FlightRecord

Boston Logan International Airport (BOS): Delays & On-Time Performance

Data through May 2026

Boston Logan International Airport (BOS) in Boston, MA is a middle-of-the-pack performer: 78% of departures are on time, within a few points of the national 78%. It hosts 13 airlines flying 391 departures a day to 86 destinations, with cancellations at 2%.

Departures on-time
78%
left <15 min late
Avg dep delay
17 min
Arrivals on-time
75%
Cancelled
2.0%
Destinations
86
nonstop
Airlines
13

Monthly on-time trend

Monthly departure on-time percentage at BOS50%75%100%June 2024: 76% on-time (12,568 flights)76Jun 2024July 2024: 73% on-time (12,953 flights)73August 2024: 73% on-time (13,215 flights)73September 2024: 84% on-time (12,359 flights)84Sep 2024October 2024: 87% on-time (13,035 flights)87November 2024: 86% on-time (11,756 flights)86December 2024: 76% on-time (11,778 flights)76Dec 2024January 2025: 85% on-time (10,624 flights)85February 2025: 78% on-time (10,292 flights)78March 2025: 82% on-time (12,361 flights)82Mar 2025April 2025: 83% on-time (12,413 flights)83May 2025: 76% on-time (12,547 flights)76June 2025: 75% on-time (12,372 flights)75Jun 2025July 2025: 72% on-time (12,912 flights)72August 2025: 80% on-time (12,461 flights)80September 2025: 74% on-time (11,597 flights)74Sep 2025October 2025: 72% on-time (12,647 flights)72November 2025: 80% on-time (11,385 flights)80December 2025: 73% on-time (11,248 flights)73Dec 2025January 2026: 78% on-time (10,298 flights)78February 2026: 76% on-time (10,232 flights)76March 2026: 76% on-time (12,299 flights)76Mar 2026April 2026: 80% on-time (12,626 flights)80May 2026: 82% on-time (12,694 flights)82

Best time of day to depart from BOS

On-time percentage by scheduled departure hour at BOS5 a.m.: 93% on-time (9,608 flights)56 a.m.: 92% on-time (23,451 flights)67 a.m.: 90% on-time (28,149 flights)78 a.m.: 88% on-time (22,925 flights)89 a.m.: 87% on-time (19,036 flights)910 a.m.: 84% on-time (17,003 flights)1011 a.m.: 83% on-time (16,249 flights)1112 p.m.: 80% on-time (14,504 flights)121 p.m.: 80% on-time (13,566 flights)132 p.m.: 77% on-time (13,883 flights)143 p.m.: 72% on-time (18,749 flights)154 p.m.: 68% on-time (17,904 flights)165 p.m.: 68% on-time (19,183 flights)176 p.m.: 64% on-time (18,047 flights)187 p.m.: 63% on-time (16,528 flights)198 p.m.: 59% on-time (15,155 flights)209 p.m.: 61% on-time (4,181 flights)2110 p.m.: 64% on-time (537 flights)22scheduled departure hour

Busiest routes from BOS

RouteFlights/12moOn-timeAvg delay
BOS → DCA9,07176%19 min
BOS → ORD7,55675%20 min
BOS → LGA7,14780%15 min
BOS → JFK5,75677%18 min
BOS → PHL4,91377%20 min
BOS → ATL4,90378%16 min
BOS → LAX4,65578%19 min
BOS → MCO4,64471%22 min

Most reliable routes

  1. BOS → TVC89%
  2. BOS → SDF88%
  3. BOS → ILM87%
  4. BOS → TYS86%
  5. BOS → AVL86%

Most delay-prone routes

  1. BOS → DAL58%
  2. BOS → SYR67%
  3. BOS → PBI67%
  4. BOS → MEM67%
  5. BOS → SJU68%

Airline performance at BOS

AirlineOn-time departuresAvg delayFlights
Allegiant Air88%11 min1,228
United Airlines83%15 min25,586
Republic Airways82%13 min62,166
Envoy Air80%16 min4,007
American Airlines79%20 min33,282
Delta Air Lines79%17 min52,042
Hawaiian Airlines78%21 min334
Alaska Airlines78%14 min5,031
JetBlue Airways75%19 min78,953
Frontier Airlines74%22 min2,801
Southwest Airlines72%19 min13,805
Spirit Airlines71%24 min9,435

Frequently asked questions

How often are flights delayed at BOS?
22% of departures from Boston Logan International Airport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 17 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from BOS?
Flights scheduled around 5 a.m. depart on time 93% of the time at BOS, versus 59% around 8 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at BOS?
In this dataset, October 2025 was the weakest month at BOS, with 72% of departures on time.
How often are flights cancelled at BOS?
2% of scheduled departures from BOS were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 288,672 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.