Carrier route record

YXSTL→EWR

Republic Airways · St. Louis to Newark

Flights: 948
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 STL to EWR carries a cancellation problem, not just a delay problem: 5.2% 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 a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 948 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 77.6%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.

On time

83.6%

Arrivals under 15 minutes late, of 896 completed flights

Avg delay

94 min

Across delayed arrivals only, not all flights

Cancelled

5.17%

National rate is 1.81%

Whole route

81.3%

Every carrier on STL to EWR, 1,075 flights

These figures cover 948 flights between July 2025 and June 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.

Carrier by carrier

Republic against every carrier on STL to EWR

Republic flew 948 of the 1,075 flights on STL to EWR, most of the route. Its 83.6% on time is 2 points better than the route as a whole, which runs 81.3%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 83.6% to United at 65.4%. 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.

On-time performance by carrier on STL to EWR
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airways (this page)	948	83.6%	94 min	5.17%	B−
United Airlinesthin sample	127	65.4%	91 min	0.00%	C+

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 16 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–8am323 flights90.0%
8am–11am—
11am–2pm314 flights86.0%
2pm–5pm32 flights77.4%
5pm–8pm279 flights73.6%
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 90.0% of the time, against 73.6% for the evening window. That is 16 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 323 flights scheduled in it.

Across the year

Republic on STL to EWR through the year

Darker means more delays. Figures are on-time percentages.May best, October worst

May is the best month on the calendar at 93.8% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. September was the busiest month here, with 101 flights.

Across the week, Friday is the strongest day at 88.5% on time and Sunday the weakest at 78.9%. 10 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 45% of the 14,000 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.

Late-arriving aircraft
45%
National Airspace System
38%
Carrier
13%
Extreme weather
4%

45% 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 14,000 reported delay minutes here, that single category outweighs weather by 12 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 13,879 reported delay minutes.

38% 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 5,270 minutes out of 14,000, against a national NAS share of 21%.

Cancellations run at 5.17%, against 1.81% 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

6.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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. 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 86.4% on time across 946 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. 948 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 5.17% 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. 896 completed flights over 12 months sit behind that.

Where to go next

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.

Key figures