Route reliability record
ELP→DEN
El Paso to Denver
- Flights
- 1,848
- Period
- July 2025 to June 2026
- Distance
- 563 mi
- Carriers
- 4
This route lands a B+, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 1,848 ELP to DEN flights, of which United Airlines flew 698 at 83.5% on time.
Best time to fly ELP to DEN: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 93.0% of the time and Tuesday flights 84.5%, against 79.2% for the route overall.
The US average over the same twelve months is 77.6%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.2%
Arrivals under 15 minutes late, of 1,838 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
0.43%
National rate is 1.81%
Best carrier
United
83.5% on time across 698 flights
These figures cover 1,848 flights between July 2025 and June 2026. Beyond the headline rate, 8.5% 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
Which airline is most reliable on ELP to DEN
The choice of carrier is not cosmetic here. United Airlines arrives on time 83.5% of the time; Southwest Airlines manages 76.6%. Sample sizes sit next to every figure, because a two-point gap across 780 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 698 | 83.5% | 82 min | 0.72% | B+ |
| Frontier Airlinesthin sample | 339 | 78.6% | 90 min | 0.59% | B+ |
| Southwest Airlines | 780 | 76.6% | 66 min | 0.00% | B+ |
| SkyWest Airlinesthin sample | 31 | 53.3% | 77 min | 3.23% | F− |
United leads Southwest by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
Flights on ELP to DEN
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
Best ways to make this trip
The most reliable ways to fly El Paso to Denver
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. ELP → DENEl Paso to Denver | United Airlines | 82.9% | 83.5% | 0.72% | 5am–8am, Tue | UA 724 07:00 |
| 2. ELP → DENEl Paso to Denver | Southwest Airlines | 76.6% | 76.6% | 0.00% | 5am–8am, Tue | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 points, against 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am711 flights93.0%
- 8am–11am47 flights80.9%
- 11am–2pm222 flights78.7%
- 2pm–5pm545 flights67.3%
- 5pm–8pm268 flights66.9%
- 8pm–5am55 flights80.0%
Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.0% of the time, against 66.9% for the evening window. That is 26 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 711 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 25 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
July is the worst month at 65.9% on time, 25 points below January, the best at 90.7%. 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. June was the busiest month here, with 173 flights.
Across the week, Tuesday is the strongest day at 84.5% on time and Thursday the weakest at 73.9%. 11 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 29,000 reported delay minutes.
- 39%Late-arriving aircraft
- 28%Carrier
- 27%National Airspace System
- 6%Extreme weather
- 0%Security
39% 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 29,000 reported delay minutes here, that single category outweighs weather by 7 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 28,903 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.0% on time here.
Cancellations are rare at 0.43%, 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 actually costs
8.5% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 75.0% on time across 1,849 flights, 4 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 4 points of difference.
The sample behind these figures is 1,848 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.
Work out the risk of missing a connection in DEN after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. January runs 90.7% on time and July 65.9%, a swing of 25 points. If the dates move at all, move them out of July before you think about anything else. 1,838 completed flights over 12 months sit behind that.
Common questions
ELP to DEN questions
How often is ELP to DEN delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 20.8% of the 1,848 flights in this analysis, against 22.4% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on ELP to DEN?
United Airlines leads at 83.5% on time across 698 flights. Southwest Airlines is at the other end on 76.6%, a gap of 7 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on ELP to DEN?
The 5am–8am departure window is the strongest at 93.0% on time. The 5pm–8pm window is the weakest at 66.9%, 26 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on ELP to DEN?
July is the weakest month at 65.9% on time, compared with 90.7% in January. Across the year that is 25 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- DEN to ELP — the return legseparate record
- Denver International (DEN) delay statistics
- United Airlines on ELP to DEN83.5%
- Frontier Airlines on ELP to DEN78.6%
- Southwest Airlines on ELP to DEN76.6%
- ELP to DFW, a related route77.9%
- PHX to DEN, a related route77.2%
- ELP to PHX, a related route81.1%
- United Airlines on-time record83.5%
- Frontier Airlines on-time record78.6%
- Southwest Airlines on-time record76.6%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Direction matters. ELP to DEN and DEN to ELP are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.