Route on-time record

BOS to BUF: most on-time flights and the best time to fly

Boston (Boston Logan International Airport) to Buffalo (Buffalo Niagara International Airport). 1,168 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 1.9% were cancelled. The most reliable flight number was Envoy 3539 at 11:40 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

BOS → BUF

Boston to Buffalo: 1,168 nonstop flights a year

On time (12 months)

75%

Cancelled

1.9%

avg delay 18 min

Best time to leave

Before 9 AM

86% on time vs 63% 6 to 9 PM

Most reliable airline

Envoy

79% chance on time

Check BOS to BUF fares

Lowest nonstop fare seen in the next two months: $105 (JetBlue 715 on 2026-10-27). 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 · Envoy 3539 · sold as American Eagle
11:40 AM → 1:27 PM1h 47m nonstop
Local times, typical schedule. Last flown 2026-04-05.
88%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
0 min
- Arrived on time 100% of the time (13 flights, Jun 2025 to May 2026).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find 11:40 AM flight fares Opens this date on Aviasales
#2 · Envoy 4055 · sold as American Eagle
8:00 AM → 9:47 AM1h 47m nonstop
Local times, typical schedule. Last flown 2026-04-06.
86%
chance on time
On time (history)
95%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 95% of the time (21 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 63%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find 8:00 AM flight fares Opens this date on Aviasales
#3 · Republic 4774 · sold as American Eagle, Delta Connection or United Express
2:45 PM → 4:32 PM1h 47m nonstop
Local times, typical schedule. Last flown 2026-05-20.
84%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 91% of the time (35 flights, Jun 2025 to May 2026).
- Never cancelled in 35 scheduled flights.
- Departs inside BOS's trouble window: 79% of its 196 ground stops and delay programs started between noon and 6 PM.
- Short track record (35 flights), so its score leans on the airline's record at this hour.
Limited track record · 35 flights
Find 2:45 PM flight fares Opens this date on Aviasales
#4 · JetBlue 1215
11:00 AM → 12:35 PM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
On time (history)
86%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 86% of the time (148 flights, Jun 2025 to May 2026).
- Never cancelled in 148 scheduled flights.
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
Moderate track record · 148 flights
Find JetBlue 1215 fares Opens this date on Aviasales
#5 · Republic 4666 · sold as American Eagle, Delta Connection or United Express
9:03 AM → 10:52 AM1h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 100% of the time (10 flights, Jun 2025 to May 2026).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find 9:03 AM flight fares Opens this date on Aviasales
#6 · JetBlue 2115
8:29 AM → 10:00 AM1h 32m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
On time (history)
93%
Cancelled
3.4%
Avg arrival delay
9 min
- Arrived on time 93% of the time (28 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 63%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find JetBlue 2115 fares Opens this date on Aviasales
#7 · Republic 4500 · sold as American Eagle, Delta Connection or United Express
9:31 AM → 11:17 AM1h 46m nonstop
Local times, typical schedule. Last flown 2026-05-20.
78%
chance on time
On time (history)
82%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 82% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- Short track record (44 flights), so its score leans on the airline's record at this hour.
Limited track record · 44 flights
Find 9:31 AM flight fares Opens this date on Aviasales
#8 · Republic 4616 · sold as American Eagle, Delta Connection or United Express
8:00 PM → 9:50 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
On time (history)
82%
Cancelled
0.0%
Avg arrival delay
13 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 63% on time; Before 9 AM: 86%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- 97% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 11 flights
Find 8:00 PM flight fares Opens this date on Aviasales
#9 · Envoy 3622 · sold as American Eagle
6:40 PM → 8:29 PM1h 49m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
On time (history)
64%
Cancelled
0.0%
Avg arrival delay
35 min
- Arrived on time 64% of the time (22 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 63% on time; Before 9 AM: 86%).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- 77% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 22 flights
Find 6:40 PM flight fares Opens this date on Aviasales
#10 · JetBlue 1115
11:57 AM → 1:32 PM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
On time (history)
74%
Cancelled
2.2%
Avg arrival delay
21 min
- Arrived on time 74% of the time (180 flights, Jun 2025 to May 2026).
- Departs outside BOS's trouble window (noon to 6 PM, when 79% of its 196 ground stops and delay programs started).
- 66% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 180 flights
Find JetBlue 1115 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Envoy Air (sold as American Eagle)79%
63 flights · 83% on time as flown · 1.3% cancel
Republic Airways (sold as American Eagle, Delta Connection or United Express)77%
139 flights · 84% on time as flown · 1.3% cancel
JetBlue72%
966 flights · 73% on time as flown · 2.1% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM86%
195 flights · avg delay 9 min
9 AM to noon82%
268 flights · avg delay 10 min
Noon to 3 PM84%
119 flights · avg delay 14 min
3 to 6 PM70%
281 flights · avg delay 25 min
6 to 9 PM63%
296 flights · avg delay 27 min

Best day: Tuesday (85%). Worst: Friday (72%).

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

Late-arriving aircraft61%
Airline (crew, maintenance, boarding)26%
Air traffic control and airport volume10%
Severe weather3%

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

BOS to BUF questions

What time of day is best to fly BOS to BUF?: Before 9 AM: 86% of flights arrived on time, against 63% 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 BOS to BUF?: Envoy, with a season-adjusted 79% chance of operating and arriving on time over 63 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 BOS to BUF?: January (65% on time); the best was April (87%), 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 BOS

Live status: FAA delays and ground stops

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