Flight number record
AS 367
Alaska Airlines · Seattle to Washington
- Route
- SEA → IAD
- Departs
- 22:43
- Flights
- 284
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 367, check with Alaska Airlines.
AS 367 lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 40 minutes on average. That rests on 284 flights, with a median arrival 7 minutes early.
Set against the rest of the country, AS 367's record is 6 points better than the US average of 77.3%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.
Key figures
On time
83.0%
Arrivals under 15 minutes late, of 283 completed flights
Avg delay
38 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
1.8%
National rate is 8.3%
These figures cover 284 flights between September 2025 and August 2026. The median arrival is 7 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When AS 367 flies
AS 367 flies SEA to IAD without a single fixed slot. Its most common scheduled departure was 22:43, used on 69 of 284 flights, with 23:30 (61 flights) and 21:40 (35 flights) next.
- Departs 22:4369 flights24.3%
- Departs 23:3061 flights21.5%
- Departs 21:4035 flights12.3%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 22:43 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and AS 367 runs 13 points better at 83.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
AS 367 next to SEA to IAD
Every carrier on SEA to IAD combined arrived on time 84.8% of the time across 1,822 flights, so AS 367 is 2 points behind it. Alaska flew 835 flights on the same city pair under all its flight numbers, including this one, and those ran 83.3% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 367thin sample | 284 | 83.0% | 38 min | 0.00% | B+ |
| All Alaska Airlines on SEA–IAD | 835 | 83.3% | 38 min | 0.36% | B+ |
| All carriers on SEA–IAD | 1,822 | 84.8% | 58 min | 0.60% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 367 quarter by quarter
AS 367 did not run the same all year. Its best quarter was Oct–Dec 2025 at 87.0% on time and its weakest Jul–Sep 2026 at 77.0%, a swing of 10 points on roughly 57 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights86.7%
- Oct–Dec 202569 flights87.0%
- Jan–Mar 202639 flights84.6%
- Apr–Jun 202685 flights82.1%
- Jul–Sep 202661 flights77.0%
Scale runs 70% to 90%.
By weekday, AS 367 did best on Wednesday at 91.4% on time and worst on Sunday at 76.1%. Each day rests on about 41 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 367 runs when it is late
AS 367 often beats the schedule: 100 of 283 completed flights, 35%, arrived 15 minutes or more early. Most of the lateness is short. 25 of the 48 late arrivals were under half an hour behind, and 5 reached an hour or more.
- 15+ min early100 flights35.3%
- Within 15 min135 flights47.7%
- 15–29 min late25 flights8.8%
- 30–59 min late18 flights6.4%
- 1–2 hours late4 flights1.4%
- 2+ hours late1 flights0.4%
Scale runs 0% to 100%.
Share of 283 completed flights by arrival against schedule.
A late pushback is often recovered here: of 85 departures that left 15 minutes late or more, 41 still arrived on time. Only 4 left on time and still arrived late.
The worst days
Worst days for AS 367
The latest arrival of the period was on 4 November 2025, 2 hours 6 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 November 2025 | 2 hours 6 minutes | Carrier |
| 23 October 2025 | 1 hour 52 minutes | Carrier |
| 16 June 2026 | 1 hour 42 minutes | Carrier |
| 17 November 2025 | 1 hour 29 minutes | Carrier |
| 22 February 2026 | 1 hour 20 minutes | Late-arriving aircraft |
Delay causes
Why AS 367 runs late
Carrier accounts for 48% of the 1,824 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 44%Late-arriving aircraft
- 6%National Airspace System
- 1%Security
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,824 reported delay minutes here, that single category outweighs weather by 44 to one. The split is drawn from 1,824 delay minutes reported on AS 367.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.8% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 2,305 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on one other city pair in the data, including GEG to SEA (1), but none flew often enough under AS 367 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to IAD only.
One caution: this is a thin sample. 284 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking AS 367
For a booking, read AS 367 as 83.0% on time with 0.00% cancelled over 284 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to IAD, every carrier and departure
- IAD to SEA, the return direction
- Delta Air Lines 541 on the same route76.5%
- Seattle-Tacoma International (SEA) delay statistics
- Washington Dulles International (IAD) delay statistics
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Alaska Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.