Flight number record
AS 312
Alaska Airlines · Seattle to Omaha
- Route
- SEA → OMA
- Departs
- 09:00
- Flights
- 354
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 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 9 points better than the US average of 77.3%. That gap is worth roughly 88 fewer late arrivals for every thousand flights.
Key figures
On time
86.1%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
45 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
2.5%
National rate is 8.3%
These figures cover 354 flights between September 2025 and August 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.
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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 59 of 354 flights, with 09:03 (59 flights) and 08:55 (52 flights) next.
- Departs 09:0059 flights16.7%
- Departs 09:0359 flights16.7%
- Departs 08:5552 flights14.7%
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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 312 runs 2 points better at 86.1%. 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 312 next to SEA to OMA
Every carrier on SEA to OMA combined arrived on time 84.0% of the time across 505 flights, so AS 312 is 2 points ahead of it. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 312thin sample | 354 | 86.1% | 45 min | 0.00% | A+ |
| All Alaska Airlines on SEA–OMA | 505 | 84.0% | 44 min | 0.20% | B+ |
| All carriers on SEA–OMA | 505 | 84.0% | 44 min | 0.20% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 312 quarter by quarter
Quarter by quarter AS 312 held fairly steady: 90.0% in Jul–Sep 2025, 83.7% in Oct–Dec 2025, 83.5% in Jan–Mar 2026, 91.2% in Apr–Jun 2026 and 83.6% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202592 flights83.7%
- Jan–Mar 202679 flights83.5%
- Apr–Jun 202691 flights91.2%
- Jul–Sep 202662 flights83.6%
Scale runs 75% to 95%.
By weekday, AS 312 did best on Saturday at 93.5% on time and worst on Friday at 80.8%. Each day rests on about 51 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 312 runs when it is late
AS 312 often beats the schedule: 118 of 353 completed flights, 33%, arrived 15 minutes or more early. Most of the lateness is short. 25 of the 49 late arrivals were under half an hour behind, and 9 reached an hour or more.
- 15+ min early118 flights33.4%
- Within 15 min186 flights52.7%
- 15–29 min late25 flights7.1%
- 30–59 min late15 flights4.2%
- 1–2 hours late8 flights2.3%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 353 completed flights by arrival against schedule.
A late pushback is often recovered here: of 53 departures that left 15 minutes late or more, 16 still arrived on time. 12 flights left on time and still arrived late.
The worst days
Worst days for AS 312
The latest arrival of the period was on 13 March 2026, 4 hours 13 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in November 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 March 2026 | 4 hours 13 minutes | Extreme weather |
| 17 November 2025 | 1 hour 53 minutes | National Airspace System |
| 9 November 2025 | 1 hour 51 minutes | Carrier |
| 1 November 2025 | 1 hour 44 minutes | Late-arriving aircraft |
| 15 February 2026 | 1 hour 44 minutes | Carrier |
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 2,194 reported delay minutes.
- 36%Carrier
- 30%National Airspace System
- 24%Late-arriving aircraft
- 10%Extreme weather
The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 798 of the 2,194 delay minutes reported here. The split is drawn from 2,194 delay minutes reported on AS 312.
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 2.5% 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.
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.
AS 312 is not only a SEA to OMA flight. It also flew OMA to SEA (340 flights, 83.8% 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 | 340 | 83.8% | 52 min | 0.29% | 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: 86.1% 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
- Eppley Airfield (OMA) 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.