Best time to fly out of Newark Liberty (EWR)

The early-flight folk wisdom holds up at Newark Liberty: departures in the Before 6am band left on time 90.5% of the time, against 60.1% in the 10pm–12am band. These are historical odds, not forecasts. The records say what happened on this schedule over three years; they know nothing about tomorrow’s thunderstorm.

Data through June 2026 · Bureau of Transportation Statistics

On-time rate by hour and day

On this page, “on time” means a departure that pushed back less than 15 minutes behind its scheduled time — the Bureau of Transportation Statistics definition, and the one airlines are held to.

Share of departures that left on time, by hour band and day of week.
Departure time MonTueWedThuFriSatSun
Before 6am 87 90 92 91 92 91 89
6–8am 89 91 92 91 89 88 88
8–10am 85 89 90 87 86 85 85
10am–12pm 84 86 88 84 83 81 82
12–2pm 81 82 85 80 79 79 78
2–4pm 75 81 80 75 74 76 74
4–6pm 72 79 77 71 71 74 70
6–8pm 69 76 73 66 67 70 66
8–10pm 69 75 70 63 67 69 63
10pm–12am 60 63 64 58 58 65 55
fewer left on time more left on time

The steadiest stretch at EWR was Before 6am — 90.5% of departures left on time across 6,203 flights. The weakest was 10pm–12am at 60.1%. 6–8am departures from EWR left on time 89.8% of the time across 59,798 flights; 6–8pm departures, 69.5% across 46,486. That is a gap of 20.3 points, and it is the whole case for the early flight.

The year at EWR

July was the hard month at EWR: 65.5% of departures left on time, across 33,226 flights. October was the easy one at 84.5%. Each month pools three years of that month, so a single bad week does not decide it.

Share of departures that left on time, by calendar month. Best month in green, worst in amber. The hairline sits at the overall rate, 79%.
Departure on-time share at EWR by calendar month
Month Share departures that left on time Flights
January 80.9% 30,297
February 83% 28,540
March 79.4% 32,100
April 81.2% 30,594
May 78.3% 30,728
June 77.2% 29,783
July 65.5% 33,226
August 76.4% 32,832
September 82.7% 31,890
October 84.5% 33,643
November 81.9% 31,838
December 77.2% 32,034

Airlines at EWR

Every airline with at least 100 departures from EWR, busiest first. These are that airline’s departures from this airport only — its record across the country sits on its own page.

Airline Left on time Typical delay Cancelled Departures
United Airlines 77.7% 75 min 2.1% 204,875
Republic Airways 87% 72 min 4.4% 70,318
Spirit Airlines 73.7% 81 min 3.9% 27,925
American Airlines 78.3% 94 min 2.8% 19,816
Delta Air Lines 77.4% 97 min 2% 19,702
JetBlue Airways 76.9% 85 min 2.4% 16,498
Alaska Airlines 76.7% 80 min 2.2% 9,646
Endeavor Air 77% 93 min 3.9% 2,475
Envoy Air 71.5% 73 min 4.6% 2,239
Frontier Airlines 71.1% 109 min 2.9% 2,096
Allegiant Air 84.1% 85 min 0.8% 1,891

What delays out of EWR were put down to

Airlines file a reason with every arrival running 15 minutes late or more. Across 81,208 flights that departed EWR and ran 15 minutes late or more, the delay minutes break down with 40.5% put down to late-arriving aircraft and 28.5% to airline operations.

Late-arriving aircraft 40.5% Airline operations 28.5% Air traffic & airport volume 25.9% Severe weather 5.1% Security 0.1%
  • Late-arriving aircraft 40.5%
  • Airline operations 28.5%
  • Air traffic & airport volume 25.9%
  • Severe weather 5.1%
  • Security 0.1%

Late-arriving aircraft is the knock-on category: the plane came in late, so it went out late again. It is why a 7am problem in Newark is still a problem in Denver at dinnertime, and why it is usually the biggest slice on the bar.

If you are connecting through EWR

Of 377,780 scheduled arrivals into EWR, 75.3% reached the gate less than 15 minutes behind schedule. Of the 81,598 arrivals that ran late, 45.5% were no more than 45 minutes behind — which is the difference between a tight connection and a new boarding pass.

Work out a specific layover — pick the airport and the minutes you have, and the tool reads the same arrival records back as a share.

Busiest routes out of EWR

Ranked by flights, with the share that arrived on time at the far end. Where a route carries enough flights for a page of its own the chip goes there; otherwise it goes to the destination airport.

EWR in one number

Newark Liberty (EWR)

Rank 16 of 363 US airports by departures. Steadiest stretch of the day: Before 6am. Hardest month: July.

July 2023–June 2026 · 367,284 departures flown

79% of departures left on time

Questions about EWR

What is the best time of day to fly out of Newark Liberty?
Before 6am. Departures in that band left on time 90.5% of the time across 6,203 flights, July 2023 through June 2026 — the best of the ten bands in the day. The 10pm–12am band was the weakest at 60.1%.
Is the early flight out of EWR really more reliable?
6–8am departures from EWR left on time 89.8% of the time across 59,798 flights; 6–8pm departures, 69.5% across 46,486. That is a gap of 20.3 points, and it is the whole case for the early flight.
What is the worst month to fly out of EWR?
July: 65.5% of the departures that flew left on time, with 33,226 scheduled. October was the other end of the year at 84.5%. Each figure pools three years of that calendar month.
Which airline is most on time at EWR?
Republic Airways — 87% of its 70,318 departures from EWR left on time. Frontier Airlines sat at the other end at 71.1% over 2,096 flights. Only airlines with at least 100 departures here are ranked.
How often are flights cancelled at EWR?
2.7% of scheduled departures were cancelled over July 2023 through June 2026. Cancellations are counted against everything scheduled, not against everything that flew — a rate that looks small still adds up to real people in a rebooking line.