Likely delayed: there are delays at AS 338's airports as of 6:45 PM ET. It arrived on time 71.9% of the time in June-August 2026. When it was late, the average delay was 50 minutes. 2.2% of flights were cancelled. SFO has major delays (wind, max 5 hours and 41 minutes), so this flight is likely to be delayed.
May not fly today
Leg 3 of 3 (SAN → SFO): Next leg SAN → SFO, scheduled 7:59 PM local time. No delays at SAN right now. This flight number flew about 5 days a week in June-August 2026, so it may not operate today.
Cancellation risk: Medium 2.2% of its flights were cancelled in June-August 2026; SFO has major delays.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Alaska Airlines for official times.
What to do now
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| BOS → SEA Boston, MA to Seattle, WA | 9:00 AM → 12:23 PM | 74% |
| PDX → STL Portland, OR to St. Louis, MO | 10:37 AM → 4:37 PM | 100% |
| SAN → SFO San Diego, CA to San Francisco, CA | 7:59 PM → 9:42 PM | 36% |
Local times. Schedules change; check your booking.
How reliable is AS 338?
| Arrived on time (within 15 min) | 71.9% |
| Average delay when late | 50 min |
| Cancelled | 2.2% |
| Diverted | 0% |
| Flights tracked | 91 |
Best and worst days to fly AS 338
AS 338 was most reliable on Wednesdays (92% on time) and least reliable on Fridays (54%).
| Monday | |
| Tuesday | |
| Wednesday | |
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Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Alaska Airlines to the Department of Transportation.
Other flights BOS → SEA
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Alaska Airlines app.
Alaska Airlines delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is AS 338 delayed today?
SFO has major delays (wind, max 5 hours and 41 minutes), so this flight is likely to be delayed. Checked 6:45 PM ET. For this flight's gate and exact status, check the Alaska Airlines app.
Is AS 338 usually on time?
AS 338 arrived within 15 minutes of schedule 71.9% of the time in June-August 2026, with an average delay of 50 minutes when late.
How often is AS 338 cancelled?
2.2% of AS 338 flights were cancelled in June-August 2026.