Carrier performance at one airport
F9→ATL
Frontier Airlines at Hartsfield-Jackson Atlanta International
- Departures
- 20,778
- Period
- September 2025 to August 2026
- Routes
- 25
- Rank here
- #12 of 12
Frontier Airlines at Atlanta draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 20,778 flights, of which United Airlines flew 7,672 at 79.7% on time.
Measured against the airport rather than the country, Frontier Airlines runs 14 points behind the 77.8% weighted average across all carriers at ATL. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
63.7%
20,232 completed departures
Avg delay
83 min
Across delayed flights only
Cancelled
2.42%
At ATL, this carrier only
Rank here
#12
Of 12 carriers clearing the floor at ATL
These figures cover 21,000 flights between September 2025 and August 2026. Beyond the headline rate, 15.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Against the competition
Every carrier at ATL, ranked
The choice of carrier is not cosmetic here. United Airlines arrives on time 79.7% of the time; Frontier Airlines manages 63.7%. Sample sizes sit next to every figure, because a two-point gap across 20,778 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 7,672 | 79.7% | 84 min | 1.51% | B |
| Delta Air Lines | 240,917 | 79.5% | 59 min | 1.67% | B |
| Alaska Airlines | 1,359 | 78.7% | 54 min | 0.81% | B+ |
| PSA Airlines | 3,319 | 77.6% | 110 min | 5.33% | B− |
| Southwest Airlines | 17,133 | 76.4% | 59 min | 1.10% | B |
| American Airlines | 6,907 | 75.7% | 106 min | 1.90% | B |
| SkyWest Airlines | 6,699 | 75.1% | 106 min | 2.58% | B |
| Republic Airways | 3,135 | 74.9% | 84 min | 4.85% | C− |
| Envoy Air | 1,064 | 72.1% | 69 min | 2.54% | C |
| Spirit Airlines | 3,886 | 70.7% | 77 min | 4.01% | C− |
| JetBlue Airways | 2,858 | 69.1% | 89 min | 4.55% | C− |
| Frontier Airlines (this page) | 20,778 | 63.7% | 83 min | 2.42% | D |
PSA Airlines cancels 5.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Where Frontier Airlines flies from ATL
Frontier Airlines operates 25 routes out of ATL with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ATL to MCO · Orlando | 1,270 | 64.8% | 117 min | 2.20% | D |
| ATL to PHL · Philadelphia | 1,085 | 61.6% | 94 min | 3.13% | D− |
| ATL to FLL · Fort Lauderdale | 1,008 | 64.0% | 77 min | 2.48% | D |
| ATL to BWI · Baltimore | 973 | 61.6% | 73 min | 3.39% | D− |
| ATL to LGA · New York | 950 | 46.2% | 107 min | 6.84% | F− |
| ATL to TPA · Tampa | 937 | 64.8% | 84 min | 1.81% | D |
| ATL to MIA · Miami | 937 | 63.4% | 96 min | 1.60% | D |
| ATL to DFW · Dallas-Fort Worth | 934 | 59.8% | 80 min | 1.71% | D |
| ATL to IAH · Houston | 827 | 69.5% | 87 min | 1.57% | C |
| ATL to DEN · Denver | 793 | 71.2% | 79 min | 1.39% | C |
| ATL to CLE · Cleveland | 718 | 68.7% | 69 min | 2.51% | C |
| ATL to ORD · Chicago | 716 | 64.4% | 107 min | 3.07% | D− |
| ATL to EWR · Newark | 707 | 58.5% | 89 min | 4.24% | D− |
| ATL to IAD · Washington | 661 | 63.1% | 82 min | 2.12% | D |
| ATL to JFK · New York | 659 | 70.1% | 81 min | 2.28% | C |
| ATL to RDU · Raleigh | 646 | 60.2% | 74 min | 2.79% | D |
| ATL to MDW · Chicago | 640 | 64.8% | 89 min | 2.50% | D |
| ATL to LAS · Las Vegas | 596 | 62.9% | 93 min | 1.85% | D |
| ATL to DTW · Detroit | 546 | 64.6% | 68 min | 1.28% | D |
| ATL to LAX · Los Angeles | 490 | 70.5% | 61 min | 1.63% | C |
| ATL to BOS · Boston | 453 | 67.3% | 54 min | 2.87% | C |
| ATL to SJU · San Juan | 387 | 56.5% | 67 min | 1.81% | D |
| ATL to SFO · San Franciscothin sample | 310 | 65.6% | 63 min | 1.29% | C |
| ATL to AUS · Austinthin sample | 295 | 66.7% | 77 min | 1.36% | C |
| ATL to CVG · Cincinnatithin sample | 294 | 71.8% | 80 min | 1.02% | C |
Flight by flight
Frontier Airlines flight numbers from ATL
38 Frontier Airlines flight numbers leaving ATL flew their main route often enough to have a record of their own. Grouped by destination.
- F9 4211to AUS 15:1066.2%
- F9 3512to BOS 05:0573.1%
- F9 2510to BWI 05:3072.7%
- F9 2410to CLE 09:5673.5%
- F9 4036to CLE 21:1560.0%
- F9 4771to CVG 10:1672.0%
- F9 3293to DEN 12:3381.2%
- F9 3599to DEN 20:4060.7%
- F9 1269to DFW 14:3963.1%
- F9 3021to DFW 10:5467.0%
- F9 3097to DFW 21:1550.2%
- F9 1264to DTW 06:0066.8%
- F9 1158to EWR 19:0461.9%
- F9 4602to EWR 22:4055.4%
- F9 2174to FLL 22:4857.6%
- F9 1403to IAH 06:0774.7%
- F9 4075to IAH 21:2561.3%
- F9 4732to JFK 09:3773.3%
- F9 3923to LAS 19:1157.0%
- F9 4891to LAS 11:0767.5%
- F9 4315to LAX 10:3573.8%
- F9 3288to LGA 20:5736.9%
- F9 3454to LGA 15:3051.1%
- F9 3976to MCO 12:3966.9%
- F9 4556to MCO 08:1476.3%
- F9 2291to MDW 20:5964.5%
- F9 2779to MDW 21:1564.5%
- F9 3442to MIA 22:5048.6%
- F9 4406to MIA 11:4772.5%
- F9 1441to ORD 06:3572.7%
- F9 3072to ORF 09:2876.3%
- F9 1102to PHL 22:5045.7%
- F9 2298to PHL 10:1068.2%
- F9 1168to RDU 06:3569.0%
- F9 1670to RDU 22:4550.8%
- F9 2082to SJU 10:2557.7%
- F9 3054to TPA 22:5058.7%
- F9 3782to TPA 10:0370.5%
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 points, against 16 points between the best and worst carrier.
- 5am–8am2,261 flights79.5%
- 8am–11am4,786 flights70.2%
- 11am–2pm1,865 flights70.2%
- 2pm–5pm3,804 flights62.5%
- 5pm–8pm2,401 flights57.2%
- 8pm–5am5,661 flights53.3%
Scale runs 45% to 85%.
The 8pm–5am window is where this operation falls apart: 53.3% on time, against 79.5% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8pm–5am window is the busiest, with 5,661 flights scheduled in it.
Across the year
Seasonal pattern
July is the worst month at 52.4% on time, 26 points below September, the best at 78.4%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. June was the busiest month here, with 2,035 flights.
Delay causes
What holds this operation up
- 53%Late-arriving aircraft
- 29%Carrier
- 17%National Airspace System
- 2%Extreme weather
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 611,000 reported delay minutes here, that single category outweighs weather by 31 to one. The split is drawn from 611,403 reported delay minutes.
Cancellations sit at 2.42% against a national 1.89%, which is ordinary. Diversions add another 0.21%.
15.6% 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.
20,778 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 78.4% on time and July 52.4%, a swing of 26 points. If the dates move at all, move them out of July before you think about anything else. 20,232 completed flights over 12 months sit behind that.
Common questions
Frontier Airlines at ATL
How often is Frontier Airlines at ATL delayed?
Roughly one flight in three arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 36.3% of the 20,778 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
Which airline is most reliable on Frontier Airlines at ATL?
United Airlines leads at 79.7% on time across 7,672 flights. Frontier Airlines is at the other end on 63.7%, a gap of 16 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on Frontier Airlines at ATL?
The 5am–8am departure window is the strongest at 79.5% on time. The 8pm–5am window is the weakest at 53.3%, 26 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on Frontier Airlines at ATL?
July is the weakest month at 52.4% on time, compared with 78.4% in September. Across the year that is 26 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- Frontier Airlines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) all carriers
- ATL to MCO route record64.8%
- ATL to PHL route record61.6%
- ATL to FLL route record64.0%
- ATL to BWI route record61.6%
- Do airlines run better at their own hubs?
- Why the first flight of the morning is statistically safest
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.