Airport month record
EWRSEP
Newark Liberty International in September 2025
- Departures
- 9,945
- Month
- September 2025
- National, same month
- 83.4%
- Carriers
- 10
Historical statistics for September 2025, not live status or a forecast for this year’s September. For today’s conditions at EWR, see live FAA status.
EWR in September lands a B, level with the national rate of 83.4%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 9,945 flights, of which Republic Airways flew 1,991 at 87.2% on time.
Republic Airways is the most reliable of the five carriers covered here at 87.2% on time across 1,991 flights.
Key figures
On time
82.7%
Arrivals under 15 minutes late, of 9,815 completed departures
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
1.11%
Nationally in September: 0.51%
Whole year
77.7%
EWR across all twelve months
These figures cover 9,945 departures from Newark Liberty International in September 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
September next to EWR's other months
Against EWR's own year, September ran 5 points better than the twelve-month rate of 77.7%, which makes it number three of twelve months, best first. Cancellations were unusually low for EWR in September, at 1.11% against 3.03% across the year. Either side of it, August ran 77.9% on time and October 71.0%, so a trip moved by a few weeks would have landed in a worse stretch.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| July 2025 | 10,478 | 68.2% | 106 min | 6.82% | C− |
| August 2025 | 10,410 | 77.9% | 85 min | 1.20% | B |
| September 2025 (this page) | 9,945 | 82.7% | 81 min | 1.11% | B |
| October 2025 | 10,578 | 71.0% | 62 min | 1.01% | C |
| November 2025 | 10,403 | 73.9% | 79 min | 4.39% | C− |
| December 2025 | 10,652 | 70.5% | 75 min | 2.63% | C |
| January 2026 | 9,977 | 78.8% | 68 min | 6.37% | B− |
| February 2026 | 9,244 | 81.8% | 67 min | 7.88% | B− |
| March 2026 | 10,755 | 77.7% | 76 min | 2.32% | B |
| April 2026 | 10,358 | 85.0% | 62 min | 0.69% | A+ |
| May 2026 | 10,300 | 86.4% | 72 min | 0.93% | A+ |
| June 2026 | 9,967 | 78.6% | 87 min | 1.53% | B |
Departure window
The best time of day to leave EWR in September
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 points, against 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,708 flights91.4%
- 8am–11am1,787 flights90.5%
- 11am–2pm1,493 flights87.8%
- 2pm–5pm1,974 flights75.2%
- 5pm–8pm1,730 flights74.2%
- 8pm–5am1,253 flights76.9%
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 91.4% of the time, against 74.2% for the evening window. That is 17 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 1,974 flights scheduled in it.
Across the week, Tuesday is the strongest day at 87.9% on time and Saturday the weakest at 72.9%. 15 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at EWR in September
The choice of carrier is not cosmetic here. Republic Airways arrives on time 87.2% of the time; American Airlines manages 80.7%. Sample sizes sit next to every figure, because a two-point gap across 461 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 5,403 | 81.1% | 75 min | 0.65% | B+ |
| Republic Airways | 1,991 | 87.2% | 82 min | 2.21% | A |
| Spirit Airlines | 710 | 82.0% | 97 min | 2.39% | B |
| Delta Air Lines | 572 | 84.1% | 112 min | 0.00% | B+ |
| American Airlines | 461 | 80.7% | 100 min | 1.30% | B |
| JetBlue Airwaysthin sample | 329 | 87.7% | 87 min | 0.91% | A+ |
| Alaska Airlinesthin sample | 292 | 80.2% | 82 min | 1.03% | B |
| Frontier Airlinesthin sample | 90 | 76.7% | 44 min | 0.00% | B+ |
| Envoy Airthin sample | 60 | 75.9% | 60 min | 3.33% | B− |
| Allegiant Airthin sample | 37 | 100.0% | — | 0.00% | A+ |
Republic leads American by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Route by route
Busiest routes out of EWR in September
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| EWR to ATL · Atlanta | 520 | 83.8% | 80 min | 0.38% | B+ |
| EWR to MCO · Orlando | 499 | 84.4% | 87 min | 1.00% | B |
| EWR to ORD · Chicago | 474 | 80.5% | 69 min | 1.27% | B |
| EWR to LAX · Los Angeles | 466 | 76.4% | 81 min | 1.07% | B |
| EWR to DTW · Detroitthin sample | 359 | 84.5% | 90 min | 1.39% | B |
| EWR to SFO · San Franciscothin sample | 357 | 75.9% | 86 min | 1.40% | B |
| EWR to BOS · Bostonthin sample | 336 | 54.0% | 75 min | 2.98% | F |
| EWR to IAH · Houstonthin sample | 327 | 87.5% | 76 min | 0.00% | A+ |
| EWR to DEN · Denverthin sample | 298 | 86.1% | 78 min | 0.67% | A+ |
| EWR to FLL · Fort Lauderdalethin sample | 292 | 82.9% | 87 min | 2.05% | B |
| EWR to DFW · Dallas-Fort Worththin sample | 288 | 81.7% | 91 min | 0.69% | B+ |
| EWR to MIA · Miamithin sample | 283 | 78.5% | 77 min | 0.35% | B+ |
| EWR to CLT · Charlottethin sample | 279 | 85.5% | 97 min | 1.08% | A |
| EWR to LAS · Las Vegasthin sample | 236 | 86.4% | 81 min | 0.42% | A+ |
| EWR to SEA · Seattlethin sample | 227 | 86.7% | 83 min | 0.88% | A+ |
| EWR to MSP · Minneapolisthin sample | 203 | 81.2% | 98 min | 0.00% | B+ |
| EWR to PBI · West Palm Beachthin sample | 203 | 82.2% | 46 min | 0.00% | B+ |
| EWR to CMH · Columbusthin sample | 200 | 87.6% | 69 min | 3.50% | A− |
| EWR to IND · Indianapolisthin sample | 199 | 86.2% | 71 min | 2.01% | A |
| EWR to PHX · Phoenixthin sample | 188 | 81.4% | 61 min | 1.60% | B |
| EWR to PIT · Pittsburghthin sample | 183 | 83.6% | 138 min | 3.28% | B− |
| EWR to BNA · Nashvillethin sample | 182 | 80.1% | 83 min | 0.55% | B+ |
| EWR to TPA · Tampathin sample | 173 | 84.9% | 65 min | 0.58% | B+ |
| EWR to CLE · Clevelandthin sample | 172 | 79.5% | 83 min | 0.58% | B+ |
| EWR to AUS · Austinthin sample | 160 | 86.7% | 66 min | 0.62% | A+ |
Delay causes
What held EWR up in September
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 137,000 reported delay minutes.
- 37%Late-arriving aircraft
- 28%National Airspace System
- 28%Carrier
- 8%Extreme weather
- 0%Security
37% 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 137,000 reported delay minutes here, that single category outweighs weather by 5 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 136,687 reported delay minutes.
Cancellations sit at 1.11% against a national 0.51%, which is ordinary. Diversions add another 0.20%.
7.0% of arrivals land an hour or more late, close to the national 5.4%. 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 a little over an hour, which a normal layover absorbs.
What to do with this
Flying from EWR in September
For a September trip through EWR: this is one of the better months to be flying from here, 82.7% on time with 1.11% cancelled. That is a base rate for the month as a whole; a single storm can still spoil a particular day.
Related
Where to go next
- Newark Liberty International (EWR), the whole year
- EWR in July68.2%
- EWR in August77.9%
- EWR in October71.0%
- EWR in November73.9%
- EWR in December70.5%
- EWR in January78.8%
- EWR in February81.8%
- EWR in March77.7%
- EWR in April85.0%
- EWR in May86.4%
- EWR in June78.6%
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.