Carrier performance at one airport
B6→BOS
JetBlue Airways at Boston Logan International
- Departures
- 37,535
- Period
- June 2025 to May 2026
- Routes
- 25
- Rank here
- #7 of 11
JetBlue Airways at Boston sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.4%. The late ones land a little over an hour behind schedule. That rests on 37,535 flights, of which Allegiant Air flew 663 at 85.9% on time.
Measured against the airport rather than the country, JetBlue Airways runs 3 points behind the 75.4% weighted average across all carriers at BOS. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
72.1%
36,505 completed departures
Avg delay
69 min
Across delayed flights only
Cancelled
2.40%
At BOS, this carrier only
Rank here
#7
Of 11 carriers clearing the floor at BOS
These figures cover 38,000 flights between June 2025 and May 2026. Beyond the headline rate, 11.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Against the competition
Every carrier at BOS, ranked
The choice of carrier is not cosmetic here. Allegiant Air arrives on time 85.9% of the time; Spirit Airlines manages 66.0%. Sample sizes sit next to every figure, because a two-point gap across 2,654 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Allegiant Air | 663 | 85.9% | 85 min | 0.45% | A+ |
| Envoy Air | 1,992 | 79.2% | 75 min | 2.06% | B |
| United Airlines | 12,811 | 78.6% | 76 min | 1.85% | B |
| American Airlines | 16,729 | 77.7% | 92 min | 2.58% | B |
| Republic Airways | 33,245 | 77.5% | 67 min | 3.94% | B− |
| Delta Air Lines | 26,395 | 76.5% | 73 min | 1.97% | B |
| JetBlue Airways (this page) | 37,535 | 72.1% | 69 min | 2.40% | C |
| Southwest Airlines | 7,153 | 71.7% | 62 min | 1.54% | C |
| Frontier Airlines | 935 | 70.6% | 62 min | 1.71% | C |
| Alaska Airlines | 2,546 | 70.2% | 54 min | 1.10% | C |
| Spirit Airlines | 2,654 | 66.0% | 78 min | 4.37% | C− |
Spirit Airlines cancels 4.4% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Where JetBlue Airways flies from BOS
JetBlue Airways operates 25 routes out of BOS with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| BOS to DCA · Washington | 2,645 | 69.2% | 71 min | 3.48% | C− |
| BOS to MCO · Orlando | 2,491 | 68.2% | 73 min | 2.85% | C |
| BOS to JFK · New York | 2,472 | 73.6% | 81 min | 3.96% | C− |
| BOS to FLL · Fort Lauderdale | 1,960 | 65.8% | 68 min | 3.11% | C− |
| BOS to LAX · Los Angeles | 1,622 | 76.8% | 71 min | 1.42% | B |
| BOS to SFO · San Francisco | 1,619 | 73.6% | 65 min | 1.24% | C |
| BOS to RSW · Fort Myers | 1,608 | 68.7% | 68 min | 2.61% | C |
| BOS to PBI · West Palm Beach | 1,576 | 64.2% | 71 min | 3.30% | D− |
| BOS to TPA · Tampa | 1,567 | 74.0% | 69 min | 2.81% | C |
| BOS to SJU · San Juan | 1,260 | 70.3% | 71 min | 2.38% | C |
| BOS to RDU · Raleigh | 1,085 | 73.3% | 66 min | 2.21% | C |
| BOS to LAS · Las Vegas | 1,052 | 75.2% | 69 min | 1.05% | B |
| BOS to PIT · Pittsburgh | 1,007 | 76.2% | 71 min | 2.18% | B |
| BOS to BUF · Buffalo | 966 | 73.2% | 72 min | 2.17% | C |
| BOS to SAN · San Diego | 915 | 86.7% | 66 min | 1.09% | A |
| BOS to PHL · Philadelphia | 893 | 71.4% | 69 min | 2.24% | C |
| BOS to BNA · Nashville | 874 | 72.7% | 66 min | 2.06% | C |
| BOS to ATL · Atlanta | 849 | 68.9% | 65 min | 2.36% | C |
| BOS to RIC · Richmond | 755 | 69.1% | 65 min | 2.65% | C |
| BOS to CLE · Cleveland | 740 | 73.7% | 72 min | 2.16% | C |
| BOS to DTW · Detroit | 726 | 72.4% | 67 min | 2.48% | C |
| BOS to DEN · Denver | 674 | 71.9% | 60 min | 1.63% | C |
| BOS to JAX · Jacksonville | 652 | 75.3% | 70 min | 2.76% | B |
| BOS to CHS · Charleston | 642 | 74.0% | 68 min | 1.71% | C |
| BOS to SAV · Savannah | 635 | 77.7% | 63 min | 2.05% | B |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against 20 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am6,895 flights85.9%
- 8am–11am8,344 flights81.5%
- 11am–2pm5,069 flights73.6%
- 2pm–5pm6,852 flights65.0%
- 5pm–8pm6,246 flights59.3%
- 8pm–5am4,129 flights59.3%
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 59.3% on time, against 85.9% 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.
Across the year
Seasonal pattern
December is the weak month at 60.0% on time, against 81.4% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days.
Delay causes
What holds this operation up
- 42%Late-arriving aircraft
- 28%National Airspace System
- 27%Carrier
- 3%Extreme weather
- 0%Security
42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 705,000 reported delay minutes here, that single category outweighs weather by 14 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.
Cancellations sit at 2.40% against a national 1.80%, which is ordinary. Diversions add another 0.35%.
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.3% of arrivals land a full hour or more behind schedule, against 8.2% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
37,535 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 81.4% on time and December 60.0%, a swing of 21 points. If the dates move at all, move them out of December before you think about anything else.
Common questions
JetBlue Airways at BOS
How often is JetBlue Airways at BOS delayed?
Roughly one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 27.9% of the 37,535 flights in this analysis, against 22.6% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on JetBlue Airways at BOS?
Allegiant Air leads at 85.9% on time across 663 flights. Spirit Airlines is at the other end on 66.0%, a gap of 20 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on JetBlue Airways at BOS?
The 5am–8am departure window is the strongest at 85.9% on time. The 8pm–5am window is the weakest at 59.3%, 27 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on JetBlue Airways at BOS?
December is the weakest month at 60.0% on time, compared with 81.4% in September. Across the year that is 21 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.