No delays reported for AS 377 (ATL → SEA) as of 6:51 PM ET. It arrived on time 92% of the time in June-August 2026. When it was late, the average delay was 38 minutes. 1.3% of flights were cancelled. Right now there are no reported delays at ATL, SEA.
May not fly today
Next leg ATL → SEA, scheduled 7:00 AM local time. No delays at ATL right now, and it usually runs on time. This flight number flew about 6 days a week in June-August 2026, so it may not operate today.
Cancellation risk: Low 1.3% of its flights were cancelled in June-August 2026.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Alaska Airlines for official times. Live position: adsb.lol (open data, ODbL).
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| ATL → SEA Atlanta, GA to Seattle, WA | 7:00 AM → 9:26 AM | 92% |
Local times. Schedules change; check your booking.
How reliable is AS 377?
| Arrived on time (within 15 min) | 92% |
| Average delay when late | 38 min |
| Cancelled | 1.3% |
| Diverted | 0% |
| Flights tracked | 76 |
Best and worst days to fly AS 377
AS 377 was most reliable on Tuesdays (100% on time) and least reliable on Thursdays (75%).
| Monday | |
| Tuesday | |
| Wednesday | |
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| Sunday |
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 ATL → 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 377 delayed today?
Right now there are no reported delays at ATL, SEA. Checked 6:51 PM ET. For this flight's gate and exact status, check the Alaska Airlines app.
Is AS 377 usually on time?
AS 377 arrived within 15 minutes of schedule 92% of the time in June-August 2026, with an average delay of 38 minutes when late.
How often is AS 377 cancelled?
1.3% of AS 377 flights were cancelled in June-August 2026.