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1,643 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Delta is clearly ahead here: 94% of its flights arrive on time, 14 points better than Southwest.

Best time to leave 5–6 am 97% arrive on time from OAK
Best single flight DL 4061 OAK 06:00 → SLC 08:55 · 97% on time Avoid DL 3903 OAK 17:05 → SLC 20:00 · 92% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

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OAK
96
97
80
92
92
85
85
64
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55
Salt Lake City flights leaving OAK 5–6 pm: 1Close ×
DL 3903flown by SkyWest OAK 17:05 SLC 20:00 1h 57m 344 92% 0.0% 61 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
Delta (incl. SkyWest) 1,074 94% 0.2% 71 min
Southwest 569 79% 0.0% 60 min

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
DL 4061flown by SkyWest OAK 06:00 SLC 08:55 97%
DL 4134flown by SkyWest OAK 12:33 SLC 15:29 93%
DL 3903flown by SkyWest OAK 17:05 SLC 20:00 92%
All 4 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
Delta OAK SLC 1h 56m 94% 0.2% 1,074 Flying now
Southwest OAK SLC 1h 45m 79% 0.0% 569 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON