Flight number record

F9 3862

Frontier Airlines · Salt Lake City to Denver

Route: SLC → DEN
Departs: 07:20
Flights: 360
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 3862, check with Frontier Airlines.

F9 3862 lands a B+, level with 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 360 flights, with a median arrival 6 minutes early.

On time

78.1%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

5.1%

National rate is 8.1%

These figures cover 360 flights between July 2025 and June 2026. The median arrival is 6 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 3862 flies

F9 3862 flies SLC to DEN without a single fixed slot. Its most common scheduled departure was 07:20, used on 70 of 360 flights, with 07:35 (48 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:2070 flights19.4%
Departs 07:3548 flights13.3%

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 07:20 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 3862 runs 11 points worse at 78.1%. 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 3862 next to SLC to DEN

Every carrier on SLC to DEN combined arrived on time 77.8% of the time across 7,757 flights, so F9 3862 is about level with it. Frontier flew 1,012 flights on the same city pair under all its flight numbers, including this one, and those ran 78.1% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 5 points.

F9 3862 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 3862thin sample	360	78.1%	55 min	0.83%	B+
All Frontier Airlines on SLC–DEN	1,012	78.1%	73 min	0.89%	B+
All carriers on SLC–DEN	7,757	77.8%	61 min	0.55%	B+
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 3862 quarter by quarter

F9 3862 did not run the same all year. Its best quarter was Oct–Dec 2025 at 84.6% on time and its weakest Jul–Sep 2025 at 69.7%, a swing of 15 points on roughly 90 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 202592 flights69.7%
Oct–Dec 202592 flights84.6%
Jan–Mar 202687 flights80.5%
Apr–Jun 202689 flights77.5%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, F9 3862 did best on Sunday at 90.4% on time and worst on Wednesday at 66.0%. Each day rests on about 51 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why F9 3862 runs late

One category carries most of the weight here. Carrier accounts for 45% of the 4,317 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
45%
National Airspace System
44%
Late-arriving aircraft
6%
Extreme weather
5%

44% 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 1,912 minutes out of 4,317, against a national NAS share of 21%. The split is drawn from 4,317 delay minutes reported on F9 3862.

Cancellations are rare at 0.83%, 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

5.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

Every one of the 360 flights under F9 3862 in the data flew SLC 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. 360 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 3862

For a booking, read F9 3862 as 78.1% on time with 0.83% cancelled over 360 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