Carrier route record

F9LAS→PHL

Frontier Airlines · Las Vegas to Philadelphia

Flights: 113
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 LAS to PHL draws a D+. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 113 flights, with a median arrival 6 minutes late.

The national on-time rate over the same period is 77.6%, so Frontier on LAS to PHL runs 16 points behind the country as a whole. Across a thousand flights that is about 160 extra late arrivals.

On time

61.6%

Arrivals under 15 minutes late, of 112 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

0.88%

National rate is 1.81%

Whole route

83.2%

Every carrier on LAS to PHL, 1,494 flights

These figures cover 113 flights between July 2025 and June 2026. Beyond the headline rate, 9.8% 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 LAS to PHL

Frontier flew 113 of the 1,494 flights on LAS to PHL, about 8% of it. Its 61.6% on time is 22 points worse than the route as a whole, which runs 83.2%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from American at 85.5% to Frontier at 61.6%. 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 LAS to PHL
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines	1,298	85.5%	78 min	1.77%	A
Spirit Airlinesthin sample	83	77.1%	48 min	0.00%	B+
Frontier Airlines (this page)thin sample	113	61.6%	63 min	0.88%	D+

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 113 flights.

There are not enough flights in each departure window to split Frontier's LAS to PHL record by time of day without the percentages moving on noise. The headline rate of 61.6% is the reliable figure here.

Across the year

Frontier on LAS to PHL through the year

Jul–Sep 202543 flights60.5%
Oct–Dec 202515 flights—
Jan–Mar 20265 flights—
Apr–Jun 202650 flights72.0%

Scale runs 50% to 75%. 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 61.6% on time across 113 flights.

Split by quarter, Frontier on LAS to PHL logged 43 flights in Jul–Sep 2025, 15 flights in Oct–Dec 2025, 5 flights in Jan–Mar 2026 and 50 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 61.6% 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 56% of the 2,689 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
56%
Late-arriving aircraft
32%
National Airspace System
11%
Extreme weather
1%

The largest share of delay minutes, 56%, 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 1,508 of the 2,689 delay minutes reported here. The split is drawn from 2,689 reported delay minutes.

Cancellations are rare at 0.88%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

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. 9.8% 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 72.1% on time across 114 flights, 10 points above 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. 113 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 LAS to PHL

Put together: treat all of this as provisional. 113 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 61.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 112 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