Flight number record
F9 1263
Frontier Airlines · Detroit to Atlanta
- Route
- DTW → ATL
- Departs
- 06:10
- Flights
- 294
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 1263, check with Frontier Airlines.
F9 1263 lands a B+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 294 flights, with a median arrival 8 minutes early.
Key figures
On time
77.1%
Arrivals under 15 minutes late, of 292 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
0.68%
National rate is 1.89%
1 hour+ late
8.2%
National rate is 8.3%
These figures cover 294 flights between September 2025 and August 2026. Beyond the headline rate, 8.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 1263 flies
F9 1263 flies DTW to ATL without a single fixed slot. Its most common scheduled departure was 06:10, used on 59 of 294 flights, with 15:42 (31 flights) next.
- Departs 06:1059 flights20.1%
- Departs 15:4231 flights10.5%
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 06:10 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 1263 runs 12 points worse at 77.1%. 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 1263 next to DTW to ATL
Every carrier on DTW to ATL combined arrived on time 78.9% of the time across 4,832 flights, so F9 1263 is 2 points behind it. Frontier flew 546 flights on the same city pair under all its flight numbers, including this one, and those ran 66.0% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1263thin sample | 294 | 77.1% | 76 min | 0.68% | B+ |
| All Frontier Airlines on DTW–ATL | 546 | 66.0% | 103 min | 1.47% | C |
| All carriers on DTW–ATL | 4,832 | 78.9% | 75 min | 0.79% | B+ |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 1263 quarter by quarter
F9 1263 did not run the same all year. Its best quarter was Jul–Sep 2026 at 86.9% on time and its weakest Oct–Dec 2025 at 68.4%, a swing of 19 points on roughly 74 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 202529 flights—
- Oct–Dec 202580 flights68.4%
- Jan–Mar 202634 flights70.6%
- Apr–Jun 202689 flights79.8%
- Jul–Sep 202662 flights86.9%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, F9 1263 did best on Wednesday at 94.6% on time and worst on Monday at 61.7%. Each day rests on about 42 flights, so a gap of 33 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 1263 runs when it is late
F9 1263 often beats the schedule: 104 of 292 completed flights, 36%, arrived 15 minutes or more early. The 67 late arrivals split 23 under half an hour, 20 between 30 and 60 minutes, and 24 an hour or more.
- 15+ min early104 flights35.6%
- Within 15 min121 flights41.4%
- 15–29 min late23 flights7.9%
- 30–59 min late20 flights6.8%
- 1–2 hours late16 flights5.5%
- 2+ hours late8 flights2.7%
Scale runs 0% to 100%.
Share of 292 completed flights by arrival against schedule.
12 of 60 late departures made up the time and arrived on time, 20% of them. In the other direction, 19 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 1263
The latest arrival of the period was on 23 February 2026, 11 hours 49 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 February 2026 | 11 hours 49 minutes | Late-arriving aircraft |
| 30 June 2026 | 9 hours | Late-arriving aircraft |
| 1 January 2026 | 4 hours 20 minutes | Late-arriving aircraft |
| 21 August 2026 | 3 hours 34 minutes | Carrier |
| 8 November 2025 | 3 hours 29 minutes | Late-arriving aircraft |
Delay causes
Why F9 1263 runs late
Late-arriving aircraft accounts for 57% of the 5,077 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Late-arriving aircraft
- 24%Carrier
- 19%National Airspace System
- 0%Extreme weather
57% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,077 reported delay minutes here, that single category outweighs weather by 57 to one. The split is drawn from 5,077 delay minutes reported on F9 1263.
Cancellations are rare at 0.68%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
8.2% 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 594 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 294 flights under F9 1263 in the data flew DTW 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. 294 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 1263
For a booking, read F9 1263 as 77.1% on time with 0.68% cancelled over 294 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to ATL, every carrier and departure
- ATL to DTW, the return direction
- Delta Air Lines 2856 on the same route86.5%
- Delta Air Lines 1611 on the same route87.2%
- Delta Air Lines 1467 on the same route76.2%
- Delta Air Lines 2375 on the same route91.2%
- Delta Air Lines 2053 on the same route72.4%
- Delta Air Lines 965 on the same route86.6%
- Detroit Metropolitan Wayne County (DTW) 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
- 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.