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
Plan your departure from BOS
The choices most likely to improve your odds, based on this airport’s historical record.
- Best departure time
- Around 5 a.m.
- 93% on-time
- Best day to fly
- Tuesday
- 81% on-time
- Cancellation risk
- 2.0%
- above the US average
Monthly on-time trend
Best time of day to depart from BOS
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 19 min |
| Tuesdaybest | 81% | 14 min |
| Wednesday | 81% | 14 min |
| Thursday | 74% | 19 min |
| Friday | 75% | 19 min |
| Saturday | 79% | 16 min |
| Sunday | 73% | 21 min |
Busiest routes from BOS
Where flights into BOS come from
| Route | Flights/12mo | On-time | Avg delay |
|---|---|---|---|
| DCA (Washington) → BOS | 9,071 | 75% | 21 min |
| ORD (Chicago) → BOS | 7,561 | 72% | 22 min |
| LGA (New York) → BOS | 7,148 | 78% | 17 min |
| JFK (New York) → BOS | 5,761 | 75% | 21 min |
| PHL (Philadelphia) → BOS | 4,909 | 76% | 19 min |
| ATL (Atlanta) → BOS | 4,904 | 75% | 17 min |
| LAX (Los Angeles) → BOS | 4,659 | 80% | 15 min |
| MCO (Orlando) → BOS | 4,646 | 73% | 21 min |
What causes delays at BOS
Share of total delay minutes by cause, as reported by carriers to the US DOT, weighted across routes departing BOS.
- Late-arriving aircraft39%
- Airline operations31%
- National airspace system27%
- Weather3%
Alternative airports near Boston
Other airports within 120 miles, compared on departure reliability.
| Airport | Distance | On-time departures | Avg delay |
|---|---|---|---|
| ORH — Worcester Regional Airport | 45 mi | 79% | 23 min |
| MHT — Manchester-Boston Regional Airport | 45 mi | 82% | 16 min |
| PVD — Rhode Island T. F. Green International Airport | 49 mi | 82% | 16 min |
| MVY — Martha's Vineyard Airport | 70 mi | 77% | 24 min |
| ACK — Nantucket Memorial Airport | 91 mi | 79% | 20 min |
Compare the airport-level record first, then check the exact route you plan to book.
Airline performance at BOS
| Airline | On-time departures | Avg delay | Flights |
|---|---|---|---|
| Allegiant Air | 88% | 11 min | 1,228 |
| United Airlines | 83% | 15 min | 25,586 |
| Republic Airways | 82% | 13 min | 62,166 |
| Envoy Air | 80% | 16 min | 4,007 |
| American Airlines | 79% | 20 min | 33,282 |
| Delta Air Lines | 79% | 17 min | 52,042 |
| Hawaiian Airlines | 78% | 21 min | 334 |
| Alaska Airlines | 78% | 14 min | 5,031 |
| JetBlue Airways | 75% | 19 min | 78,953 |
| Frontier Airlines | 74% | 22 min | 2,801 |
| Southwest Airlines | 72% | 19 min | 13,805 |
| Spirit Airlines | 71% | 24 min | 9,435 |
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
Related guides
Based on 288,672 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.