PlainFlights

Route · SEA → CLE · 2020–2025 BTS data

Seattle to Cleveland

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to CLE (Seattle to Cleveland) ranks #4248 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

75.4%
On-time
-3.6 pts
vs US avg
44 min
Delay when late
1,361
Flights
#4248 of 4927
Corpus placement

Cancelled

0.7%

Best Month

Aug 2023 87%

Worst Month

Aug 2025 60%

Distance

2,021 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Oct 2025 32 9 1 0 AS
Sep 2025 47 13 0 0 AS
Aug 2025 57 23 0 0 AS
Jul 2025 61 18 1 0 AS
Jun 2025 60 17 0 0 AS
May 2025 49 14 0 0 AS
Apr 2025 30 14 0 0 AS
Jan 2025 31 9 0 0 AS
Oct 2024 31 5 0 0 AS
Sep 2024 48 27 0 0 AS
Aug 2024 56 15 1 0 AS
Jul 2024 62 13 0 0 AS
Jun 2024 60 14 0 0 AS
May 2024 47 10 0 0 AS
Apr 2024 30 4 0 1 AS
Mar 2024 31 7 0 0 AS
Jan 2024 31 2 5 0 AS
Nov 2023 30 7 0 0 AS
Oct 2023 31 9 0 0 AS
Sep 2023 60 15 0 0 AS
Aug 2023 62 8 0 0 AS
Jul 2023 62 13 0 1 AS
Jun 2023 46 19 0 1 AS
May 2023 31 11 0 0 AS

SEA–CLE seasonal on-time pattern

Best: January (83.9%) · weakest: September (68.1%)

65%70%75%80%85% JanMarAprMayJunJulAugSepOctNovDec 80.6%

Strongest calendar month

January

83.9% on-time · ~31 flights/mo

Busiest calendar month

June

~55 flights/mo avg

Weakest calendar month

September

68.1% on-time · ~46 flights/mo

Cancellation Rate

0.7%

8 of 1,085 flights

Diversion Rate

0.3%

3 of 1,085 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

CLE - Cleveland

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

CLE on-time profile

Compare the two airports

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

Compare SEA vs CLE

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: Cleveland · fleet on-time rank #4412 of 4927.

What the Data Says About SEA to CLE

The Seattle to Cleveland corridor (SEA to CLE) posts a 75.4% on-time rate on the lower edge of the average band, based on 1,361 tracked flights. Late flights run 44.3 minutes behind on average. 1 carrier cover the 2,021-mile route; over the last 24 months, 8 of 1,085 flights were cancelled (0.7%) and 0.3% diverted.

The monthly split is wide on this route: Aug 2023 posted the strongest performance at 87% on-time, while Aug 2025 came in at just 60% - a 27-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–CLE peaks in January at 83.9% on-time while June carries the heaviest traffic (~55 flights per month) ; the softest month is September at 68.1%, a 15.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to CLE rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to CLE ranks #4248 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 CLE? ▼
Flights from Seattle to Cleveland have a 75.4% on-time rate based on 1,361 flights. The average delay is 44.3 minutes. The best recent month was Aug 2023 with 87% on-time.
What is the cancellation rate for SEA to CLE? ▼
Over the last 24 months, 0.7% of flights on this route were cancelled (8 of 1,085 flights) and 0.3% were diverted.
How far is the flight from SEA to CLE? ▼
The flight distance from Seattle (SEA) to Cleveland (CLE) is approximately 2,021 miles. This route is served by 1 carrier.
When is the best time to fly from SEA to CLE? ▼
The best recent month for on-time performance was Aug 2023 (87% on-time). The worst was Aug 2025 (60% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
CLE Airport

Cleveland
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–CLE data

SEA–CLE is mid-pack at 75.4% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and CLE airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, January (83.9% on-time) beats September (68.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 75.4% 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.