Carrier route record

AALAS→PHL

American Airlines · Las Vegas to Philadelphia

Flights: 1,298
Period: July 2025 to June 2026
Share of route: 87%
Carriers: 3

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with American Airlines.

American on LAS to PHL earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 1,298 flights, with a median arrival 16 minutes early.

Set against the rest of the country, American's LAS to PHL record is 8 points better than the US average of 77.6%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.

On time

85.5%

Arrivals under 15 minutes late, of 1,269 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

1.77%

National rate is 1.81%

Whole route

83.2%

Every carrier on LAS to PHL, 1,494 flights

These figures cover 1,298 flights between July 2025 and June 2026. The median arrival is 16 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Carrier by carrier

American against every carrier on LAS to PHL

American flew 1,298 of the 1,494 flights on LAS to PHL, most of the route. Its 85.5% on time is 2 points better than the route as a whole, which runs 83.2%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from American at 85.5% to Frontier at 61.6%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on LAS to PHL
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines (this page)	1,298	85.5%	78 min	1.77%	A
Spirit Airlinesthin sample	83	77.1%	48 min	0.00%	B+
Frontier Airlinesthin sample	113	61.6%	63 min	0.88%	D+

Departure window

When American runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am156 flights91.4%
8am–11am434 flights83.5%
11am–2pm205 flights80.2%
2pm–5pm34 flights76.5%
5pm–8pm—
8pm–5am469 flights88.4%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.4% of the time, against 76.5% for the afternoon window. That is 15 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 469 flights scheduled in it.

Across the year

American on LAS to PHL through the year

Darker means more delays. Figures are on-time percentages.April best, July worst

July is the worst month at 73.4% on time, 18 points below April, the best at 91.2%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. October was the busiest month here, with 146 flights.

Across the week, Tuesday is the strongest day at 88.4% on time and Sunday the weakest at 78.5%. 10 points is a smaller lever than departure hour, but it is free.

Delay causes

Why American runs late on this route

One category carries most of the weight here. Carrier accounts for 46% of the 14,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
46%
Late-arriving aircraft
35%
National Airspace System
16%
Extreme weather
2%

35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 14,000 reported delay minutes here, that single category outweighs weather by 16 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 14,318 reported delay minutes.

The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 6,624 of the 14,000 delay minutes reported here.

Cancellations sit at 1.77% against a national 1.81%, which is ordinary. Diversions add another 0.46%.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 4.3% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 2,177 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The return leg is a different operation and performs like one: it runs 75.3% on time across 1,293 flights, 10 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 10 points of difference.

The sample behind these figures is 1,298 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.

What to do with this

Booking American on LAS to PHL

Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 91.2% on time and July 73.4%, a swing of 18 points. If the dates move at all, move them out of July before you think about anything else. 1,269 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures