Carrier route record

YXBOS→CVG

Republic Airways · Boston to Cincinnati

Flights: 1,557
Period: July 2025 to June 2026
Share of route: 80%
Carriers: 3

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.

Republic on BOS to CVG lands a B−, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That is a workable record, not a spotless one. That rests on 1,557 flights, with a median arrival 10 minutes early.

Set against the rest of the country, Republic's BOS to CVG record is 5 points better than the US average of 77.6%. That gap is worth roughly 47 fewer late arrivals for every thousand flights.

On time

82.3%

Arrivals under 15 minutes late, of 1,507 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

3.08%

National rate is 1.81%

Whole route

80.5%

Every carrier on BOS to CVG, 1,943 flights

These figures cover 1,557 flights between July 2025 and June 2026. The median arrival is 10 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.

Carrier by carrier

Republic against every carrier on BOS to CVG

Republic flew 1,557 of the 1,943 flights on BOS to CVG, most of the route. Its 82.3% on time is 2 points better than the route as a whole, which runs 80.5%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Delta at 95.5% to Envoy at 71.8%. Two 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.

On-time performance by carrier on BOS to CVG
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Linesthin sample	22	95.5%	35 min	0.00%	A+
Republic Airways (this page)	1,557	82.3%	54 min	3.08%	B−
Envoy Airthin sample	364	71.8%	77 min	2.20%	C

Flight by flight

Republic flight numbers on BOS to CVG

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 22 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am100 flights87.4%
8am–11am387 flights87.5%
11am–2pm338 flights87.0%
2pm–5pm328 flights81.7%
5pm–8pm257 flights76.8%
8pm–5am147 flights65.2%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 87.5% of the time, against 65.2% for the overnight window. That is 22 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 387 flights scheduled in it.

Across the year

Republic on BOS to CVG through the year

Darker means more delays. Figures are on-time percentages.August best, December worst

December is the weak month at 75.0% on time, against 92.9% in August. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. October was the busiest month here, with 160 flights.

Across the week, Tuesday is the strongest day at 87.7% on time and Sunday the weakest at 75.6%. 12 points is a smaller lever than departure hour, but it is free.

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 14,000 reported delay minutes.

Late-arriving aircraft
38%
Carrier
36%
National Airspace System
25%
Extreme weather
2%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 14,000 reported delay minutes here, that single category outweighs weather by 22 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 14,428 reported delay minutes.

The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 5,164 of the 14,000 delay minutes reported here.

Cancellations run at 3.08%, against 1.81% nationally. That is roughly 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

5.8% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 55 minutes, 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg is a different operation and performs like one: it runs 77.4% on time across 1,557 flights, 5 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 5 points of difference.

The sample behind these figures is 1,557 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 3.08% cancellation rate. A late arrival costs you about 55 minutes; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 1,507 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures