Carrier route record
YXBOS→CVG
Republic Airways · Boston to Cincinnati
- Flights
- 1,673
- Period
- September 2025 to August 2026
- Share of route
- 81%
- 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 CVG lands a B−, 3 points better than the national rate of 77.3%. 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 1,673 flights, with a median arrival 9 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Republic on BOS to CVG from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
80.7%
Arrivals under 15 minutes late, of 1,617 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
3.17%
National rate is 1.89%
Whole route
78.9%
Every carrier on BOS to CVG, 2,060 flights
These figures cover 1,673 flights between September 2025 and August 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Republic against every carrier on BOS to CVG
Republic flew 1,673 of the 2,060 flights on BOS to CVG, most of the route. Its 80.7% on time is 2 points better than the route as a whole, which runs 78.9%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 94.4% to Envoy at 69.8%. 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 | 18 | 94.4% | 61 min | 0.00% | A+ |
| Republic Airways (this page) | 1,673 | 80.7% | 56 min | 3.17% | B− |
| Envoy Air | 369 | 69.8% | 90 min | 1.90% | C |
Flight by flight
Republic flight numbers on BOS to CVG
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 25 points, against half a point between the best and worst carrier.
- 5am–8am100 flights87.4%
- 8am–11am401 flights86.6%
- 11am–2pm392 flights84.9%
- 2pm–5pm329 flights80.8%
- 5pm–8pm301 flights73.6%
- 8pm–5am150 flights62.6%
Scale runs 55% to 95%.
The 8pm–5am window is where this operation falls apart: 62.6% on time, against 87.4% 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 401 flights scheduled in it.
Across the year
Republic on BOS to CVG through the year
August is the worst month at 71.7% on time, 15 points below November, the best at 86.5%. 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. August was the busiest month here, with 164 flights.
Across the week, Wednesday is the strongest day at 86.3% on time and Sunday the weakest at 74.5%, a spread of 12 points.
Arrival by arrival
How late Republic on BOS to CVG runs when it is late
Republic on BOS to CVG often beats the schedule: 590 of 1,617 completed flights, 36%, arrived 15 minutes or more early. The 312 late arrivals split 107 under half an hour, 104 between 30 and 60 minutes, and 101 an hour or more.
- 15+ min early590 flights36.5%
- Within 15 min715 flights44.2%
- 15–29 min late107 flights6.6%
- 30–59 min late104 flights6.4%
- 1–2 hours late70 flights4.3%
- 2+ hours late31 flights1.9%
Scale runs 0% to 100%.
Share of 1,617 completed flights by arrival against schedule.
62 of 297 late departures made up the time and arrived on time, 21% of them. 77 flights left on time and still arrived late.
The worst days
Worst days for Republic on BOS to CVG
The latest arrival of the period was on 7 August 2026, 5 hours 11 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 August 2026 | 5 hours 11 minutes | Carrier |
| 12 June 2026 | 4 hours 12 minutes | Late-arriving aircraft |
| 26 January 2026 | 4 hours 8 minutes | Late-arriving aircraft |
| 27 April 2026 | 4 hours 6 minutes | National Airspace System |
| 26 January 2026 | 3 hours 1 minute | 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 17,000 reported delay minutes.
- 37%Carrier
- 36%Late-arriving aircraft
- 25%National Airspace System
- 2%Extreme weather
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 17,000 reported delay minutes here, that single category outweighs weather by 22 to one. The split is drawn from 17,336 reported delay minutes.
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,442 of the 17,000 delay minutes reported here.
Cancellations run at 3.17%, against 1.89% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
6.2% of arrivals land an hour or more late, close to the national 8.3%, 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.
The 752 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 77.0% on time across 1,673 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.
The sample behind these figures is 1,673 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Republic on BOS to CVG
Put together: the delay figures matter less here than the 3.17% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 1,617 completed flights over 12 months sit behind that.
Related
Where to go next
- BOS to CVG, every carrier
- Republic on CVG to BOS, the return leg
- Envoy Air on BOS to CVG69.8%
- Republic Airways network-wide record
- Boston Logan International (BOS) delay statistics
- Cincinnati/Northern Kentucky International (CVG) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.