Carrier route record

F9ELP→DEN

Frontier Airlines · El Paso to Denver

Flights: 348
Period: September 2025 to August 2026
Share of route: 19%
Carriers: 3

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

Frontier on ELP to DEN lands a B+, level with the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 348 flights. The strongest carrier on the route with a full sample, United Airlines, flew 729 at 84.6% on time.

The US average over the same twelve months is 77.3%, so there is little to separate Frontier on ELP to DEN from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

76.7%

Arrivals under 15 minutes late, of 347 completed flights

Avg delay

87 min

Across delayed arrivals only, not all flights

Cancelled

0.29%

National rate is 1.89%

Whole route

79.8%

Every carrier on ELP to DEN, 1,871 flights

These figures cover 348 flights between September 2025 and August 2026. Beyond the headline rate, 12.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Carrier by carrier

Frontier against every carrier on ELP to DEN

Frontier flew 348 of the 1,871 flights on ELP to DEN, about 19% of it. Its 76.7% on time is 3 points worse than the route as a whole, which runs 79.8%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from United at 84.6% to Frontier at 76.7%.

The choice of carrier is not cosmetic here. United Airlines arrives on time 84.6% of the time; Southwest Airlines manages 76.8%. Sample sizes sit next to every figure, because a two-point gap across 794 flights means less than a ten-point one.

On-time performance by carrier on ELP to DEN
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines	729	84.6%	91 min	0.69%	B+
Southwest Airlines	794	76.8%	64 min	0.25%	B+
Frontier Airlines (this page)thin sample	348	76.7%	87 min	0.29%	B+

United leads Southwest by 8 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Flight by flight

Frontier flight numbers on ELP to DEN

F9 441818:0876.5% · 324 flights

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Departure window

When Frontier 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 8 points between the best and worst carrier.

5am–8am—
8am–11am—
11am–2pm132 flights79.5%
2pm–5pm65 flights84.6%
5pm–8pm148 flights70.1%
8pm–5am3 flights—

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

The best window here is not the first bank but the 2pm–5pm slot at 84.6% on time, ahead of 5pm–8pm at 70.1%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 5pm–8pm window is the busiest, with 148 flights scheduled in it.

Across the year

Frontier on ELP to DEN through the year

Jul–Sep 202525 flights—
Oct–Dec 202587 flights77.0%
Jan–Mar 202688 flights85.1%
Apr–Jun 202686 flights77.9%
Jul–Sep 202662 flights59.7%

Scale runs 50% 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 76.7% on time across 348 flights.

Frontier on ELP to DEN did not run the same all year. Its best quarter was Jan–Mar 2026 at 85.1% on time and its weakest Jul–Sep 2026 at 59.7%, a swing of 25 points on roughly 87 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Saturday is the strongest day at 85.5% on time and Thursday the weakest at 65.4%, a spread of 20 points.

Arrival by arrival

How late Frontier on ELP to DEN runs when it is late

Frontier on ELP to DEN often beats the schedule: 134 of 347 completed flights, 39%, arrived 15 minutes or more early. When Frontier on ELP to DEN is late it tends to be very late: 42 of its 81 late arrivals were an hour or more behind, and 16 were two hours or more.

15+ min early134 flights38.6%
Within 15 min132 flights38.0%
15–29 min late15 flights4.3%
30–59 min late24 flights6.9%
1–2 hours late26 flights7.5%
2+ hours late16 flights4.6%

Scale runs 0% to 100%.

Share of 347 completed flights by arrival against schedule.

10 of 81 late departures made up the time and arrived on time, 12% of them. 10 flights left on time and still arrived late.

The worst days

Worst days for Frontier on ELP to DEN

The latest arrival of the period was on 26 October 2025, 10 hours 23 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across October, March, August and December, with no single month standing out.

The latest arrivals of Frontier on ELP to DEN in the period
Date	Arrived late by	Largest filed cause
26 October 2025	10 hours 23 minutes	Carrier
10 October 2025	6 hours 37 minutes	Carrier
12 March 2026	5 hours 45 minutes	Late-arriving aircraft
13 August 2026	5 hours 18 minutes	National Airspace System
19 December 2025	3 hours 41 minutes	Late-arriving aircraft

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 54% of the 7,046 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
54%
National Airspace System
26%
Carrier
18%
Extreme weather
2%

54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,046 reported delay minutes here, that single category outweighs weather by 29 to one. The split is drawn from 7,046 reported delay minutes.

Cancellations are rare at 0.29%, below the national 1.89% 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

12.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.

The 563 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.

The return leg is a different operation and performs like one: it runs 80.1% on time across 348 flights, 3 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 3 points of difference.

One caution: this is a thin sample. 348 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 ELP to DEN

Put together: treat all of this as provisional. 348 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 76.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 347 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures