Route Reliability
Seattle → Sacramento
SEA–SMF · 605 miles · Seattle–Tacoma International Airport to Sacramento International Airport
- 82%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 0.5%
- Cancelled
- 4,602
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines91%1,620 flights
- 2.Alaska Airlines80%1,812 flights
- 3.Southwest Airlines72%1,170 flights
What the data says
Morning flights do better here.
SEA–SMF flights departing between 3–6 AM arrived on time 97% of the time, versus 70% between 9 PM–12 AM.
Tuesday comes out ahead.
A small edge: 85% on time on Tuesdays against 78% on Thursdays.
Delta Air Lines has a clear lead on this route.
Delta Air Lines arrived on time 91% of the time on this route; Southwest Airlines managed 72%.
Ticking up lately.
SEA–SMF flights arrived on time 85% of the time over the last three months in the data, compared with 82% 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
- Mon83%(697 flights)
- Tue85%(639 flights)
- Wed84%(639 flights)
- Thu78%(691 flights)
- Fri79%(691 flights)
- Sat83%(530 flights)
- Sun80%(682 flights)
- 3–6 AM97%(158 flights)
- 6–9 AM93%(757 flights)
- 9 AM–12 PM83%(929 flights)
- 12–3 PM83%(697 flights)
- 3–6 PM77%(733 flights)
- 6–9 PM76%(885 flights)
- 9 PM–12 AM70%(410 flights)
Jun 74% → May 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 441 |
| July 2025 | 74% | 452 |
| August 2025 | 79% | 426 |
| September 2025 | 85% | 397 |
| October 2025 | 86% | 400 |
| November 2025 | 85% | 372 |
| December 2025 | 75% | 340 |
| January 2026 | 85% | 313 |
| February 2026 | 85% | 302 |
| March 2026 | 83% | 361 |
| April 2026 | 88% | 369 |
| May 2026 | 86% | 396 |
Keep nerding
Based on 4,602 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.