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Route · SEA → BNA · 2020–2025 BTS data

Seattle to Nashville

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to BNA (Seattle to Nashville) ranks #1869 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

80.1%
On-time
+1.1 pts
vs US avg
52 min
Delay when late
6,765
Flights
#1869 of 4927
Corpus placement

Cancelled

0.6%

Best Month

Jan 2025 90%

Worst Month

Jun 2025 64%

Distance

1,978 mi

Carriers

8

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 90 19 0 0 DL,AS
Nov 2025 88 14 0 0 AS,DL
Oct 2025 117 25 2 0 AS,WN,DL
Sep 2025 134 30 0 0 WN,DL,AS
Aug 2025 176 63 1 0 WN,AS,DL
Jul 2025 188 67 1 0 AS,WN,DL
Jun 2025 173 62 0 2 AS,WN,DL
May 2025 124 33 1 2 AS,DL
Apr 2025 99 28 1 0 DL,AS
Mar 2025 90 14 0 0 AS,DL
Feb 2025 76 13 0 0 AS,DL
Jan 2025 82 8 1 0 AS,DL
Dec 2024 91 16 0 0 AS,DL
Nov 2024 88 19 0 0 AS,DL
Oct 2024 112 15 0 1 AS,DL
Sep 2024 125 34 0 0 WN,AS,DL
Aug 2024 126 36 0 0 AS,DL,WN
Jul 2024 128 39 0 0 AS,DL,WN
Jun 2024 125 32 0 0 AS,DL,WN
May 2024 122 27 0 4 AS,DL
Apr 2024 116 24 0 0 AS,DL
Mar 2024 106 12 0 0 AS,DL
Feb 2024 83 15 0 0 AS,DL
Jan 2024 90 19 9 0 AS,DL

SEA–BNA seasonal on-time pattern

Best: March (86.3%) · weakest: August (73.4%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 81.9%

Strongest calendar month

March

86.3% on-time · ~94 flights/mo

Busiest calendar month

July

~113 flights/mo avg

Weakest calendar month

August

73.4% on-time · ~112 flights/mo

Cancellation Rate

0.6%

16 of 2,749 flights

Diversion Rate

0.3%

9 of 2,749 flights

Explore origin & destination

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

SEA - Seattle

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

SEA on-time profile

BNA - Nashville

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

BNA on-time profile

Compare the two airports

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

Compare SEA vs BNA

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Nashville · fleet on-time rank #3113 of 4927.

What the Data Says About SEA to BNA

6,765 tracked flights put the SEA to BNA pairing (Seattle to Nashville) at a 80.1% on-time rate, squarely in line with the wider network. Delays that do occur run 52.0 minutes on average. Across the 1,978-mile route and its 8 carriers, the trailing 24 months show 0.6% cancelled and 0.3% diverted (2,749 flights sampled).

The monthly split is wide on this route: Jan 2025 posted the strongest performance at 90% on-time, while Jun 2025 came in at just 64% - a 26-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–BNA peaks in March at 86.3% on-time while July carries the heaviest traffic (~113 flights per month) ; the softest month is August at 73.4%, a 12.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to BNA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to BNA ranks #1869 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 SEA to BNA? ▼
Flights from Seattle to Nashville have a 80.1% on-time rate based on 6,765 flights. The average delay is 52.0 minutes. The best recent month was Jan 2025 with 90% on-time.
What is the cancellation rate for SEA to BNA? ▼
Over the last 24 months, 0.6% of flights on this route were cancelled (16 of 2,749 flights) and 0.3% were diverted.
How far is the flight from SEA to BNA? ▼
The flight distance from Seattle (SEA) to Nashville (BNA) is approximately 1,978 miles. This route is served by 8 carriers.
When is the best time to fly from SEA to BNA? ▼
The best recent month for on-time performance was Jan 2025 (90% on-time). The worst was Jun 2025 (64% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
BNA Airport

Nashville
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 SEA–BNA data

SEA–BNA is mid-pack at 80.1% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and BNA airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, March (86.3% on-time) beats August (73.4%) on this corridor. Seasonal chart
  • 4 other routes post a similar 80.1% 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.