Route profile
BOS→JAX
Flight reliability, delays and best times to fly from Boston to Jacksonville, 1,010 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 24% of comparable major US routes (4,598 compared)
Calculated from 4,380 flights. How this is calculated
BOS → JAX arrives on time 75.7% of the time; the return trip, JAX → BOS, arrives on time 74.4% of the time.
BOS → JAX spends 29.3 minutes on the ground on a 1,010-mile trip: 22.5 minutes from pushback to wheels-up at BOS and 6.8 minutes from touchdown to gate at JAX.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What sets this route apart
Where BOS to JAX differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
BOS to JAX struggles most at 8 AM: 79.0% of its flights scheduled then arrive on time, 7.1 points behind the 86.1% on routes of similar length at the same hour. Against all other routes the gap is 6.9 points.
In January, BOS to JAX runs 7.4 points below routes of similar length, 69.9% on time to 77.3%. Against all other routes the gap is 9.2 points.
June is kinder to BOS to JAX than to routes of similar length: 77.2% on time against 71.7%, 5.5 points better.
Republic Airways’ flights on BOS to JAX arrive on time 73.5% of the time, 8.9 points below the 82.4% it manages on its routes of similar length. Against all other routes the gap is 8.6 points.
JetBlue does better on BOS to JAX than on its routes of similar length: 75.7% on time here, 69.7% there, 6 points apart. Against all other routes the gap is 3.5 points.
BOS to JAX against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 8 AM departures | 79.0% | routes of similar length | 86.1% | −7.1 pts | 889 here, 197,743 there |
| Month: January | 69.9% | routes of similar length | 77.3% | −7.4 pts | 276 here, 226,395 there |
| Month: June | 77.2% | routes of similar length | 71.7% | +5.5 pts | 369 here, 237,422 there |
| Airline: Republic Airways | 73.5% | routes of similar length | 82.4% | −8.9 pts | 1,472 here, 56,002 there |
| Airline: JetBlue | 75.7% | routes of similar length | 69.7% | +6.0 pts | 1,797 here, 146,687 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,010 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
Why BOS → JAX flights are cancelled
July 2023 – July 2026
BOS → JAX cancelled 83 of 4,380 scheduled flights — about 1 in every 53. The reason filed most often was extreme weather, 39.8% of the cancellations coded on this route — about 1 in every 133 scheduled flights.
Share of cancellations
Of 83 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
33 cancellations, 39.8% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
28 cancellations, 33.7% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
22 cancellations, 26.5% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
83 coded cancellations were recorded on BOS → JAX; the section appears from 50.
When it goes wrong
July 2023 – July 2026
60 min late
against a median of 7 min early
BOS → JAX has an average that understates its risk: a typical arrival is 7 min early, but the worst tenth are 67 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 4,380 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at JAX after arriving from BOS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 37% | Likely to miss |
| 45 min | 24% | High risk |
| 60 min | 17% | High risk |
| 90 min | 9.9% | Some risk |
| 120 min | 6.2% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.89% of the time and diverts 0.09% of the time, which a late arrival never shows up in.
Chance of missing is the share of 4,293 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 60 minutes late (90th-percentile gate arrival delay), over 4,380 operations.
Any other layover length: connection checker.
Best time to fly
BOS → JAX flights departing 9 AM–12 PM arrived on time 84.1% of the time, against 64.2% for 6–9 PM departures, a gap of 19.9 percentage points.
By departure window
By departure hour
- 12 AM to 5 AM: too few flights to score
- 6 AM: 90.2% on time from 255 flights
- 7 AM: 85.2% on time from 343 flights
- 8 AM: 79.0% on time from 903 flights
- 9 AM: 86.7% on time from 469 flights
- 10 AM: 77.9% on time from 210 flights
- 11 AM to 2 PM: too few flights to score
- 3 PM: 74.2% on time from 565 flights
- 4 PM: 64.1% on time from 482 flights
- 5 PM: 69.0% on time from 220 flights
- 6 PM: too few flights to score
- 7 PM: 62.8% on time from 431 flights
- 8 PM: 62.8% on time from 219 flights
- 9 PM to 11 PM: too few flights to score
Why BOS → JAX runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for BOS → JAX. Only delays of 15 minutes or more are attributed.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| JetBlue | 1,838 | 75.7% | 2.07% | -6 min | 10.9% |
| Republic Airways | 1,503 | 73.5% | 2.00% | -6 min | 9.9% |
| Delta Air Lines | 1,039 | 78.8% | 1.44% | -11 min | 9.0% |
JetBlue flew 42.0% of the 4,380 flights listed.
Delta Air Lines arrived on time 5.3 percentage points more often than Republic Airways on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| B6109 JetBlue | 7:00 AM | 978 | 83.5% |
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Thursday the least, a gap of 9.1 percentage points.
By month
- Jan: 69.9%
- Feb: 76.3%
- Mar: 80.1%
- Apr: 79.8%
- May: 75.3%
- Jun: 77.2%
- Jul: 64.7%
- Aug: 74.3%
- Sep: 78.0%
- Oct: 78.2%
- Nov: 81.9%
- Dec: 74.9%
July is historically the weakest month and November the strongest, a spread of 17.2 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: too few flights to score (113)
- August 2023: too few flights to score (115)
- September 2023: too few flights to score (102)
- October 2023: too few flights to score (105)
- November 2023: too few flights to score (111)
- December 2023: too few flights to score (102)
- January 2024: too few flights to score (90)
- February 2024: too few flights to score (81)
- March 2024: too few flights to score (88)
- April 2024: too few flights to score (86)
- May 2024: too few flights to score (119)
- June 2024: too few flights to score (98)
- July 2024: too few flights to score (87)
- August 2024: too few flights to score (88)
- September 2024: too few flights to score (116)
- October 2024: too few flights to score (114)
- November 2024: too few flights to score (113)
- December 2024: 74.1% from 137 flights
- January 2025: too few flights to score (102)
- February 2025: too few flights to score (100)
- March 2025: 81.3% from 144 flights
- April 2025: 79.1% from 139 flights
- May 2025: 65.9% from 141 flights
- June 2025: 70.5% from 133 flights
- July 2025: 67.9% from 146 flights
- August 2025: 80.9% from 134 flights
- September 2025: 77.0% from 125 flights
- October 2025: 72.1% from 144 flights
- November 2025: 75.0% from 124 flights
- December 2025: 67.4% from 143 flights
- January 2026: too few flights to score (96)
- February 2026: too few flights to score (101)
- March 2026: 74.3% from 144 flights
- April 2026: 80.4% from 148 flights
- May 2026: 82.5% from 160 flights
- June 2026: 82.1% from 141 flights
- July 2026: 66.7% from 150 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 75.1% against 75.9% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 4,380 BOS → JAX flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed