Flight number record
F9 2348
Frontier Airlines · Denver to Indianapolis
- Route
- DEN → IND
- Departs
- 15:35
- Flights
- 270
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 2348, check with Frontier Airlines.
F9 2348 lands a B+, 3 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 an hour on average. That rests on 270 flights, with a median arrival 13 minutes early.
Key figures
On time
80.7%
Arrivals under 15 minutes late, of 270 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
8.1%
National rate is 8.3%
These figures cover 270 flights between September 2025 and August 2026. Beyond the headline rate, 8.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 2348 flies
F9 2348 flies DEN to IND without a single fixed slot. Its most common scheduled departure was 15:35, used on 40 of 270 flights, with 15:17 (31 flights) next.
- Departs 15:3540 flights14.8%
- Departs 15:1731 flights11.5%
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 15:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and F9 2348 runs 9 points better at 80.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
F9 2348 next to DEN to IND
Every carrier on DEN to IND combined arrived on time 77.2% of the time across 2,468 flights, so F9 2348 is 4 points ahead of it. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 2348thin sample | 270 | 80.7% | 66 min | 0.00% | B+ |
| All Frontier Airlines on DEN–INDthin sample | 270 | 80.7% | 66 min | 0.00% | B+ |
| All carriers on DEN–IND | 2,468 | 77.2% | 59 min | 0.45% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 2348 quarter by quarter
F9 2348 did not run the same all year. Its best quarter was Oct–Dec 2025 at 87.3% on time and its weakest Jul–Sep 2026 at 72.1%, a swing of 15 points on roughly 68 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 202521 flights—
- Oct–Dec 202563 flights87.3%
- Jan–Mar 202653 flights83.0%
- Apr–Jun 202672 flights80.6%
- Jul–Sep 202661 flights72.1%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, F9 2348 ranged from 75.0% on Friday to 84.0% on Thursday. With about 39 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late F9 2348 runs when it is late
F9 2348 often beats the schedule: 121 of 270 completed flights, 45%, arrived 15 minutes or more early. The 52 late arrivals split 16 under half an hour, 14 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early121 flights44.8%
- Within 15 min97 flights35.9%
- 15–29 min late16 flights5.9%
- 30–59 min late14 flights5.2%
- 1–2 hours late13 flights4.8%
- 2+ hours late9 flights3.3%
Scale runs 0% to 100%.
Share of 270 completed flights by arrival against schedule.
10 of 54 late departures made up the time and arrived on time, 19% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for F9 2348
The latest arrival of the period was on 2 August 2026, 5 hours 20 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across August, December, September and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 August 2026 | 5 hours 20 minutes | Carrier |
| 19 December 2025 | 3 hours 8 minutes | Late-arriving aircraft |
| 8 September 2025 | 2 hours 46 minutes | Carrier |
| 24 July 2026 | 2 hours 45 minutes | Late-arriving aircraft |
| 14 August 2026 | 2 hours 39 minutes | National Airspace System |
Delay causes
Why F9 2348 runs late
Late-arriving aircraft accounts for 43% of the 3,442 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 22%Carrier
- 18%National Airspace System
- 17%Extreme weather
Extreme weather accounts for 17% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.8 times the usual weather exposure. The split is drawn from 3,442 delay minutes reported on F9 2348.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
8.1% of arrivals land an hour or more late, close to the national 8.3%, so 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.
The 976 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.
Every one of the 270 flights under F9 2348 in the data flew DEN to IND. 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. 270 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 2348
For a booking, read F9 2348 as 80.7% on time with 0.00% cancelled over 270 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DEN to IND, every carrier and departure
- IND to DEN, the return direction
- United Airlines 1199 on the same route75.1%
- Denver International (DEN) delay statistics
- Indianapolis International (IND) 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
- Why the first flight of the morning is statistically safest
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.