Route on-time record

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

San Diego (San Diego International Airport) to Salt Lake City (Salt Lake City International Airport). 2,922 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was Delta 1117 at 6:15 AM.

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

SAN → SLC

San Diego to Salt Lake City: 2,922 nonstop flights a year

On time (12 months)

84%

Cancelled

0.6%

avg delay 11 min

Best time to leave

Before 9 AM

94% on time vs 77% 3 to 6 PM

Most reliable airline

Delta

88% chance on time

Check SAN 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 · Delta 1117
6:15 AM → 9:22 AM2h 08m nonstop
Local times, typical schedule. Last flown 2026-05-31.
95%
chance on time
On time (history)
95%
Cancelled
0.8%
Avg arrival delay
5 min
- Arrived on time 95% of the time (362 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 3 to 6 PM: 77%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Strong track record · 362 flights
Find Delta 1117 fares Opens this date on Aviasales
#2 · Delta 1177
9:50 AM → 12:50 PM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
On time (history)
92%
Cancelled
0.8%
Avg arrival delay
8 min
- Arrived on time 92% of the time (360 flights, Jun 2025 to May 2026).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Strong track record · 360 flights
Find Delta 1177 fares Opens this date on Aviasales
#3 · Delta 1752
7:11 PM → 10:15 PM2h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 1252; its record covers all of them.
90%
chance on time
On time (history)
92%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 92% of the time (73 flights, Jun 2025 to May 2026).
- Never cancelled in 73 scheduled flights.
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
Moderate track record · 73 flights
Find Delta 1752 fares Opens this date on Aviasales
#4 · Southwest 4205
6:40 AM → 9:50 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-05.
89%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 90% of the time (10 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 3 to 6 PM: 77%).
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find Southwest 4205 fares Opens this date on Aviasales
#5 · Delta 1596
1:30 PM → 4:30 PM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 1296; its record covers all of them.
87%
chance on time
On time (history)
87%
Cancelled
1.0%
Avg arrival delay
10 min
- Arrived on time 87% of the time (192 flights, Jun 2025 to May 2026).
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
- 50% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 192 flights
Find Delta 1596 fares Opens this date on Aviasales
#6 · Delta 1567
7:05 PM → 10:08 PM2h 03m nonstop
Local times, typical schedule. Last flown 2026-04-12.
85%
chance on time
On time (history)
84%
Cancelled
0.0%
Avg arrival delay
38 min
- Arrived on time 84% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Delta 1567 fares Opens this date on Aviasales
#7 · SkyWest 3117 · sold as United Express, Delta Connection, American Eagle or Alaska
9:12 AM → 12:17 PM2h 05m nonstop
Local times, typical schedule. Last flown 2026-03-17.
84%
chance on time
On time (history)
85%
Cancelled
0.0%
Avg arrival delay
12 min
- Arrived on time 85% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 34 scheduled flights.
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find 9:12 AM flight fares Opens this date on Aviasales
#8 · Delta 1210
5:01 PM → 8:00 PM1h 59m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
On time (history)
83%
Cancelled
0.6%
Avg arrival delay
12 min
- Arrived on time 83% of the time (337 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 77% on time; Before 9 AM: 94%).
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
- 75% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 337 flights
Find Delta 1210 fares Opens this date on Aviasales
#9 · SkyWest 3488 · sold as United Express, Delta Connection, American Eagle or Alaska
9:27 AM → 12:39 PM2h 12m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
On time (history)
81%
Cancelled
0.0%
Avg arrival delay
12 min
- Arrived on time 81% of the time (215 flights, Jun 2025 to May 2026).
- Never cancelled in 215 scheduled flights.
- Departs inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
Strong track record · 215 flights
Find 9:27 AM flight fares Opens this date on Aviasales
#10 · Frontier 1902
6:47 PM → 9:49 PM2h 02m nonstop
Local times, typical schedule. Last flown 2026-05-04.
80%
chance on time
On time (history)
81%
Cancelled
0.8%
Avg arrival delay
18 min
- Arrived on time 81% of the time (128 flights, Jun 2025 to May 2026).
- Departs outside SAN's trouble window (6 AM to noon, when 66% of its 164 ground stops and delay programs started).
- 54% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 128 flights
Find Frontier 1902 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Delta Air Lines88%
1,733 flights · 89% on time as flown · 0.6% cancel
Frontier Airlines82%
142 flights · 82% on time as flown · 0.7% cancel
SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)78%
639 flights · 78% on time as flown · 0.8% cancel
Southwest Airlines77%
408 flights · 76% on time as flown · 0.3% cancel

On time by departure time

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

Before 9 AM94%
508 flights · avg delay 6 min
9 AM to noon89%
640 flights · avg delay 10 min
Noon to 3 PM83%
528 flights · avg delay 11 min
3 to 6 PM77%
801 flights · avg delay 14 min
6 to 9 PM81%
445 flights · avg delay 14 min

Best day: Tuesday (88%). Worst: Friday (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

Late-arriving aircraft55%
Airline (crew, maintenance, boarding)31%
Air traffic control and airport volume11%
Severe weather3%

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

SAN to SLC questions

What time of day is best to fly SAN to SLC?: Before 9 AM: 94% of flights arrived on time, against 77% for departures 3 to 6 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 SAN to SLC?: Delta, with a season-adjusted 88% chance of operating and arriving on time over 1,733 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 SAN to SLC?: July (78% on time); the best was April (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.

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