Flight number record
F9 1596
Frontier Airlines · Chicago to Atlanta
- Route
- ORD → ATL
- Departs
- 06:55
- Flights
- 339
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 1596, check with Frontier Airlines.
F9 1596 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 339 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so F9 1596 runs 5 points behind the country as a whole. Across a thousand flights that is about 49 extra late arrivals.
Key figures
On time
72.4%
Arrivals under 15 minutes late, of 330 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
2.36%
National rate is 1.89%
1 hour+ late
7.3%
National rate is 8.3%
These figures cover 339 flights between September 2025 and August 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
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Schedule
When F9 1596 flies
F9 1596 flies ORD to ATL without a single fixed slot. Its most common scheduled departure was 06:55, used on 54 of 339 flights, with 07:05 (53 flights) and 05:05 (38 flights) next.
- Departs 06:5554 flights15.9%
- Departs 07:0553 flights15.6%
- Departs 05:0538 flights11.2%
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 06:55 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 1596 runs 17 points worse at 72.4%. 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 1596 next to ORD to ATL
Every carrier on ORD to ATL combined arrived on time 74.1% of the time across 6,495 flights, so F9 1596 is 2 points behind it. Frontier flew 719 flights on the same city pair under all its flight numbers, including this one, and those ran 67.5% on time. Across its whole network Frontier Airlines managed 72.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1596thin sample | 339 | 72.4% | 80 min | 2.36% | C |
| All Frontier Airlines on ORD–ATL | 719 | 67.5% | 97 min | 3.48% | C− |
| All carriers on ORD–ATL | 6,495 | 74.1% | 81 min | 2.31% | C |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 1596 quarter by quarter
Quarter by quarter F9 1596 held fairly steady: 76.3% in Oct–Dec 2025, 67.8% in Jan–Mar 2026, 70.5% in Apr–Jun 2026 and 70.0% 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 202519 flights—
- Oct–Dec 202581 flights76.3%
- Jan–Mar 202687 flights67.8%
- Apr–Jun 202690 flights70.5%
- Jul–Sep 202662 flights70.0%
Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, F9 1596 did best on Wednesday at 82.5% on time and worst on Friday at 64.0%. Each day rests on about 48 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 1596 runs when it is late
F9 1596 often beats the schedule: 87 of 330 completed flights, 26%, arrived 15 minutes or more early. The 91 late arrivals split 34 under half an hour, 33 between 30 and 60 minutes, and 24 an hour or more.
- 15+ min early87 flights26.4%
- Within 15 min152 flights46.1%
- 15–29 min late34 flights10.3%
- 30–59 min late33 flights10.0%
- 1–2 hours late13 flights3.9%
- 2+ hours late11 flights3.3%
Scale runs 0% to 100%.
Share of 330 completed flights by arrival against schedule.
A late pushback is often recovered here: of 57 departures that left 15 minutes late or more, 18 still arrived on time. In the other direction, 52 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 1596
The latest arrival of the period was on 27 July 2026, 18 hours 5 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across July, June, September and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 July 2026 | 18 hours 5 minutes | Carrier |
| 7 June 2026 | 16 hours 44 minutes | Late-arriving aircraft |
| 4 September 2025 | 9 hours 24 minutes | Carrier |
| 7 December 2025 | 6 hours 7 minutes | National Airspace System |
| 12 June 2026 | 3 hours 50 minutes | Late-arriving aircraft |
Delay causes
Why F9 1596 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 7,249 reported delay minutes.
- 40%Carrier
- 34%National Airspace System
- 25%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,865 of the 7,249 delay minutes reported here. The split is drawn from 7,249 delay minutes reported on F9 1596.
Cancellations sit at 2.36% against a national 1.89%, which is ordinary. Diversions add another 0.29%.
Connections and routes
What a delay on this flight costs
7.3% 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 606 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 339 flights under F9 1596 in the data flew ORD 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 1596
For a booking, read F9 1596 as 72.4% on time with 2.36% cancelled over 339 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ORD to ATL, every carrier and departure
- ATL to ORD, the return direction
- Delta Air Lines 1264 on the same route91.3%
- Delta Air Lines 1247 on the same route87.8%
- United Airlines 356 on the same route73.1%
- Delta Air Lines 1147 on the same route79.3%
- Delta Air Lines 1178 on the same route85.4%
- United Airlines 1398 on the same route56.2%
- Chicago O'Hare International (ORD) 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.