Flight number record
F9 3862
Frontier Airlines · Salt Lake City to Denver
- Route
- SLC → DEN
- Departs
- 08:16
- Flights
- 360
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 3862, check with Frontier Airlines.
F9 3862 lands a B+, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 45 minutes on average. That rests on 360 flights, with a median arrival 10 minutes early.
Key figures
On time
79.6%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
1 hour+ late
4.2%
National rate is 8.3%
These figures cover 360 flights between September 2025 and August 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.
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Schedule
When F9 3862 flies
F9 3862 flies SLC to DEN without a single fixed slot. Its most common scheduled departure was 08:16, used on 84 of 360 flights, with 07:35 (48 flights) and 07:20 (42 flights) next.
- Departs 08:1684 flights23.3%
- Departs 07:3548 flights13.3%
- Departs 07:2042 flights11.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 08:16 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and F9 3862 runs 4 points worse at 79.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
F9 3862 next to SLC to DEN
Every carrier on SLC to DEN combined arrived on time 79.0% of the time across 7,709 flights, so F9 3862 is about level with it. Frontier flew 1,033 flights on the same city pair under all its flight numbers, including this one, and those ran 79.3% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 3862thin sample | 360 | 79.6% | 46 min | 0.28% | B+ |
| All Frontier Airlines on SLC–DEN | 1,033 | 79.3% | 79 min | 0.87% | B+ |
| All carriers on SLC–DEN | 7,709 | 79.0% | 61 min | 0.51% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 3862 quarter by quarter
Quarter by quarter F9 3862 held fairly steady: 84.6% in Oct–Dec 2025, 80.5% in Jan–Mar 2026, 77.5% in Apr–Jun 2026 and 75.8% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights—
- Oct–Dec 202592 flights84.6%
- Jan–Mar 202687 flights80.5%
- Apr–Jun 202689 flights77.5%
- Jul–Sep 202662 flights75.8%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, F9 3862 did best on Sunday at 92.3% on time and worst on Tuesday at 67.3%. Each day rests on about 51 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 3862 runs when it is late
F9 3862 often beats the schedule: 141 of 358 completed flights, 39%, arrived 15 minutes or more early. Most of the lateness is short. 38 of the 73 late arrivals were under half an hour behind, and 15 reached an hour or more.
- 15+ min early141 flights39.4%
- Within 15 min144 flights40.2%
- 15–29 min late38 flights10.6%
- 30–59 min late20 flights5.6%
- 1–2 hours late10 flights2.8%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 27 departures that left 15 minutes late or more, only 2 made it up before arrival. In the other direction, 48 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DEN.
The worst days
Worst days for F9 3862
The latest arrival of the period was on 19 January 2026, 4 hours 38 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 January 2026 | 4 hours 38 minutes | Carrier |
| 22 November 2025 | 2 hours 50 minutes | Carrier |
| 24 March 2026 | 2 hours 27 minutes | Extreme weather |
| 23 September 2025 | 2 hours 12 minutes | National Airspace System |
| 29 May 2026 | 2 hours 1 minute | Carrier |
Delay causes
Why F9 3862 runs late
National Airspace System accounts for 50% of the 3,340 delay minutes carriers reported here, and the remaining four split what is left.
- 50%National Airspace System
- 32%Carrier
- 11%Late-arriving aircraft
- 6%Extreme weather
50% 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 1,670 minutes out of 3,340, against a national NAS share of 21%. The split is drawn from 3,340 delay minutes reported on F9 3862.
Cancellations are rare at 0.28%, below the national 1.89% 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 4.2% land an hour or more behind schedule, against 8.3% 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 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 79.6% on time with 0.28% cancelled over 360 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to DEN, every carrier and departure
- DEN to SLC, the return direction
- Delta Air Lines 1623 on the same route85.3%
- Delta Air Lines 1586 on the same route68.3%
- Delta Air Lines 1553 on the same route78.9%
- SkyWest Airlines 4720 on the same route90.7%
- Delta Air Lines 1667 on the same route79.7%
- SkyWest Airlines 5683 on the same route93.9%
- Salt Lake City International (SLC) delay statistics
- Denver International (DEN) delay statistics
- Frontier Airlines on-time record
- Every Frontier Airlines flight number with a record
- The most and least reliable flight numbers in the US
- The best time of day to fly, according to 7.05 million flight records
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.