Carrier route record
F9DEN→DFW
Frontier Airlines · Denver to Dallas-Fort Worth
- Flights
- 1,125
- Period
- July 2025 to June 2026
- Share of route
- 19%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on DEN to DFW sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 1,125 flights. The strongest carrier on the route with a full sample, United Airlines, flew 1,902 at 77.2% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Frontier on DEN to DFW from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.2%
Arrivals under 15 minutes late, of 1,112 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
0.80%
National rate is 1.81%
Whole route
75.0%
Every carrier on DEN to DFW, 6,029 flights
These figures cover 1,125 flights between July 2025 and June 2026. Beyond the headline rate, 8.1% 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 DEN to DFW
Frontier flew 1,125 of the 6,029 flights on DEN to DFW, about 19% of it. Its 75.2% on time is about level with the route as a whole at 75.0%. Ranked by on-time rate it is number three of five carriers on the route, where the range runs from SkyWest at 91.3% to American at 73.3%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlinesthin sample | 23 | 91.3% | 79 min | 0.00% | A+ |
| United Airlines | 1,902 | 77.2% | 69 min | 0.79% | B+ |
| Frontier Airlines (this page) | 1,125 | 75.2% | 71 min | 0.80% | B+ |
| Envoy Airthin sample | 24 | 75.0% | 81 min | 0.00% | B+ |
| American Airlines | 2,955 | 73.3% | 100 min | 3.42% | C− |
American Airlines cancels 3.4% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Flight by flight
Frontier flight numbers on DEN to DFW
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 27 points, against 4 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am273 flights88.9%
- 8am–11am270 flights80.9%
- 11am–2pm70 flights71.0%
- 2pm–5pm109 flights68.2%
- 5pm–8pm107 flights62.3%
- 8pm–5am296 flights65.5%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 62.3% on time, against 88.9% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8pm–5am window is the busiest, with 296 flights scheduled in it.
Across the year
Frontier on DEN to DFW through the year
July is the worst month at 64.3% on time, 19 points below November, the best at 83.5%. 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 114 flights.
Across the week, Friday is the strongest day at 78.0% on time and Monday the weakest at 68.8%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Frontier runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 50% of the 20,000 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.
- 50%Late-arriving aircraft
- 25%Carrier
- 24%National Airspace System
- 1%Extreme weather
50% 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 20,000 reported delay minutes here, that single category outweighs weather by 34 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 19,502 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 88.9% on time here.
Cancellations are rare at 0.80%, 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
8.1% 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 641 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 runs 77.7% on time across 1,126 flights, within 3 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,125 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 Frontier on DEN to DFW
Put together: the calendar is the biggest lever here, not the carrier or the hour. November runs 83.5% on time and July 64.3%, a swing of 19 points. If the dates move at all, move them out of July before you think about anything else. 1,112 completed flights over 12 months sit behind that.
Related
Where to go next
- DEN to DFW, every carrier
- Frontier on DFW to DEN, the return leg
- United Airlines on DEN to DFW77.2%
- American Airlines on DEN to DFW73.3%
- Frontier Airlines network-wide record
- Denver International (DEN) delay statistics
- Dallas/Fort Worth International (DFW) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
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.