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Ranking & search details
12 nonstop, 34 with 1 connection · ranked by overall best · 25 hidden by your Most reliable time setting (they leave at other times of day) · showing the top 3
Most reliable time: morning departures (5–11 AM), the window with the best on-time odds for this trip. Turn off “Most reliable” under Departure time in Advanced settings to see every time.
Fares seen on this date: nonstop from 251 · any route from 134 (recent searches, one way, per person; each card opens the live price)
21 matching trips
Why this is our top pick
- This morning flight leaves in the most reliable time of day on this route: its best departures have a 93% reliability rating vs 79% for night departures.
- Compared with the next-best option (Delta 1128 on the Boeing 737-900ER or Airbus A321neo), it arrives on time 2 points more often.
- Legroom was comparable across the flights we compared (30 in), so it didn't set them apart.
Aircraft and legroom reflect the planes each flight has flown recently. Airlines can swap planes and seat maps change, so check the airline’s seat map when you book.
SEA → SLC
Seattle to Salt Lake City: 4,119 nonstop flights a year
On time (12 months)
83%
Cancelled
1.0%
avg delay 10 min
Best time to leave
Before 9 AM
93% on time vs 78% 3 to 6 PM
Most reliable airline
Delta
86% chance on time
Lowest nonstop fare seen in the next two months: $251 (Alaska 430 on 2026-10-26). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines86%
2,218 flights · 87% on time as flown · 0.6% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)81%
439 flights · 80% on time as flown · 0.2% cancel
- Alaska Airlines77%
1,355 flights · 78% on time as flown · 1.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
814 flights · avg delay 6 min
- 9 AM to noon81%
1,139 flights · avg delay 10 min
- Noon to 3 PM83%
493 flights · avg delay 10 min
- 3 to 6 PM78%
841 flights · avg delay 12 min
- 6 to 9 PM81%
831 flights · avg delay 10 min
Best day: Wednesday (86%). Worst: Friday (81%).
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