Route · GEG → SLC · 2020–2025 BTS data
Spokane to Salt Lake City
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), GEG to SLC (Spokane to Salt Lake City) ranks #1248 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 89%
- On-time
- +10 pts
- vs US avg
- 87 min
- Delay when late
- 9,437
- Flights
- #1248 of 4927
- Corpus placement
Cancelled
0.4%
Best Month
Apr 2024 96%
Worst Month
Jul 2024 76%
Distance
546 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 147 | 10 | 1 | 0 | DL,OO |
| Nov 2025 | 135 | 11 | 1 | 0 | OO,DL |
| Oct 2025 | 146 | 16 | 1 | 0 | OO,DL |
| Sep 2025 | 137 | 13 | 0 | 0 | OO,DL |
| Aug 2025 | 144 | 22 | 1 | 1 | OO,DL |
| Jul 2025 | 146 | 17 | 0 | 0 | DL,OO |
| Jun 2025 | 144 | 14 | 0 | 0 | DL,OO |
| May 2025 | 150 | 23 | 0 | 0 | DL,OO |
| Apr 2025 | 152 | 9 | 0 | 0 | OO,DL |
| Mar 2025 | 145 | 13 | 0 | 0 | DL,OO |
| Feb 2025 | 106 | 19 | 0 | 0 | DL,OO |
| Jan 2025 | 123 | 10 | 0 | 0 | DL,OO |
| Dec 2024 | 147 | 26 | 0 | 0 | DL,OO |
| Nov 2024 | 128 | 12 | 0 | 0 | DL,OO |
| Oct 2024 | 146 | 9 | 0 | 0 | OO,DL |
| Sep 2024 | 139 | 12 | 0 | 1 | OO,DL |
| Aug 2024 | 133 | 30 | 0 | 0 | DL,OO |
| Jul 2024 | 145 | 35 | 9 | 0 | DL,OO |
| Jun 2024 | 144 | 18 | 0 | 0 | DL,OO |
| May 2024 | 150 | 20 | 0 | 0 | DL,OO |
| Apr 2024 | 146 | 6 | 1 | 1 | DL,OO |
| Mar 2024 | 141 | 9 | 0 | 0 | DL,OO |
| Feb 2024 | 107 | 11 | 0 | 0 | DL,OO |
| Jan 2024 | 123 | 28 | 0 | 0 | DL,OO |
GEG–SLC seasonal on-time pattern
Best: April (94.3%) · weakest: December (80.9%)
Strongest calendar month
April
94.3% on-time · ~131 flights/mo
Busiest calendar month
July
~139 flights/mo avg
Weakest calendar month
December
80.9% on-time · ~135 flights/mo
Cancellation Rate
0.4%
14 of 3,324 flights
Diversion Rate
0.1%
3 of 3,324 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.
GEG on-time profileSLC - Salt Lake City
Full on-time, delay-cause, and seasonal performance for Salt Lake City, UT.
SLC on-time profileCompare the two airports
See GEG and SLC side by side on delays, cancellations, and reliability.
Compare GEG vs SLCOrigin-hub reliability standing
Among GEG's stronger departures
GEG → SLC posts a 89% on-time rate, landing in the ≥85% band with 12 of 18 BTS-tracked routes leaving Spokane. The same hub also shows 6 mid-band and 0 challenged departures · fleet-wide on-time rank #247 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to GEG–SLC.
Routes with a similar on-time rate
What the Data Says About GEG to SLC
Spokane to Salt Lake City (GEG to SLC) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 89% on-time rate across 9,437 flights, with delays that do happen averaging 86.6 minutes. The corridor runs roughly 546 miles and is served by 3 carriers. Over the most recent 24 months, 14 of 3,324 flights were cancelled (0.4%) and 3 diverted (0.1%).
The monthly split is wide on this route: Apr 2024 posted the strongest performance at 96% on-time, while Jul 2024 came in at just 76% - a 20-point swing worth factoring into travel timing.
On the multi-year calendar, GEG–SLC peaks in April at 94.3% on-time while July carries the heaviest traffic (~139 flights per month) ; the softest month is December at 80.9%, a 13.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does GEG to SLC rank among US routes by traffic? ▼
How often are flights delayed from GEG to SLC? ▼
What is the cancellation rate for GEG to SLC? ▼
How far is the flight from GEG to SLC? ▼
When is the best time to fly from GEG to SLC? ▼
Airports on this route
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.
Using GEG–SLC data
GEG–SLC runs 10 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare GEG and SLC airport profiles: delay causes and top routes differ even on the same corridor. GEG airport
- If your dates flex, April (94.3% on-time) beats December (80.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 89% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.