Carrier route record
YXSAV→BOS
Republic Airways · Savannah to Boston
- Flights
- 416
- Period
- July 2025 to June 2026
- Share of route
- 39%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.
Republic on SAV to BOS sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 10 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 416 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.6%, so Republic on SAV to BOS runs 10 points behind the country as a whole. Across a thousand flights that is about 96 extra late arrivals.
Key figures
On time
68.0%
Arrivals under 15 minutes late, of 403 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
2.88%
National rate is 1.81%
Whole route
68.4%
Every carrier on SAV to BOS, 1,076 flights
These figures cover 416 flights between July 2025 and June 2026. Beyond the headline rate, 14.9% 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 SAV to BOS
Republic flew 416 of the 1,076 flights on SAV to BOS, about 39% of it. Its 68.0% on time is about level with the route as a whole at 68.4%. Ranked by on-time rate it is number three of four carriers on the route, where the range runs from Allegiant at 88.9% to Delta at 46.2%. 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Allegiant Airthin sample | 18 | 88.9% | 26 min | 0.00% | A+ |
| JetBlue Airways | 616 | 69.1% | 86 min | 2.92% | C |
| Republic Airways (this page) | 416 | 68.0% | 77 min | 2.88% | C |
| Delta Air Linesthin sample | 26 | 46.2% | 113 min | 0.00% | F+ |
Flight by flight
Republic flight numbers on SAV to BOS
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 416 flights.
- 5am–8am—
- 8am–11am9 flights—
- 11am–2pm68 flights74.6%
- 2pm–5pm315 flights65.0%
- 5pm–8pm24 flights—
- 8pm–5am—
Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 74.6% on time, ahead of 2pm–5pm at 65.0%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 2pm–5pm window is the busiest, with 315 flights scheduled in it.
Across the year
Republic on SAV to BOS through the year
Delays peak in September, when the on-time rate falls to 41.9%. August is the strongest month at 84.4%. Moving a flexible trip across that boundary buys 43 points. May was the busiest month here, with 40 flights.
Across the week, Saturday is the strongest day at 81.1% on time and Sunday the weakest at 61.0%. 20 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 9,901 reported delay minutes.
- 40%National Airspace System
- 38%Carrier
- 13%Late-arriving aircraft
- 8%Extreme weather
The largest share of delay minutes, 38%, 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 3,753 of the 9,901 delay minutes reported here. The split is drawn from 9,901 reported delay minutes.
40% 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 4,005 minutes out of 9,901, against a national NAS share of 21%.
Cancellations run at 2.88%, 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 14.9% 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 901 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 80.5% on time across 416 flights, 13 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 13 points of difference.
One caution: this is a thin sample. 416 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 SAV to BOS
Put together: the delay figures matter less here than the 2.88% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 11am–2pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 403 completed flights over 12 months sit behind that.
Related
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.