Route · SEA → IND · 2020–2025 BTS data
Seattle to Indianapolis
The SEA–IND corridor (Seattle, WA → Indianapolis, IN) runs behind the national average, served by 2 carriers across roughly 1,866 miles.
Data updated 2026-06-13
- 76.8%
- On-time
- -2.2 pts
- vs US avg
- 48 min
- Delay when late
- 2,324
- Flights
Cancelled
0.4%
Best Month
Aug 2024 80%
Worst Month
Jul 2025 52%
Distance
1,866 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 41 | 13 | 0 | 0 | AS |
| Nov 2025 | 39 | 5 | 0 | 0 | AS |
| Oct 2025 | 48 | 5 | 3 | 1 | AS |
| Sep 2025 | 51 | 15 | 0 | 0 | AS |
| Aug 2025 | 59 | 27 | 0 | 0 | AS |
| Jul 2025 | 61 | 29 | 0 | 1 | AS |
| Jun 2025 | 60 | 21 | 1 | 0 | AS |
| May 2025 | 62 | 25 | 0 | 0 | AS |
| Apr 2025 | 39 | 10 | 0 | 1 | AS |
| Mar 2025 | 31 | 7 | 0 | 0 | AS |
| Dec 2024 | 45 | 11 | 0 | 0 | AS |
| Nov 2024 | 39 | 1 | 0 | 0 | AS |
| Oct 2024 | 45 | 5 | 0 | 0 | AS |
| Sep 2024 | 56 | 20 | 0 | 0 | AS |
| Aug 2024 | 60 | 12 | 1 | 0 | AS |
| Jul 2024 | 62 | 17 | 0 | 0 | AS |
| Jun 2024 | 60 | 19 | 0 | 0 | AS |
| May 2024 | 55 | 18 | 0 | 0 | AS |
| Apr 2024 | 38 | 10 | 0 | 0 | AS |
| Mar 2024 | 31 | 9 | 0 | 1 | AS |
| Dec 2023 | 31 | 6 | 0 | 0 | AS |
| Nov 2023 | 30 | 1 | 0 | 0 | AS |
| Oct 2023 | 31 | 5 | 0 | 0 | AS |
| Sep 2023 | 60 | 18 | 0 | 0 | AS |
Cancellation Rate
0.4%
5 of 1,134 flights
Diversion Rate
0.4%
4 of 1,134 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Origin airport →IND - Indianapolis
Full on-time, delay-cause, and seasonal performance for Indianapolis, IN.
Destination airport →Compare the two airports
See SEA and IND side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SEA–IND.
Routes with a similar on-time rate
What the Data Says About SEA to IND
The Seattle to Indianapolis corridor (SEA to IND) posts a 76.8% on-time rate on the lower edge of the average band, based on 2,324 tracked flights. Late flights run 47.7 minutes behind on average. 2 carriers cover the 1,866-mile route; over the last 24 months, 5 of 1,134 flights were cancelled (0.4%) and 0.4% diverted.
The monthly split is wide on this route: Aug 2024 posted the strongest performance at 80% on-time, while Jul 2025 came in at just 52% - a 28-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.