Flight number record

F9 1440

Frontier Airlines · Phoenix to Salt Lake City

Route: PHX → SLC
Departs: 06:00
Flights: 256
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1440, check with Frontier Airlines.

F9 1440 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 13 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 256 flights, with a median arrival 14 minutes early.

Set against the rest of the country, F9 1440's record is 13 points better than the US average of 77.6%. That gap is worth roughly 129 fewer late arrivals for every thousand flights.

On time

90.5%

Arrivals under 15 minutes late, of 252 completed flights

Avg delay

79 min

Across delayed arrivals only, not all flights

Cancelled

1.17%

National rate is 1.81%

1 hour+ late

3.6%

National rate is 8.1%

These figures cover 256 flights between July 2025 and June 2026. The median arrival is 14 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 1440 flies

F9 1440 flies PHX to SLC without a single fixed slot. Its most common scheduled departure was 06:00, used on 42 of 256 flights, with 08:00 (31 flights) and 09:05 (27 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:0042 flights16.4%
Departs 08:0031 flights12.1%
Departs 09:0527 flights10.5%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 1440 runs level with that at 90.5%. 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 1440 next to PHX to SLC

Every carrier on PHX to SLC combined arrived on time 83.0% of the time across 5,757 flights, so F9 1440 is 8 points ahead of it. Frontier flew 677 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 17 points.

F9 1440 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 1440thin sample	256	90.5%	79 min	1.17%	A
All Frontier Airlines on PHX–SLC	677	83.6%	78 min	1.77%	B
All carriers on PHX–SLC	5,757	83.0%	61 min	0.56%	B+
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 1440 quarter by quarter

Quarter by quarter F9 1440 held fairly steady: 85.5% in Jul–Sep 2025, 93.1% in Oct–Dec 2025, 92.0% in Jan–Mar 2026 and 90.7% 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 202564 flights85.5%
Oct–Dec 202573 flights93.1%
Jan–Mar 202676 flights92.0%
Apr–Jun 202643 flights90.7%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, F9 1440 did best on Tuesday at 97.4% on time and worst on Thursday at 82.9%. Each day rests on about 37 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why F9 1440 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 1,894 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
53%
Carrier
34%
National Airspace System
13%
Extreme weather
0%

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 1,894 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 1,894 delay minutes reported on F9 1440.

Cancellations sit at 1.17% against a national 1.81%, which is ordinary. Diversions add another 0.39%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.6% 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 507 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 256 flights under F9 1440 in the data flew PHX to SLC. 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. 256 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 1440

For a booking, F9 1440 has one of the better records a US domestic flight can show: 90.5% on time and 1.17% cancelled. That is a base rate, not a promise about any single 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