Flight number record
F9 2173
Frontier Airlines · Fort Lauderdale to Atlanta
- Route
- FLL → ATL
- Departs
- 06:00
- Flights
- 278
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 2173, check with Frontier Airlines.
F9 2173 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 a little over an hour on average. That rests on 278 flights, with a median arrival 10 minutes early.
Key figures
On time
80.5%
Arrivals under 15 minutes late, of 272 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
2.16%
National rate is 1.89%
1 hour+ late
8.1%
National rate is 8.3%
These figures cover 278 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 2173 flies
F9 2173 flies FLL to ATL without a single fixed slot. Its most common scheduled departure was 06:00, used on 63 of 278 flights, with 05:30 (53 flights) and 05:40 (38 flights) next.
- Departs 06:0063 flights22.7%
- Departs 05:3053 flights19.1%
- Departs 05:4038 flights13.7%
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 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 2173 runs 9 points worse at 80.5%. 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 2173 next to FLL to ATL
Every carrier on FLL to ATL combined arrived on time 71.0% of the time across 7,366 flights, so F9 2173 is 10 points ahead of it. Frontier flew 1,007 flights on the same city pair under all its flight numbers, including this one, and those ran 63.7% on time. 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 2173thin sample | 278 | 80.5% | 78 min | 2.16% | B |
| All Frontier Airlines on FLL–ATL | 1,007 | 63.7% | 91 min | 3.18% | D− |
| All carriers on FLL–ATL | 7,366 | 71.0% | 74 min | 2.59% | C |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 2173 quarter by quarter
F9 2173 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jan–Mar 2026 at 75.6%, a swing of 14 points on roughly 70 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 202530 flights90.0%
- Oct–Dec 202589 flights85.2%
- Jan–Mar 202690 flights75.6%
- Apr–Jun 202669 flights76.5%
Scale runs 65% to 95%.
By weekday, F9 2173 did best on Wednesday at 87.5% on time and worst on Thursday at 74.4%. Each day rests on about 40 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 2173 runs when it is late
F9 2173 often beats the schedule: 102 of 272 completed flights, 38%, arrived 15 minutes or more early. The 53 late arrivals split 16 under half an hour, 15 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early102 flights37.5%
- Within 15 min117 flights43.0%
- 15–29 min late16 flights5.9%
- 30–59 min late15 flights5.5%
- 1–2 hours late13 flights4.8%
- 2+ hours late9 flights3.3%
Scale runs 0% to 100%.
Share of 272 completed flights by arrival against schedule.
9 of 35 late departures made up the time and arrived on time, 26% of them. In the other direction, 27 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 ATL.
The worst days
Worst days for F9 2173
The latest arrival of the period was on 28 April 2026, 10 hours 54 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 April 2026 | 10 hours 54 minutes | Late-arriving aircraft |
| 9 November 2025 | 6 hours 43 minutes | Carrier |
| 28 December 2025 | 3 hours 17 minutes | National Airspace System |
| 10 April 2026 | 3 hours | Carrier |
| 13 March 2026 | 2 hours 54 minutes | Carrier |
Delay causes
Why F9 2173 runs late
Carrier accounts for 51% of the 4,114 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Carrier
- 31%National Airspace System
- 17%Late-arriving aircraft
- 1%Extreme weather
The largest share of delay minutes, 51%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,111 of the 4,114 delay minutes reported here. The split is drawn from 4,114 delay minutes reported on F9 2173.
Cancellations sit at 2.16% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
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 a little over an hour, which a normal layover absorbs.
The 581 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 278 flights under F9 2173 in the data flew FLL to ATL. 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. 278 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 2173
For a booking, read F9 2173 as 80.5% on time with 2.16% cancelled over 278 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- FLL to ATL, every carrier and departure
- ATL to FLL, the return direction
- Delta Air Lines 1215 on the same route93.9%
- Delta Air Lines 1326 on the same route88.7%
- Delta Air Lines 2345 on the same route65.9%
- Delta Air Lines 1168 on the same route96.7%
- Delta Air Lines 1271 on the same route76.2%
- Delta Air Lines 1094 on the same route80.9%
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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
- Worst months to fly in the US, ranked by the data
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.