SLC to PHL flight delays & on-time performance
Nonstop flights from Salt Lake City International Airport to Philadelphia International Airport · 1,927 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SLC or PHL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Salt Lake City (SLC) to Philadelphia (PHL) arrived on time 85% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.1% were cancelled, and 5% arrived an hour or more late.
- American Airlines was the most punctual airline here (88% on time); Delta Air Lines was the least (83%).
- Departures scheduled around 6am did best (100% on time); around 10am did worst (80%).
- Tuesday was the most reliable day to fly (92% on time) and Thursday the least (77%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (54%).
Which airline is most on time from SLC to PHL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 88% | 5.0% | 18 min | 6.3% | 220 |
| Delta Air Lines | 83% | 1.0% | 10 min | 4.1% | 598 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am100%46 flights
- 7am85%79 flights
- 8am93%44 flights
- 9am90%21 flights
- 10am80%52 flights
- 11am84%318 flights
- 5pm89%59 flights
- 11pm80%199 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%1.5% cancelled
- Tuesday92%2.0% cancelled
- Wednesday92%2.0% cancelled
- Thursday77%1.6% cancelled
- Friday88%1.5% cancelled
- Saturday87%1.1% cancelled
- Sunday80%4.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)54%
- Late-arriving aircraft23%
- Air traffic control & airport congestion22%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather71%
- Airline (crew, maintenance, cleaning, fueling)24%
- Air traffic control & airport congestion6%
- Security0%
SLC to PHL: common questions
- How often are SLC to PHL flights on time?
- 85% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Salt Lake City to Philadelphia cancelled?
- 2.1% of scheduled flights were cancelled (17 of 818).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 74 min behind schedule on average, and 4.6% of flights were an hour or more late.
- How long is taxi time at SLC?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PHL to SLC — 78% on time
More flights from Salt Lake City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SLC → PHL, nonstop flights by US airlines that report to the DOT. How we calculate this.