Route Reliability
Chicago → Seattle
ORD–SEA · 1,721 miles · Chicago O'Hare International Airport to Seattle–Tacoma International Airport
- 70%
- Arrive within 15 minutes
- 15 min
- Average arrival delay
- 1.3%
- Cancelled
- 5,561
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines75%1,540 flights
- 2.Delta Air Lines69%898 flights
- 3.Alaska Airlines68%1,803 flights
- 4.American Airlines66%1,320 flights
What the data says
Morning-you made the right choice.
ORD–SEA flights departing between 6–9 AM arrived on time 79% of the time, versus 51% between 9 PM–12 AM.
Sunday scaries are real for this one.
ORD–SEA flights arrived on time 73% of the time on Tuesdays. On Sundays: 65%.
United Airlines runs this route best.
United Airlines arrived on time 75% of the time on this route; American Airlines managed 66%.
Ticking up lately.
ORD–SEA flights arrived on time 68% of the time over the last three months in the data, compared with 64% 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
- Mon68%(817 flights)
- Tue73%(771 flights)
- Wed72%(768 flights)
- Thu71%(807 flights)
- Fri67%(807 flights)
- Sat71%(687 flights)
- Sun65%(817 flights)
- 6–9 AM79%(1646 flights)
- 9 AM–12 PM72%(817 flights)
- 12–3 PM77%(739 flights)
- 3–6 PM65%(1056 flights)
- 6–9 PM57%(970 flights)
- 9 PM–12 AM51%(246 flights)
Jun 70% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 70% | 567 |
| July 2025 | 67% | 613 |
| August 2025 | 70% | 590 |
| September 2025 | 85% | 506 |
| October 2025 | 75% | 491 |
| November 2025 | 64% | 373 |
| December 2025 | 49% | 374 |
| January 2026 | 66% | 296 |
| February 2026 | 76% | 299 |
| March 2026 | 52% | 345 |
| April 2026 | 77% | 458 |
| May 2026 | 74% | 562 |
Same trip, other airports
Keep nerding
Based on 5,561 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.