Carrier route record
YXEWR→STL
Republic Airways · Newark to St. Louis
- Flights
- 866
- 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 EWR to STL carries a cancellation problem, not just a delay problem: 5.5% 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 an A− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 866 flights, with a median arrival 16 minutes early.
Set against the rest of the country, Republic's EWR to STL record is 10 points better than the US average of 77.3%. That gap is worth roughly 95 fewer late arrivals for every thousand flights.
Key figures
On time
86.8%
Arrivals under 15 minutes late, of 816 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
5.54%
National rate is 1.89%
Whole route
82.8%
Every carrier on EWR to STL, 1,074 flights
These figures cover 866 flights between September 2025 and August 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.
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Carrier by carrier
Republic against every carrier on EWR to STL
Republic flew 866 of the 1,074 flights on EWR to STL, most of the route. Its 86.8% on time is 4 points better than the route as a whole, which runs 82.8%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 86.8% to United 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) | 866 | 86.8% | 65 min | 5.54% | A− |
| United Airlinesthin sample | 208 | 66.7% | 73 min | 4.81% | C− |
Flight by flight
Republic flight numbers on EWR to STL
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 is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 866 flights.
- 5am–8am—
- 8am–11am298 flights90.8%
- 11am–2pm—
- 2pm–5pm304 flights87.7%
- 5pm–8pm19 flights—
- 8pm–5am245 flights81.2%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 90.8% of the time, against 81.2% for the overnight window. That is 10 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 304 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, Friday is the strongest day at 90.8% on time and Saturday the weakest at 80.9%, a spread of 10 points.
Arrival by arrival
How late Republic on EWR to STL runs when it is late
Republic on EWR to STL often beats the schedule: 433 of 816 completed flights, 53%, arrived 15 minutes or more early. The 108 late arrivals split 35 under half an hour, 40 between 30 and 60 minutes, and 33 an hour or more.
- 15+ min early433 flights53.1%
- Within 15 min275 flights33.7%
- 15–29 min late35 flights4.3%
- 30–59 min late40 flights4.9%
- 1–2 hours late23 flights2.8%
- 2+ hours late10 flights1.2%
Scale runs 0% to 100%.
Share of 816 completed flights by arrival against schedule.
25 of 97 late departures made up the time and arrived on time, 26% of them. 36 flights left on time and still arrived late.
The worst days
Worst days for Republic on EWR to STL
The latest arrival of the period was on 4 September 2025, 13 hours 43 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across September, February, October, November and April, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 September 2025 | 13 hours 43 minutes | Extreme weather |
| 7 February 2026 | 6 hours 51 minutes | Carrier |
| 11 October 2025 | 3 hours 36 minutes | Late-arriving aircraft |
| 5 November 2025 | 3 hours 25 minutes | Carrier |
| 27 April 2026 | 3 hours 17 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 7,026 reported delay minutes.
- 34%Late-arriving aircraft
- 27%Carrier
- 26%National Airspace System
- 12%Extreme weather
Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 7,026 reported delay minutes.
34% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,026 reported delay minutes here, that single category outweighs weather by 3 to one.
Cancellations run at 5.54%, 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
Badly late arrivals are rare here: only 4.0% land an hour or more behind schedule, against 8.3% 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.
The return leg is a different operation and performs like one: it runs 83.3% on time across 868 flights, 4 points below 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. 866 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 5.54% cancellation rate. A late arrival costs you about 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. 816 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 STL66.7%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.