Flight number record
AS 312
Alaska Airlines · Seattle to Omaha
- Route
- SEA → OMA
- Departs
- 09:00
- Flights
- 354
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s AS 312, check with Alaska Airlines.
AS 312 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 354 flights, with a median arrival 8 minutes early.
Set against the rest of the country, AS 312's record is 8 points better than the US average of 77.6%. That gap is worth roughly 77 fewer late arrivals for every thousand flights.
Key figures
On time
85.3%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
47 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
2.8%
National rate is 8.1%
These figures cover 354 flights between July 2025 and June 2026. The median arrival is 8 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.
Schedule
When AS 312 flies
AS 312 flies SEA to OMA without a single fixed slot. Its most common scheduled departure was 09:00, used on 64 of 354 flights, with 08:55 (52 flights) and 09:06 (50 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 09:0064 flights18.1%
- Departs 08:5552 flights14.7%
- Departs 09:0650 flights14.1%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and AS 312 runs level with that at 85.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
AS 312 next to SEA to OMA
Every carrier on SEA to OMA combined arrived on time 81.7% of the time across 511 flights, so AS 312 is 4 points ahead of it. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 312thin sample | 354 | 85.3% | 47 min | 0.00% | A+ |
| All Alaska Airlines on SEA–OMA | 511 | 81.7% | 47 min | 0.00% | B+ |
| All carriers on SEA–OMA | 511 | 81.7% | 47 min | 0.00% | B+ |
| Alaska Airlines, whole network | 293,372 | 79.1% | 52 min | 1.28% | B |
Across the year
AS 312 quarter by quarter
Quarter by quarter AS 312 held fairly steady: 82.6% in Jul–Sep 2025, 83.7% in Oct–Dec 2025, 83.5% in Jan–Mar 2026 and 91.2% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202592 flights82.6%
- Oct–Dec 202592 flights83.7%
- Jan–Mar 202679 flights83.5%
- Apr–Jun 202691 flights91.2%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, AS 312 ranged from 80.8% on Sunday to 92.2% on Wednesday. With about 51 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why AS 312 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 2,438 reported delay minutes.
- 40%Carrier
- 26%Late-arriving aircraft
- 25%National Airspace System
- 9%Extreme weather
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 973 of the 2,438 delay minutes reported here. The split is drawn from 2,438 delay minutes reported on AS 312.
Cancellations are rare at 0.00%, below the national 1.81% 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 2.8% land an hour or more behind schedule, against 8.1% 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.
The 1,368 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
AS 312 is not only a SEA to OMA flight. It also flew OMA to SEA (346 flights, 80.9% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 354 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OMA to SEAthin sample | 346 | 80.9% | 50 min | 0.00% | B+ |
What to do with this
Booking AS 312
For a booking, AS 312 has one of the better records a US domestic flight can show: 85.3% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- 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
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.