Flight number record
F9 2142
Frontier Airlines · Phoenix to Denver
- Route
- PHX → DEN
- Departs
- 16:48
- Flights
- 283
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 2142, check with Frontier Airlines.
F9 2142 draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 283 flights, with a median arrival 4 minutes early.
The national on-time rate over the same period is 77.3%, so F9 2142 runs 11 points behind the country as a whole. Across a thousand flights that is about 108 extra late arrivals.
Key figures
On time
66.5%
Arrivals under 15 minutes late, of 281 completed flights
Avg delay
92 min
Across delayed arrivals only, not all flights
Cancelled
0.71%
National rate is 1.89%
1 hour+ late
15.7%
National rate is 8.3%
These figures cover 283 flights between September 2025 and August 2026. Beyond the headline rate, 15.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 2142 flies
F9 2142 flies PHX to DEN without a single fixed slot. Its most common scheduled departure was 16:48, used on 53 of 283 flights.
- Departs 16:4853 flights18.7%
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 16:48 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and F9 2142 runs 5 points worse at 66.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
F9 2142 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 2142 is 10 points behind 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 trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 2142thin sample | 283 | 66.5% | 92 min | 0.71% | C+ |
| 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 2142 quarter by quarter
F9 2142 did not run the same all year. Its best quarter was Oct–Dec 2025 at 78.2% on time and its weakest Jul–Sep 2026 at 44.3%, a swing of 34 points on roughly 71 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 202516 flights—
- Oct–Dec 202578 flights78.2%
- Jan–Mar 202675 flights73.0%
- Apr–Jun 202652 flights67.3%
- Jul–Sep 202662 flights44.3%
Scale runs 35% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, F9 2142 did best on Tuesday at 77.1% on time and worst on Friday at 48.8%. Each day rests on about 40 flights, so a gap of 28 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 2142 runs when it is late
F9 2142 often beats the schedule: 82 of 281 completed flights, 29%, arrived 15 minutes or more early. The 94 late arrivals split 22 under half an hour, 28 between 30 and 60 minutes, and 44 an hour or more.
- 15+ min early82 flights29.2%
- Within 15 min105 flights37.4%
- 15–29 min late22 flights7.8%
- 30–59 min late28 flights10.0%
- 1–2 hours late21 flights7.5%
- 2+ hours late23 flights8.2%
Scale runs 0% to 100%.
Share of 281 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 91 departures that left 15 minutes late or more, only 7 made it up before arrival. 10 flights left on time and still arrived late.
The worst days
Worst days for F9 2142
The latest arrival of the period was on 25 January 2026, 8 hours 12 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 January 2026 | 8 hours 12 minutes | Late-arriving aircraft |
| 25 June 2026 | 7 hours 38 minutes | Late-arriving aircraft |
| 12 April 2026 | 6 hours 52 minutes | Late-arriving aircraft |
| 23 March 2026 | 6 hours 38 minutes | Late-arriving aircraft |
| 23 January 2026 | 5 hours 49 minutes | Late-arriving aircraft |
Delay causes
Why F9 2142 runs late
Late-arriving aircraft accounts for 60% of the 8,658 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Late-arriving aircraft
- 27%National Airspace System
- 13%Carrier
- 1%Extreme weather
60% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,658 reported delay minutes here, that single category outweighs weather by 60 to one. The split is drawn from 8,658 delay minutes reported on F9 2142.
Cancellations are rare at 0.71%, below the national 1.89% 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 routes
What a delay on this flight costs
15.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
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 283 flights under F9 2142 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. 283 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 2142
For a booking, F9 2142 is a flight to put a long connection behind. 15.7% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- PHX to DEN, every carrier and departure
- DEN to PHX, the return direction
- Frontier Airlines 1376 on the same route89.4%
- 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.