Carrier route record
F9ATL→LGA
Frontier Airlines · Atlanta to New York
- Flights
- 888
- Period
- July 2025 to June 2026
- Share of route
- 11%
- Carriers
- 5
Historical statistics for July 2025 to June 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: 5.1% of scheduled flights never operate, against 1.8% 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 888 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 1,575 at 77.1% on time.
Republic Airways is the most reliable of the three carriers covered here at 77.1% on time across 1,575 flights.
Key figures
On time
51.8%
Arrivals under 15 minutes late, of 838 completed flights
Avg delay
100 min
Across delayed arrivals only, not all flights
Cancelled
5.07%
National rate is 1.81%
Whole route
73.4%
Every carrier on ATL to LGA, 8,344 flights
These figures cover 888 flights between July 2025 and June 2026. Beyond the headline rate, 23.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Frontier against every carrier on ATL to LGA
Frontier flew 888 of the 8,344 flights on ATL to LGA, about 11% of it. Its 51.8% on time is 22 points worse than the route as a whole, which runs 73.4%. Ranked by on-time rate it is last of five carriers on the route, where the range runs from Spirit at 80.0% to Frontier at 51.8%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Republic Airways arrives on time 77.1% of the time; Southwest Airlines manages 69.6%. Sample sizes sit next to every figure, because a two-point gap across 935 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Spirit Airlinesthin sample | 10 | 80.0% | 87 min | 0.00% | B+ |
| Republic Airways | 1,575 | 77.1% | 84 min | 5.14% | B− |
| Delta Air Lines | 4,936 | 76.7% | 66 min | 2.96% | B |
| Southwest Airlines | 935 | 69.6% | 68 min | 3.10% | C− |
| Frontier Airlines (this page) | 888 | 51.8% | 100 min | 5.07% | F− |
Republic Airways cancels 5.1% 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
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 37 points, against 8 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am180 flights74.9%
- 11am–2pm64 flights77.0%
- 2pm–5pm176 flights46.1%
- 5pm–8pm125 flights41.9%
- 8pm–5am343 flights40.5%
Scale runs 30% to 80%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 40.5% on time, against 77.0% 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
Delays peak in March, when the on-time rate falls to 25.0%. January is the strongest month at 72.5%. Moving a flexible trip across that boundary buys 48 points. May was the busiest month here, with 93 flights.
Across the week, Thursday is the strongest day at 58.5% on time and Monday the weakest at 41.0%. 18 points is a smaller lever than departure hour, but it is free.
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 40,000 reported delay minutes.
- 37%Late-arriving aircraft
- 33%National Airspace System
- 26%Carrier
- 4%Extreme weather
37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 40,000 reported delay minutes here, that single category outweighs weather by 10 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 40,453 reported delay minutes.
33% 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 13,000 minutes out of 40,000, against a national NAS share of 21%.
Cancellations run at 5.07%, against 1.81% nationally. That is about one flight in twenty 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 23.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. 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.
The return leg is a different operation and performs like one: it runs 58.4% on time across 889 flights, 7 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 7 points of difference.
One caution: this is a thin sample. 888 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 5.07% 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. 838 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
- Republic Airways on ATL to LGA77.1%
- Delta Air Lines on ATL to LGA76.7%
- Southwest Airlines on ATL to LGA69.6%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.