Flight number record
F9 1376
Frontier Airlines · Phoenix to Denver
- Route
- PHX → DEN
- Departs
- 07:00
- Flights
- 347
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1376, check with Frontier Airlines.
F9 1376 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 347 flights, with a median arrival 9 minutes early.
Set against the rest of the country, F9 1376's record is 9 points better than the US average of 77.6%. That gap is worth roughly 91 fewer late arrivals for every thousand flights.
Key figures
On time
86.7%
Arrivals under 15 minutes late, of 346 completed flights
Avg delay
89 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
3.5%
National rate is 8.1%
These figures cover 347 flights between July 2025 and June 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Schedule
When F9 1376 flies
F9 1376 flies PHX to DEN without a single fixed slot. Its most common scheduled departure was 07:00, used on 65 of 347 flights, with 06:50 (58 flights) and 07:18 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 07:0065 flights18.7%
- Departs 06:5058 flights16.7%
- Departs 07:1849 flights14.1%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 1376 runs 3 points worse at 86.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
F9 1376 next to PHX to DEN
Every carrier on PHX to DEN combined arrived on time 77.2% of the time across 8,920 flights, so F9 1376 is 10 points ahead of it. Frontier flew 1,427 flights on the same city pair under all its flight numbers, including this one, and those ran 80.0% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1376thin sample | 347 | 86.7% | 89 min | 0.00% | A+ |
| All Frontier Airlines on PHX–DEN | 1,427 | 80.0% | 88 min | 0.63% | B+ |
| All carriers on PHX–DEN | 8,920 | 77.2% | 65 min | 0.70% | B+ |
| Frontier Airlines, whole network | 205,332 | 73.2% | 84 min | 1.85% | C |
Across the year
F9 1376 quarter by quarter
F9 1376 did not run the same all year. Its best quarter was Oct–Dec 2025 at 91.2% on time and its weakest Jul–Sep 2025 at 77.2%, a swing of 14 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.
- Jul–Sep 202592 flights77.2%
- Oct–Dec 202592 flights91.2%
- Jan–Mar 202685 flights90.6%
- Apr–Jun 202678 flights88.5%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, F9 1376 did best on Monday at 92.3% on time and worst on Wednesday at 77.8%. Each day rests on about 50 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Delay causes
Why F9 1376 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 4,111 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.
- 53%Late-arriving aircraft
- 24%National Airspace System
- 23%Carrier
53% 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 4,111 reported delay minutes here, that single category outweighs weather by 53 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 4,111 delay minutes reported on F9 1376.
Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.5% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 602 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.
Every one of the 347 flights under F9 1376 in the data flew PHX to DEN. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 347 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 F9 1376
For a booking, F9 1376 has one of the better records a US domestic flight can show: 86.7% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- PHX to DEN, every carrier and departure
- DEN to PHX, the return direction
- United Airlines 1226 on the same route74.3%
- Frontier Airlines 2142 on the same route71.8%
- Phoenix Sky Harbor International (PHX) delay statistics
- Denver International (DEN) delay statistics
- Frontier Airlines on-time record
- Every Frontier Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Frontier Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.