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Route · CVG → SEA · 2020–2025 BTS data

Cincinnati to Seattle

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), CVG to SEA (Cincinnati to Seattle) ranks #3165 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

82.1%
On-time
+3.1 pts
vs US avg
62 min
Delay when late
3,370
Flights
#3165 of 4927
Corpus placement

Cancelled

1.5%

Best Month

Feb 2024 96%

Worst Month

Dec 2025 40%

Distance

1,965 mi

Carriers

2

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 60 36 1 0 DL,AS
Nov 2025 57 9 0 0 DL,AS
Oct 2025 61 9 1 0 AS,DL
Sep 2025 60 3 0 0 DL,AS
Aug 2025 81 22 0 0 AS,DL
Jul 2025 92 25 1 0 AS,DL
Jun 2025 79 24 0 0 AS,DL
May 2025 62 8 0 0 AS,DL
Apr 2025 60 10 0 0 DL,AS
Mar 2025 56 9 0 1 AS,DL
Feb 2025 48 16 1 0 AS,DL
Jan 2025 55 7 2 1 AS,DL
Dec 2024 57 11 0 0 AS,DL
Nov 2024 57 12 0 0 AS,DL
Oct 2024 61 4 0 0 AS,DL
Sep 2024 60 14 0 0 AS,DL
Aug 2024 62 17 0 0 AS,DL
Jul 2024 62 19 4 0 AS,DL
Jun 2024 60 15 0 0 AS,DL
May 2024 62 16 1 0 AS,DL
Apr 2024 60 11 1 0 AS,DL
Mar 2024 60 7 0 0 AS,DL
Feb 2024 54 2 1 0 AS,DL
Jan 2024 59 6 9 0 AS,DL

CVG–SEA seasonal on-time pattern

Best: October (92.2%) · weakest: December (69.1%)

60%70%80%90%100% JanFebMarAprMayJunJulAugSepOctNovDec 69.1%

Strongest calendar month

October

92.2% on-time · ~62 flights/mo

Busiest calendar month

July

~72 flights/mo avg

Weakest calendar month

December

69.1% on-time · ~58 flights/mo

Cancellation Rate

1.5%

22 of 1,485 flights

Diversion Rate

0.1%

2 of 1,485 flights

Explore origin & destination

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

CVG - Cincinnati

Full on-time, delay-cause, and seasonal performance for Cincinnati, OH.

CVG 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 CVG and SEA side by side on delays, cancellations, and reliability.

Compare CVG vs SEA

Origin-hub reliability standing

Mid-pack among CVG departures

From CVG, this corridor sits with 21 other 75–85% on-time routes out of 34 tracked departures, not the hub's reliability leaders (9 at ≥85%) and not the softest ( 4 below 75%). Destination: Seattle · fleet on-time rank #2304 of 4927.

What the Data Says About CVG to SEA

Bureau of Transportation Statistics records show Cincinnati to Seattle (CVG to SEA) running a 82.1% on-time rate over 3,370 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 61.9 minutes. The 1,965-mile corridor is served by 2 carriers, and over the last 24 months 1.5% of 1,485 flights were cancelled, 0.1% diverted.

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 96% on-time, while Dec 2025 came in at just 40% - a 56-point swing worth factoring into travel timing.

On the multi-year calendar, CVG–SEA peaks in October at 92.2% on-time while July carries the heaviest traffic (~72 flights per month) ; the softest month is December at 69.1%, a 23.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does CVG to SEA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, CVG to SEA ranks #3165 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 CVG to SEA? ▼
Flights from Cincinnati to Seattle have a 82.1% on-time rate based on 3,370 flights. The average delay is 61.9 minutes. The best recent month was Feb 2024 with 96% on-time.
What is the cancellation rate for CVG to SEA? ▼
Over the last 24 months, 1.5% of flights on this route were cancelled (22 of 1,485 flights) and 0.1% were diverted.
How far is the flight from CVG to SEA? ▼
The flight distance from Cincinnati (CVG) to Seattle (SEA) is approximately 1,965 miles. This route is served by 2 carriers.
When is the best time to fly from CVG to SEA? ▼
The best recent month for on-time performance was Feb 2024 (96% on-time). The worst was Dec 2025 (40% on-time). Consider booking during months with historically better performance.

Airports on this route

CVG Airport

Cincinnati
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 CVG–SEA data

CVG–SEA runs 3.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare CVG and SEA airport profiles: delay causes and top routes differ even on the same corridor. CVG airport
  • If your dates flex, October (92.2% on-time) beats December (69.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 82.1% 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.