Carrier route record

F9DEN→OKC

Frontier Airlines · Denver to Oklahoma City

Flights: 366
Period: July 2025 to June 2026
Share of route: 12%
Carriers: 4

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

Frontier on DEN to OKC 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 about an hour behind schedule. That rests on 366 flights. The strongest carrier on the route with a full sample, SkyWest Airlines, flew 1,256 at 82.4% on time.

The US average over the same twelve months is 77.6%, so there is little to separate Frontier on DEN to OKC from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

75.3%

Arrivals under 15 minutes late, of 361 completed flights

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

Whole route

77.0%

Every carrier on DEN to OKC, 3,164 flights

These figures cover 366 flights between July 2025 and June 2026. Beyond the headline rate, 9.7% 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 OKC

Frontier flew 366 of the 3,164 flights on DEN to OKC, about 12% of it. Its 75.3% on time is 2 points worse than the route as a whole, which runs 77.0%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from SkyWest at 82.4% to Southwest at 70.9%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. SkyWest Airlines arrives on time 82.4% of the time; Southwest Airlines manages 70.9%. Sample sizes sit next to every figure, because a two-point gap across 1,223 flights means less than a ten-point one.

On-time performance by carrier on DEN to OKC
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines	1,256	82.4%	68 min	0.48%	B+
United Airlinesthin sample	319	80.4%	62 min	0.63%	B+
Frontier Airlines (this page)	366	75.3%	67 min	0.82%	B+
Southwest Airlines	1,223	70.9%	55 min	0.82%	C+

SkyWest leads Southwest by 12 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

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 28 points, against 12 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am6 flights—
8am–11am46 flights84.8%
11am–2pm30 flights93.3%
2pm–5pm94 flights77.2%
5pm–8pm152 flights70.5%
8pm–5am38 flights65.8%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

The best window here is not the first bank but the 11am–2pm slot at 93.3% on time, ahead of 8pm–5am at 65.8%. 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 152 flights scheduled in it.

Across the year

Frontier on DEN to OKC through the year

Jul–Sep 2025123 flights59.5%
Oct–Dec 202585 flights81.0%
Jan–Mar 202667 flights86.6%
Apr–Jun 202691 flights83.1%

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 75.3% on time across 366 flights.

Frontier on DEN to OKC did not run the same all year. Its best quarter was Jan–Mar 2026 at 86.6% on time and its weakest Jul–Sep 2025 at 59.5%, a swing of 27 points on roughly 92 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, Tuesday is the strongest day at 90.7% on time and Thursday the weakest at 65.5%. 25 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 66% of the 5,937 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.

Late-arriving aircraft
66%
Carrier
20%
National Airspace System
10%
Extreme weather
4%

66% 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 5,937 reported delay minutes here, that single category outweighs weather by 17 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 5,937 reported delay minutes.

Cancellations are rare at 0.82%, 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. 9.7% 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 495 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.

The return leg runs 77.1% on time across 366 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 366 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 DEN to OKC

Put together: treat all of this as provisional. 366 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 75.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 361 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