Route on-time record
LAS to PHL: most on-time flights and the best time to fly
Las Vegas (Harry Reid International Airport) to Philadelphia (Philadelphia International Airport). 1,499 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 1.7% were cancelled. The most reliable flight number was American 3161 at 1:00 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
LAS → PHL
Las Vegas to Philadelphia: 1,499 nonstop flights a year
On time (12 months)
82%
Cancelled
1.7%
avg delay 15 min
Best time to leave
Before 9 AM
90% on time vs 79% 9 AM to noon
Most reliable airline
American
83% chance on time
Lowest nonstop fare seen in the next two months: $161 (Frontier 1602 on 2026-10-26). 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 3161
1:00 PM → 8:56 PM4h 56m nonstop
Local times, typical schedule. Last flown 2026-05-20.
88%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 93% of the time (43 flights, Jun 2025 to May 2026).
- Never cancelled in 43 scheduled flights.
- Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
Limited track record · 43 flights
Find American 3161 fares Opens this date on Aviasales#2 · American 1121
10:29 PM → 6:19 AM4h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
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).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
Limited track record · 11 flights
Find American 1121 fares Opens this date on Aviasales#3 · American 437
10:00 PM → 5:45 AM4h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 86%
- Cancelled
- 2.4%
- Avg arrival delay
- 11 min
- Arrived on time 86% of the time (200 flights, Jun 2025 to May 2026).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
Strong track record · 200 flights
Find American 437 fares Opens this date on Aviasales#4 · American 3021
8:20 AM → 4:14 PM4h 54m nonstop
Local times, typical schedule. Last flown 2026-05-19.
82%
chance on time
- On time (history)
- 83%
- Cancelled
- 0.9%
- Avg arrival delay
- 13 min
- Arrived on time 83% of the time (105 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 9 AM to noon: 79%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
- Lands inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 105 flights
Find American 3021 fares Opens this date on Aviasales#5 · American 1543
11:18 PM → 7:02 AM4h 44m nonstop
Local times, typical schedule. Last flown 2026-05-19.
82%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 84% of the time (43 flights, Jun 2025 to May 2026).
- Never cancelled in 43 scheduled flights.
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
Limited track record · 43 flights
Find American 1543 fares Opens this date on Aviasales#6 · American 1804
12:37 PM → 8:40 PM5h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 16 min
- Arrived on time 78% of the time (9 flights, Jun 2025 to May 2026).
- Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
- 54% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 9 flights
Find American 1804 fares Opens this date on Aviasales#7 · American 779
10:49 AM → 6:46 PM4h 57m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 76%
- Cancelled
- 1.1%
- Avg arrival delay
- 21 min
- Arrived on time 76% of the time (172 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (9 AM to noon: 79% on time; Before 9 AM: 90%).
- Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
- Lands inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 172 flights
Find American 779 fares Opens this date on Aviasales#8 · Frontier 1602
9:27 PM → 5:13 AM4h 47m nonstop
Local times, typical schedule. Last flown 2026-05-31.
62%
chance on time
- On time (history)
- 60%
- Cancelled
- 1.8%
- Avg arrival delay
- 29 min
- Arrived on time 60% of the time (108 flights, Jun 2025 to May 2026).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
Moderate track record · 108 flights
Find Frontier 1602 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines83%
1,276 flights · 85% on time as flown · 1.9% cancel
- Frontier Airlines69%
110 flights · 60% on time as flown · 1.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
245 flights · avg delay 12 min
- 9 AM to noon79%
407 flights · avg delay 19 min
- Noon to 3 PM81%
211 flights · avg delay 13 min
- After 9 PM82%
614 flights · avg delay 13 min
Best day: Tuesday (86%). 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)47%
- Late-arriving aircraft32%
- Air traffic control and airport volume17%
- Severe weather4%
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
LAS to PHL questions
- What time of day is best to fly LAS to PHL?
- Before 9 AM: 90% of flights arrived on time, against 79% for departures 9 AM to noon. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from LAS to PHL?
- American, with a season-adjusted 83% chance of operating and arriving on time over 1,276 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 LAS to PHL?
- June (65% on time); the best was February (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 LAS
- PHL to LAS (return)
- LAS to LAX 79%
- LAS to DEN 77%
- LAS to SAN 68%
- LAS to PHX 78%
- LAS to SFO 66%
- LAS to SEA 82%
- LAS to ORD 77%
- LAS to DFW 81%
- LAS to ATL 84%
- LAS to SNA 82%
- LAS to SMF 79%
- LAS to BUR 80%
Most on-time flights from LAS on every route →
Live status: FAA delays and ground stops