Route · GEG → BOI · 2020–2025 BTS data
Spokane to Boise
The GEG–BOI corridor (Spokane, WA → Boise, ID) runs ahead of the national average, served by 6 carriers across roughly 287 miles.
Data updated 2026-06-13
- 87.6%
- On-time
- +8.6 pts
- vs US avg
- 68 min
- Delay when late
- 2,947
- Flights
Cancelled
0.3%
Best Month
Oct 2022 95%
Worst Month
Dec 2022 62%
Distance
287 mi
Carriers
6
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 4 | 0 | 0 | OO |
| Oct 2025 | 31 | 3 | 0 | 0 | OO |
| Sep 2025 | 30 | 3 | 0 | 0 | OO |
| Aug 2025 | 31 | 2 | 0 | 0 | OO |
| Jul 2025 | 31 | 6 | 0 | 0 | OO |
| Jun 2025 | 30 | 3 | 0 | 0 | OO |
| May 2025 | 39 | 4 | 0 | 0 | OO |
| Dec 2024 | 50 | 10 | 0 | 0 | OO |
| Nov 2024 | 78 | 6 | 0 | 0 | OO |
| Sep 2024 | 105 | 15 | 1 | 0 | OO |
| Aug 2024 | 112 | 17 | 0 | 0 | OO |
| Jul 2024 | 111 | 12 | 0 | 0 | OO |
| Jun 2024 | 91 | 13 | 0 | 0 | OO |
| May 2024 | 92 | 9 | 0 | 0 | OO |
| Apr 2024 | 104 | 6 | 0 | 0 | OO |
| Mar 2024 | 49 | 2 | 0 | 0 | OO |
| Oct 2023 | 49 | 4 | 0 | 0 | OO |
| Sep 2023 | 74 | 4 | 0 | 0 | OO |
| Dec 2022 | 69 | 26 | 0 | 1 | OO,QX |
| Nov 2022 | 59 | 9 | 0 | 0 | OO,QX |
| Oct 2022 | 58 | 3 | 0 | 0 | OO,QX |
| Sep 2022 | 72 | 8 | 0 | 0 | QX |
| Aug 2022 | 87 | 7 | 0 | 0 | QX |
| Jul 2022 | 90 | 9 | 3 | 0 | QX |
Cancellation Rate
0.3%
4 of 1,573 flights
Diversion Rate
0.1%
1 of 1,573 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
GEG - Spokane
Full on-time, delay-cause, and seasonal performance for Spokane, WA.
Origin airport →BOI - Boise
Full on-time, delay-cause, and seasonal performance for Boise, ID.
Destination airport →Compare the two airports
See GEG and BOI side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to GEG–BOI.
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What the Data Says About GEG to BOI
Spokane to Boise (GEG to BOI) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.6% on-time rate across 2,947 flights, with delays that do happen averaging 67.8 minutes. The corridor runs roughly 287 miles and is served by 6 carriers. Over the most recent 24 months, 4 of 1,573 flights were cancelled (0.3%) and 1 diverted (0.1%).
The monthly split is wide on this route: Oct 2022 posted the strongest performance at 95% on-time, while Dec 2022 came in at just 62% - a 33-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.