Carrier route record
YXSTL→EWR
Republic Airways · St. Louis to Newark
- Flights
- 868
- Period
- September 2025 to August 2026
- Share of route
- 81%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on STL to EWR carries a cancellation problem, not just a delay problem: 6.0% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, more than 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 868 flights, with a median arrival 14 minutes early.
Set against the rest of the country, Republic's STL to EWR record is 6 points better than the US average of 77.3%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.
Key figures
On time
83.3%
Arrivals under 15 minutes late, of 812 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
5.99%
National rate is 1.89%
Whole route
81.4%
Every carrier on STL to EWR, 1,075 flights
These figures cover 868 flights between September 2025 and August 2026. The median arrival is 14 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Republic against every carrier on STL to EWR
Republic flew 868 of the 1,075 flights on STL to EWR, most of the route. Its 83.3% on time is 2 points better than the route as a whole, which runs 81.4%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 83.3% to United at 73.7%. 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) | 868 | 83.3% | 93 min | 5.99% | B− |
| United Airlinesthin sample | 207 | 73.7% | 90 min | 3.38% | 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 15 points, against half a point between the best and worst carrier.
- 5am–8am262 flights90.1%
- 8am–11am—
- 11am–2pm296 flights84.2%
- 2pm–5pm53 flights80.0%
- 5pm–8pm257 flights75.4%
- 8pm–5am—
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 90.1% of the time, against 75.4% for the evening window. That is 15 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 296 flights scheduled in it.
Across the year
Republic on STL to EWR through the year
July is the worst month at 63.5% on time, 30 points below May, the best at 93.8%. 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. September was the busiest month here, with 101 flights.
Across the week, Friday is the strongest day at 89.7% on time and Sunday the weakest at 77.7%, a spread of 12 points.
Arrival by arrival
How late Republic on STL to EWR runs when it is late
Republic on STL to EWR often beats the schedule: 396 of 812 completed flights, 49%, arrived 15 minutes or more early. The 136 late arrivals split 33 under half an hour, 45 between 30 and 60 minutes, and 58 an hour or more.
- 15+ min early396 flights48.8%
- Within 15 min280 flights34.5%
- 15–29 min late33 flights4.1%
- 30–59 min late45 flights5.5%
- 1–2 hours late36 flights4.4%
- 2+ hours late22 flights2.7%
Scale runs 0% to 100%.
Share of 812 completed flights by arrival against schedule.
18 of 119 late departures made up the time and arrived on time, 15% of them. 35 flights left on time and still arrived late.
The worst days
Worst days for Republic on STL to EWR
The latest arrival of the period was on 18 December 2025, 19 hours 38 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 December 2025 | 19 hours 38 minutes | Late-arriving aircraft |
| 13 December 2025 | 16 hours 39 minutes | Late-arriving aircraft |
| 18 May 2026 | 9 hours 4 minutes | Late-arriving aircraft |
| 7 February 2026 | 5 hours 56 minutes | Late-arriving aircraft |
| 18 October 2025 | 5 hours 24 minutes | Late-arriving aircraft |
Delay causes
Why Republic runs late on this route
Late-arriving aircraft accounts for 47% of the 13,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 34%National Airspace System
- 15%Carrier
- 4%Extreme weather
47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 13,000 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 12,577 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 4,217 minutes out of 13,000, against a national NAS share of 21%.
Cancellations run at 5.99%, against 1.89% nationally. That is roughly 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
7.1% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
The 872 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 86.8% on time across 866 flights, 4 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 4 points of difference.
One caution: this is a thin sample. 868 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 Republic on STL to EWR
Put together: the delay figures matter less here than the 5.99% cancellation rate. A late arrival costs you an hour and a half; 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. 812 completed flights over 12 months sit behind that.
Related
Where to go next
- STL to EWR, every carrier
- Republic on EWR to STL, the return leg
- United Airlines on STL to EWR73.7%
- Republic Airways network-wide record
- St. Louis Lambert International (STL) delay statistics
- Newark Liberty International (EWR) 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.