Flight number record

F9 3983

Frontier Airlines · Phoenix to Las Vegas

Route: PHX → LAS
Departs: 06:00
Flights: 286
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 3983, check with Frontier Airlines.

F9 3983 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 286 flights, with a median arrival 15 minutes early.

Set against the rest of the country, F9 3983's record is 16 points better than the US average of 77.6%. That gap is worth roughly 157 fewer late arrivals for every thousand flights.

On time

93.3%

Arrivals under 15 minutes late, of 284 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

0.70%

National rate is 1.81%

1 hour+ late

1.8%

National rate is 8.1%

These figures cover 286 flights between July 2025 and June 2026. The median arrival is 15 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 3983 flies

F9 3983 flies PHX to LAS without a single fixed slot. Its most common scheduled departure was 06:00, used on 39 of 286 flights, with 08:00 (32 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:0039 flights13.6%
Departs 08:0032 flights11.2%

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 3983 runs 4 points better at 93.3%. 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 3983 next to PHX to LAS

Every carrier on PHX to LAS combined arrived on time 78.7% of the time across 6,021 flights, so F9 3983 is 15 points ahead of it. Frontier flew 861 flights on the same city pair under all its flight numbers, including this one, and those ran 82.7% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 20 points.

F9 3983 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 3983thin sample	286	93.3%	51 min	0.70%	A+
All Frontier Airlines on PHX–LAS	861	82.7%	108 min	1.05%	B
All carriers on PHX–LAS	6,021	78.7%	62 min	0.96%	B+
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 3983 quarter by quarter

Quarter by quarter F9 3983 held fairly steady: 94.5% in Jul–Sep 2025, 94.0% in Oct–Dec 2025, 93.0% in Jan–Mar 2026 and 89.5% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights94.5%
Oct–Dec 202584 flights94.0%
Jan–Mar 202671 flights93.0%
Apr–Jun 202640 flights89.5%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, F9 3983 ranged from 89.1% on Sunday to 100.0% on Saturday. With about 41 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why F9 3983 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 42% of the 968 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
42%
National Airspace System
33%
Carrier
24%

42% 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 968 reported delay minutes here, that single category outweighs weather by 42 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 968 delay minutes reported on F9 3983.

Cancellations are rare at 0.70%, 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 1.8% 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 286 flights under F9 3983 in the data flew PHX to LAS. 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. 286 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 3983

For a booking, F9 3983 has one of the better records a US domestic flight can show: 93.3% on time and 0.70% 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