Flight number record

F9 1571

Frontier Airlines · Phoenix to San Diego

Route: PHX → SAN
Departs: 08:00
Flights: 257
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1571, check with Frontier Airlines.

F9 1571 lands a B+, 4 points better than the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 257 flights, with a median arrival 10 minutes early.

Set against the rest of the country, F9 1571's record is 4 points better than the US average of 77.6%. That gap is worth roughly 40 fewer late arrivals for every thousand flights.

On time

81.6%

Arrivals under 15 minutes late, of 256 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.39%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 257 flights between July 2025 and June 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.

Schedule

When F9 1571 flies

F9 1571 flies PHX to SAN without a single fixed slot. Its most common scheduled departure was 08:00, used on 27 of 257 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:0027 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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and F9 1571 runs 3 points worse at 81.6%. 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 1571 next to PHX to SAN

Every carrier on PHX to SAN combined arrived on time 73.1% of the time across 5,933 flights, so F9 1571 is 9 points ahead of it. Frontier flew 406 flights on the same city pair under all its flight numbers, including this one, and those ran 76.5% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 8 points.

F9 1571 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 1571thin sample	257	81.6%	56 min	0.39%	B+
All Frontier Airlines on PHX–SAN	406	76.5%	83 min	0.99%	B+
All carriers on PHX–SAN	5,933	73.1%	56 min	1.28%	C
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 1571 quarter by quarter

F9 1571 did not run the same all year. Its best quarter was Jul–Sep 2025 at 91.4% on time and its weakest Apr–Jun 2026 at 77.8%, a swing of 14 points on roughly 64 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 202558 flights91.4%
Oct–Dec 202564 flights79.7%
Jan–Mar 202653 flights79.2%
Apr–Jun 202682 flights77.8%

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

By weekday, F9 1571 did best on Saturday at 94.1% on time and worst on Friday at 66.7%. Each day rests on about 37 flights, so a gap of 27 points is worth noticing but could still narrow in another year.

Delay causes

Why F9 1571 runs late

One category carries most of the weight here. Carrier accounts for 44% of the 2,642 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.

Carrier
44%
National Airspace System
35%
Late-arriving aircraft
21%

35% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 923 minutes out of 2,642, against a national NAS share of 21%. The split is drawn from 2,642 delay minutes reported on F9 1571.

Cancellations are rare at 0.39%, below the national 1.81% 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

Badly late arrivals are rare here: only 3.9% 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.

Every one of the 257 flights under F9 1571 in the data flew PHX to SAN. 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. 257 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 1571

For a booking, read F9 1571 as 81.6% on time with 0.39% cancelled over 257 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