Route reliability record
SAV→BOS
Savannah to Boston
- Flights
- 1,076
- Period
- July 2025 to June 2026
- Distance
- 901 mi
- Carriers
- 4
This route sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 1,076 SAV to BOS flights, of which JetBlue Airways flew 616 at 69.1% on time.
Best time to fly SAV to BOS: a 8am–11am departure, ideally on a Saturday. Flights in that window arrived on time 86.7% of the time and Saturday flights 79.7%, against 68.4% for the route overall.
The national on-time rate over the same period is 77.6%, so this route runs 9 points behind the country as a whole. Across a thousand flights that is about 92 extra late arrivals.
Key figures
On time
68.4%
Arrivals under 15 minutes late, of 1,045 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
2.79%
National rate is 1.81%
Best carrier
JetBlue
69.1% on time across 616 flights
These figures cover 1,076 flights between July 2025 and June 2026. Beyond the headline rate, 14.1% 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
Which airline is most reliable on SAV to BOS
The two carriers here are closely matched: about a point 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 |
|---|---|---|---|---|---|
| Allegiant Airthin sample | 18 | 88.9% | 26 min | 0.00% | A+ |
| JetBlue Airways | 616 | 69.1% | 86 min | 2.92% | C |
| Republic Airways | 416 | 68.0% | 77 min | 2.88% | C |
| Delta Air Linesthin sample | 26 | 46.2% | 113 min | 0.00% | F+ |
No carrier stands out. JetBlue tops the table at 69.1%, about a point clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Flights on SAV to BOS
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.
Best ways to make this trip
The most reliable ways to fly Savannah to Boston
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. SAV → BOSSavannah to Boston | JetBlue Airways | 67.1% | 69.1% | 2.92% | 8am–11am, Sat | B6 450 16:10 |
| 2. SAV → BOSSavannah to Boston | Republic Airways | 66.0% | 68.0% | 2.88% | 11am–2pm, Sat | YX 5647 15:37 |
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 28 points, against about a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am26 flights—
- 8am–11am91 flights86.7%
- 11am–2pm338 flights70.1%
- 2pm–5pm404 flights59.2%
- 5pm–8pm129 flights70.2%
- 8pm–5am88 flights72.4%
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 86.7% of the time, against 59.2% for the afternoon window. That is 28 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 404 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 37 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.
Delays peak in September, when the on-time rate falls to 45.6%. January is the strongest month at 82.4%. Moving a flexible trip across that boundary buys 37 points. July was the busiest month here, with 112 flights.
Across the week, Saturday is the strongest day at 79.7% on time and Sunday the weakest at 62.4%. 17 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. National Airspace System accounts for 43% of the 27,000 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.
- 43%National Airspace System
- 27%Late-arriving aircraft
- 26%Carrier
- 4%Extreme weather
43% 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 12,000 minutes out of 27,000, against a national NAS share of 21%. The split is drawn from 27,406 reported delay minutes.
Cancellations run at 2.79%, against 1.81% 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 actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 14.1% 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 80.0% on time across 1,076 flights, 12 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 12 points of difference.
One caution: this is a thin sample. 1,076 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 BOS after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 1,076 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 68.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,045 completed flights over 12 months sit behind that.
Common questions
SAV to BOS questions
How often is SAV to BOS delayed?
About one flight in three arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 31.6% of the 1,076 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
Which airline is most reliable on SAV to BOS?
JetBlue Airways leads at 69.1% on time across 616 flights. Republic Airways is at the other end on 68.0%, a gap of about a point. 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 SAV to BOS?
The 8am–11am departure window is the strongest at 86.7% on time. The 2pm–5pm window is the weakest at 59.2%, 28 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 September delays on SAV to BOS?
September is the weakest month at 45.6% on time, compared with 82.4% in January. Across the year that is 37 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
- BOS to SAV — the return legseparate record
- Boston Logan International (BOS) delay statistics
- JetBlue Airways on SAV to BOS69.1%
- Republic Airways on SAV to BOS68.0%
- SAV to ATL, a related route88.8%
- DCA to BOS, a related route71.4%
- SAV to CLT, a related route85.4%
- Allegiant Air on-time record88.9%
- JetBlue Airways on-time record69.1%
- Republic Airways on-time record68.0%
- The US routes with the most cancellations
- What a cancellation rate actually tells you (and what it hides)
Direction matters. SAV to BOS and BOS to SAV are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed SAV to BOS’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
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.