Carrier route record
YXBOS→JAX
Republic Airways · Boston to Jacksonville
- Flights
- 894
- 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 BOS to JAX 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 77.3%. The late ones land about an hour behind schedule. That rests on 894 flights, with a median arrival 6 minutes early.
The national on-time rate over the same period is 77.3%, so Republic on BOS to JAX runs 5 points behind the country as a whole. Across a thousand flights that is about 48 extra late arrivals.
Key figures
On time
72.5%
Arrivals under 15 minutes late, of 873 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
2.13%
National rate is 1.89%
Whole route
74.3%
Every carrier on BOS to JAX, 1,625 flights
These figures cover 894 flights between September 2025 and August 2026. Beyond the headline rate, 10.7% 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 BOS to JAX
Republic flew 894 of the 1,625 flights on BOS to JAX, most of the route. Its 72.5% on time is 2 points worse than the route as a whole, which runs 74.3%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from Delta at 82.5% to Republic at 72.5%. 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 | 82.5% | 76 min | 4.55% | B− |
| JetBlue Airways | 665 | 75.9% | 71 min | 3.76% | B− |
| Republic Airways (this page) | 894 | 72.5% | 65 min | 2.13% | 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 17 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am293 flights82.3%
- 11am–2pm—
- 2pm–5pm292 flights69.5%
- 5pm–8pm134 flights65.6%
- 8pm–5am175 flights65.9%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 82.3% of the time, against 65.6% for the evening window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 293 flights scheduled in it.
Across the year
Republic on BOS to JAX through the year
July is the worst month at 61.7% on time, 20 points below June, the best at 81.9%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. December was the busiest month here, with 88 flights.
Across the week, Wednesday is the strongest day at 76.9% on time and Thursday the weakest at 68.5%, a spread of 8 points.
Arrival by arrival
How late Republic on BOS to JAX runs when it is late
Republic on BOS to JAX often beats the schedule: 268 of 873 completed flights, 31%, arrived 15 minutes or more early. The 240 late arrivals split 69 under half an hour, 78 between 30 and 60 minutes, and 93 an hour or more.
- 15+ min early268 flights30.7%
- Within 15 min365 flights41.8%
- 15–29 min late69 flights7.9%
- 30–59 min late78 flights8.9%
- 1–2 hours late61 flights7.0%
- 2+ hours late32 flights3.7%
Scale runs 0% to 100%.
Share of 873 completed flights by arrival against schedule.
36 of 217 late departures made up the time and arrived on time, 17% of them. In the other direction, 59 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at JAX.
The worst days
Worst days for Republic on BOS to JAX
The latest arrival of the period was on 6 September 2025, 5 hours 32 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across September, August, October and March, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 September 2025 | 5 hours 32 minutes | National Airspace System |
| 5 August 2026 | 3 hours 45 minutes | Late-arriving aircraft |
| 12 September 2025 | 3 hours 41 minutes | Carrier |
| 14 October 2025 | 3 hours 36 minutes | Carrier |
| 11 March 2026 | 3 hours 31 minutes | Late-arriving aircraft |
Delay causes
Why Republic runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 16,000 reported delay minutes.
- 39%Late-arriving aircraft
- 33%Carrier
- 26%National Airspace System
- 2%Extreme weather
- 0%Security
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 16,000 reported delay minutes here, that single category outweighs weather by 24 to one. The split is drawn from 15,552 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 82.3% on time here.
Cancellations sit at 2.13% against a national 1.89%, which is ordinary. Diversions add another 0.22%.
Connections and stage length
What a delay here costs
10.7% 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 76.7% on time across 897 flights, 4 points above 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. 894 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 BOS to JAX
Put together: treat all of this as provisional. 894 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 72.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 873 completed flights over 12 months sit behind that.
Related
Where to go next
- BOS to JAX, every carrier
- Republic on JAX to BOS, the return leg
- JetBlue Airways on BOS to JAX75.9%
- Republic Airways network-wide record
- Boston Logan International (BOS) delay statistics
- Jacksonville International (JAX) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
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.