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Airport · 12 months to July 2026
Logan International: delays and on-time record
Boston, Massachusetts
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. Data through July 2026; this is a monthly history, not live airport status.
Reporting carriers scheduled 143,447 domestic departures from Logan International (BOS), Boston, in the 12 months to July 2026: about 393 a day to 83 destinations.
74.4% of those flights left the gate less than 15 minutes late, 1.7 points below the national departure figure of 76.1%. Flights arriving at BOS were on time 71.2% of the time, 4.8 points below the national arrival figure of 76.0%.
2.8% of scheduled departures were cancelled (national: 1.8%), and the average departure delay, counting early and on-time departures as zero, was 18.3 min.
JetBlue Airways is the largest reporting carrier at BOS with 26% of departures. Among carriers with at least 1,434 departures, Envoy Air had the highest on-time arrival share for its BOS departures (78.2%) and Spirit Airlines the lowest (60.8%).
On-time departures are down 4.0 points on the previous 12 months (78.4%).
Of the delay minutes that carriers assigned to a BTS cause category for flights leaving BOS, late-arriving aircraft 43%, air carrier 29% and national aviation system 26%.
- On time 73.3%
- Arrived 15+ minutes late 23.6%
- Cancelled 2.8%
- Diverted 0.3%
As origin and as destination, against the nation
| Measure | Departures from BOS | Arrivals at BOS | All reported flights | BOS departures, previous 12 months |
|---|---|---|---|---|
| Departed on time (less than 15 min late) | 74.4% | 71.4% | 76.1% | 78.4% |
| Arrived on time | 73.3% | 71.2% | 76.0% | 76.8% |
| Cancelled | 2.8% | 2.8% | 1.8% | 1.5% |
| Diverted | 0.3% | 0.1% | 0.3% | 0.2% |
| Average departure delay (late minutes only) | 18.3 min | 21.0 min | 17.4 min | 16.1 min |
| Arrival delay minutes per 100 flights | 1,788 | 2,030 | 1,684 | 1,616 |
| Scheduled flights | 143,447 | 143,441 | 7,043,858 | 145,664 |
12 months to July 2026. The first column follows flights that left BOS; the second follows flights that landed there. Year on year, on-time departures moved −4.0 pts.
Airlines at BOS
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| B6 JetBlue Airways | 37,422 | 26% | 69.3% | 10.9 min | 3.0% |
| YX Republic Airline | 34,144 | 24% | 74.8% | 4.7 min | 4.0% |
| DL Delta Air Lines | 26,458 | 18% | 75.1% | 7.7 min | 2.1% |
| AA American Airlines | 17,113 | 12% | 76.3% | 7.7 min | 2.6% |
| UA United Airlines | 12,960 | 9% | 77.0% | 6.6 min | 1.9% |
| WN Southwest Airlines | 7,248 | 5% | 69.4% | 11.8 min | 1.6% |
| AS Alaska Airlines | 2,443 | 2% | 71.0% | 6.0 min | 1.1% |
| MQ Envoy Air | 2,035 | 1% | 78.2% | 5.1 min | 2.2% |
| NK Spirit Airlines | 2,019 | 1% | 60.8% | 21.9 min | 5.2% |
| F9 Frontier Airlines | 930 | 1% | 67.6% | 10.9 min | 1.7% |
| G4 Allegiant Air | 607 | 0% | 83.0% | 4.1 min | 0.7% |
| HA Hawaiian Airlines | 68 | 0% | 72.1% | 9.5 min | 1.5% |
Departures from BOS by reporting carrier, ordered by flights; on time means the flight reached its destination less than 15 minutes late. Green is at or above the airport's overall share of 73.3%. Carriers fly different routes at different hours, so the rows are not a like-for-like test.
Busiest routes from BOS
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| BOS–DCA | Boston to Washington | 9,092 | 70.6% | 11.1 min | 3.8% |
| BOS–ORD | Boston to Chicago | 7,750 | 70.5% | 14.2 min | 3.0% |
| BOS–LGA | Boston to New York | 7,342 | 72.7% | 8.1 min | 5.8% |
| BOS–JFK | Boston to New York | 5,672 | 71.7% | 8.2 min | 4.8% |
| BOS–PHL | Boston to Philadelphia | 4,981 | 74.1% | 10.3 min | 3.1% |
| BOS–ATL | Boston to Atlanta | 4,973 | 76.0% | 6.1 min | 2.2% |
| BOS–LAX | Boston to Los Angeles | 4,758 | 73.6% | 10.3 min | 1.7% |
| BOS–SFO | Boston to San Francisco | 4,735 | 70.2% | 9.3 min | 1.5% |
| BOS–MCO | Boston to Orlando | 4,620 | 68.1% | 14.3 min | 3.0% |
| BOS–CLT | Boston to Charlotte | 4,019 | 80.7% | 0.6 min | 2.6% |
| BOS–DEN | Boston to Denver | 3,868 | 75.7% | 4.6 min | 1.3% |
| BOS–EWR | Boston to Newark | 3,866 | 72.3% | 10.2 min | 4.1% |
| BOS–DFW | Boston to Dallas/Fort Worth | 3,706 | 73.9% | 6.4 min | 3.2% |
| BOS–BWI | Boston to Baltimore | 3,513 | 76.6% | 4.9 min | 2.7% |
| BOS–MIA | Boston to Miami | 3,384 | 76.7% | 4.3 min | 2.1% |
| BOS–FLL | Boston to Fort Lauderdale | 3,359 | 64.3% | 16.3 min | 3.6% |
| BOS–BNA | Boston to Nashville | 2,934 | 68.7% | 12.3 min | 2.1% |
| BOS–RDU | Boston to Raleigh/Durham | 2,828 | 73.4% | 7.9 min | 2.7% |
| BOS–TPA | Boston to Tampa | 2,791 | 72.6% | 8.1 min | 2.8% |
| BOS–DTW | Boston to Detroit | 2,583 | 75.3% | 8.1 min | 2.4% |
| BOS–SEA | Boston to Seattle | 2,504 | 71.2% | 6.4 min | 1.3% |
| BOS–RSW | Boston to Fort Myers | 2,193 | 68.5% | 11.4 min | 2.7% |
| BOS–PIT | Boston to Pittsburgh | 2,156 | 75.6% | 4.8 min | 3.0% |
| BOS–PBI | Boston to West Palm Beach/Palm Beach | 2,153 | 63.0% | 17.7 min | 3.4% |
| BOS–IND | Boston to Indianapolis | 2,022 | 79.5% | -0.4 min | 2.4% |
| BOS–IAH | Boston to Houston | 2,021 | 79.5% | -0.9 min | 1.7% |
| BOS–PHX | Boston to Phoenix | 2,017 | 75.8% | 6.2 min | 1.6% |
| BOS–CMH | Boston to Columbus | 2,003 | 78.3% | 2.8 min | 2.6% |
| BOS–CVG | Boston to Cincinnati | 2,000 | 78.0% | 2.1 min | 2.9% |
| BOS–MSP | Boston to Minneapolis | 1,853 | 81.7% | 2.6 min | 1.3% |
| BOS–SAN | Boston to San Diego | 1,849 | 75.0% | 2.0 min | 1.6% |
| BOS–SJU | Boston to San Juan | 1,770 | 65.3% | 18.4 min | 2.9% |
| BOS–RIC | Boston to Richmond | 1,694 | 74.1% | 4.5 min | 3.2% |
| BOS–AUS | Boston to Austin | 1,673 | 70.3% | 10.6 min | 2.2% |
| BOS–CLE | Boston to Cleveland | 1,650 | 75.3% | 5.6 min | 2.7% |
| BOS–STL | Boston to St. Louis | 1,612 | 74.6% | 6.4 min | 1.6% |
| BOS–JAX | Boston to Jacksonville | 1,610 | 73.1% | 7.2 min | 2.7% |
| BOS–LAS | Boston to Las Vegas | 1,609 | 74.3% | 5.6 min | 1.2% |
| BOS–IAD | Boston to Washington | 1,516 | 81.2% | 5.3 min | 2.7% |
| BOS–MDW | Boston to Chicago | 1,361 | 70.5% | 11.1 min | 1.9% |
| BOS–BUF | Boston to Buffalo | 1,295 | 73.2% | 6.9 min | 3.0% |
| BOS–SLC | Boston to Salt Lake City | 1,256 | 74.0% | 9.0 min | 1.8% |
| BOS–CHS | Boston to Charleston | 1,140 | 75.7% | 6.1 min | 2.3% |
| BOS–SAV | Boston to Savannah | 1,044 | 78.7% | 1.3 min | 2.1% |
| BOS–MSY | Boston to New Orleans | 855 | 75.2% | 7.7 min | 1.8% |
| BOS–MKE | Boston to Milwaukee | 741 | 80.0% | 0.4 min | 3.1% |
| BOS–SDF | Boston to Louisville | 708 | 83.6% | -3.1 min | 1.6% |
| BOS–SRQ | Boston to Sarasota/Bradenton | 685 | 69.8% | 11.7 min | 3.1% |
| BOS–PDX | Boston to Portland | 671 | 76.2% | 1.9 min | 1.9% |
| BOS–MCI | Boston to Kansas City | 646 | 76.0% | 3.2 min | 2.3% |
| BOS–ORF | Boston to Norfolk | 474 | 85.9% | -2.4 min | 1.1% |
| BOS–SYR | Boston to Syracuse | 474 | 67.3% | 12.9 min | 2.1% |
| BOS–MYR | Boston to Myrtle Beach | 439 | 69.9% | 8.9 min | 5.2% |
| BOS–ILM | Boston to Wilmington | 433 | 81.3% | 0.8 min | 0.5% |
| BOS–ROC | Boston to Rochester | 385 | 76.1% | 2.8 min | 3.1% |
| BOS–PQI | Boston to Presque Isle/Houlton | 365 | 63.6% | 17.0 min | 2.5% |
| BOS–SAT | Boston to San Antonio | 356 | 75.3% | 7.9 min | 2.2% |
| BOS–STT | Boston to Charlotte Amalie | 318 | 70.1% | 14.2 min | 4.4% |
| BOS–MEM | Boston to Memphis | 294 | 64.6% | 9.5 min | 5.4% |
| BOS–ACK | Boston to Nantucket | 284 | 81.0% | -0.3 min | 2.5% |
| BOS–DAL | Boston to Dallas | 260 | 49.2% | 30.8 min | 0.8% |
| BOS–TVC | Boston to Traverse City | 240 | 84.6% | 6.4 min | 1.3% |
| BOS–DAB | Boston to Daytona Beach | 240 | 72.5% | 8.3 min | 2.5% |
| BOS–VRB | Boston to Vero Beach | 233 | 74.2% | 2.2 min | 3.9% |
| BOS–EYW | Boston to Key West | 221 | 70.6% | 8.2 min | 1.8% |
| BOS–AVL | Boston to Asheville | 219 | 88.1% | -2.2 min | 0.9% |
| BOS–BZN | Boston to Bozeman | 207 | 66.2% | 11.3 min | 5.3% |
| BOS–TYS | Boston to Knoxville | 147 | 85.0% | -2.9 min | 0.0% |
| BOS–VPS | Boston to Valparaiso | 143 | 76.2% | 1.8 min | 0.7% |
The 69 busiest of 83 routes with reported flights. Routes with at least 10 flights a month have their own page.
Month by month
By scheduled departure hour
Among hours with at least 2,869 departures, 5 am to 6 am had the highest on-time share (91.1% of 4,258 flights) and 7 pm to 8 pm the lowest (54.8% of 7,873).
Delay causes
Cancellations by reported reason (4,040 in the period): air carrier 25%, weather 49%, national aviation system 26%, security 0%.
Checkpoint volumes
TSA publishes daily checkpoint passenger counts for the country as a whole, not for BOS on its own. The national series through September 2026 is on the checkpoint volumes page.
Questions and answers
How often do flights leave BOS on time?
74.4% of the 143,447 scheduled domestic departures in the 12 months to July 2026 left less than 15 minutes late; the national figure was 76.1%. 2.8% were cancelled.
How often do flights arrive at BOS on time?
71.2% of 143,441 scheduled arrivals were on time by the BTS definition, against 76.0% nationally.
Which airline has the highest on-time share at BOS?
Counting departures from BOS and whether they reached their destination on time, Envoy Air had the highest share (78.2% of 2,035 flights), then United Airlines (77.0%) and American Airlines (76.3%). Carriers fly different routes at different hours, so the figures are not a like-for-like test.
What causes delays at BOS?
For departures from BOS that reached their destination 15 or more minutes late, carriers attributed the delay minutes as follows: late-arriving aircraft 43%, air carrier 29%, national aviation system 26%, extreme weather 3%, security 0%.
What time of day has the highest on-time share at BOS?
Departures scheduled from 5 am to 6 am local time left on time 91.1% of the time, the highest of any hour with enough flights to compare; 7 pm to 8 pm was lowest at 54.8%.
Is it getting better?
On-time departures for the 12 months to July 2026 were 74.4%, down 4.0 points on the previous 12 months (78.4%). The monthly chart shows each of the last 36 months, and each month has its own page.
Does this page show today's delays at BOS?
No. BTS publishes on-time records about two months after the month ends, so this page is a monthly history through July 2026. For live conditions use the FAA airport status service or your airline.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026; airport name from the BTS airport lookup table. US government works in the public domain. Domestic scheduled flights by reporting carriers only: international flights, charters and smaller carriers are not in the source. Totals and averages only; no individual flight or aircraft is identified. See the methodology; report processing errors through corrections.