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Route · SEA → CVG · 2020–2025 BTS data

Seattle to Cincinnati

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to CVG (Seattle to Cincinnati) ranks #3164 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

82.4%
On-time
+3.4 pts
vs US avg
61 min
Delay when late
3,371
Flights
#3164 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Jun 2024 93%

Worst Month

Jul 2025 64%

Distance

1,965 mi

Carriers

2

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 60 10 1 0 DL,AS
Nov 2025 57 8 0 0 AS,DL
Oct 2025 61 5 1 0 AS,DL
Sep 2025 60 5 0 0 DL,AS
Aug 2025 80 23 0 2 AS,DL
Jul 2025 92 33 0 2 AS,DL
Jun 2025 80 17 0 1 AS,DL
May 2025 62 15 0 0 AS,DL
Apr 2025 60 9 0 1 DL,AS
Mar 2025 56 5 0 0 AS,DL
Feb 2025 48 6 0 0 AS,DL
Jan 2025 55 11 2 0 AS,DL
Dec 2024 57 13 0 0 AS,DL
Nov 2024 57 5 0 0 AS,DL
Oct 2024 61 8 0 0 AS,DL
Sep 2024 60 16 0 0 AS,DL
Aug 2024 62 17 0 0 AS,DL
Jul 2024 62 13 4 0 AS,DL
Jun 2024 60 4 0 0 AS,DL
May 2024 62 10 0 0 AS,DL
Apr 2024 60 13 0 1 AS,DL
Mar 2024 60 5 0 0 AS,DL
Feb 2024 54 6 0 0 AS,DL
Jan 2024 59 5 9 0 AS,DL

SEA–CVG seasonal on-time pattern

Best: March (88.6%) · weakest: December (76.1%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 76.1%

Strongest calendar month

March

88.6% on-time · ~57 flights/mo

Busiest calendar month

July

~72 flights/mo avg

Weakest calendar month

December

76.1% on-time · ~58 flights/mo

Cancellation Rate

1.1%

17 of 1,485 flights

Diversion Rate

0.5%

7 of 1,485 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

CVG - Cincinnati

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

CVG on-time profile

Compare the two airports

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

Compare SEA vs CVG

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: Cincinnati · fleet on-time rank #2204 of 4927.

What the Data Says About SEA to CVG

Bureau of Transportation Statistics records show Seattle to Cincinnati (SEA to CVG) running a 82.4% on-time rate over 3,371 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 61.4 minutes. The 1,965-mile corridor is served by 2 carriers, and over the last 24 months 1.1% of 1,485 flights were cancelled, 0.5% diverted.

The monthly split is wide on this route: Jun 2024 posted the strongest performance at 93% on-time, while Jul 2025 came in at just 64% - a 29-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–CVG peaks in March at 88.6% on-time while July carries the heaviest traffic (~72 flights per month) ; the softest month is December at 76.1%, a 12.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to CVG rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to CVG ranks #3164 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 CVG? ▼
Flights from Seattle to Cincinnati have a 82.4% on-time rate based on 3,371 flights. The average delay is 61.4 minutes. The best recent month was Jun 2024 with 93% on-time.
What is the cancellation rate for SEA to CVG? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (17 of 1,485 flights) and 0.5% were diverted.
How far is the flight from SEA to CVG? ▼
The flight distance from Seattle (SEA) to Cincinnati (CVG) is approximately 1,965 miles. This route is served by 2 carriers.
When is the best time to fly from SEA to CVG? ▼
The best recent month for on-time performance was Jun 2024 (93% on-time). The worst was Jul 2025 (64% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
CVG Airport

Cincinnati
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–CVG data

SEA–CVG runs 3.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SEA and CVG airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, March (88.6% on-time) beats December (76.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 82.4% 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.