Route profile
LAS→PHL
Flight reliability, delays and best times to fly from Las Vegas to Philadelphia, 2,176 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 59% of comparable major US routes (4,598 compared)
Calculated from 5,013 flights. How this is calculated · What counts as on time
LAS → PHL arrives on time 80.5% of the time; the return trip, PHL → LAS, arrives on time 74.4% of the time, a 6.2-point gap between the two directions of the same city pair.
LAS → PHL spends 28.3 minutes on the ground on a 2,176-mile trip: 18.5 minutes from pushback to wheels-up at LAS and 9.8 minutes from touchdown to gate at PHL.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
This route has stayed remarkably steady year over year, a smaller swing than 98% of 5,368 comparable routes.
81.7% on time over the most recent 12 months (2025-08 to 2026-07), against 81.6% in the 12 months before (2024-08 to 2025-07), virtually unchanged.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 5,368 in the comparison.
What sets this route apart
Where LAS to PHL differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
LAS to PHL struggles most at 11 AM: 67.6% of its flights scheduled then arrive on time, 11.2 points behind the 78.8% on routes of similar length at the same hour. Against all other routes the gap is 13.4 points.
LAS to PHL is at its best against routes of similar length for flights scheduled at 11 PM: 85.2% arrive on time, 4.3 points ahead of the 80.9% those routes manage at that hour. Against all other routes the gap is 6.1 points.
February is kinder to LAS to PHL than to routes of similar length: 91.0% on time against 81.5%, 9.5 points better. Against all other routes the gap is 9.6 points.
In July, LAS to PHL runs 7.2 points below routes of similar length, 63.3% on time to 70.5%. Against all other routes the gap is 6.4 points.
American Airlines does better on LAS to PHL than on its routes of similar length: 82.6% on time here, 78.6% there, 4 points apart. Against all other routes the gap is 7.5 points.
LAS to PHL against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 11 AM departures | 67.6% | routes of similar length | 78.8% | −11.2 pts | 352 here, 59,520 there |
| Hour: 11 PM departures | 85.2% | routes of similar length | 80.9% | +4.3 pts | 908 here, 63,789 there |
| Month: February | 91.0% | routes of similar length | 81.5% | +9.5 pts | 289 here, 72,771 there |
| Month: July | 63.3% | routes of similar length | 70.5% | −7.2 pts | 602 here, 130,985 there |
| Airline: American Airlines | 82.6% | routes of similar length | 78.6% | +4.0 pts | 3,631 here, 232,965 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 2,176 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why LAS → PHL flights are cancelled
July 2023 – July 2026
LAS → PHL cancelled 74 of 5,013 scheduled flights — about 1 in every 68. The reason filed most often was extreme weather, 77.0% of the cancellations coded on this route — about 1 in every 88 scheduled flights.
Share of cancellations
Of 74 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
57 cancellations, 77.0% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
13 cancellations, 17.6% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
4 cancellations, 5.4% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
74 coded cancellations were recorded on LAS → PHL; the section appears from 50.
When it goes wrong
July 2023 – July 2026
37 min late
against a median of 9 min early
Percentiles over 5,013 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at PHL after arriving from LAS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 34% | Likely to miss |
| 45 min | 19% | High risk |
| 60 min | 12% | Some risk |
| 90 min | 5.8% | Some risk |
| 120 min | 3.7% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.48% of the time and diverts 0.60% of the time, which a late arrival never shows up in.
Chance of missing is the share of 4,909 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 37 minutes late (90th-percentile gate arrival delay), over 5,013 operations.
Any other layover length: connection checker.
Best time to fly
LAS → PHL flights departing 5–9 AM arrived on time 87.1% of the time, against 74.0% for 9 AM–12 PM departures, a gap of 13.1 percentage points.
By departure window
By departure hour
- 12 AM to 5 AM: too few flights to score
- 6 AM: 93.5% on time from 330 flights
- 7 AM: 84.6% on time from 295 flights
- 8 AM: 79.9% on time from 193 flights
- 9 AM: 75.7% on time from 430 flights
- 10 AM: 78.0% on time from 383 flights
- 11 AM: 67.6% on time from 363 flights
- 12 PM: 78.7% on time from 281 flights
- 1 PM to 8 PM: too few flights to score
- 9 PM: 72.1% on time from 251 flights
- 10 PM: 78.6% on time from 1,166 flights
- 11 PM: 85.2% on time from 933 flights
Departure windows with fewer than 120 flights are not scored.
Why LAS → PHL runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for LAS → PHL. Only delays of 15 minutes or more are attributed. What the five causes mean
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| American Airlines | 3,713 | 82.6% | 1.40% | -11 min | 5.4% |
| Spirit Airlines | 797 | 81.2% | 1.76% | -6 min | 3.6% |
| Frontier Airlines | 503 | 64.4% | 1.59% | 4 min | 13.1% |
American Airlines flew 74.1% of the 5,013 flights listed.
American Airlines arrived on time 18.2 percentage points more often than Frontier Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| AA437 American Airlines | 9:51 AM | 785 | 83.3% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Thursday the least, a gap of 8.4 percentage points.
By month
- Jan: 87.5%
- Feb: 91.0%
- Mar: 86.8%
- Apr: 86.9%
- May: 81.1%
- Jun: 70.5%
- Jul: 63.3%
- Aug: 73.3%
- Sep: 81.1%
- Oct: 86.2%
- Nov: 87.9%
- Dec: 86.3%
July is historically the weakest month and February the strongest, a spread of 27.7 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 70.1% from 154 flights
- August 2023: 70.7% from 153 flights
- September 2023: 79.2% from 170 flights
- October 2023: 87.4% from 127 flights
- November 2023: too few flights to score (111)
- December 2023: too few flights to score (85)
- January 2024: too few flights to score (92)
- February 2024: too few flights to score (98)
- March 2024: too few flights to score (114)
- April 2024: 95.8% from 120 flights
- May 2024: 74.1% from 135 flights
- June 2024: 58.4% from 149 flights
- July 2024: 61.3% from 180 flights
- August 2024: 70.5% from 130 flights
- September 2024: 83.3% from 168 flights
- October 2024: 83.0% from 159 flights
- November 2024: 91.3% from 138 flights
- December 2024: 88.4% from 139 flights
- January 2025: 89.0% from 129 flights
- February 2025: too few flights to score (119)
- March 2025: 87.3% from 147 flights
- April 2025: 79.6% from 192 flights
- May 2025: 80.2% from 213 flights
- June 2025: 71.5% from 148 flights
- July 2025: 68.1% from 155 flights
- August 2025: 78.3% from 153 flights
- September 2025: 80.6% from 124 flights
- October 2025: 88.4% from 164 flights
- November 2025: too few flights to score (92)
- December 2025: too few flights to score (100)
- January 2026: too few flights to score (85)
- February 2026: too few flights to score (79)
- March 2026: too few flights to score (93)
- April 2026: 88.9% from 153 flights
- May 2026: 88.7% from 153 flights
- June 2026: 81.4% from 143 flights
- July 2026: 53.8% from 149 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 81.7% against 81.6% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 5,013 LAS → PHL flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed