Carrier route record

F9PHL→LAS

Frontier Airlines · Philadelphia to Las Vegas

Flights: 114
Period: July 2025 to June 2026
Share of route: 8%
Carriers: 3

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

Frontier on PHL to LAS sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land close to two hours behind schedule. That rests on 114 flights, with a median arrival 5 minutes early.

The national on-time rate over the same period is 77.6%, so Frontier on PHL to LAS runs 6 points behind the country as a whole. Across a thousand flights that is about 55 extra late arrivals.

On time

72.1%

Arrivals under 15 minutes late, of 111 completed flights

Avg delay

103 min

Across delayed arrivals only, not all flights

Cancelled

1.75%

National rate is 1.81%

Whole route

75.4%

Every carrier on PHL to LAS, 1,489 flights

These figures cover 114 flights between July 2025 and June 2026. Beyond the headline rate, 15.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

Frontier against every carrier on PHL to LAS

Frontier flew 114 of the 1,489 flights on PHL to LAS, about 8% of it. Its 72.1% on time is 3 points worse than the route as a whole, which runs 75.4%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Spirit at 81.5% to Frontier at 72.1%. One 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 PHL to LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	82	81.5%	68 min	1.22%	B
American Airlines	1,293	75.3%	75 min	1.78%	B
Frontier Airlines (this page)thin sample	114	72.1%	103 min	1.75%	C

Departure window

When Frontier runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 114 flights.

There are not enough flights in each departure window to split Frontier's PHL to LAS record by time of day without the percentages moving on noise. The headline rate of 72.1% is the reliable figure here.

Across the year

Frontier on PHL to LAS through the year

Jul–Sep 202543 flights83.7%
Oct–Dec 202514 flights—
Jan–Mar 20265 flights—
Apr–Jun 202652 flights75.0%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 72.1% on time across 114 flights.

Split by quarter, Frontier on PHL to LAS logged 43 flights in Jul–Sep 2025, 14 flights in Oct–Dec 2025, 5 flights in Jan–Mar 2026 and 52 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 72.1% annual figure is the one to use.

Delay causes

Why Frontier runs late on this route

One category carries most of the weight here. Carrier accounts for 42% of the 3,178 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
42%
Late-arriving aircraft
42%
National Airspace System
15%
Extreme weather
1%

42% 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 3,178 reported delay minutes here, that single category outweighs weather by 42 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 3,178 reported delay minutes.

The largest share of delay minutes, 42%, 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 1,343 of the 3,178 delay minutes reported here.

Cancellations sit at 1.75% against a national 1.81%, which is ordinary. Diversions add another 0.88%.

Connections and stage length

What a delay here costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

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 61.6% on time across 113 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.

One caution: this is a thin sample. 114 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking Frontier on PHL to LAS

Put together: treat all of this as provisional. 114 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 72.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 111 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