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Route · SEA → CMH · 2020–2025 BTS data

Seattle to Columbus

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to CMH (Seattle to Columbus) ranks #4064 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

79.7%
On-time
+0.7 pts
vs US avg
45 min
Delay when late
1,618
Flights
#4064 of 4927
Corpus placement

Cancelled

0.1%

Best Month

Jul 2023 89%

Worst Month

Jul 2025 57%

Distance

2,016 mi

Carriers

2

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 31 9 0 0 AS
Oct 2025 33 6 0 0 AS
Sep 2025 51 12 0 0 UA,DL,WN,AA,AS
Aug 2025 57 21 0 0 AS
Jul 2025 61 26 0 0 AS
Jun 2025 60 23 0 0 AS
May 2025 49 18 0 0 AS
Apr 2025 30 5 0 1 AS
Nov 2024 30 2 1 0 AS
Oct 2024 31 1 0 0 AS
Sep 2024 48 17 0 0 AS
Aug 2024 56 17 0 0 AS
Jul 2024 62 11 0 0 AS
Jun 2024 60 10 0 0 AS
May 2024 47 9 0 0 AS
Apr 2024 30 8 0 0 AS
Mar 2024 31 7 0 0 AS
Nov 2023 30 3 0 0 AS
Oct 2023 31 2 0 0 AS
Sep 2023 60 12 0 0 AS
Aug 2023 62 9 0 1 AS
Jul 2023 62 7 0 1 AS
Jun 2023 46 14 0 0 AS
May 2023 31 5 0 0 AS

SEA–CMH seasonal on-time pattern

Best: November (91.7%) · weakest: December (66.1%)

60%70%80%90%100% MarAprMayJunJulAugSepOctNovDec 66.1%

Strongest calendar month

November

91.7% on-time · ~30 flights/mo

Busiest calendar month

July

~46 flights/mo avg

Weakest calendar month

December

66.1% on-time · ~31 flights/mo

Cancellation Rate

0.1%

1 of 1,089 flights

Diversion Rate

0.3%

3 of 1,089 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

CMH - Columbus

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

CMH on-time profile

Compare the two airports

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

Compare SEA vs CMH

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: Columbus · fleet on-time rank #3285 of 4927.

What the Data Says About SEA to CMH

1,618 tracked flights put the SEA to CMH pairing (Seattle to Columbus) at a 79.7% on-time rate, squarely in line with the wider network. Delays that do occur run 44.7 minutes on average. Across the 2,016-mile route and its 2 carriers, the trailing 24 months show 0.1% cancelled and 0.3% diverted (1,089 flights sampled).

The monthly split is wide on this route: Jul 2023 posted the strongest performance at 89% on-time, while Jul 2025 came in at just 57% - a 31-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–CMH peaks in November at 91.7% on-time while July carries the heaviest traffic (~46 flights per month) ; the softest month is December at 66.1%, a 25.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to CMH rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to CMH ranks #4064 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 CMH? ▼
Flights from Seattle to Columbus have a 79.7% on-time rate based on 1,618 flights. The average delay is 44.7 minutes. The best recent month was Jul 2023 with 89% on-time.
What is the cancellation rate for SEA to CMH? ▼
Over the last 24 months, 0.1% of flights on this route were cancelled (1 of 1,089 flights) and 0.3% were diverted.
How far is the flight from SEA to CMH? ▼
The flight distance from Seattle (SEA) to Columbus (CMH) is approximately 2,016 miles. This route is served by 2 carriers.
When is the best time to fly from SEA to CMH? ▼
The best recent month for on-time performance was Jul 2023 (89% on-time). The worst was Jul 2025 (57% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
CMH Airport

Columbus
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–CMH data

SEA–CMH is mid-pack at 79.7% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and CMH airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, November (91.7% on-time) beats December (66.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 79.7% 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.