Best Time to Fly BNA to SEA: On-Time Stats by Hour & Airline
Nashville International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 71.7% of Nashville (BNA) to Seattle (SEA) flights arrived on time (1,476 scheduled flights). That is 5.9 points below the national average of 77.6%.
Delta Air Lines was the most punctual of the 3 airlines on the route at 81.2%, while Southwest Airlines trailed at 40.8%.
October has been the best month (84% on time) and Thursday the weakest day of the week (69%).
1.2% of flights were cancelled, versus 1.8% nationally.
BNA to SEA 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 |
|---|---|---|---|---|
| Delta Air Lines | 81.2% | 64 min | 1.2% | 512 |
| Alaska Airlines | 70.4% | 46 min | 1.3% | 843 |
| Southwest Airlines | 40.8% | 50 min | 0.8% | 121 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BNA to SEA
On-time arrival % by scheduled departure hour (local time), 2,850 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 5 | |
| 7am–8am | 81.2% | 1.0% | 1,406 |
| 8am–9am | 90.0% | 3.2% | 31 |
| 9am–10am | 87.7% | 0.9% | 345 |
| 10am–11am | Limited data | 1 | |
| 12pm–1pm | Limited data | 8 | |
| 1pm–2pm | Limited data | 24 | |
| 2pm–3pm | 36.4% | 0.0% | 33 |
| 3pm–4pm | 56.3% | 1.4% | 72 |
| 4pm–5pm | 80.6% | 0.6% | 167 |
| 5pm–6pm | 66.5% | 1.1% | 462 |
| 6pm–7pm | 57.7% | 0.5% | 224 |
| 7pm–8pm | 49.1% | 0.0% | 56 |
| 8pm–9pm | 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 BNA to SEA
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) | 52.6% | -26.7 pts | 0.0% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 70.1% | -9.2 pts | 0.0% | 88 |
| Summer peak (Jun 15 - Aug 15) | 67.8% | -11.5 pts | 1.1% | 719 |
| All other days | 79.3% | — | 0.9% | 2,005 |
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).