Carrier route record

YXCHS→BOS

Republic Airways · Charleston to Boston

Flights: 110
Period: September 2025 to August 2026
Share of route: 10%
Carriers: 3

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

Republic on CHS to BOS earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 110 flights. The strongest carrier on the route with a full sample, JetBlue Airways, flew 670 at 69.4% on time.

Set against the rest of the country, Republic's CHS to BOS record is 7 points better than the US average of 77.3%. That gap is worth roughly 68 fewer late arrivals for every thousand flights.

On time

84.1%

Arrivals under 15 minutes late, of 107 completed flights

Avg delay

88 min

Across delayed arrivals only, not all flights

Cancelled

2.73%

National rate is 1.89%

Whole route

69.5%

Every carrier on CHS to BOS, 1,150 flights

These figures cover 110 flights between September 2025 and August 2026. Beyond the headline rate, 8.4% 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 CHS to BOS

Republic flew 110 of the 1,150 flights on CHS to BOS, about 10% of it. Its 84.1% on time is 15 points better than the route as a whole, which runs 69.5%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Republic at 84.1% to Delta at 65.4%.

The two carriers here are closely matched: 4 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 CHS to BOS
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airways (this page)thin sample	110	84.1%	88 min	2.73%	B
JetBlue Airways	670	69.4%	81 min	2.84%	C
Delta Air Lines	370	65.4%	112 min	3.78%	C−

Delta Air Lines cancels 3.8% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

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 is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 110 flights.

There are not enough flights in each departure window to split Republic's CHS to BOS record by time of day without the percentages moving on noise. The headline rate of 84.1% is the reliable figure here.

Across the year

Republic on CHS to BOS through the year

Oct–Dec 202543 flights76.7%
Jan–Mar 202628 flights—
Apr–Jun 202619 flights—
Jul–Sep 202620 flights—

Scale runs 70% to 80%. 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 84.1% on time across 110 flights.

Split by quarter, Republic on CHS to BOS logged 43 flights in Oct–Dec 2025, 28 flights in Jan–Mar 2026, 19 flights in Apr–Jun 2026 and 20 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 84.1% annual figure is the one to use.

Across the week, Sunday is the strongest day at 87.5% on time and Saturday the weakest at 78.1%, a spread of 9 points.

Arrival by arrival

How late Republic on CHS to BOS runs when it is late

Republic on CHS to BOS often beats the schedule: 33 of 107 completed flights, 31%, arrived 15 minutes or more early. When Republic on CHS to BOS is late it tends to be very late: 9 of its 17 late arrivals were an hour or more behind, and 5 were two hours or more.

15+ min early33 flights30.8%
Within 15 min57 flights53.3%
15–29 min late3 flights2.8%
30–59 min late5 flights4.7%
1–2 hours late4 flights3.7%
2+ hours late5 flights4.7%

Scale runs 0% to 100%.

Share of 107 completed flights by arrival against schedule.

Only 14 of 107 completed flights left 15 minutes late or more, too few to say how often the time is made up.

The worst days

Worst days for Republic on CHS to BOS

The latest arrival of the period was on 20 December 2025, 5 hours behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across December, January, July and February, with no single month standing out.

The latest arrivals of Republic on CHS to BOS in the period
Date	Arrived late by	Largest filed cause
20 December 2025	5 hours	Carrier
1 January 2026	2 hours 48 minutes	Extreme weather
11 July 2026	2 hours 34 minutes	National Airspace System
29 December 2025	2 hours 25 minutes	National Airspace System
14 February 2026	2 hours 9 minutes	Carrier

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 1,490 reported delay minutes.

Carrier
35%
National Airspace System
33%
Late-arriving aircraft
18%
Extreme weather
14%

Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.3 times the usual weather exposure. The split is drawn from 1,490 reported delay minutes.

The largest share of delay minutes, 35%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 523 of the 1,490 delay minutes reported here.

Cancellations run at 2.73%, against 1.89% nationally. That is roughly one flight in 40 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

8.4% 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 an hour and a half, which a normal layover absorbs.

The 818 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 runs 85.0% on time across 109 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 110 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 CHS to BOS

Put together: treat all of this as provisional. 110 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 84.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 107 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures