Route · SEA → GTF · 2020–2025 BTS data
Seattle to Great Falls
The SEA–GTF corridor (Seattle, WA → Great Falls, MT) runs ahead of the national average, served by 2 carriers across roughly 512 miles.
Data updated 2026-06-13
- 87.8%
- On-time
- +8.8 pts
- vs US avg
- 57 min
- Delay when late
- 1,214
- Flights
Cancelled
0.1%
Best Month
Sep 2021 92%
Worst Month
Sep 2021 92%
Distance
512 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Sep 2025 | 30 | 5 | 0 | 0 | OO |
| Mar 2025 | 31 | 0 | 0 | 0 | OO |
| Apr 2024 | 30 | 3 | 0 | 0 | OO |
| Mar 2024 | 31 | 3 | 0 | 0 | OO |
| Oct 2023 | 31 | 2 | 0 | 0 | OO |
| Sep 2023 | 30 | 7 | 0 | 0 | OO |
| Aug 2023 | 31 | 5 | 0 | 0 | OO |
| Jul 2023 | 31 | 2 | 0 | 0 | OO |
| Jun 2023 | 30 | 0 | 0 | 0 | OO |
| May 2023 | 31 | 3 | 0 | 0 | OO |
| Apr 2023 | 30 | 2 | 0 | 0 | OO |
| Dec 2022 | 31 | 12 | 0 | 0 | QX |
| Oct 2022 | 31 | 5 | 0 | 0 | QX |
| Sep 2022 | 30 | 10 | 0 | 0 | QX |
| Aug 2022 | 31 | 4 | 0 | 0 | QX |
| Jul 2022 | 31 | 3 | 0 | 0 | QX |
| Jun 2022 | 30 | 5 | 0 | 0 | QX |
| May 2022 | 31 | 6 | 0 | 0 | QX |
| Apr 2022 | 30 | 3 | 1 | 0 | QX |
| Mar 2022 | 31 | 2 | 0 | 1 | QX |
| Jan 2022 | 31 | 8 | 0 | 0 | QX |
| Nov 2021 | 30 | 3 | 0 | 0 | QX |
| Oct 2021 | 36 | 4 | 0 | 0 | QX |
| Sep 2021 | 60 | 5 | 0 | 0 | QX |
Cancellation Rate
0.1%
1 of 769 flights
Diversion Rate
0.1%
1 of 769 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 →GTF - Great Falls
Full on-time, delay-cause, and seasonal performance for Great Falls, MT.
Destination airport →Compare the two airports
See SEA and GTF 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–GTF.
Routes with a similar on-time rate
Routes of a similar trip length
What the Data Says About SEA to GTF
Seattle to Great Falls (SEA to GTF) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.8% on-time rate across 1,214 flights, with delays that do happen averaging 57.0 minutes. The corridor runs roughly 512 miles and is served by 2 carriers. Over the most recent 24 months, 1 of 769 flights were cancelled (0.1%) and 1 diverted (0.1%).
Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.
Frequently Asked Questions
How often are flights delayed from SEA to GTF? ▼
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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.