Best Time to Fly BOS to BWI: On-Time Stats by Hour & Airline
Logan International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
3,513 flights were scheduled from Boston (BOS) to Baltimore (BWI) in the last 12 months, and 78.9% of those that flew arrived on time, 1.3 points above the US average of 77.6%.
Republic Airways was the most punctual of the 3 airlines on the route at 82.0%, while Spirit Airlines trailed at 69.8%.
January has been the best month (90% on time) and Sunday the weakest day of the week (74%).
2.7% of flights were cancelled, versus 1.8% nationally.
BOS to BWI on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airways | 82.0% | 69 min | 3.8% | 1,094 |
| Southwest Airlines | 77.7% | 66 min | 2.1% | 2,374 |
| Spirit Airlines | 69.8% | 64 min | 4.4% | 45 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOS to BWI
On-time arrival % by scheduled departure hour (local time), 7,705 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.5% | 1.3% | 603 |
| 6am–7am | 91.4% | 1.4% | 636 |
| 7am–8am | 90.3% | 1.3% | 395 |
| 8am–9am | 90.6% | 2.0% | 706 |
| 9am–10am | 93.3% | 1.4% | 350 |
| 10am–11am | 87.9% | 0.0% | 372 |
| 11am–12pm | 87.9% | 0.5% | 191 |
| 12pm–1pm | 87.0% | 1.5% | 399 |
| 1pm–2pm | 85.8% | 1.7% | 645 |
| 2pm–3pm | 84.5% | 2.2% | 363 |
| 3pm–4pm | 76.7% | 2.0% | 488 |
| 4pm–5pm | 63.0% | 2.3% | 216 |
| 5pm–6pm | 70.1% | 3.0% | 838 |
| 6pm–7pm | 65.1% | 3.5% | 341 |
| 7pm–8pm | 52.4% | 2.0% | 346 |
| 8pm–9pm | 56.2% | 5.9% | 375 |
| 9pm–10pm | 58.2% | 4.1% | 295 |
| 10pm–11pm | 70.9% | 2.8% | 145 |
| 11pm–12am | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BOS to BWI
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 84.8% | +2.8 pts | 0.0% | 158 |
| Christmas & New Year (Dec 20 - Jan 3) | 80.1% | -1.9 pts | 1.9% | 267 |
| Summer peak (Jun 15 - Aug 15) | 71.9% | -10.0 pts | 4.7% | 1,396 |
| All other days | 82.0% | — | 1.6% | 5,884 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).