Route on-time record
BUF to EWR: most on-time flights and the best time to fly
Buffalo (Buffalo Niagara International Airport) to Newark (Newark Liberty International Airport). 399 nonstop flights in Jun 2025 to May 2026, 87% arrived within 15 minutes and 2.5% were cancelled. The most reliable flight number was Republic 3527 at 10:34 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BUF → EWR
Buffalo to Newark: 399 nonstop flights a year
On time (12 months)
87%
Cancelled
2.5%
avg delay 13 min
Best time to leave
Before 9 AM
89% on time vs 82% 6 to 9 PM
Most reliable airline
United
87% chance on time
Lowest nonstop fare seen in the next two months: $123 (United 4405 on 2026-10-23). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Republic 3527 · sold as American Eagle, Delta Connection or United Express
10:34 AM → 11:59 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Republic 3444; its record covers all of them.
87%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 16 min
- Arrived on time 89% of the time (80 flights, Jun 2025 to May 2026).
- Never cancelled in 80 scheduled flights.
- 62% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 80 flights
Find 10:34 AM flight fares Opens this date on Aviasales#2 · Republic 3420 · sold as American Eagle, Delta Connection or United Express
6:00 AM → 7:25 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-30. Same departure also flew as Republic 3489, 3521; its record covers all of them.
86%
chance on time
- On time (history)
- 90%
- Cancelled
- 3.4%
- Avg arrival delay
- 13 min
- Arrived on time 90% of the time (84 flights, Jun 2025 to May 2026).
- Cancelled 3.4% of the time (3 of 87).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 82%).
Moderate track record · 84 flights
Find 6:00 AM flight fares Opens this date on Aviasales#3 · Republic 3716 · sold as American Eagle, Delta Connection or United Express
7:00 PM → 8:31 PM1h 31m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Republic 3442; its record covers all of them.
78%
chance on time
- On time (history)
- 80%
- Cancelled
- 6.8%
- Avg arrival delay
- 8 min
- Arrived on time 80% of the time (41 flights, Jun 2025 to May 2026).
- Cancelled 6.8% of the time (3 of 44).
- Leaves in this route's least on-time window (6 to 9 PM: 82% on time; Before 9 AM: 89%).
- Short track record (41 flights), so its score leans on the airline's record at this hour.
Limited track record · 41 flights
Find 7:00 PM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines87%
123 flights · 88% on time as flown · 2.1% cancel
- Republic Airways (sold as American Eagle, Delta Connection or United Express)84%
276 flights · 87% on time as flown · 2.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
245 flights · avg delay 13 min
- 9 AM to noon88%
87 flights · avg delay 11 min
- 6 to 9 PM82%
49 flights · avg delay 7 min
Best day: Tuesday (91%). Worst: Friday (85%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)63%
- Late-arriving aircraft28%
- Air traffic control and airport volume9%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
BUF to EWR questions
- What time of day is best to fly BUF to EWR?
- Before 9 AM: 89% of flights arrived on time, against 82% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from BUF to EWR?
- United, with a season-adjusted 87% chance of operating and arriving on time over 123 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on BUF to EWR?
- June (75% on time); the best was January (94%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from BUF
- EWR to BUF (return)
- BUF to ORD 73%
- BUF to LGA 77%
- BUF to MCO 76%
- BUF to BWI 86%
- BUF to ATL 80%
- BUF to CLT 78%
- BUF to JFK 79%
- BUF to DCA 65%
- BUF to BOS 74%
- BUF to DTW 81%
- BUF to MDW 78%
- BUF to TPA 77%
Live status: FAA delays and ground stops