Carrier performance at one airport
YX→BOS
Republic Airways at Boston Logan International
- Departures
- 34,798
- Period
- September 2025 to August 2026
- Routes
- 25
- Rank here
- #5 of 11
Republic Airways at Boston carries a cancellation problem, not just a delay problem: 4.4% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, close to three flights in four 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 34,798 flights, of which Allegiant Air flew 586 at 82.1% on time.
Measured against the airport rather than the country, Republic Airways runs 3 points ahead of the 74.6% 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
77.2%
33,214 completed departures
Avg delay
68 min
Across delayed flights only
Cancelled
4.38%
At BOS, this carrier only
Rank here
#5
Of 11 carriers clearing the floor at BOS
These figures cover 35,000 flights between September 2025 and August 2026. Beyond the headline rate, 9.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Against the competition
Every carrier at BOS, ranked
The choice of carrier is not cosmetic here. Allegiant Air arrives on time 82.1% of the time; Spirit Airlines manages 61.6%. Sample sizes sit next to every figure, because a two-point gap across 1,737 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Allegiant Air | 586 | 82.1% | 79 min | 0.68% | B+ |
| Envoy Air | 2,055 | 79.1% | 86 min | 2.29% | B |
| American Airlines | 17,138 | 78.2% | 93 min | 2.54% | B |
| United Airlines | 13,042 | 77.7% | 78 min | 1.92% | B |
| Republic Airways (this page) | 34,798 | 77.2% | 68 min | 4.38% | B− |
| Delta Air Lines | 26,567 | 76.0% | 73 min | 2.16% | B |
| Alaska Airlines | 2,420 | 71.4% | 57 min | 1.36% | C |
| JetBlue Airways | 37,517 | 70.1% | 71 min | 3.41% | C− |
| Southwest Airlines | 7,340 | 69.3% | 62 min | 1.66% | C |
| Frontier Airlines | 926 | 68.0% | 65 min | 1.84% | C |
| Spirit Airlines | 1,737 | 61.6% | 80 min | 5.87% | D− |
Spirit Airlines cancels 5.9% 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 | 6,971 | 75.2% | 77 min | 6.50% | B− |
| BOS to DCA · Washington | 3,999 | 75.1% | 62 min | 3.90% | B− |
| BOS to JFK · New York | 2,857 | 74.6% | 64 min | 5.99% | C− |
| BOS to IND · Indianapolis | 1,975 | 80.5% | 69 min | 2.43% | B |
| BOS to CMH · Columbus | 1,886 | 79.6% | 74 min | 2.86% | B |
| BOS to PHL · Philadelphia | 1,824 | 78.4% | 72 min | 4.22% | B− |
| BOS to CVG · Cincinnati | 1,673 | 80.7% | 56 min | 3.17% | B− |
| BOS to CLT · Charlotte | 1,214 | 79.7% | 68 min | 3.54% | B− |
| BOS to EWR · Newark | 1,165 | 75.3% | 66 min | 6.78% | B− |
| BOS to PIT · Pittsburgh | 1,158 | 79.0% | 67 min | 3.28% | B− |
| BOS to BWI · Baltimore | 1,099 | 81.8% | 68 min | 4.28% | B− |
| BOS to RIC · Richmond | 934 | 79.3% | 62 min | 3.43% | B− |
| BOS to ORD · Chicago | 930 | 71.2% | 82 min | 5.91% | C− |
| BOS to JAX · Jacksonville | 894 | 72.5% | 65 min | 2.13% | C |
| BOS to CLE · Cleveland | 881 | 76.1% | 62 min | 2.61% | B |
| BOS to MKE · Milwaukee | 540 | 82.2% | 54 min | 4.26% | B− |
| BOS to SDF · Louisville | 485 | 84.4% | 50 min | 2.06% | B |
| BOS to BNA · Nashville | 475 | 73.9% | 68 min | 4.00% | C− |
| BOS to SAV · Savannah | 426 | 81.0% | 47 min | 2.35% | B |
| BOS to BUF · Buffalo | 386 | 82.8% | 72 min | 3.37% | B− |
| BOS to ROC · Rochesterthin sample | 359 | 70.8% | 67 min | 4.46% | C− |
| BOS to STL · St. Louisthin sample | 329 | 76.3% | 64 min | 4.26% | B− |
| BOS to MEM · Memphisthin sample | 295 | 65.8% | 62 min | 5.42% | C− |
| BOS to ORF · Norfolkthin sample | 261 | 88.7% | 80 min | 1.92% | A |
| BOS to MCI · Kansas Citythin sample | 225 | 82.5% | 51 min | 3.11% | B− |
Flight by flight
Republic Airways flight numbers from BOS
34 Republic Airways flight numbers leaving BOS flew their main route often enough to have a record of their own. Grouped by destination.
- YX 5644to BWI 17:2576.7%
- YX 5655to CLE 20:5060.5%
- YX 5626to CLT 06:2589.3%
- YX 5630to CLT 10:0586.0%
- YX 5807to CLT 19:4064.0%
- YX 4641to CMH 18:0467.7%
- YX 5653to CMH 14:3879.9%
- YX 5601to CVG 08:4587.6%
- YX 5789to CVG 14:3581.3%
- YX 5672to DCA 11:5583.1%
- YX 5689to DCA 15:5568.6%
- YX 5692to DCA 07:3588.9%
- YX 5693to DCA 09:1585.1%
- YX 5718to EWR 18:1561.1%
- YX 4585to IND 20:3664.2%
- YX 4725to IND 07:0088.4%
- YX 5616to IND 17:4575.6%
- YX 5627to IND 13:5982.0%
- YX 5720to JFK 09:0585.1%
- YX 5808to JFK 13:3573.8%
- YX 5814to JFK 17:0563.2%
- YX 5716to LGA 19:0061.4%
- YX 5721to LGA 17:0067.1%
- YX 5730to LGA 14:0077.1%
- YX 5732to LGA 09:0086.1%
- YX 5735to LGA 08:0085.7%
- YX 5736to LGA 15:0073.5%
- YX 5744to LGA 10:0085.8%
- YX 5748to LGA 13:0079.2%
- YX 5831to LGA 18:0062.2%
- YX 5594to MEM 21:1565.8%
- YX 5619to MKE 20:4576.9%
- YX 5845to PHL 06:5089.0%
- YX 5665to RIC 16:1076.5%
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 28 points, against 20 points between the best and worst carrier.
- 5am–8am3,684 flights91.1%
- 8am–11am7,905 flights86.5%
- 11am–2pm6,003 flights79.4%
- 2pm–5pm7,073 flights74.7%
- 5pm–8pm5,864 flights65.9%
- 8pm–5am4,269 flights63.0%
Scale runs 55% to 95%.
The 8pm–5am window is where this operation falls apart: 63.0% on time, against 91.1% 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 7,905 flights scheduled in it.
Across the year
Seasonal pattern
July is the worst month at 72.3% on time, 10 points below May, the best at 81.9%. 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. July was the busiest month here, with 3,312 flights.
Delay causes
What holds this operation up
- 40%Late-arriving aircraft
- 30%National Airspace System
- 26%Carrier
- 3%Extreme weather
- 0%Security
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 516,000 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 516,371 reported delay minutes.
Cancellations run at 4.38%, against 1.89% nationally. That is roughly 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.
9.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
34,798 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 4.38% cancellation rate. A late arrival costs you a little over 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. 33,214 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 four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.8% of the 34,798 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on Republic Airways at BOS?
Allegiant Air leads at 82.1% on time across 586 flights. Spirit Airlines is at the other end on 61.6%, 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 91.1% on time. The 8pm–5am window is the weakest at 63.0%, 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 July delays on Republic Airways at BOS?
July is the weakest month at 72.3% on time, compared with 81.9% in May. Across the year that is 10 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.