Route
SEA → BNA
Seattle–Tacoma International Airport Nashville International Airport
How punctual is this route?
- On-time arrivals
- 80.6%
- Less than 15 minutes late
- Cancelled
- 0.9%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,481
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 44%
- Late-arriving aircraft 33%
- Air traffic control & airport 20%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 77.6% | 134 |
| October 2025 | 78.3% | 117 |
| November 2025 | 84.1% | 88 |
| December 2025 | 78.9% | 90 |
| January 2026 | 82.9% | 81 |
| February 2026 | 90.8% | 76 |
| March 2026 | 87.8% | 91 |
| April 2026 | 92.4% | 118 |
| May 2026 | 83.0% | 143 |
| June 2026 | 81.8% | 177 |
| July 2026 | 68.3% | 185 |
| August 2026 | 76.1% | 181 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 845 | 82.1% | 0.9% | 50 min |
| Delta Air Lines | 516 | 83.0% | 1.0% | 67 min |
| Southwest Airlines | 120 | 60.0% | 0.0% | 44 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AS382
18% late · 314 flights
-
DL815
20% late · 294 flights
-
AS522
16% late · 285 flights
-
DL1710
14% late · 188 flights
-
AS1345
22% late · 69 flights
-
AS416
19% late · 68 flights
-
AS388
19% late · 49 flights
-
AS400
12% late · 35 flights
-
DL1921
9% late · 33 flights
-
WN2614
43% late · 28 flights
-
WN536
48% late · 27 flights
-
WN1150
22% late · 23 flights
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