Carrier route record
YXJAX→BOS
Republic Airways · Jacksonville to Boston
- Flights
- 897
- Period
- September 2025 to August 2026
- Share of route
- 55%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on JAX to BOS lands a B, level with the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 897 flights, with a median arrival 8 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Republic on JAX to BOS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.7%
Arrivals under 15 minutes late, of 884 completed flights
Avg delay
84 min
Across delayed arrivals only, not all flights
Cancelled
1.34%
National rate is 1.89%
Whole route
73.4%
Every carrier on JAX to BOS, 1,628 flights
These figures cover 897 flights between September 2025 and August 2026. Beyond the headline rate, 9.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Republic against every carrier on JAX to BOS
Republic flew 897 of the 1,628 flights on JAX to BOS, most of the route. Its 76.7% on time is 3 points better than the route as a whole, which runs 73.4%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 81.0% to JetBlue at 68.2%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Linesthin sample | 66 | 81.0% | 151 min | 4.55% | B− |
| Republic Airways (this page) | 897 | 76.7% | 84 min | 1.34% | B |
| JetBlue Airways | 665 | 68.2% | 78 min | 3.61% | C− |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Republic runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 21 points, against half a point between the best and worst carrier.
- 5am–8am357 flights88.6%
- 8am–11am12 flights—
- 11am–2pm285 flights69.1%
- 2pm–5pm7 flights—
- 5pm–8pm220 flights67.4%
- 8pm–5am16 flights—
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 88.6% of the time, against 67.4% for the evening window. That is 21 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 357 flights scheduled in it.
Across the year
Republic on JAX to BOS through the year
May is the best month on the calendar at 87.1% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. December was the busiest month here, with 88 flights.
Across the week, Saturday is the strongest day at 87.4% on time and Monday the weakest at 70.5%, a spread of 17 points.
Arrival by arrival
How late Republic on JAX to BOS runs when it is late
Republic on JAX to BOS often beats the schedule: 290 of 884 completed flights, 33%, arrived 15 minutes or more early. The 206 late arrivals split 61 under half an hour, 62 between 30 and 60 minutes, and 83 an hour or more.
- 15+ min early290 flights32.8%
- Within 15 min388 flights43.9%
- 15–29 min late61 flights6.9%
- 30–59 min late62 flights7.0%
- 1–2 hours late46 flights5.2%
- 2+ hours late37 flights4.2%
Scale runs 0% to 100%.
Share of 884 completed flights by arrival against schedule.
25 of 190 late departures made up the time and arrived on time, 13% of them. 41 flights left on time and still arrived late.
The worst days
Worst days for Republic on JAX to BOS
The latest arrival of the period was on 19 June 2026, 17 hours 25 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 June 2026 | 17 hours 25 minutes | Carrier |
| 30 December 2025 | 8 hours 13 minutes | Carrier |
| 25 September 2025 | 8 hours 4 minutes | Carrier |
| 28 January 2026 | 7 hours 45 minutes | Carrier |
| 13 November 2025 | 6 hours 56 minutes | Carrier |
Delay causes
Why Republic runs late on this route
Carrier accounts for 47% of the 17,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 33%National Airspace System
- 19%Late-arriving aircraft
- 1%Extreme weather
The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 8,120 of the 17,000 delay minutes reported here. The split is drawn from 17,387 reported delay minutes.
33% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 5,731 minutes out of 17,000, against a national NAS share of 21%.
Cancellations sit at 1.34% against a national 1.89%, which is ordinary. Diversions add another 0.11%.
Connections and stage length
What a delay here costs
9.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 1,011 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 72.5% on time across 894 flights, 4 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
One caution: this is a thin sample. 897 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Republic on JAX to BOS
Put together: treat all of this as provisional. 897 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 76.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 884 completed flights over 12 months sit behind that.
Related
Where to go next
- JAX to BOS, every carrier
- Republic on BOS to JAX, the return leg
- JetBlue Airways on JAX to BOS68.2%
- Republic Airways network-wide record
- Jacksonville International (JAX) delay statistics
- Boston Logan International (BOS) delay statistics
- How often a connection fails at the major US hubs
- The best time of day to fly, according to 7.05 million flight records
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.