Flight number record
AS 704
Alaska Airlines · Seattle to Las Vegas
- Route
- SEA → LAS
- Departs
- 08:25
- Flights
- 271
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 704, check with Alaska Airlines.
AS 704 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 271 flights, with a median arrival 7 minutes early.
Set against the rest of the country, AS 704's record is 7 points better than the US average of 77.3%. That gap is worth roughly 69 fewer late arrivals for every thousand flights.
Key figures
On time
84.2%
Arrivals under 15 minutes late, of 266 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
1.85%
National rate is 1.89%
1 hour+ late
5.3%
National rate is 8.3%
These figures cover 271 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 704 flies
AS 704 flies SEA to LAS without a single fixed slot. Its most common scheduled departure was 08:25, used on 57 of 271 flights, with 20:25 (35 flights) next.
- Departs 08:2557 flights21.0%
- Departs 20:2535 flights12.9%
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 08:25 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 704 runs level with that at 84.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
AS 704 next to SEA to LAS
Every carrier on SEA to LAS combined arrived on time 77.6% of the time across 5,620 flights, so AS 704 is 7 points ahead of it. Alaska flew 2,612 flights on the same city pair under all its flight numbers, including this one, and those ran 78.7% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 704thin sample | 271 | 84.2% | 55 min | 1.85% | B |
| All Alaska Airlines on SEA–LAS | 2,612 | 78.7% | 48 min | 0.84% | B+ |
| All carriers on SEA–LAS | 5,620 | 77.6% | 56 min | 0.93% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 704 quarter by quarter
AS 704 did not run the same all year. Its best quarter was Jan–Mar 2026 at 93.5% on time and its weakest Jul–Sep 2026 at 66.1%, a swing of 27 points on roughly 68 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.
- Oct–Dec 202564 flights90.3%
- Jan–Mar 202663 flights93.5%
- Apr–Jun 202682 flights86.2%
- Jul–Sep 202662 flights66.1%
Scale runs 60% to 100%.
By weekday, AS 704 ranged from 80.5% on Friday to 87.9% on Saturday. With about 39 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late AS 704 runs when it is late
AS 704 often beats the schedule: 93 of 266 completed flights, 35%, arrived 15 minutes or more early. The 42 late arrivals split 12 under half an hour, 16 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early93 flights35.0%
- Within 15 min131 flights49.2%
- 15–29 min late12 flights4.5%
- 30–59 min late16 flights6.0%
- 1–2 hours late11 flights4.1%
- 2+ hours late3 flights1.1%
Scale runs 0% to 100%.
Share of 266 completed flights by arrival against schedule.
10 of 44 late departures made up the time and arrived on time, 23% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for AS 704
The latest arrival of the period was on 18 June 2026, 3 hours 21 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across June, March, October and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 June 2026 | 3 hours 21 minutes | National Airspace System |
| 13 March 2026 | 3 hours 7 minutes | Extreme weather |
| 6 June 2026 | 2 hours 4 minutes | Carrier |
| 19 October 2025 | 1 hour 54 minutes | Carrier |
| 16 July 2026 | 1 hour 44 minutes | Late-arriving aircraft |
Delay causes
Why AS 704 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 2,328 reported delay minutes.
- 40%National Airspace System
- 37%Carrier
- 17%Late-arriving aircraft
- 6%Extreme weather
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 864 of the 2,328 delay minutes reported here. The split is drawn from 2,328 delay minutes reported on AS 704.
Cancellations sit at 1.85% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
5.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 867 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 271 flights under AS 704 in the data flew SEA to LAS. 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. 271 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 704
For a booking, read AS 704 as 84.2% on time with 1.85% cancelled over 271 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to LAS, every carrier and departure
- LAS to SEA, the return direction
- Delta Air Lines 2922 on the same route91.1%
- Delta Air Lines 2905 on the same route82.9%
- Delta Air Lines 2880 on the same route80.1%
- Delta Air Lines 2949 on the same route78.9%
- Alaska Airlines 738 on the same route78.3%
- Alaska Airlines 478 on the same route73.3%
- Seattle-Tacoma International (SEA) delay statistics
- Harry Reid International (LAS) 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
- The best time of day to fly, according to 7.05 million flight records
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.