Flight number record

F9 2173

Frontier Airlines · Fort Lauderdale to Atlanta

Route: FLL → ATL
Departs: 06:00
Flights: 339
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 2173, check with Frontier Airlines.

F9 2173 lands a B, 2 points better than the national rate of 77.6%. 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 is a workable record, not a spotless one. That rests on 339 flights, with a median arrival 9 minutes early.

On time

79.5%

Arrivals under 15 minutes late, of 331 completed flights

Avg delay

73 min

Across delayed arrivals only, not all flights

Cancelled

2.36%

National rate is 1.81%

1 hour+ late

7.9%

National rate is 8.1%

These figures cover 339 flights between July 2025 and June 2026. The median arrival is 9 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 2173 flies

F9 2173 flies FLL to ATL without a single fixed slot. Its most common scheduled departure was 06:00, used on 114 of 339 flights, with 05:30 (53 flights) and 05:40 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00114 flights33.6%
Departs 05:3053 flights15.6%
Departs 05:4038 flights11.2%

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 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 10 points worse at 79.5%. 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 2173 next to FLL to ATL

Every carrier on FLL to ATL combined arrived on time 71.8% of the time across 7,185 flights, so F9 2173 is 8 points ahead of it. Frontier flew 927 flights on the same city pair under all its flight numbers, including this one, and those ran 65.0% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 6 points.

F9 2173 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 2173thin sample	339	79.5%	73 min	2.36%	B
All Frontier Airlines on FLL–ATL	927	65.0%	85 min	2.80%	C
All carriers on FLL–ATL	7,185	71.8%	73 min	2.25%	C
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 2173 quarter by quarter

Quarter by quarter F9 2173 held fairly steady: 79.8% in Jul–Sep 2025, 85.2% in Oct–Dec 2025, 75.6% in Jan–Mar 2026 and 76.5% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights79.8%
Oct–Dec 202589 flights85.2%
Jan–Mar 202690 flights75.6%
Apr–Jun 202669 flights76.5%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, F9 2173 did best on Wednesday at 87.8% on time and worst on Saturday at 73.3%. Each day rests on about 48 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why F9 2173 runs late

One category carries most of the weight here. Carrier accounts for 55% of the 4,935 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
55%
National Airspace System
29%
Late-arriving aircraft
15%
Extreme weather
1%

The largest share of delay minutes, 55%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,735 of the 4,935 delay minutes reported here. The split is drawn from 4,935 delay minutes reported on F9 2173.

Cancellations sit at 2.36% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

7.9% 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 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 339 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. 339 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 79.5% on time with 2.36% cancelled over 339 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