Route
SJC → SEA
Mineta San Jose International Airport Seattle–Tacoma International Airport
How punctual is this route?
- On-time arrivals
- 82.7%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 58 min
- Flights arriving 15+ minutes late
- Flights tracked
- 4,422
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 37%
- Late-arriving aircraft 31%
- Air traffic control & airport 25%
- Extreme weather 7%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 83.1% | 367 |
| October 2025 | 85.0% | 392 |
| November 2025 | 84.4% | 373 |
| December 2025 | 79.7% | 354 |
| January 2026 | 87.9% | 332 |
| February 2026 | 92.9% | 339 |
| March 2026 | 86.0% | 328 |
| April 2026 | 86.6% | 306 |
| May 2026 | 82.0% | 356 |
| June 2026 | 76.8% | 401 |
| July 2026 | 79.4% | 438 |
| August 2026 | 73.2% | 436 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 1,884 | 80.7% | 1.3% | 56 min |
| SkyWest Airlines | 1,627 | 88.7% | 0.2% | 69 min |
| Southwest Airlines | 904 | 75.6% | 0.0% | 51 min |
| Delta Air Lines | 4 | 100.0% | 0.0% | — |
| American Airlines | 2 | 100.0% | 0.0% | — |
| United Airlines | 1 | 100.0% | 0.0% | — |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
OO4041
5% late · 349 flights
-
AS1311
10% late · 305 flights
-
OO3736
8% late · 252 flights
-
AS745
18% late · 229 flights
-
OO4100
13% late · 199 flights
-
OO3789
18% late · 192 flights
-
AS523
15% late · 177 flights
-
AS762
20% late · 173 flights
-
AS1304
21% late · 152 flights
-
AS1314
14% late · 123 flights
-
OO3897
14% late · 117 flights
-
OO3602
21% late · 110 flights
-
OO3559
9% late · 108 flights
-
OO3840
8% late · 92 flights
-
AS481
49% late · 71 flights
-
AS1426
61% late · 70 flights
-
AS521
25% late · 70 flights
-
WN3705
34% late · 61 flights
-
AS583
11% late · 57 flights
-
OO3999
24% late · 54 flights
-
AS1413
27% late · 50 flights
-
AS1175
18% late · 49 flights
-
AS1193
20% late · 47 flights
-
WN4982
25% late · 44 flights
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