Route · IND → SEA · 2020–2025 BTS data
Indianapolis to Seattle
The IND–SEA corridor (Indianapolis, IN → Seattle, WA) runs ahead of the national average, served by 2 carriers across roughly 1,866 miles.
Data updated 2026-06-13
- 79.2%
- On-time
- +0.2 pts
- vs US avg
- 58 min
- Delay when late
- 2,321
- Flights
Cancelled
0.7%
Best Month
Jul 2024 84%
Worst Month
Jun 2024 53%
Distance
1,866 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 41 | 18 | 1 | 0 | AS |
| Nov 2025 | 38 | 9 | 0 | 0 | AS |
| Oct 2025 | 48 | 6 | 2 | 0 | AS |
| Sep 2025 | 51 | 13 | 0 | 0 | AS |
| Aug 2025 | 59 | 21 | 0 | 0 | AS |
| Jul 2025 | 61 | 21 | 0 | 1 | AS |
| Jun 2025 | 60 | 21 | 1 | 0 | AS |
| May 2025 | 62 | 16 | 1 | 0 | AS |
| Apr 2025 | 38 | 10 | 0 | 0 | AS |
| Mar 2025 | 31 | 7 | 0 | 0 | AS |
| Dec 2024 | 45 | 5 | 0 | 0 | AS |
| Nov 2024 | 38 | 5 | 0 | 0 | AS |
| Oct 2024 | 46 | 3 | 1 | 0 | AS |
| Sep 2024 | 55 | 16 | 0 | 0 | AS |
| Aug 2024 | 61 | 19 | 0 | 0 | AS |
| Jul 2024 | 62 | 10 | 1 | 0 | AS |
| Jun 2024 | 60 | 28 | 0 | 0 | AS |
| May 2024 | 55 | 21 | 0 | 0 | AS |
| Apr 2024 | 37 | 12 | 0 | 0 | AS |
| Mar 2024 | 31 | 4 | 1 | 0 | AS |
| Dec 2023 | 31 | 6 | 0 | 0 | AS |
| Nov 2023 | 30 | 2 | 0 | 0 | AS |
| Oct 2023 | 32 | 2 | 0 | 0 | AS |
| Sep 2023 | 60 | 12 | 0 | 0 | AS |
Cancellation Rate
0.7%
8 of 1,132 flights
Diversion Rate
0.1%
1 of 1,132 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IND - Indianapolis
Full on-time, delay-cause, and seasonal performance for Indianapolis, IN.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See IND and SEA side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to IND–SEA.
Routes with a similar on-time rate
What the Data Says About IND to SEA
2,321 tracked flights put the IND to SEA pairing (Indianapolis to Seattle) at a 79.2% on-time rate, squarely in line with the wider network. Delays that do occur run 58.2 minutes on average. Across the 1,866-mile route and its 2 carriers, the trailing 24 months show 0.7% cancelled and 0.1% diverted (1,132 flights sampled).
The monthly split is wide on this route: Jul 2024 posted the strongest performance at 84% on-time, while Jun 2024 came in at just 53% - a 31-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.