Carrier route record
YXCVG→BOS
Republic Airways · Cincinnati to Boston
- 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 CVG to BOS carries a cancellation problem, not just a delay problem: 3.7% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 1,673 flights, with a median arrival 11 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Republic on CVG 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
77.0%
Arrivals under 15 minutes late, of 1,611 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
3.71%
National rate is 1.89%
Whole route
79.5%
Every carrier on CVG to BOS, 2,059 flights
These figures cover 1,673 flights between September 2025 and August 2026. Beyond the headline rate, 10.6% 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 CVG to BOS
Republic flew 1,673 of the 2,059 flights on CVG to BOS, most of the route. Its 77.0% on time is 3 points worse than the route as a whole, which runs 79.5%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Envoy at 92.1% to Delta at 47.1%. 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 |
|---|---|---|---|---|---|
| Envoy Air | 369 | 92.1% | 68 min | 0.81% | A+ |
| Republic Airways (this page) | 1,673 | 77.0% | 68 min | 3.71% | B− |
| Delta Air Linesthin sample | 17 | 47.1% | 63 min | 0.00% | F+ |
Flight by flight
Republic flight numbers on CVG to BOS
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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 26 points, against half a point between the best and worst carrier.
- 5am–8am338 flights91.2%
- 8am–11am24 flights—
- 11am–2pm360 flights82.0%
- 2pm–5pm408 flights67.0%
- 5pm–8pm304 flights64.8%
- 8pm–5am239 flights80.2%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 64.8% on time, against 91.2% 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 2pm–5pm window is the busiest, with 408 flights scheduled in it.
Across the year
Republic on CVG to BOS through the year
Delays peak in October, when the on-time rate falls to 55.1%. January is the strongest month at 87.5%. Moving a flexible trip across that boundary buys 32 points. August was the busiest month here, with 164 flights.
Across the week, Saturday is the strongest day at 87.9% on time and Thursday the weakest at 72.1%, a spread of 16 points.
Arrival by arrival
How late Republic on CVG to BOS runs when it is late
Republic on CVG to BOS often beats the schedule: 689 of 1,611 completed flights, 43%, arrived 15 minutes or more early. The 370 late arrivals split 84 under half an hour, 116 between 30 and 60 minutes, and 170 an hour or more.
- 15+ min early689 flights42.8%
- Within 15 min552 flights34.3%
- 15–29 min late84 flights5.2%
- 30–59 min late116 flights7.2%
- 1–2 hours late128 flights7.9%
- 2+ hours late42 flights2.6%
Scale runs 0% to 100%.
Share of 1,611 completed flights by arrival against schedule.
64 of 376 late departures made up the time and arrived on time, 17% of them. 58 flights left on time and still arrived late.
The worst days
Worst days for Republic on CVG to BOS
The latest arrival of the period was on 30 July 2026, 8 hours 52 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 national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 July 2026 | 8 hours 52 minutes | Carrier |
| 1 July 2026 | 5 hours 28 minutes | National Airspace System |
| 7 August 2026 | 4 hours 45 minutes | Late-arriving aircraft |
| 10 November 2025 | 4 hours 32 minutes | National Airspace System |
| 13 October 2025 | 4 hours 11 minutes | National Airspace System |
Delay causes
Why Republic runs late on this route
National Airspace System accounts for 57% of the 25,000 delay minutes carriers reported here, and the remaining four split what is left.
- 57%National Airspace System
- 23%Late-arriving aircraft
- 18%Carrier
- 2%Extreme weather
- 0%Security
57% 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 14,000 minutes out of 25,000, against a national NAS share of 21%. The split is drawn from 25,005 reported delay minutes.
Cancellations run at 3.71%, against 1.89% nationally. That is about one flight in 25 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
10.6% 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 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 80.7% on time across 1,673 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.
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 CVG to BOS
Put together: the delay figures matter less here than the 3.71% 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. 1,611 completed flights over 12 months sit behind that.
Related
Where to go next
- CVG to BOS, every carrier
- Republic on BOS to CVG, the return leg
- Envoy Air on CVG to BOS92.1%
- Republic Airways network-wide record
- Cincinnati/Northern Kentucky International (CVG) delay statistics
- Boston Logan International (BOS) delay statistics
- The US routes with the most cancellations
- 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.