Route on-time record
SMF to GEG: most on-time flights and the best time to fly
Sacramento (Sacramento International Airport) to Spokane (Spokane International Airport). 657 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.0% were cancelled. The most reliable flight number was Southwest 736 at 10:30 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SMF → GEG
Sacramento to Spokane: 657 nonstop flights a year
On time (12 months)
78%
Cancelled
0.0%
avg delay 12 min
Best time to leave
Before 9 AM
95% on time vs 70% 6 to 9 PM
Most reliable airline
Southwest
78% chance on time
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 · Southwest 736
10:30 AM → 12:20 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
86%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 100% of the time (15 flights, Jun 2025 to May 2026).
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 736 fares Opens this date on Aviasales#2 · Southwest 1937
11:00 AM → 12:50 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 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 Southwest 1937 fares Opens this date on Aviasales#3 · Southwest 3675
9:50 PM → 11:40 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
76%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 79% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 3675 fares Opens this date on Aviasales#4 · Southwest 950
8:30 PM → 10:20 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
66%
chance on time
- On time (history)
- 58%
- Cancelled
- 0.0%
- Avg arrival delay
- 29 min
- Arrived on time 58% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 70% on time; Before 9 AM: 95%).
- 81% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 55 flights
Find Southwest 950 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines78%
657 flights · 78% on time as flown · 0.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM95%
98 flights · avg delay 2 min
- 9 AM to noon87%
127 flights · avg delay 6 min
- Noon to 3 PM79%
73 flights · avg delay 12 min
- 6 to 9 PM70%
259 flights · avg delay 17 min
- After 9 PM72%
92 flights · avg delay 16 min
Best day: Saturday (86%). Worst: Friday (77%).
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
- Late-arriving aircraft75%
- Airline (crew, maintenance, boarding)21%
- 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
SMF to GEG questions
- What time of day is best to fly SMF to GEG?
- Before 9 AM: 95% of flights arrived on time, against 70% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from SMF to GEG?
- Southwest, with a season-adjusted 78% chance of operating and arriving on time over 657 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 SMF to GEG?
- July (76% on time); the best was March (88%), 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.
More routes from SMF
- GEG to SMF (return)
- SMF to LAX 86%
- SMF to SAN 74%
- SMF to SEA 82%
- SMF to LAS 80%
- SMF to DEN 82%
- SMF to PHX 82%
- SMF to BUR 85%
- SMF to SNA 84%
- SMF to SLC 88%
- SMF to ONT 85%
- SMF to PDX 82%
- SMF to LGB 86%
Live status: FAA delays and ground stops