Route on-time record
SLC to PHL: most on-time flights and the best time to fly
Salt Lake City (Salt Lake City International Airport) to Philadelphia (Philadelphia International Airport). 840 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 2.4% were cancelled. The most reliable flight number was American 3057 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SLC → PHL
Salt Lake City to Philadelphia: 840 nonstop flights a year
On time (12 months)
84%
Cancelled
2.4%
avg delay 12 min
Best time to leave
Before 9 AM
97% on time vs 80% after 9 PM
Most reliable airline
American
85% 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 · American 3057
7:00 AM → 1:22 PM4h 22m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; After 9 PM: 80%).
Limited track record · 11 flights
Find American 3057 fares Opens this date on Aviasales#2 · American 2671
8:00 AM → 2:23 PM4h 23m nonstop
Local times, typical schedule. Last flown 2026-05-20.
88%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 93% of the time (43 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; After 9 PM: 80%).
- Lands inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 43 flights
Find American 2671 fares Opens this date on Aviasales#3 · Delta 2022
11:35 AM → 5:42 PM4h 08m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.3%
- Avg arrival delay
- 9 min
- Arrived on time 84% of the time (318 flights, Jun 2025 to May 2026).
- Lands inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 318 flights
Find Delta 2022 fares Opens this date on Aviasales#4 · Delta 2075
11:30 PM → 5:41 AM4h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 80%
- Cancelled
- 2.2%
- Avg arrival delay
- 10 min
- Arrived on time 80% of the time (272 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (After 9 PM: 80% on time; Before 9 AM: 97%).
Strong track record · 272 flights
Find Delta 2075 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines85%
216 flights · 90% on time as flown · 4.3% cancel
- Delta Air Lines81%
624 flights · 82% on time as flown · 1.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM97%
108 flights · avg delay 1 min
- 9 AM to noon82%
391 flights · avg delay 14 min
- 3 to 6 PM89%
59 flights · avg delay 11 min
- After 9 PM80%
282 flights · avg delay 12 min
Best day: Tuesday (87%). Worst: Thursday (77%).
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
- Airline (crew, maintenance, boarding)59%
- Air traffic control and airport volume22%
- Late-arriving aircraft20%
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
SLC to PHL questions
- What time of day is best to fly SLC to PHL?
- Before 9 AM: 97% of flights arrived on time, against 80% for departures after 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 SLC to PHL?
- American, with a season-adjusted 85% chance of operating and arriving on time over 216 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 SLC to PHL?
- July (72% on time); the best was February (88%), 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 SLC
- PHL to SLC (return)
- SLC to DEN 77%
- SLC to PHX 84%
- SLC to SEA 79%
- SLC to LAX 86%
- SLC to DFW 78%
- SLC to LAS 78%
- SLC to SFO 72%
- SLC to ORD 75%
- SLC to ATL 86%
- SLC to SAN 84%
- SLC to PDX 88%
- SLC to SMF 86%
Most on-time flights from SLC on every route →
Live status: FAA delays and ground stops