Seattle (SEA) to Nashville (BNA): On-Time Performance
Data through July 2026
When you fly SEA to BNA matters as much as anything else about the booking: the route swung from 92% on-time in April 2026 to just 63% in June 2025. Across the full period the route averages 77% on-time against a national 78%.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.6%
- Flights/day
- 4.0
- last 12 months
- Duration
- 4h 24m
- scheduled
- Distance
- 1,978 mi
Best airline from SEA to BNA
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 82% | 12 min | 0.5% | 960 |
| Alaska Airlines | 75% | 11 min | 0.7% | 1,814 |
| Southwest Airlines | 62% | 19 min | 0.0% | 204 |
Monthly on-time trend
Best time to fly from SEA to BNA
Aim for departures around 6 p.m. (88% on-time); avoid 10 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 13 min |
| Tuesday | 78% | 11 min |
| Wednesdaybest | 79% | 11 min |
| Thursday | 75% | 12 min |
| Friday | 74% | 14 min |
| Saturday | 78% | 12 min |
| Sunday | 75% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations41%
- National airspace system22%
- Weather1%
Frequently asked questions
- How often are flights from SEA to BNA delayed?
- 24% of SEA–BNA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 12 minutes.
- Which airline is most reliable from SEA to BNA?
- Delta Air Lines has the best on-time record on this route at 82%, based on 960 flights. 3 airlines flew SEA–BNA frequently enough to compare in this period.
- What is the best time of day to fly from SEA to BNA?
- Departures around 6 p.m. have the best record (88% on-time), while departures around 10 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SEA to BNA?
- The scheduled SEA–BNA flight time averages 4h 24m over 1,978 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are SEA to BNA flights cancelled?
- 0.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SEA to BNA?
- June 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was April 2026 at 92%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 2,978 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.