PlainFlights

Route · BNA → SEA · 2020–2025 BTS data

Nashville to Seattle

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BNA to SEA (Nashville to Seattle) ranks #1868 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

81.1%
On-time
+2.1 pts
vs US avg
59 min
Delay when late
6,766
Flights
#1868 of 4927
Corpus placement

Cancelled

0.9%

Best Month

Feb 2024 93%

Worst Month

Dec 2025 56%

Distance

1,978 mi

Carriers

7

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 90 40 0 1 DL,AS
Nov 2025 88 21 0 0 AS,DL
Oct 2025 117 26 2 1 AS,DL,WN
Sep 2025 135 34 0 0 WN,DL,AS
Aug 2025 176 63 2 0 WN,AS,DL
Jul 2025 188 52 1 1 AS,DL,WN
Jun 2025 173 49 1 0 AS,DL,WN
May 2025 124 17 1 1 AS,DL
Apr 2025 98 21 1 0 AS,DL
Mar 2025 90 16 1 0 AS,DL
Feb 2025 76 22 0 0 AS,DL
Jan 2025 82 12 1 0 AS,DL
Dec 2024 91 21 0 0 AS,DL
Nov 2024 88 11 0 0 AS,DL
Oct 2024 113 10 1 0 AS,DL
Sep 2024 125 19 0 0 WN,AS,DL
Aug 2024 126 22 1 0 AS,DL,WN
Jul 2024 128 20 1 0 AS,DL,WN
Jun 2024 125 31 0 0 AS,DL,WN
May 2024 122 35 0 0 AS,DL
Apr 2024 116 19 0 0 AS,DL
Mar 2024 105 10 0 0 AS,DL
Feb 2024 83 6 0 0 AS,DL
Jan 2024 90 16 11 0 AS,DL

BNA–SEA seasonal on-time pattern

Best: March (85.9%) · weakest: December (75.1%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 75.1%

Strongest calendar month

March

85.9% on-time · ~93 flights/mo

Busiest calendar month

July

~113 flights/mo avg

Weakest calendar month

December

75.1% on-time · ~83 flights/mo

Cancellation Rate

0.9%

24 of 2,749 flights

Diversion Rate

0.1%

4 of 2,749 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

BNA - Nashville

Full on-time, delay-cause, and seasonal performance for Nashville, TN.

BNA on-time profile

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

Compare the two airports

See BNA and SEA side by side on delays, cancellations, and reliability.

Compare BNA vs SEA

Origin-hub reliability standing

Mid-pack among BNA departures

From BNA, this corridor sits with 52 other 75–85% on-time routes out of 61 tracked departures, not the hub's reliability leaders (6 at ≥85%) and not the softest ( 3 below 75%). Destination: Seattle · fleet on-time rank #2679 of 4927.

What the Data Says About BNA to SEA

6,766 tracked flights put the BNA to SEA pairing (Nashville to Seattle) at a 81.1% on-time rate, squarely in line with the wider network. Delays that do occur run 58.7 minutes on average. Across the 1,978-mile route and its 7 carriers, the trailing 24 months show 0.9% cancelled and 0.1% diverted (2,749 flights sampled).

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 93% on-time, while Dec 2025 came in at just 56% - a 37-point swing worth factoring into travel timing.

On the multi-year calendar, BNA–SEA peaks in March at 85.9% on-time while July carries the heaviest traffic (~113 flights per month) ; the softest month is December at 75.1%, a 10.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does BNA to SEA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, BNA to SEA ranks #1868 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from BNA to SEA? ▼
Flights from Nashville to Seattle have a 81.1% on-time rate based on 6,766 flights. The average delay is 58.7 minutes. The best recent month was Feb 2024 with 93% on-time.
What is the cancellation rate for BNA to SEA? ▼
Over the last 24 months, 0.9% of flights on this route were cancelled (24 of 2,749 flights) and 0.1% were diverted.
How far is the flight from BNA to SEA? ▼
The flight distance from Nashville (BNA) to Seattle (SEA) is approximately 1,978 miles. This route is served by 7 carriers.
When is the best time to fly from BNA to SEA? ▼
The best recent month for on-time performance was Feb 2024 (93% on-time). The worst was Dec 2025 (56% on-time). Consider booking during months with historically better performance.

Airports on this route

BNA Airport

Nashville
SEA Airport

Seattle
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using BNA–SEA data

BNA–SEA is mid-pack at 81.1% on-time; month and carrier mix move more than the corridor headline.

  • Compare BNA and SEA airport profiles: delay causes and top routes differ even on the same corridor. BNA airport
  • If your dates flex, March (85.9% on-time) beats December (75.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 81.1% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.