Route on-time record
PHL to SLC: most on-time flights and the best time to fly
Philadelphia (Philadelphia International Airport) to Salt Lake City (Salt Lake City International Airport). 840 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 2.5% were cancelled. The most reliable flight number was Delta 2023 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PHL → SLC
Philadelphia to Salt Lake City: 840 nonstop flights a year
On time (12 months)
76%
Cancelled
2.5%
avg delay 14 min
Best time to leave
Before 9 AM
84% on time vs 70% 6 to 9 PM
Most reliable airline
Delta
77% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Delta 2023
7:00 AM → 10:05 AM4h 59m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 84%
- Cancelled
- 1.9%
- Avg arrival delay
- 9 min
- Arrived on time 84% of the time (357 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 6 to 9 PM: 70%).
- Departs outside PHL's trouble window (2 PM to 8 PM, when 72% of its 95 ground stops and delay programs started).
Strong track record · 357 flights
Find Delta 2023 fares Opens this date on Aviasales#2 · Delta 2029
6:45 PM → 9:42 PM4h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 86% of the time (14 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 70% on time; Before 9 AM: 84%).
- Departs inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 14 flights
Find Delta 2029 fares Opens this date on Aviasales#3 · American 2668
7:35 PM → 10:50 PM5h 15m nonstop
Local times, typical schedule. Last flown 2026-05-20.
72%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 86% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 70% on time; Before 9 AM: 84%).
- Departs inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 44 flights
Find American 2668 fares Opens this date on Aviasales#4 · American 2610
7:48 PM → 11:02 PM5h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31.
67%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 70% on time; Before 9 AM: 84%).
- Departs inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 11 flights
Find American 2610 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines77%
624 flights · 78% on time as flown · 1.6% cancel
- American Airlines70%
216 flights · 72% on time as flown · 4.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM84%
364 flights · avg delay 9 min
- 6 to 9 PM70%
446 flights · avg delay 19 min
Best day: Wednesday (79%). Worst: Saturday (73%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Air traffic control and airport volume33%
- Airline (crew, maintenance, boarding)33%
- Late-arriving aircraft28%
- Severe weather5%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
PHL to SLC questions
- What time of day is best to fly PHL to SLC?
- Before 9 AM: 84% of flights arrived on time, against 70% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from PHL to SLC?
- Delta, with a season-adjusted 77% chance of operating and arriving on time over 624 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on PHL to SLC?
- July (57% on time); the best was October (91%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from PHL
- SLC to PHL (return)
- PHL to ATL 78%
- PHL to MCO 72%
- PHL to BOS 75%
- PHL to ORD 72%
- PHL to CLT 80%
- PHL to DFW 77%
- PHL to FLL 72%
- PHL to MIA 77%
- PHL to DEN 76%
- PHL to DTW 80%
- PHL to BNA 75%
- PHL to TPA 73%
Most on-time flights from PHL on every route →
Live status: FAA delays and ground stops