.m. ones 80%. Most reliable airline: American Airlines (82%). 7% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for SLC → PHL: when a flight was late, it was under 45 minutes late 60% of the time. About 1 in 20 flights landed an hour or more late, and 1 in 67 three hours or more; 2.0% were cancelled outright.
- On time or early82%
- 15–30 min late6.1%
- 30–60 min late4.7%
- 1–2 hours late2.5%
- 2–3 hours late1.0%
- 3+ hours late1.5%
- Diverted0.4%
- Cancelled2.0%
Share of all 805 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Delta Air Lines | 591 | 82% | 1.0% | −6 min | 4.2% | +55 min | Delta Air Lines |
| American Airlines | 214 | 82% | 4.7% | −19 min | 7.0% | +208 min | American Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at SLC). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | Delta Air Lines | American Airlines |
|---|---|---|
| 7 a.m. | — | 81% |
| 11 a.m. | 82% | — |
| 11 p.m. | 80% | — |
Last flight of the day
On SLC → PHL, each airline's last flight of the day was cancelled 1.8% of the time, against 0.9% for its earlier flights (2.0× as often). It arrived 3+ hours late 0.9% of the time (earlier flights: 0.0%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| Delta Air Lines | 11:51 p.m. | 1.8% | 0.9% | 0.9% | first flight 11:20 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
If you need to be in PHL tonight, book an earlier flight so there's a backup if it's cancelled.
By month
Each calendar month pooled over 2023–2026. Best: October (87%). Worst: July (70%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 135 | 78% | 0.7% |
| Tuesday | 98 | — | — |
| Wednesday | 94 | — | — |
| Thursday | 128 | 77% | 1.6% |
| Friday | 130 | 86% | 1.5% |
| Saturday | 91 | — | — |
| Sunday | 129 | 76% | 4.7% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 11 · airline 4 · air traffic/airport 1
Month by month
Not enough months with data to draw a trend.
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| DL 2022 | 11:25 a.m. | 322 | 83% | 0.3% | −6 min | Delta Air Lines |
| DL 2075 | 11:59 p.m. | 245 | 81% | 1.6% | −5 min | Delta Air Lines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Feb 22, 2026 | 3 | 0% | 3 |
| Aug 3, 2026 | 3 | 33% | 0 |
| Apr 2, 2026 | 3 | 33% | 0 |
| Mar 17, 2026 | 3 | 33% | 1 |
| Dec 27, 2025 | 3 | 33% | 1 |
Questions
How often are flights from SLC to PHL on time?
82% of 805 scheduled flights from Salt Lake City, UT to Philadelphia, PA arrived within 15 minutes of schedule between September 2025 and August 2026. 2.0% were cancelled.
What is the best time of day to fly SLC to PHL?
Flights scheduled to leave at 11 a.m. were the most reliable (82% on time). The 11 p.m. departures were the least (80%).
Which airline is most on time from SLC to PHL?
American Airlines: 82% of its 214 flights on the route arrived on time. Delta Air Lines: 82%.
What month has the most delays from SLC to PHL?
July (70% on time). The best month is October (87%), over 2023–2026.
Is the last flight of the day from SLC to PHL more likely to be cancelled?
Yes. Each airline's last SLC–PHL flight of the day was cancelled 1.8% of the time over the past year, against 0.9% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- PHL → SLC (return)
- Salt Lake City (SLC) delays by hour
- Flights into Philadelphia (PHL)
- Delta Air Lines on-time record
- American Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.