Carrier route record
YXSTL→LGA
Republic Airways · St. Louis to New York
- Flights
- 1,176
- Period
- September 2025 to August 2026
- Share of route
- 46%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on STL to LGA carries a cancellation problem, not just a delay problem: 4.8% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, about four flights in five arrive on time, worth a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 1,176 flights, with a median arrival 12 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Republic on STL to LGA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.6%
Arrivals under 15 minutes late, of 1,115 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
4.76%
National rate is 1.89%
Whole route
74.0%
Every carrier on STL to LGA, 2,578 flights
These figures cover 1,176 flights between September 2025 and August 2026. Beyond the headline rate, 10.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Republic against every carrier on STL to LGA
Republic flew 1,176 of the 2,578 flights on STL to LGA, about 46% of it. Its 79.6% on time is 6 points better than the route as a whole, which runs 74.0%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Republic at 79.6% to SkyWest at 66.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways (this page) | 1,176 | 79.6% | 87 min | 4.76% | B− |
| Southwest Airlines | 1,395 | 69.2% | 57 min | 3.08% | C− |
| SkyWest Airlinesthin sample | 7 | 66.7% | 26 min | 0.00% | C+ |
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 Republic runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 14 points, against half a point between the best and worst carrier.
- 5am–8am392 flights85.4%
- 8am–11am156 flights87.4%
- 11am–2pm326 flights73.7%
- 2pm–5pm290 flights73.8%
- 5pm–8pm12 flights—
- 8pm–5am—
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 73.7% on time against 87.4% for 8am–11am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 5am–8am window is the busiest, with 392 flights scheduled in it.
Across the year
Republic on STL to LGA through the year
September is the best month on the calendar at 91.7% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. March was the busiest month here, with 138 flights.
Across the week, Wednesday is the strongest day at 82.8% on time and Friday the weakest at 76.6%, a spread of 6 points.
Arrival by arrival
How late Republic on STL to LGA runs when it is late
Republic on STL to LGA often beats the schedule: 469 of 1,115 completed flights, 42%, arrived 15 minutes or more early. When Republic on STL to LGA is late it tends to be very late: 118 of its 227 late arrivals were an hour or more behind, and 55 were two hours or more.
- 15+ min early469 flights42.1%
- Within 15 min419 flights37.6%
- 15–29 min late54 flights4.8%
- 30–59 min late55 flights4.9%
- 1–2 hours late63 flights5.7%
- 2+ hours late55 flights4.9%
Scale runs 0% to 100%.
Share of 1,115 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 203 departures that left 15 minutes late or more, only 22 made it up before arrival. 46 flights left on time and still arrived late.
The worst days
Worst days for Republic on STL to LGA
The latest arrival of the period was on 11 August 2026, 9 hours 23 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 August 2026 | 9 hours 23 minutes | Carrier |
| 14 November 2025 | 7 hours 48 minutes | Carrier |
| 26 January 2026 | 7 hours 38 minutes | Carrier |
| 9 March 2026 | 6 hours 40 minutes | Late-arriving aircraft |
| 5 December 2025 | 6 hours 9 minutes | Late-arriving aircraft |
Delay causes
Why Republic 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 20,000 reported delay minutes.
- 34%Late-arriving aircraft
- 34%National Airspace System
- 28%Carrier
- 4%Extreme weather
34% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 20,000 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 19,751 reported delay minutes.
34% 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 6,648 minutes out of 20,000, against a national NAS share of 21%.
Cancellations run at 4.76%, against 1.89% 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
10.6% 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.
The 888 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 runs 77.5% on time across 1,175 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,176 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Republic on STL to LGA
Put together: the delay figures matter less here than the 4.76% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 1,115 completed flights over 12 months sit behind that.
Related
Where to go next
- STL to LGA, every carrier
- Republic on LGA to STL, the return leg
- Southwest Airlines on STL to LGA69.2%
- Republic Airways network-wide record
- St. Louis Lambert International (STL) 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.