Airports › Boston (BOS) › December 2025
Airport month · December 2025
Logan International in December 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In December 2025, reporting carriers scheduled 11,248 domestic departures from Logan International (BOS). 71.7% left less than 15 minutes late and 67.3% reached their destination on time; 1.7% were cancelled.
Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so BOS departures were level with the national departure figure.
A year earlier, in December 2024, the airport had 11,778 departures with 75.3% leaving on time: a change of −3.6 points, with flights down 4%.
Flights arriving at BOS that month were on time 71.7% of the time (11,243 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 37%, air carrier 31% and national aviation system 30%.
- On time 67.3%
- Arrived 15+ minutes late 30.7%
- Cancelled 1.7%
- Diverted 0.2%
December 2025 against a year earlier, the airport's year and the nation
| Measure | Dec 2025 | Dec 2024 | BOS, 12 months to Jul 2026 | All reported flights, Dec 2025 |
|---|---|---|---|---|
| Departed on time | 71.7% | 75.3% | 74.4% | 72.0% |
| Arrived on time | 67.3% | 74.3% | 73.3% | 71.9% |
| Cancelled | 1.7% | 1.4% | 2.8% | 1.5% |
| Average departure delay (late minutes only) | 21.2 min | 18.3 min | 18.3 min | 21.2 min |
| Scheduled departures a day | 375 | 393 | 393 | 19,410 |
| Scheduled departures | 11,248 | 11,778 | 143,447 | 582,304 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| B6 JetBlue Airways | 3,066 | 27% | 58.6% | 22.8 min | 2.3% |
| YX Republic Airline | 2,554 | 23% | 73.1% | 9.4 min | 1.8% |
| DL Delta Air Lines | 2,241 | 20% | 65.1% | 18.2 min | 2.6% |
| AA American Airlines | 1,284 | 11% | 76.1% | 11.2 min | 0.3% |
| UA United Airlines | 970 | 9% | 77.3% | 7.2 min | 0.3% |
| WN Southwest Airlines | 567 | 5% | 71.1% | 10.0 min | 0.5% |
| AS Alaska Airlines | 198 | 2% | 46.0% | 24.8 min | 1.0% |
| NK Spirit Airlines | 127 | 1% | 59.8% | 31.9 min | 0.0% |
| MQ Envoy Air | 114 | 1% | 68.4% | 13.1 min | 0.9% |
| F9 Frontier Airlines | 77 | 1% | 48.1% | 36.5 min | 5.2% |
| G4 Allegiant Air | 50 | 0% | 78.0% | 9.2 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| BOS–DCA | Boston to Washington | 689 | 69.1% | 14.5 min | 1.2% |
| BOS–ORD | Boston to Chicago | 556 | 69.2% | 19.7 min | 0.7% |
| BOS–LGA | Boston to New York | 506 | 71.5% | 11.4 min | 5.7% |
| BOS–MCO | Boston to Orlando | 436 | 59.6% | 28.5 min | 1.6% |
| BOS–JFK | Boston to New York | 430 | 67.9% | 15.1 min | 4.0% |
| BOS–ATL | Boston to Atlanta | 417 | 67.1% | 15.8 min | 2.6% |
| BOS–LAX | Boston to Los Angeles | 381 | 61.2% | 23.9 min | 1.3% |
| BOS–FLL | Boston to Fort Lauderdale | 366 | 51.9% | 35.3 min | 2.2% |
| BOS–PHL | Boston to Philadelphia | 364 | 74.5% | 10.4 min | 1.6% |
| BOS–SFO | Boston to San Francisco | 357 | 63.6% | 17.1 min | 0.8% |
| BOS–CLT | Boston to Charlotte | 331 | 83.1% | 0.7 min | 0.3% |
| BOS–DEN | Boston to Denver | 301 | 72.8% | 9.0 min | 0.7% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left BOS on time in December 2025?
71.7% of 11,248 scheduled domestic departures left less than 15 minutes late, and 67.3% reached their destination on time. The national figures that month were 72.0% and 71.9%.
How does that compare with a year earlier?
In December 2024, 75.3% of 11,778 departures left on time and 1.4% were cancelled, against 71.7% and 1.7% in December 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for BOS · methodology · corrections.