Carrier route record

YXBOS→BNA

Republic Airways · Boston to Nashville

Flights: 500
Period: July 2025 to June 2026
Share of route: 17%
Carriers: 6

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

Republic on BOS to BNA sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 500 flights. The strongest carrier on the route with a full sample, JetBlue Airways, flew 874 at 72.1% on time.

JetBlue Airways is the most reliable of the three carriers covered here at 72.1% on time across 874 flights.

On time

71.5%

Arrivals under 15 minutes late, of 480 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

4.00%

National rate is 1.81%

Whole route

70.4%

Every carrier on BOS to BNA, 2,945 flights

These figures cover 500 flights between July 2025 and June 2026. Beyond the headline rate, 11.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

Republic against every carrier on BOS to BNA

Republic flew 500 of the 2,945 flights on BOS to BNA, about 17% of it. Its 71.5% on time is about level with the route as a whole at 70.4%. Ranked by on-time rate it is number five of six carriers on the route, where the range runs from American at 100.0% to Southwest at 67.0%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The three carriers here are closely matched: 5 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

On-time performance by carrier on BOS to BNA
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlinesthin sample	2	100.0%	—	0.00%	A+
Spirit Airlinesthin sample	40	86.8%	109 min	2.50%	A
JetBlue Airways	874	72.1%	64 min	2.06%	C
Delta Air Lines	533	71.6%	88 min	0.75%	C+
Republic Airways (this page)	500	71.5%	71 min	4.00%	C−
Southwest Airlines	996	67.0%	61 min	1.20%	C

No carrier stands out. JetBlue tops the table at 72.1%, 5 points clear of the bottom, which is inside the range this kind of sample moves year to year.

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 15 points, against 5 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am9 flights—
8am–11am125 flights76.9%
11am–2pm—
2pm–5pm121 flights75.4%
5pm–8pm175 flights62.1%
8pm–5am70 flights74.6%

Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 62.1% on time, against 76.9% for the 8am–11am 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 5pm–8pm window is the busiest, with 175 flights scheduled in it.

Across the year

Republic on BOS to BNA through the year

Jul–Sep 202565 flights54.0%
Oct–Dec 2025112 flights66.1%
Jan–Mar 2026253 flights79.0%
Apr–Jun 202670 flights70.0%

Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 71.5% on time across 500 flights.

Republic on BOS to BNA did not run the same all year. Its best quarter was Jan–Mar 2026 at 79.0% on time and its weakest Jul–Sep 2025 at 54.0%, a swing of 25 points on roughly 125 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Wednesday is the strongest day at 76.9% on time and Friday the weakest at 64.0%. 13 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Republic runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 42% of the 9,771 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
42%
Carrier
30%
National Airspace System
24%
Extreme weather
4%

42% 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 9,771 reported delay minutes here, that single category outweighs weather by 12 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 9,771 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 76.9% on time here.

Cancellations run at 4.00%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 942 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 80.9% on time across 500 flights, 9 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 9 points of difference.

One caution: this is a thin sample. 500 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 BNA

Put together: the delay figures matter less here than the 4.00% cancellation rate. A late arrival costs you a little over an hour; 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. 480 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