Flight number record
AS 334
Alaska Airlines · Seattle to Atlanta
- Route
- SEA → ATL
- Departs
- 09:05
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 334, check with Alaska Airlines.
AS 334 lands a B+, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That rests on 365 flights, with a median arrival 6 minutes early.
Key figures
On time
80.6%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
44 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
3.6%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 6 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When AS 334 flies
AS 334 flies SEA to ATL without a single fixed slot. Its most common scheduled departure was 09:05, used on 70 of 365 flights.
- Departs 09:0570 flights19.2%
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 09:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 334 runs 3 points worse at 80.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
AS 334 next to SEA to ATL
Every carrier on SEA to ATL combined arrived on time 84.0% of the time across 3,294 flights, so AS 334 is 3 points behind it. Alaska flew 892 flights on the same city pair under all its flight numbers, including this one, and those ran 83.2% on time. Across its whole network Alaska Airlines managed 79.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 334 | 365 | 80.6% | 44 min | 0.27% | B+ |
| All Alaska Airlines on SEA–ATL | 892 | 83.2% | 49 min | 0.56% | B+ |
| All carriers on SEA–ATL | 3,294 | 84.0% | 74 min | 0.70% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 334 quarter by quarter
AS 334 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 60.7%, a swing of 36 points on roughly 73 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 flights96.7%
- Oct–Dec 202592 flights75.8%
- Jan–Mar 202690 flights91.1%
- Apr–Jun 202691 flights83.1%
- Jul–Sep 202662 flights60.7%
Scale runs 50% to 100%.
By weekday, AS 334 did best on Wednesday at 90.0% on time and worst on Friday at 70.6%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 334 runs when it is late
AS 334 often beats the schedule: 119 of 361 completed flights, 33%, arrived 15 minutes or more early. The 70 late arrivals split 34 under half an hour, 23 between 30 and 60 minutes, and 13 an hour or more.
- 15+ min early119 flights33.0%
- Within 15 min172 flights47.6%
- 15–29 min late34 flights9.4%
- 30–59 min late23 flights6.4%
- 1–2 hours late8 flights2.2%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
A late pushback is often recovered here: of 73 departures that left 15 minutes late or more, 29 still arrived on time. In the other direction, 26 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ATL.
The worst days
Worst days for AS 334
The latest arrival of the period was on 7 June 2026, 2 hours 46 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 June 2026 | 2 hours 46 minutes | Carrier |
| 5 December 2025 | 2 hours 33 minutes | Late-arriving aircraft |
| 24 August 2026 | 2 hours 27 minutes | Carrier |
| 18 November 2025 | 2 hours 25 minutes | Late-arriving aircraft |
| 8 October 2025 | 2 hours 3 minutes | Carrier |
Delay causes
Why AS 334 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,075 reported delay minutes.
- 42%Carrier
- 36%National Airspace System
- 20%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,279 of the 3,075 delay minutes reported here. The split is drawn from 3,075 delay minutes reported on AS 334.
Cancellations are rare at 0.27%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is 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 3.6% 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 2,182 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.
Every one of the 365 flights under AS 334 in the data flew SEA to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 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 334
For a booking, read AS 334 as 80.6% on time with 0.27% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to ATL, every carrier and departure
- ATL to SEA, the return direction
- Delta Air Lines 562 on the same route82.4%
- Delta Air Lines 569 on the same route94.8%
- Delta Air Lines 542 on the same route79.3%
- Delta Air Lines 560 on the same route84.6%
- Delta Air Lines 652 on the same route89.0%
- Delta Air Lines 554 on the same route77.4%
- Seattle-Tacoma International (SEA) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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
- Worst months to fly in the US, ranked by the data
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.