Best Time to Fly BWI to MHT: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Manchester Boston Regional
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 84.2% of Baltimore (BWI) to Manchester (MHT) flights arrived on time (1,745 scheduled flights). That is 6.5 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (87% on time) and July the worst month (71%).
The cancellation rate was 1.1% (US average 1.8%).
BWI to MHT 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 |
|---|---|---|---|---|
| Southwest Airlines | 84.2% | 57 min | 1.1% | 1,745 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to MHT
On-time arrival % by scheduled departure hour (local time), 3,334 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 96.0% | 1.3% | 231 |
| 7am–8am | 96.2% | 0.0% | 160 |
| 8am–9am | 94.2% | 0.0% | 137 |
| 9am–10am | 85.1% | 0.0% | 121 |
| 10am–11am | 91.4% | 0.3% | 327 |
| 11am–12pm | 88.3% | 0.6% | 180 |
| 12pm–1pm | 89.7% | 1.7% | 120 |
| 1pm–2pm | 83.0% | 1.3% | 232 |
| 2pm–3pm | 77.9% | 0.5% | 200 |
| 3pm–4pm | 82.9% | 0.4% | 252 |
| 4pm–5pm | 80.7% | 0.0% | 136 |
| 5pm–6pm | 70.5% | 0.5% | 191 |
| 6pm–7pm | 73.9% | 0.7% | 139 |
| 7pm–8pm | 64.8% | 1.8% | 110 |
| 8pm–9pm | 75.1% | 1.6% | 184 |
| 9pm–10pm | 72.0% | 1.3% | 301 |
| 10pm–11pm | 60.2% | 2.9% | 313 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to MHT
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) | 78.8% | -4.8 pts | 0.0% | 66 |
| Christmas & New Year (Dec 20 - Jan 3) | 67.1% | -16.5 pts | 0.0% | 146 |
| Summer peak (Jun 15 - Aug 15) | 71.8% | -11.8 pts | 2.3% | 571 |
| All other days | 83.6% | — | 0.7% | 2,551 |
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).