Carrier route record
YXEWR→STL
Republic Airways · Newark to St. Louis
- Flights
- 946
- Period
- July 2025 to June 2026
- Share of route
- 88%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.
Republic on EWR to STL carries a cancellation problem, not just a delay problem: 5.6% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, more than four flights in five arrive on time, worth an A− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 946 flights, with a median arrival 16 minutes early.
Set against the rest of the country, Republic's EWR to STL record is 9 points better than the US average of 77.6%. That gap is worth roughly 88 fewer late arrivals for every thousand flights.
Key figures
On time
86.4%
Arrivals under 15 minutes late, of 891 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
5.60%
National rate is 1.81%
Whole route
84.6%
Every carrier on EWR to STL, 1,074 flights
These figures cover 946 flights between July 2025 and June 2026. The median arrival is 16 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.
Carrier by carrier
Republic against every carrier on EWR to STL
Republic flew 946 of the 1,074 flights on EWR to STL, most of the route. Its 86.4% on time is 2 points better than the route as a whole, which runs 84.6%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 86.4% to United at 71.7%. 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) | 946 | 86.4% | 69 min | 5.60% | A− |
| United Airlinesthin sample | 128 | 71.7% | 71 min | 0.78% | C+ |
Flight by flight
Republic flight numbers on EWR to STL
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 13 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am316 flights91.5%
- 11am–2pm—
- 2pm–5pm305 flights88.9%
- 5pm–8pm19 flights—
- 8pm–5am306 flights78.8%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 91.5% of the time, against 78.8% for the overnight window. That is 13 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 316 flights scheduled in it.
Across the year
Republic on EWR to STL through the year
December is the weak month at 73.3% on time, against 96.5% in April. 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. September was the busiest month here, with 101 flights.
Across the week, Sunday is the strongest day at 90.2% on time and Saturday the weakest at 83.5%. 7 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Republic runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 8,332 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 44%Late-arriving aircraft
- 25%Carrier
- 20%National Airspace System
- 10%Extreme weather
44% 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 8,332 reported delay minutes here, that single category outweighs weather by 4 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 8,332 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.5% on time here.
Cancellations run at 5.60%, against 1.81% 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
Badly late arrivals are rare here: only 4.7% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
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. 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 runs 83.6% on time across 948 flights, within 3 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 946 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 EWR to STL
Put together: the delay figures matter less here than the 5.60% cancellation rate. A late arrival costs you a little over an hour; 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. 891 completed flights over 12 months sit behind that.
Related
Where to go next
- EWR to STL, every carrier
- Republic on STL to EWR, the return leg
- United Airlines on EWR to STL71.7%
- Republic Airways network-wide record
- Newark Liberty International (EWR) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.