Flight number record

F9 1375

Frontier Airlines · Denver to Phoenix

Route: DEN → PHX
Departs: 06:30
Flights: 293
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1375, check with Frontier Airlines.

F9 1375 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 293 flights, with a median arrival 8 minutes early.

Set against the rest of the country, F9 1375's record is 7 points better than the US average of 77.6%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.

On time

84.1%

Arrivals under 15 minutes late, of 290 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

1.02%

National rate is 1.81%

1 hour+ late

4.1%

National rate is 8.1%

These figures cover 293 flights between July 2025 and June 2026. The median arrival is 8 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 1375 flies

F9 1375 flies DEN to PHX without a single fixed slot. Its most common scheduled departure was 06:30, used on 47 of 293 flights, with 06:00 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:3047 flights16.0%
Departs 06:0043 flights14.7%

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 06:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 1375 runs 5 points worse at 84.1%. 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 1375 next to DEN to PHX

Every carrier on DEN to PHX combined arrived on time 75.7% of the time across 8,930 flights, so F9 1375 is 8 points ahead of it. Frontier flew 1,432 flights on the same city pair under all its flight numbers, including this one, and those ran 77.4% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 11 points.

F9 1375 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 1375thin sample	293	84.1%	75 min	1.02%	B
All Frontier Airlines on DEN–PHX	1,432	77.4%	69 min	0.63%	B+
All carriers on DEN–PHX	8,930	75.7%	67 min	0.80%	B+
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 1375 quarter by quarter

Quarter by quarter F9 1375 held fairly steady: 86.7% in Jul–Sep 2025, 80.0% in Oct–Dec 2025, 83.3% in Jan–Mar 2026 and 87.8% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202590 flights86.7%
Oct–Dec 202586 flights80.0%
Jan–Mar 202668 flights83.3%
Apr–Jun 202649 flights87.8%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, F9 1375 ranged from 80.0% on Saturday to 89.6% on Friday. With about 42 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why F9 1375 runs late

One category carries most of the weight here. National Airspace System accounts for 50% of the 3,457 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.

National Airspace System
50%
Carrier
38%
Late-arriving aircraft
11%
Extreme weather
1%

The largest share of delay minutes, 38%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,304 of the 3,457 delay minutes reported here. The split is drawn from 3,457 delay minutes reported on F9 1375.

Cancellations sit at 1.02% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.1% 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 293 flights under F9 1375 in the data flew DEN to PHX. 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. 293 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 1375

For a booking, read F9 1375 as 84.1% on time with 1.02% cancelled over 293 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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.

Key figures