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Route Reliability

Cincinnati → Seattle

CVG–SEA · 1,965 miles · Cincinnati/Northern Kentucky International Airport to Seattle–Tacoma International Airport

78
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
9 min
Average arrival delay
1.1%
Cancelled
791
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines85%362 flights
  2. 2.Alaska Airlines65%429 flights

What the data says

Morning flights do better here.

CVG–SEA flights departing between 6–9 AM arrived on time 78% of the time, versus 67% between 6–9 PM.

Sunday scaries are real for this one.

CVG–SEA flights arrived on time 82% of the time on Wednesdays and just 67% on Sundays. That gap is worth planning around.

Delta Air Lines has a clear lead on this route.

Delta Air Lines arrived on time 85% of the time on this route; Alaska Airlines managed 65%.

Trending in the right direction.

CVG–SEA flights arrived on time 76% of the time over the last three months in the data, compared with 59% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon72%(112 flights)
  • Tue76%(114 flights)
  • Wed82%(111 flights)
  • Thu70%(110 flights)
  • Fri72%(112 flights)
  • Sat79%(109 flights)
  • Sun67%(114 flights)
On-time by departure window
  • 6–9 AM78%(494 flights)
  • 6–9 PM67%(288 flights)
On-time trend by month
90%
May

Jun 70% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%79
July 202576%91
August 202573%81
September 202595%60
October 202585%60
November 202584%57
December 202542%59
January 202675%59
February 202659%56
March 202656%59
April 202683%60
May 202690%61

Keep nerding

Based on 791 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.