Route on-time record
SMF to SEA: most on-time flights and the best time to fly
Sacramento (Sacramento International Airport) to Seattle (Seattle–Tacoma International Airport). 4,439 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was Southwest 4194 at 5:20 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SMF → SEA
Sacramento to Seattle: 4,439 nonstop flights a year
On time (12 months)
82%
Cancelled
0.3%
avg delay 10 min
Best time to leave
9 AM to noon
88% on time vs 74% 6 to 9 PM
Most reliable airline
SkyWest
86% chance on time
Lowest nonstop fare seen in the next two months: $201 (Southwest 4220 on 2026-11-07). 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 4194
5:20 AM → 7:20 AM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-30.
93%
chance on time
- On time (history)
- 98%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 98% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Short track record (47 flights), so its score leans on the airline's record at this hour.
Limited track record · 47 flights
Find Southwest 4194 fares Opens this date on Aviasales#2 · SkyWest 4075 · sold as United Express, Delta Connection, American Eagle or Alaska
7:35 AM → 9:43 AM2h 17m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 92% of the time (349 flights, Jun 2025 to May 2026).
- Never cancelled in 349 scheduled flights.
Strong track record · 349 flights
Find 7:35 AM flight fares Opens this date on Aviasales#3 · SkyWest 3881 · sold as United Express, Delta Connection, American Eagle or Alaska
11:30 AM → 1:45 PM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as SkyWest 4439; its record covers all of them.
92%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.6%
- Avg arrival delay
- 7 min
- Arrived on time 92% of the time (324 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 88% on time; 6 to 9 PM: 74%).
Strong track record · 324 flights
Find 11:30 AM flight fares Opens this date on Aviasales#4 · SkyWest 3505 · sold as United Express, Delta Connection, American Eagle or Alaska
5:09 PM → 7:14 PM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-12.
91%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.6%
- Avg arrival delay
- 3 min
- Arrived on time 93% of the time (153 flights, Jun 2025 to May 2026).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Moderate track record · 153 flights
Find 5:09 PM flight fares Opens this date on Aviasales#5 · Alaska 570
6:00 AM → 8:08 AM2h 08m nonstop
Local times, typical schedule. Last flown 2026-05-12. Same departure also flew as Alaska 1461, 1320; its record covers all of them.
91%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 93% of the time (128 flights, Jun 2025 to May 2026).
- Never cancelled in 128 scheduled flights.
Moderate track record · 128 flights
Find Alaska 570 fares Opens this date on Aviasales#6 · SkyWest 4125 · sold as United Express, Delta Connection, American Eagle or Alaska
1:17 PM → 3:25 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 88% of the time (156 flights, Jun 2025 to May 2026).
- Never cancelled in 156 scheduled flights.
Moderate track record · 156 flights
Find 1:17 PM flight fares Opens this date on Aviasales#7 · Alaska 766
7:00 AM → 9:06 AM2h 06m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 95% of the time (19 flights, Jun 2025 to May 2026).
- Short track record (19 flights), so its score leans on the airline's record at this hour.
Limited track record · 19 flights
Find Alaska 766 fares Opens this date on Aviasales#8 · SkyWest 3273 · sold as United Express, Delta Connection, American Eagle or Alaska
10:11 AM → 12:23 PM2h 12m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 88% on time; 6 to 9 PM: 74%).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 10:11 AM flight fares Opens this date on Aviasales#9 · Alaska 1462
10:00 AM → 12:03 PM2h 03m nonstop
Local times, typical schedule. Last flown 2026-04-21.
88%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 97% of the time (35 flights, Jun 2025 to May 2026).
- Never cancelled in 35 scheduled flights.
- Leaves in this route's most on-time window (9 AM to noon: 88% on time; 6 to 9 PM: 74%).
- Short track record (35 flights), so its score leans on the airline's record at this hour.
Limited track record · 35 flights
Find Alaska 1462 fares Opens this date on Aviasales#10 · Southwest 4497
5:10 AM → 7:10 AM2h 00m nonstop
Local times, typical schedule. Last flown 2026-04-06.
88%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 90% of the time (20 flights, Jun 2025 to May 2026).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 4497 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)86%
1,990 flights · 87% on time as flown · 0.3% cancel
- Alaska Airlines78%
1,280 flights · 79% on time as flown · 0.6% cancel
- Southwest Airlines78%
1,169 flights · 78% on time as flown · 0.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM87%
1,287 flights · avg delay 6 min
- 9 AM to noon88%
621 flights · avg delay 7 min
- Noon to 3 PM81%
907 flights · avg delay 11 min
- 3 to 6 PM80%
682 flights · avg delay 11 min
- 6 to 9 PM74%
835 flights · avg delay 14 min
Best day: Tuesday (88%). Worst: Sunday (80%).
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)39%
- Late-arriving aircraft29%
- Air traffic control and airport volume25%
- Severe weather7%
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 SEA questions
- What time of day is best to fly SMF to SEA?
- 9 AM to noon: 88% of flights arrived on time, against 74% for departures 6 to 9 PM.
- Which airline is most on time from SMF to SEA?
- SkyWest, with a season-adjusted 86% chance of operating and arriving on time over 1,990 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 SEA?
- June (76% on time); the best was February (90%), 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
- SEA to SMF (return)
- SMF to LAX 86%
- SMF to SAN 74%
- 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%
- SMF to DFW 80%
Live status: FAA delays and ground stops