Flight number record
AS 601
Alaska Airlines · Reno to Seattle
- Route
- RNO → SEA
- Departs
- 14:46
- Flights
- 343
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 601, check with Alaska Airlines.
AS 601 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.3%. The late ones land roughly 55 minutes behind schedule. That rests on 343 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so AS 601 runs 6 points behind the country as a whole. Across a thousand flights that is about 56 extra late arrivals.
Key figures
On time
71.7%
Arrivals under 15 minutes late, of 339 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
1.17%
National rate is 1.89%
1 hour+ late
8.3%
National rate is 8.3%
These figures cover 343 flights between September 2025 and August 2026. Beyond the headline rate, 8.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When AS 601 flies
AS 601 flies RNO to SEA without a single fixed slot. Its most common scheduled departure was 14:46, used on 70 of 343 flights, with 12:44 (35 flights) next.
- Departs 14:4670 flights20.4%
- Departs 12:4435 flights10.2%
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 14:46 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and AS 601 runs level with that at 71.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
AS 601 next to RNO to SEA
Every carrier on RNO to SEA combined arrived on time 76.7% of the time across 905 flights, so AS 601 is 5 points behind it. Alaska flew 793 flights on the same city pair under all its flight numbers, including this one, and those ran 78.0% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 601thin sample | 343 | 71.7% | 53 min | 1.17% | C |
| All Alaska Airlines on RNO–SEA | 793 | 78.0% | 49 min | 1.13% | B |
| All carriers on RNO–SEA | 905 | 76.7% | 49 min | 0.99% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 601 quarter by quarter
AS 601 did not run the same all year. Its best quarter was Apr–Jun 2026 at 83.5% on time and its weakest Jul–Sep 2026 at 64.5%, a swing of 19 points on roughly 86 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 202526 flights—
- Oct–Dec 202590 flights66.3%
- Jan–Mar 202674 flights69.0%
- Apr–Jun 202691 flights83.5%
- Jul–Sep 202662 flights64.5%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, AS 601 did best on Wednesday at 87.0% on time and worst on Monday at 60.4%. Each day rests on about 49 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 601 runs when it is late
The 96 late arrivals split 36 under half an hour, 32 between 30 and 60 minutes, and 28 an hour or more.
- 15+ min early77 flights22.7%
- Within 15 min166 flights49.0%
- 15–29 min late36 flights10.6%
- 30–59 min late32 flights9.4%
- 1–2 hours late19 flights5.6%
- 2+ hours late9 flights2.7%
Scale runs 0% to 100%.
Share of 339 completed flights by arrival against schedule.
23 of 108 late departures made up the time and arrived on time, 21% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for AS 601
The latest arrival of the period was on 20 December 2025, 4 hours 2 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 December 2025 | 4 hours 2 minutes | Late-arriving aircraft |
| 5 January 2026 | 3 hours 49 minutes | Late-arriving aircraft |
| 7 September 2025 | 3 hours 20 minutes | Carrier |
| 28 December 2025 | 2 hours 17 minutes | Late-arriving aircraft |
| 17 November 2025 | 2 hours 10 minutes | Late-arriving aircraft |
Delay causes
Why AS 601 runs late
Late-arriving aircraft accounts for 60% of the 5,081 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Late-arriving aircraft
- 21%Carrier
- 12%National Airspace System
- 7%Extreme weather
- 0%Security
60% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,081 reported delay minutes here, that single category outweighs weather by 8 to one. The split is drawn from 5,081 delay minutes reported on AS 601.
Cancellations sit at 1.17% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.3% 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 roughly 55 minutes, which a normal layover absorbs.
The 564 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 343 flights under AS 601 in the data flew RNO to SEA. 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. 343 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 601
For a booking, AS 601 is one of the weaker ways to fly RNO to SEA: 5 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- RNO to SEA, every carrier and departure
- SEA to RNO, the return direction
- Seattle-Tacoma International (SEA) 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.