Flight number record
AS 500
Alaska Airlines · Seattle to Indianapolis
- Route
- SEA → IND
- Departs
- 09:09
- Flights
- 326
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 500, check with Alaska Airlines.
AS 500 lands a B, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 50 minutes on average. That rests on 326 flights, with a median arrival 7 minutes early.
Key figures
On time
80.7%
Arrivals under 15 minutes late, of 321 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
1.23%
National rate is 1.89%
1 hour+ late
5.3%
National rate is 8.3%
These figures cover 326 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 500 flies
AS 500 flies SEA to IND without a single fixed slot. Its most common scheduled departure was 09:09, used on 70 of 326 flights, with 11:45 (33 flights) and 10:43 (33 flights) next.
- Departs 09:0970 flights21.5%
- Departs 11:4533 flights10.1%
- Departs 10:4333 flights10.1%
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 09:09 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 500 runs 3 points worse at 80.7%. 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 500 next to SEA to IND
Every carrier on SEA to IND combined arrived on time 79.6% of the time across 568 flights, so AS 500 is about level with it. Across its whole network Alaska Airlines managed 79.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 500thin sample | 326 | 80.7% | 49 min | 1.23% | B |
| All Alaska Airlines on SEA–IND | 568 | 79.6% | 44 min | 1.23% | B |
| All carriers on SEA–IND | 568 | 79.6% | 44 min | 1.23% | B |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 500 quarter by quarter
AS 500 did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.6% on time and its weakest Jul–Sep 2025 at 63.3%, a swing of 22 points on roughly 65 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 202530 flights63.3%
- Oct–Dec 202590 flights83.9%
- Jan–Mar 202653 flights75.0%
- Apr–Jun 202691 flights85.6%
- Jul–Sep 202662 flights82.3%
Scale runs 55% to 90%.
By weekday, AS 500 did best on Tuesday at 89.4% on time and worst on Friday at 75.6%. Each day rests on about 47 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 500 runs when it is late
AS 500 often beats the schedule: 115 of 321 completed flights, 36%, arrived 15 minutes or more early. The 62 late arrivals split 22 under half an hour, 23 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early115 flights35.8%
- Within 15 min144 flights44.9%
- 15–29 min late22 flights6.9%
- 30–59 min late23 flights7.2%
- 1–2 hours late13 flights4.0%
- 2+ hours late4 flights1.2%
Scale runs 0% to 100%.
Share of 321 completed flights by arrival against schedule.
A late pushback is often recovered here: of 78 departures that left 15 minutes late or more, 33 still arrived on time. In the other direction, 17 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 IND.
The worst days
Worst days for AS 500
The latest arrival of the period was on 8 August 2026, 2 hours 46 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 August 2026 | 2 hours 46 minutes | Carrier |
| 14 June 2026 | 2 hours 39 minutes | Carrier |
| 30 July 2026 | 2 hours 14 minutes | Carrier |
| 24 August 2026 | 2 hours 1 minute | National Airspace System |
| 3 January 2026 | 1 hour 58 minutes | Carrier |
Delay causes
Why AS 500 runs late
Carrier accounts for 56% of the 3,046 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Carrier
- 23%National Airspace System
- 22%Late-arriving aircraft
The largest share of delay minutes, 56%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,692 of the 3,046 delay minutes reported here. The split is drawn from 3,046 delay minutes reported on AS 500.
Cancellations sit at 1.23% against a national 1.89%, which is ordinary. Diversions add another 0.31%.
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 50 minutes, which a normal layover absorbs.
At 1,866 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
AS 500 is not only a SEA to IND flight. It also flew IND to SEA (320 flights, 71.4% 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. 326 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 |
|---|---|---|---|---|---|
| IND to SEAthin sample | 320 | 71.4% | 50 min | 1.56% | C |
What to do with this
Booking AS 500
For a booking, read AS 500 as 80.7% on time with 1.23% cancelled over 326 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Seattle-Tacoma International (SEA) delay statistics
- Indianapolis International (IND) 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.