Flight number record
F9 1376
Frontier Airlines · Phoenix to Denver
- Route
- PHX → DEN
- Departs
- 07:00
- Flights
- 330
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 1376, check with Frontier Airlines.
F9 1376 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 330 flights, with a median arrival 10 minutes early.
Set against the rest of the country, F9 1376's record is 12 points better than the US average of 77.3%. That gap is worth roughly 121 fewer late arrivals for every thousand flights.
Key figures
On time
89.4%
Arrivals under 15 minutes late, of 329 completed flights
Avg delay
104 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
2.7%
National rate is 8.3%
These figures cover 330 flights between September 2025 and August 2026. The median arrival is 10 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.
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.
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 330 flights, with 06:50 (58 flights) and 06:40 (50 flights) next.
- Departs 07:0065 flights19.7%
- Departs 06:5058 flights17.6%
- Departs 06:4050 flights15.2%
Scale runs 0% to 100%.
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 level with that at 89.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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.
Against the route
F9 1376 next to PHX to DEN
Every carrier on PHX to DEN combined arrived on time 76.7% of the time across 9,012 flights, so F9 1376 is 13 points ahead of it. Frontier flew 1,494 flights on the same city pair under all its flight numbers, including this one, and those ran 78.8% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 17 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1376thin sample | 330 | 89.4% | 104 min | 0.00% | A+ |
| All Frontier Airlines on PHX–DEN | 1,494 | 78.8% | 92 min | 0.74% | B+ |
| All carriers on PHX–DEN | 9,012 | 76.7% | 68 min | 0.65% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 1376 quarter by quarter
F9 1376 did not run the same all year. Its best quarter was Jul–Sep 2026 at 95.6% on time and its weakest Jul–Sep 2025 at 73.3%, a swing of 22 points on roughly 66 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 202530 flights73.3%
- Oct–Dec 202592 flights91.2%
- Jan–Mar 202685 flights90.6%
- Apr–Jun 202678 flights88.5%
- Jul–Sep 202645 flights95.6%
Scale runs 65% to 100%.
By weekday, F9 1376 ranged from 86.3% on Sunday to 94.3% on Monday. With about 47 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late F9 1376 runs when it is late
F9 1376 often beats the schedule: 119 of 329 completed flights, 36%, arrived 15 minutes or more early. The 35 late arrivals split 14 under half an hour, 12 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early119 flights36.2%
- Within 15 min175 flights53.2%
- 15–29 min late14 flights4.3%
- 30–59 min late12 flights3.6%
- 1–2 hours late2 flights0.6%
- 2+ hours late7 flights2.1%
Scale runs 0% to 100%.
Share of 329 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 20 departures that left 15 minutes late or more, only 2 made it up before arrival. In the other direction, 17 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DEN.
The worst days
Worst days for F9 1376
The latest arrival of the period was on 9 March 2026, 13 hours 5 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in April 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 March 2026 | 13 hours 5 minutes | Late-arriving aircraft |
| 14 April 2026 | 12 hours 11 minutes | Late-arriving aircraft |
| 17 April 2026 | 6 hours 9 minutes | Late-arriving aircraft |
| 12 April 2026 | 4 hours 39 minutes | Late-arriving aircraft |
| 6 March 2026 | 3 hours 16 minutes | National Airspace System |
Delay causes
Why F9 1376 runs late
Late-arriving aircraft accounts for 60% of the 3,622 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Late-arriving aircraft
- 20%Carrier
- 19%National Airspace System
- 0%Extreme weather
60% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,622 reported delay minutes here, that single category outweighs weather by 60 to one. The split is drawn from 3,622 delay minutes reported on F9 1376.
Cancellations are rare at 0.00%, below the national 1.89% 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 2.7% land an hour or more behind schedule, against 8.3% 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.
Every one of the 330 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. 330 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: 89.4% 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
- Frontier Airlines 2142 on the same route66.5%
- United Airlines 597 on the same route86.2%
- Frontier Airlines 4768 on the same route84.3%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.