Carrier route record
F9ATL→LGA
Frontier Airlines · Atlanta to New York
- Flights
- 950
- Period
- September 2025 to August 2026
- Share of route
- 11%
- Carriers
- 6
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on ATL to LGA carries a cancellation problem, not just a delay problem: 6.8% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, close to half of flights arrive on time, worth an F− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 950 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 4,937 at 75.9% on time.
Delta Air Lines is the most reliable of the three carriers covered here at 75.9% on time across 4,937 flights.
Key figures
On time
46.2%
Arrivals under 15 minutes late, of 879 completed flights
Avg delay
107 min
Across delayed arrivals only, not all flights
Cancelled
6.84%
National rate is 1.89%
Whole route
72.3%
Every carrier on ATL to LGA, 8,502 flights
These figures cover 950 flights between September 2025 and August 2026. Beyond the headline rate, 28.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Frontier against every carrier on ATL to LGA
Frontier flew 950 of the 8,502 flights on ATL to LGA, about 11% of it. Its 46.2% on time is 26 points worse than the route as a whole, which runs 72.3%. Ranked by on-time rate it is last of six carriers on the route, where the range runs from Delta at 75.9% to Frontier at 46.2%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The three carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 4,937 | 75.9% | 66 min | 3.48% | B− |
| Republic Airways | 1,905 | 75.5% | 88 min | 5.88% | B− |
| Spirit Airlinesthin sample | 4 | 75.0% | 29 min | 0.00% | B+ |
| Southwest Airlines | 700 | 72.0% | 65 min | 2.86% | C |
| American Airlinesthin sample | 6 | 66.7% | 23 min | 0.00% | C+ |
| Frontier Airlines (this page) | 950 | 46.2% | 107 min | 6.84% | F− |
Republic Airways cancels 5.9% 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.
Flight by flight
Frontier flight numbers on ATL to LGA
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Frontier runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 39 points, against 4 points between the best and worst carrier.
- 5am–8am—
- 8am–11am121 flights74.2%
- 11am–2pm76 flights75.0%
- 2pm–5pm223 flights43.1%
- 5pm–8pm187 flights36.8%
- 8pm–5am343 flights35.9%
Scale runs 25% to 80%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 35.9% on time, against 75.0% for the 11am–2pm 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 343 flights scheduled in it.
Across the year
Frontier on ATL to LGA through the year
July is the worst month at 19.4% on time, 53 points below January, the best at 72.5%. 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. May was the busiest month here, with 93 flights.
Across the week, Thursday is the strongest day at 52.0% on time and Monday the weakest at 34.4%, a spread of 18 points.
Arrival by arrival
How late Frontier on ATL to LGA runs when it is late
When Frontier on ATL to LGA is late it tends to be very late: 248 of its 473 late arrivals were an hour or more behind, and 121 were two hours or more.
- 15+ min early106 flights12.1%
- Within 15 min300 flights34.1%
- 15–29 min late102 flights11.6%
- 30–59 min late123 flights14.0%
- 1–2 hours late127 flights14.4%
- 2+ hours late121 flights13.8%
Scale runs 0% to 100%.
Share of 879 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 425 departures that left 15 minutes late or more, only 38 made it up before arrival. In the other direction, 86 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 LGA.
The worst days
Worst days for Frontier on ATL to LGA
The latest arrival of the period was on 4 August 2026, 19 hours 23 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 August 2026 | 19 hours 23 minutes | National Airspace System |
| 17 August 2026 | 16 hours 14 minutes | National Airspace System |
| 9 March 2026 | 14 hours 53 minutes | Extreme weather |
| 7 July 2026 | 11 hours 56 minutes | Late-arriving aircraft |
| 17 August 2026 | 11 hours 39 minutes | National Airspace System |
Delay causes
Why Frontier runs late on this route
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 51,000 reported delay minutes.
- 40%National Airspace System
- 36%Late-arriving aircraft
- 22%Carrier
- 2%Extreme weather
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 51,000 reported delay minutes here, that single category outweighs weather by 19 to one. The split is drawn from 50,657 reported delay minutes.
40% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 20,000 minutes out of 51,000, against a national NAS share of 21%.
Cancellations run at 6.84%, against 1.89% nationally. That is about one flight in fifteen cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
28.2% 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.
The 762 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.
The return leg is a different operation and performs like one: it runs 54.0% on time across 949 flights, 8 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 8 points of difference.
One caution: this is a thin sample. 950 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 Frontier on ATL to LGA
Put together: the delay figures matter less here than the 6.84% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 11am–2pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 879 completed flights over 12 months sit behind that.
Related
Where to go next
- ATL to LGA, every carrier
- Frontier on LGA to ATL, the return leg
- Delta Air Lines on ATL to LGA75.9%
- Republic Airways on ATL to LGA75.5%
- Southwest Airlines on ATL to LGA72.0%
- Frontier Airlines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- LaGuardia (LGA) delay statistics
- The US routes with the most cancellations
- 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.