Route reliability record
BOS→SAV
Boston to Savannah
- Flights
- 1,023
- Period
- September 2025 to August 2026
- Distance
- 901 mi
- Carriers
- 3
This route lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 1,023 BOS to SAV flights, of which Republic Airways flew 426 at 81.0% on time.
Best time to fly BOS to SAV: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 88.4% of the time and Wednesday flights 90.1%, against 79.4% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
79.4%
Arrivals under 15 minutes late, of 994 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
2.64%
National rate is 1.89%
Best carrier
Republic
81.0% on time across 426 flights
These figures cover 1,023 flights between September 2025 and August 2026. The median arrival is 8 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.
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Carrier by carrier
Which airline is most reliable on BOS to SAV
The two carriers here are closely matched: 3 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Linesthin sample | 16 | 87.5% | 41 min | 0.00% | A+ |
| Republic Airways | 426 | 81.0% | 47 min | 2.35% | B |
| JetBlue Airways | 581 | 77.9% | 66 min | 2.93% | B |
No carrier stands out. Republic tops the table at 81.0%, 3 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Flights on BOS to SAV
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Boston to Savannah
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. BOS → SAVBoston to Savannah | Republic Airways | 79.1% | 81.0% | 2.35% | 8am–11am, Wed | — |
| 2. BOS → SAVBoston to Savannah | JetBlue Airways | 75.6% | 77.9% | 2.93% | 5am–8am, Wed | B6 249 07:25 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 34 points, against 3 points between the best and worst carrier.
- 5am–8am180 flights88.4%
- 8am–11am259 flights79.4%
- 11am–2pm375 flights80.0%
- 2pm–5pm133 flights76.3%
- 5pm–8pm58 flights54.5%
- 8pm–5am18 flights—
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 54.5% on time, against 88.4% 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 11am–2pm window is the busiest, with 375 flights scheduled in it.
Explore
Filter BOS to SAV by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On BOS to SAV, the best departure window is 5am–8am at 88.4% on time and the worst is 5pm–8pm at 54.5%, a wide gap of 33.9 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am88.4%
- 8–11am79.4%
- 11am–2pm80.0%
- 2–5pm76.3%
- 5–8pm54.5%
- 8pm–5am—
best all US flightsScale 45% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 29 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
December is the weak month at 58.9% on time, against 87.8% in September. 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. April was the busiest month here, with 109 flights.
Across the week, Wednesday is the strongest day at 90.1% on time and Sunday the weakest at 70.8%, a spread of 19 points.
Delay causes
Why this route gets delayed
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 12,000 reported delay minutes.
- 40%Carrier
- 29%National Airspace System
- 27%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,769 of the 12,000 delay minutes reported here. The split is drawn from 11,905 reported delay minutes.
Cancellations run at 2.64%, against 1.89% nationally. That is about 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 actually costs
6.4% 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 about an hour, which a normal layover absorbs.
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.
The return leg is a different operation and performs like one: it runs 68.5% on time across 1,023 flights, 11 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 11 points of difference.
One caution: this is a thin sample. 1,023 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.
Work out the risk of missing a connection in SAV after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 1,023 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 79.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 994 completed flights over 12 months sit behind that.
Common questions
BOS to SAV questions
How often is BOS to SAV delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 20.6% of the 1,023 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on BOS to SAV?
Republic Airways leads at 81.0% on time across 426 flights. JetBlue Airways is at the other end on 77.9%, a gap of 3 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on BOS to SAV?
The 5am–8am departure window is the strongest at 88.4% on time. The 5pm–8pm window is the weakest at 54.5%, 34 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on BOS to SAV?
December is the weakest month at 58.9% on time, compared with 87.8% in September. Across the year that is 29 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- SAV to BOS — the return legseparate record
- Boston Logan International (BOS) delay statistics
- Republic Airways on BOS to SAV81.0%
- JetBlue Airways on BOS to SAV77.9%
- BOS to DCA, a related route72.6%
- ATL to SAV, a related route82.1%
- BOS to ORD, a related route71.9%
- Delta Air Lines on-time record87.5%
- Republic Airways on-time record81.0%
- JetBlue Airways on-time record77.9%
- The US routes with the most cancellations
- What a cancellation rate actually tells you (and what it hides)
Direction matters. BOS to SAV and SAV to BOS are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.