Flight number record
F9 2347
Frontier Airlines · Indianapolis to Denver
- Route
- IND → DEN
- Departs
- 20:51
- Flights
- 255
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 2347, check with Frontier Airlines.
F9 2347 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 255 flights, with a median arrival 12 minutes early.
Key figures
On time
75.3%
Arrivals under 15 minutes late, of 255 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
11.0%
National rate is 8.3%
These figures cover 255 flights between September 2025 and August 2026. Beyond the headline rate, 11.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When F9 2347 flies
F9 2347 flies IND to DEN without a single fixed slot. Its most common scheduled departure was 20:51, used on 37 of 255 flights, with 20:39 (36 flights) and 20:53 (33 flights) next.
- Departs 20:5137 flights14.5%
- Departs 20:3936 flights14.1%
- Departs 20:5333 flights12.9%
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 20:51 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and F9 2347 runs 5 points better at 75.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
F9 2347 next to IND to DEN
Every carrier on IND to DEN combined arrived on time 78.0% of the time across 2,463 flights, so F9 2347 is 3 points behind it. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 2347thin sample | 255 | 75.3% | 83 min | 0.00% | B+ |
| All Frontier Airlines on IND–DENthin sample | 270 | 75.2% | 80 min | 0.00% | B+ |
| All carriers on IND–DEN | 2,463 | 78.0% | 59 min | 0.49% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 2347 quarter by quarter
F9 2347 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.0% on time and its weakest Jul–Sep 2026 at 70.5%, a swing of 13 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 202516 flights—
- Oct–Dec 202553 flights75.5%
- Jan–Mar 202653 flights83.0%
- Apr–Jun 202672 flights75.0%
- Jul–Sep 202661 flights70.5%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
Arrival by arrival
How late F9 2347 runs when it is late
F9 2347 often beats the schedule: 119 of 255 completed flights, 47%, arrived 15 minutes or more early. The 63 late arrivals split 16 under half an hour, 19 between 30 and 60 minutes, and 28 an hour or more.
- 15+ min early119 flights46.7%
- Within 15 min73 flights28.6%
- 15–29 min late16 flights6.3%
- 30–59 min late19 flights7.5%
- 1–2 hours late17 flights6.7%
- 2+ hours late11 flights4.3%
Scale runs 0% to 100%.
Share of 255 completed flights by arrival against schedule.
18 of 67 late departures made up the time and arrived on time, 27% of them. In the other direction, 14 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 2347
The latest arrival of the period was on 17 April 2026, 13 hours 2 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 April 2026 | 13 hours 2 minutes | Carrier |
| 2 August 2026 | 4 hours 36 minutes | Late-arriving aircraft |
| 13 August 2026 | 4 hours 2 minutes | National Airspace System |
| 14 August 2026 | 3 hours 35 minutes | Late-arriving aircraft |
| 6 March 2026 | 3 hours 17 minutes | Late-arriving aircraft |
Delay causes
Why F9 2347 runs late
Late-arriving aircraft accounts for 54% of the 5,207 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Late-arriving aircraft
- 26%National Airspace System
- 19%Carrier
- 1%Extreme weather
54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,207 reported delay minutes here, that single category outweighs weather by 43 to one. The split is drawn from 5,207 delay minutes reported on F9 2347.
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
11.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
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 255 flights under F9 2347 in the data flew IND 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. 255 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 2347
For a booking, read F9 2347 as 75.3% on time with 0.00% cancelled over 255 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- IND to DEN, every carrier and departure
- DEN to IND, the return direction
- United Airlines 1607 on the same route84.8%
- Indianapolis International (IND) 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
- 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.