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Route Reliability

Seattle → Chicago

SEA–ORD · 1,721 miles · Seattle–Tacoma International Airport to Chicago O'Hare International Airport

76
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
9 min
Average arrival delay
1.2%
Cancelled
5,555
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines80%1,539 flights
  2. 2.Delta Air Lines78%898 flights
  3. 3.Alaska Airlines73%1,798 flights
  4. 4.American Airlines72%1,320 flights

What the data says

Morning-you made the right choice.

SEA–ORD flights departing between 6–9 AM arrived on time 86% of the time, versus 63% between 12–3 PM.

Sunday scaries are real for this one.

SEA–ORD flights arrived on time 82% of the time on Tuesdays. On Sundays: 71%.

United Airlines runs this route best.

United Airlines arrived on time 80% of the time on this route; American Airlines managed 72%.

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%(803 flights)
  • Tue82%(777 flights)
  • Wed80%(767 flights)
  • Thu75%(794 flights)
  • Fri74%(801 flights)
  • Sat78%(692 flights)
  • Sun71%(810 flights)
On-time by departure window
  • 12–3 AM81%(402 flights)
  • 6–9 AM86%(1408 flights)
  • 9 AM–12 PM70%(1143 flights)
  • 12–3 PM63%(822 flights)
  • 3–6 PM76%(1133 flights)
  • 6–9 PM75%(55 flights)
  • 9 PM–12 AM77%(481 flights)
On-time trend by month
82%
May

Jun 72% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%565
July 202567%607
August 202562%580
September 202582%508
October 202583%491
November 202575%372
December 202571%375
January 202674%296
February 202693%297
March 202680%342
April 202681%454
May 202682%557

Same trip, other airports

Keep nerding

Based on 5,555 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.