Carrier performance at one airport
YX→BOS
Republic Airways at Boston Logan International
- Departures
- 33,650
- Period
- July 2025 to June 2026
- Routes
- 25
- Rank here
- #5 of 11
Republic Airways at Boston carries a cancellation problem, not just a delay problem: 3.9% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, about four flights in five arrive on time, worth a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 33,650 flights, of which Allegiant Air flew 633 at 84.9% on time.
Measured against the airport rather than the country, Republic Airways runs 2 points ahead of the 75.7% weighted average across all carriers at BOS. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
78.1%
32,299 completed departures
Avg delay
67 min
Across delayed flights only
Cancelled
3.88%
At BOS, this carrier only
Rank here
#5
Of 11 carriers clearing the floor at BOS
These figures cover 34,000 flights between July 2025 and June 2026. Beyond the headline rate, 8.6% 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.
Against the competition
Every carrier at BOS, ranked
The choice of carrier is not cosmetic here. Allegiant Air arrives on time 84.9% of the time; Spirit Airlines manages 65.3%. Sample sizes sit next to every figure, because a two-point gap across 2,325 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Allegiant Air | 633 | 84.9% | 86 min | 0.47% | B+ |
| Envoy Air | 2,013 | 79.9% | 74 min | 2.24% | B |
| United Airlines | 12,917 | 78.6% | 76 min | 1.90% | B |
| American Airlines | 16,933 | 78.3% | 91 min | 2.56% | B |
| Republic Airways (this page) | 33,650 | 78.1% | 67 min | 3.88% | B− |
| Delta Air Lines | 26,419 | 76.8% | 73 min | 2.03% | B |
| JetBlue Airways | 37,487 | 72.0% | 70 min | 2.51% | C |
| Southwest Airlines | 7,197 | 71.3% | 63 min | 1.53% | C |
| Alaska Airlines | 2,486 | 71.2% | 53 min | 1.17% | C |
| Frontier Airlines | 931 | 70.3% | 60 min | 1.83% | C |
| Spirit Airlines | 2,325 | 65.3% | 79 min | 4.82% | C− |
Spirit Airlines cancels 4.8% 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.
Route by route
Where Republic Airways flies from BOS
Republic Airways operates 25 routes out of BOS with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| BOS to LGA · New York | 6,708 | 76.6% | 75 min | 5.81% | B− |
| BOS to DCA · Washington | 3,985 | 75.6% | 62 min | 4.22% | B− |
| BOS to JFK · New York | 2,915 | 75.1% | 66 min | 5.01% | B− |
| BOS to IND · Indianapolis | 1,962 | 81.9% | 68 min | 2.24% | B |
| BOS to CMH · Columbus | 1,911 | 80.3% | 70 min | 2.41% | B |
| BOS to PHL · Philadelphia | 1,763 | 79.1% | 69 min | 3.29% | B− |
| BOS to CVG · Cincinnati | 1,557 | 82.3% | 54 min | 3.08% | B− |
| BOS to CLT · Charlotte | 1,199 | 80.5% | 67 min | 3.42% | B− |
| BOS to EWR · Newark | 1,187 | 73.7% | 69 min | 6.32% | C− |
| BOS to PIT · Pittsburgh | 1,144 | 80.6% | 65 min | 2.45% | B |
| BOS to BWI · Baltimore | 1,086 | 81.9% | 76 min | 3.31% | B− |
| BOS to RIC · Richmond | 937 | 80.1% | 62 min | 2.77% | B |
| BOS to ORD · Chicago | 894 | 70.4% | 81 min | 5.93% | C− |
| BOS to JAX · Jacksonville | 892 | 74.4% | 61 min | 2.24% | C |
| BOS to CLE · Cleveland | 868 | 77.8% | 62 min | 2.42% | B |
| BOS to MKE · Milwaukee | 549 | 80.8% | 59 min | 4.01% | B− |
| BOS to SDF · Louisville | 505 | 84.4% | 46 min | 1.78% | B |
| BOS to BNA · Nashville | 500 | 71.5% | 71 min | 4.00% | C− |
| BOS to SAV · Savannah | 416 | 80.5% | 44 min | 1.44% | B |
| BOS to MCI · Kansas Citythin sample | 334 | 82.4% | 52 min | 2.69% | B |
| BOS to MEM · Memphisthin sample | 292 | 67.1% | 63 min | 4.79% | C− |
| BOS to STL · St. Louisthin sample | 258 | 82.3% | 49 min | 3.10% | B− |
| BOS to ORF · Norfolkthin sample | 255 | 90.2% | 80 min | 0.00% | A+ |
| BOS to ROC · Rochesterthin sample | 244 | 75.4% | 56 min | 1.23% | B |
| BOS to BUF · Buffalothin sample | 221 | 83.9% | 49 min | 1.36% | B |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 27 points, against 20 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am3,617 flights91.5%
- 8am–11am7,618 flights87.2%
- 11am–2pm5,787 flights80.7%
- 2pm–5pm6,974 flights75.3%
- 5pm–8pm5,860 flights66.8%
- 8pm–5am3,794 flights64.3%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 64.3% on time, against 91.5% 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 8am–11am window is the busiest, with 7,618 flights scheduled in it.
Across the year
Seasonal pattern
July is the worst month at 71.9% on time, 14 points below August, the best at 85.5%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. June was the busiest month here, with 3,121 flights.
Delay causes
What holds this operation up
- 39%Late-arriving aircraft
- 31%National Airspace System
- 26%Carrier
- 3%Extreme weather
- 0%Security
39% 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 473,000 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 472,651 reported delay minutes.
Cancellations run at 3.88%, 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.
8.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route are the about an hour kind, which a normal layover absorbs.
33,650 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: the delay figures matter less here than the 3.88% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 32,299 completed flights over 12 months sit behind that.
Common questions
Republic Airways at BOS
How often is Republic Airways at BOS delayed?
Roughly one flight in five arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 21.9% of the 33,650 flights in this analysis, against 22.4% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on Republic Airways at BOS?
Allegiant Air leads at 84.9% on time across 633 flights. Spirit Airlines is at the other end on 65.3%, a gap of 20 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 Republic Airways at BOS?
The 5am–8am departure window is the strongest at 91.5% on time. The 8pm–5am window is the weakest at 64.3%, 27 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 July delays on Republic Airways at BOS?
July is the weakest month at 71.9% on time, compared with 85.5% in August. Across the year that is 14 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
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.