Carrier route record
YXLGA→STL
Republic Airways · New York to St. Louis
- Flights
- 1,175
- 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 LGA to STL carries a cancellation problem, not just a delay problem: 5.6% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, close to three flights in four 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 1,175 flights, with a median arrival 9 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Republic on LGA to STL from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
77.5%
Arrivals under 15 minutes late, of 1,106 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
5.62%
National rate is 1.89%
Whole route
75.2%
Every carrier on LGA to STL, 2,577 flights
These figures cover 1,175 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% 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 LGA to STL
Republic flew 1,175 of the 2,577 flights on LGA to STL, about 46% of it. Its 77.5% on time is 2 points better than the route as a whole, which runs 75.2%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Republic at 77.5% to SkyWest at 71.4%. 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) | 1,175 | 77.5% | 75 min | 5.62% | B− |
| Southwest Airlines | 1,395 | 73.3% | 68 min | 3.80% | C− |
| SkyWest Airlinesthin sample | 7 | 71.4% | 22 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 26 points, against half a point between the best and worst carrier.
- 5am–8am75 flights91.8%
- 8am–11am364 flights83.3%
- 11am–2pm314 flights80.9%
- 2pm–5pm37 flights69.4%
- 5pm–8pm331 flights65.6%
- 8pm–5am54 flights73.1%
Scale runs 55% to 95%.
Book the early departure. Flights leaving between 5am–8am arrive on time 91.8% of the time, against 65.6% for the evening window. That is 26 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 364 flights scheduled in it.
Across the year
Republic on LGA to STL through the year
December is the weak month at 61.8% on time, against 85.0% in June. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. March was the busiest month here, with 139 flights.
Across the week, Wednesday is the strongest day at 81.9% on time and Sunday the weakest at 72.7%, a spread of 9 points.
Arrival by arrival
How late Republic on LGA to STL runs when it is late
Republic on LGA to STL often beats the schedule: 433 of 1,106 completed flights, 39%, arrived 15 minutes or more early. The 249 late arrivals split 56 under half an hour, 93 between 30 and 60 minutes, and 100 an hour or more.
- 15+ min early433 flights39.2%
- Within 15 min424 flights38.3%
- 15–29 min late56 flights5.1%
- 30–59 min late93 flights8.4%
- 1–2 hours late64 flights5.8%
- 2+ hours late36 flights3.3%
Scale runs 0% to 100%.
Share of 1,106 completed flights by arrival against schedule.
41 of 227 late departures made up the time and arrived on time, 18% of them. In the other direction, 63 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 STL.
The worst days
Worst days for Republic on LGA to STL
The latest arrival of the period was on 15 December 2025, 11 hours 3 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across December, July, October and September, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 December 2025 | 11 hours 3 minutes | Carrier |
| 6 July 2026 | 7 hours 4 minutes | Extreme weather |
| 30 October 2025 | 5 hours 11 minutes | National Airspace System |
| 6 September 2025 | 5 hours 6 minutes | Late-arriving aircraft |
| 18 July 2026 | 4 hours 38 minutes | Extreme weather |
Delay causes
Why Republic runs late on this route
Late-arriving aircraft accounts for 48% of the 19,000 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Late-arriving aircraft
- 26%National Airspace System
- 19%Carrier
- 6%Extreme weather
- 0%Security
48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 19,000 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 18,623 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.8% on time here.
Cancellations run at 5.62%, against 1.89% nationally. That is roughly 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
9.0% 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 79.6% on time across 1,176 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 1,175 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 LGA to STL
Put together: the delay figures matter less here than the 5.62% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 1,106 completed flights over 12 months sit behind that.
Related
Where to go next
- LGA to STL, every carrier
- Republic on STL to LGA, the return leg
- Southwest Airlines on LGA to STL73.3%
- Republic Airways network-wide record
- LaGuardia (LGA) delay statistics
- St. Louis Lambert International (STL) 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.