Route
SEA → SFO
Seattle–Tacoma International Airport San Francisco International Airport
Alerts at SEA and SFO
How punctual is this route?
- On-time arrivals
- 59.8%
- Less than 15 minutes late
- Cancelled
- 1.1%
- Of scheduled flights
- Average delay when late
- 60 min
- Flights arriving 15+ minutes late
- Flights tracked
- 6,817
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 58%
- Airline (crew, maintenance, cleaning) 21%
- Late-arriving aircraft 18%
- Extreme weather 4%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 75.2% | 584 |
| October 2025 | 73.0% | 584 |
| November 2025 | 72.2% | 567 |
| December 2025 | 66.1% | 558 |
| January 2026 | 76.2% | 486 |
| February 2026 | 74.3% | 480 |
| March 2026 | 81.7% | 528 |
| April 2026 | 48.5% | 495 |
| May 2026 | 40.7% | 591 |
| June 2026 | 39.2% | 633 |
| July 2026 | 35.0% | 666 |
| August 2026 | 48.6% | 645 |
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 | 2,727 | 56.0% | 1.1% | 55 min |
| United Airlines | 2,062 | 59.1% | 0.8% | 69 min |
| SkyWest Airlines | 1,039 | 69.9% | 1.1% | 56 min |
| Delta Air Lines | 985 | 60.5% | 1.7% | 58 min |
| Southwest Airlines | 4 | 100.0% | 0.0% | — |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA737
46% late · 362 flights
-
DL1412
40% late · 346 flights
-
DL2635
30% late · 340 flights
-
OO3707
31% late · 325 flights
-
AS655
33% late · 305 flights
-
AS725
49% late · 299 flights
-
OO3991
40% late · 296 flights
-
AS680
35% late · 280 flights
-
AS1385
32% late · 263 flights
-
UA1482
34% late · 256 flights
-
AS528
50% late · 250 flights
-
AS688
48% late · 222 flights
-
AS590
48% late · 211 flights
-
OO5676
13% late · 142 flights
-
UA2866
44% late · 116 flights
-
UA2640
19% late · 108 flights
-
UA2482
13% late · 106 flights
-
UA2831
70% late · 103 flights
-
AS411
40% late · 101 flights
-
UA499
48% late · 93 flights
-
UA325
18% late · 88 flights
-
DL2870
68% late · 86 flights
-
AS619
67% late · 82 flights
-
AS628
78% late · 81 flights
Reviews
No reviews yet. Be the first to review this route.