Route on-time record

GEG to SLC: most on-time flights and the best time to fly

Spokane (Spokane International Airport) to Salt Lake City (Salt Lake City International Airport). 1,664 nonstop flights in Jun 2025 to May 2026, 91% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was SkyWest 3787 at 9:45 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

GEG → SLC

Spokane to Salt Lake City: 1,664 nonstop flights a year

On time (12 months)

91%

Cancelled

0.6%

avg delay 8 min

Best time to leave

9 AM to noon

96% on time vs 87% 3 to 6 PM

Most reliable airline

SkyWest

93% chance on time

Check GEG to SLC fares

Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

#1 · SkyWest 3787 · sold as United Express, Delta Connection, American Eagle or Alaska
9:45 AM → 12:36 PM1h 51m nonstop
Local times, typical schedule. Last flown 2026-05-06.
96%
chance on time
On time (history)
96%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 96% of the time (218 flights, Jun 2025 to May 2026).
- Never cancelled in 218 scheduled flights.
- Leaves in this route's most on-time window (9 AM to noon: 96% on time; 3 to 6 PM: 87%).
Strong track record · 218 flights
Find 9:45 AM flight fares Opens this date on Aviasales
#2 · SkyWest 4142 · sold as United Express, Delta Connection, American Eagle or Alaska
12:58 PM → 3:49 PM1h 51m nonstop
Local times, typical schedule. Last flown 2026-05-06.
96%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
0 min
- Arrived on time 100% of the time (24 flights, Jun 2025 to May 2026).
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find 12:58 PM flight fares Opens this date on Aviasales
#3 · SkyWest 3795 · sold as United Express, Delta Connection, American Eagle or Alaska
9:55 AM → 12:47 PM1h 52m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as SkyWest 3726; its record covers all of them.
95%
chance on time
On time (history)
97%
Cancelled
1.6%
Avg arrival delay
1 min
- Arrived on time 97% of the time (60 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 96% on time; 3 to 6 PM: 87%).
Moderate track record · 60 flights
Find 9:55 AM flight fares Opens this date on Aviasales
#4 · SkyWest 3963 · sold as United Express, Delta Connection, American Eagle or Alaska
6:45 PM → 9:35 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
On time (history)
95%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 95% of the time (59 flights, Jun 2025 to May 2026).
- Never cancelled in 59 scheduled flights.
- Short track record (59 flights), so its score leans on the airline's record at this hour.
Limited track record · 59 flights
Find 6:45 PM flight fares Opens this date on Aviasales
#5 · SkyWest 3503 · sold as United Express, Delta Connection, American Eagle or Alaska
4:57 PM → 7:49 PM1h 52m nonstop
Local times, typical schedule. Last flown 2026-05-19. Same departure also flew as SkyWest 4457; its record covers all of them.
92%
chance on time
On time (history)
93%
Cancelled
0.8%
Avg arrival delay
6 min
- Arrived on time 93% of the time (127 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 87% on time; 9 AM to noon: 96%).
Moderate track record · 127 flights
Find 4:57 PM flight fares Opens this date on Aviasales
#6 · SkyWest 3623 · sold as United Express, Delta Connection, American Eagle or Alaska
7:15 PM → 10:03 PM1h 48m nonstop
Local times, typical schedule. Last flown 2026-04-12.
91%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
7 min
- Arrived on time 90% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find 7:15 PM flight fares Opens this date on Aviasales
#7 · Delta 1440
5:30 AM → 8:18 AM1h 46m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
On time (history)
92%
Cancelled
0.8%
Avg arrival delay
10 min
- Arrived on time 92% of the time (362 flights, Jun 2025 to May 2026).
Strong track record · 362 flights
Find Delta 1440 fares Opens this date on Aviasales
#8 · Delta 1452
1:50 PM → 4:37 PM1h 47m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
On time (history)
88%
Cancelled
0.3%
Avg arrival delay
11 min
- Arrived on time 88% of the time (320 flights, Jun 2025 to May 2026).
Strong track record · 320 flights
Find Delta 1452 fares Opens this date on Aviasales
#9 · Delta 1503
4:59 PM → 7:51 PM1h 52m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
On time (history)
83%
Cancelled
1.6%
Avg arrival delay
10 min
- Arrived on time 83% of the time (179 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 87% on time; 9 AM to noon: 96%).
- 84% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 179 flights
Find Delta 1503 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)93%
730 flights · 94% on time as flown · 0.4% cancel
Delta Air Lines88%
934 flights · 88% on time as flown · 0.7% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM92%
365 flights · avg delay 10 min
9 AM to noon96%
348 flights · avg delay 3 min
Noon to 3 PM88%
364 flights · avg delay 10 min
3 to 6 PM87%
346 flights · avg delay 8 min
6 to 9 PM90%
241 flights · avg delay 7 min

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

What delays this route

Airline (crew, maintenance, boarding)43%
Late-arriving aircraft40%
Severe weather12%
Air traffic control and airport volume4%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

GEG to SLC questions

What time of day is best to fly GEG to SLC?: 9 AM to noon: 96% of flights arrived on time, against 87% for departures 3 to 6 PM.
Which airline is most on time from GEG to SLC?: SkyWest, with a season-adjusted 93% chance of operating and arriving on time over 730 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on GEG to SLC?: August (83% on time); the best was April (95%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?: No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

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