Flight number record
AS 555
Alaska Airlines · Seattle to Minneapolis
- Route
- SEA → MSP
- Departs
- 08:26
- Flights
- 330
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 555, check with Alaska Airlines.
AS 555 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 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 330 flights, with a median arrival 5 minutes early.
Set against the rest of the country, AS 555's record is 8 points better than the US average of 77.3%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.
Key figures
On time
85.2%
Arrivals under 15 minutes late, of 324 completed flights
Avg delay
40 min
Across delayed arrivals only, not all flights
Cancelled
1.21%
National rate is 1.89%
1 hour+ late
1.9%
National rate is 8.3%
These figures cover 330 flights between September 2025 and August 2026. The median arrival is 5 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 555 flies
AS 555 flies SEA to MSP without a single fixed slot. Its most common scheduled departure was 08:26, used on 57 of 330 flights, with 08:35 (52 flights) and 08:30 (46 flights) next.
- Departs 08:2657 flights17.3%
- Departs 08:3552 flights15.8%
- Departs 08:3046 flights13.9%
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 08:26 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 555 runs level with that at 85.2%. 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 555 next to SEA to MSP
Every carrier on SEA to MSP combined arrived on time 87.2% of the time across 2,676 flights, so AS 555 is 2 points behind it. Alaska flew 931 flights on the same city pair under all its flight numbers, including this one, and those ran 83.9% on time. 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 555thin sample | 330 | 85.2% | 40 min | 1.21% | A |
| All Alaska Airlines on SEA–MSP | 931 | 83.9% | 45 min | 0.86% | B+ |
| All carriers on SEA–MSP | 2,676 | 87.2% | 64 min | 0.78% | A+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 555 quarter by quarter
Quarter by quarter AS 555 held fairly steady: 82.4% in Oct–Dec 2025, 90.5% in Jan–Mar 2026, 89.9% in Apr–Jun 2026 and 88.5% 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 flights—
- Oct–Dec 202592 flights82.4%
- Jan–Mar 202676 flights90.5%
- Apr–Jun 202670 flights89.9%
- Jul–Sep 202662 flights88.5%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, AS 555 did best on Thursday at 91.3% on time and worst on Friday at 75.6%. Each day rests on about 47 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 555 runs when it is late
AS 555 often beats the schedule: 83 of 324 completed flights, 26%, arrived 15 minutes or more early. Most of the lateness is short. 32 of the 48 late arrivals were under half an hour behind, and 6 reached an hour or more.
- 15+ min early83 flights25.6%
- Within 15 min193 flights59.6%
- 15–29 min late32 flights9.9%
- 30–59 min late10 flights3.1%
- 1–2 hours late4 flights1.2%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 324 completed flights by arrival against schedule.
A late pushback is often recovered here: of 38 departures that left 15 minutes late or more, 16 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 MSP.
The worst days
Worst days for AS 555
The latest arrival of the period was on 26 September 2025, 4 hours 38 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 September 2025 | 4 hours 38 minutes | Carrier |
| 7 September 2025 | 3 hours 29 minutes | Carrier |
| 29 November 2025 | 1 hour 59 minutes | Carrier |
| 7 December 2025 | 1 hour 46 minutes | Carrier |
| 9 June 2026 | 1 hour 18 minutes | Carrier |
Delay causes
Why AS 555 runs late
Carrier accounts for 56% of the 1,900 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Carrier
- 39%National Airspace System
- 5%Late-arriving aircraft
39% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 740 minutes out of 1,900, against a national NAS share of 21%. The split is drawn from 1,900 delay minutes reported on AS 555.
Cancellations sit at 1.21% against a national 1.89%, which is ordinary. Diversions add another 0.61%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.9% 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 1,399 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 555 is not only a SEA to MSP flight. It also flew MSP to SEA (292 flights, 77.3% 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. 330 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 |
|---|---|---|---|---|---|
| MSP to SEAthin sample | 292 | 77.3% | 56 min | 0.34% | B+ |
What to do with this
Booking AS 555
For a booking, AS 555 has one of the better records a US domestic flight can show: 85.2% on time and 1.21% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SEA to MSP, every carrier and departure
- MSP to SEA, the return direction
- Delta Air Lines 943 on the same route96.4%
- Delta Air Lines 536 on the same route90.6%
- Delta Air Lines 949 on the same route81.5%
- Alaska Airlines 386 on the same route83.8%
- Delta Air Lines 941 on the same route88.9%
- Delta Air Lines 953 on the same route90.9%
- Seattle-Tacoma International (SEA) delay statistics
- Minneapolis-St Paul International (MSP) 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.