Best Time to Fly PWM to BNA: On-Time Stats by Hour & Airline
Portland International Jetport → Nashville International
Data through July 2026 · Last updated October 18, 2026
159 flights were scheduled from Portland (PWM) to Nashville (BNA) in the last 12 months, and 73.2% of those that flew arrived on time, 4.4 points below the US 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 (85% on time) and July the worst month (48%).
The cancellation rate was 0.6% (US average 1.8%).
PWM to BNA 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 | 73.2% | 47 min | 0.6% | 159 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PWM to BNA
On-time arrival % by scheduled departure hour (local time), 315 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 14 | |
| 9am–10am | Limited data | 5 | |
| 10am–11am | Limited data | 3 | |
| 11am–12pm | Limited data | 5 | |
| 12pm–1pm | Limited data | 8 | |
| 1pm–2pm | 70.2% | 0.0% | 67 |
| 2pm–3pm | Limited data | 22 | |
| 3pm–4pm | 63.2% | 0.0% | 107 |
| 4pm–5pm | 71.4% | 0.0% | 35 |
| 5pm–6pm | 75.8% | 0.0% | 33 |
| 7pm–8pm | Limited data | 16 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PWM to BNA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 59.2% | -21.0 pts | 0.8% | 122 |
| All other days | 80.2% | — | 0.0% | 193 |
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).