Airport month record
BOSAPR
Boston Logan International in April 2026
- Departures
- 12,626
- Month
- April 2026
- National, same month
- 79.8%
- Carriers
- 11
Historical statistics for April 2026, not live status or a forecast for this year’s April. For today’s conditions at BOS, see live FAA status.
BOS in April lands a B+, level with the national rate of 79.8%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 12,626 flights, of which United Airlines flew 1,063 at 86.5% on time.
United Airlines is the most reliable of the six carriers covered here at 86.5% on time across 1,063 flights.
Key figures
On time
79.3%
Arrivals under 15 minutes late, of 12,558 completed departures
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
0.31%
Nationally in April: 0.90%
Whole year
74.6%
BOS across all twelve months
These figures cover 12,626 departures from Boston Logan International in April 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
April next to BOS's other months
Against BOS's own year, April ran 5 points better than the twelve-month rate of 74.6%, which makes it number two of twelve months, best first. Cancellations were unusually low for BOS in April, at 0.31% against 3.05% across the year. Either side of it, March ran 74.1% on time and May 79.4%, so a trip moved by a few weeks would have landed in a worse stretch.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| September 2025 | 11,597 | 75.7% | 73 min | 1.35% | B |
| October 2025 | 12,647 | 73.9% | 75 min | 1.51% | C |
| November 2025 | 11,385 | 78.0% | 75 min | 2.76% | B |
| December 2025 | 11,248 | 68.7% | 71 min | 1.69% | C |
| January 2026 | 10,298 | 73.6% | 78 min | 7.50% | C− |
| February 2026 | 10,232 | 74.8% | 73 min | 8.15% | C− |
| March 2026 | 12,299 | 74.1% | 69 min | 2.69% | C |
| April 2026 (this page) | 12,626 | 79.3% | 62 min | 0.31% | B+ |
| May 2026 | 12,694 | 79.4% | 60 min | 0.61% | B+ |
| June 2026 | 12,683 | 76.6% | 72 min | 1.77% | B |
| July 2026 | 13,277 | 70.8% | 83 min | 5.92% | C− |
| August 2026 | 13,188 | 69.8% | 82 min | 3.60% | C− |
Departure window
The best time of day to leave BOS in April
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against 11 points between the best and worst carrier.
- 5am–8am2,416 flights90.3%
- 8am–11am2,539 flights87.5%
- 11am–2pm1,846 flights83.4%
- 2pm–5pm2,422 flights75.5%
- 5pm–8pm2,219 flights67.3%
- 8pm–5am1,184 flights63.4%
Scale runs 55% to 95%.
The 8pm–5am window is where this operation falls apart: 63.4% on time, against 90.3% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 2,539 flights scheduled in it.
Across the week, Saturday is the strongest day at 86.0% on time and Sunday the weakest at 69.6%, a spread of 16 points.
Carrier by carrier
Which airlines ran best at BOS in April
The choice of carrier is not cosmetic here. United Airlines arrives on time 86.5% of the time; Southwest Airlines manages 75.1%. Sample sizes sit next to every figure, because a two-point gap across 608 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| JetBlue Airways | 3,310 | 75.8% | 56 min | 0.00% | B+ |
| Republic Airways | 3,083 | 80.7% | 59 min | 0.26% | B+ |
| Delta Air Lines | 2,299 | 81.3% | 61 min | 0.52% | B+ |
| American Airlines | 1,481 | 83.0% | 90 min | 0.61% | B+ |
| United Airlines | 1,063 | 86.5% | 65 min | 0.19% | A+ |
| Southwest Airlines | 608 | 75.1% | 56 min | 0.00% | B+ |
| Spirit Airlinesthin sample | 307 | 57.3% | 75 min | 1.63% | D |
| Alaska Airlinesthin sample | 161 | 78.3% | 49 min | 0.00% | B+ |
| Envoy Airthin sample | 147 | 82.6% | 76 min | 1.36% | B |
| Frontier Airlinesthin sample | 107 | 66.3% | 46 min | 0.93% | C+ |
| Allegiant Airthin sample | 60 | 88.3% | 38 min | 0.00% | A+ |
United leads Southwest by 11 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Route by route
Busiest routes out of BOS in April
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| BOS to DCA · Washington | 783 | 78.3% | 68 min | 0.26% | B+ |
| BOS to LGA · New York | 642 | 78.8% | 70 min | 0.47% | B+ |
| BOS to ORD · Chicago | 641 | 77.1% | 76 min | 2.18% | B |
| BOS to MCO · Orlando | 520 | 73.5% | 68 min | 0.38% | C+ |
| BOS to ATL · Atlanta | 445 | 80.5% | 54 min | 0.67% | B+ |
| BOS to JFK · New York | 440 | 78.4% | 62 min | 0.00% | B+ |
| BOS to PHL · Philadelphia | 419 | 76.1% | 101 min | 0.00% | B+ |
| BOS to SFO · San Francisco | 381 | 69.9% | 55 min | 0.26% | C+ |
| BOS to FLL · Fort Lauderdale | 367 | 68.3% | 57 min | 0.27% | C+ |
| BOS to LAX · Los Angelesthin sample | 362 | 78.7% | 60 min | 0.28% | B+ |
| BOS to EWR · Newarkthin sample | 348 | 84.8% | 44 min | 0.00% | B+ |
| BOS to CLT · Charlottethin sample | 339 | 90.6% | 52 min | 0.00% | A+ |
| BOS to MIA · Miamithin sample | 334 | 76.0% | 71 min | 0.00% | B+ |
| BOS to BWI · Baltimorethin sample | 322 | 80.1% | 66 min | 0.00% | B+ |
| BOS to TPA · Tampathin sample | 303 | 81.5% | 55 min | 0.33% | B+ |
| BOS to DFW · Dallas-Fort Worththin sample | 302 | 81.4% | 66 min | 0.99% | B+ |
| BOS to RSW · Fort Myersthin sample | 298 | 73.6% | 50 min | 0.34% | C+ |
| BOS to DEN · Denverthin sample | 284 | 84.5% | 52 min | 0.00% | B+ |
| BOS to RDU · Raleighthin sample | 245 | 83.1% | 59 min | 0.41% | B+ |
| BOS to BNA · Nashvillethin sample | 239 | 72.0% | 54 min | 0.00% | C+ |
| BOS to PBI · West Palm Beachthin sample | 236 | 71.5% | 49 min | 0.00% | C+ |
| BOS to PHX · Phoenixthin sample | 211 | 80.6% | 38 min | 0.00% | B+ |
| BOS to DTW · Detroitthin sample | 203 | 80.7% | 70 min | 0.49% | B+ |
| BOS to SJU · San Juanthin sample | 187 | 72.0% | 74 min | 0.53% | C+ |
| BOS to CVG · Cincinnatithin sample | 175 | 83.3% | 54 min | 0.57% | B+ |
Delay causes
What held BOS up in April
Late-arriving aircraft accounts for 43% of the 161,000 delay minutes carriers reported here, and the remaining four split what is left.
- 43%Late-arriving aircraft
- 29%Carrier
- 27%National Airspace System
- 1%Extreme weather
- 0%Security
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 161,000 reported delay minutes here, that single category outweighs weather by 32 to one. The split is drawn from 161,112 reported delay minutes.
Cancellations are rare at 0.31%, below the national 0.90% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
6.7% of arrivals land an hour or more late, close to the national 6.4%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
What to do with this
Flying from BOS in April
For a April trip through BOS: this is one of the better months to be flying from here, 79.3% on time with 0.31% cancelled. That is a base rate for the month as a whole; a single storm can still spoil a particular day.
Related
Where to go next
- Boston Logan International (BOS), the whole year
- BOS in September75.7%
- BOS in October73.9%
- BOS in November78.0%
- BOS in December68.7%
- BOS in January73.6%
- BOS in February74.8%
- BOS in March74.1%
- BOS in May79.4%
- BOS in June76.6%
- BOS in July70.8%
- BOS in August69.8%
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.