Skip to content

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Your shortcuts, saved on this device. Search to add an airport.

No airports saved yet. Add the fields you visit most.

Ask ATIS

Route on-time record

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

Tucson (Tucson International Airport) to San Diego (San Diego International Airport). 653 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was Southwest 4118 at 6:05 AM.

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

TUS → SAN

Tucson to San Diego: 653 nonstop flights a year

On time (12 months)

78%

Cancelled

0.5%

avg delay 15 min

Best time to leave

Before 9 AM

94% on time vs 58% 6 to 9 PM

Most reliable airline

Southwest

77% chance on time

Check TUS to SAN fares

Lowest nonstop fare seen in the next two months: $172 (Southwest 3628 on 2026-11-16). 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. #1 · Southwest 4118

    6:05 AM → 7:25 AM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    93%

    chance on time

    On time (history)
    98%
    Cancelled
    0.0%
    Avg arrival delay
    1 min
    • Arrived on time 98% of the time (46 flights, Jun 2025 to May 2026).
    • Never cancelled in 46 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 94% on time; 6 to 9 PM: 58%).
    • Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.

    Limited track record · 46 flights

    Find Southwest 4118 fares Opens this date on Aviasales

  2. #2 · Southwest 2004

    6:15 AM → 7:40 AM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    90%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 93% of the time (28 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 94% on time; 6 to 9 PM: 58%).
    • Lands inside SAN's trouble window: 66% of its 164 ground stops and delay programs started between 6 AM and noon.
    • Short track record (28 flights), so its score leans on the airline's record at this hour.

    Limited track record · 28 flights

    Find Southwest 2004 fares Opens this date on Aviasales

  3. #3 · Southwest 1614

    5:35 PM → 7:05 PM1h 30m nonstop

    Local times, typical schedule. Last flown 2026-04-01.

    77%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 1614 fares Opens this date on Aviasales

  4. #4 · Southwest 4281

    4:25 PM → 5:50 PM1h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-30.

    69%

    chance on time

    On time (history)
    50%
    Cancelled
    0.0%
    Avg arrival delay
    16 min
    • Arrived on time 50% of the time (8 flights, Jun 2025 to May 2026).
    • Short track record (8 flights), so its score leans on the airline's record at this hour.

    Limited track record · 8 flights

    Find Southwest 4281 fares Opens this date on Aviasales

  5. #5 · Southwest 2664

    6:40 PM → 8:00 PM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 199; its record covers all of them.

    57%

    chance on time

    On time (history)
    47%
    Cancelled
    0.0%
    Avg arrival delay
    33 min
    • Arrived on time 47% of the time (64 flights, Jun 2025 to May 2026).
    • Never cancelled in 64 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 58% on time; Before 9 AM: 94%).

    Moderate track record · 64 flights

    Find Southwest 2664 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines77%

    653 flights · 78% on time as flown · 0.5% cancel

On time by departure time

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

  • Before 9 AM94%

    264 flights · avg delay 3 min

  • 9 AM to noon92%

    77 flights · avg delay 5 min

  • 3 to 6 PM63%

    92 flights · avg delay 24 min

  • 6 to 9 PM58%

    214 flights · avg delay 29 min

Best day: Wednesday (88%). Worst: Friday (74%).

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.

J
89
F
87
M
79
A
80
M
73
J
79
J
76
A
84
S
84
O
72
N
86
D
86

What delays this route

  • Late-arriving aircraft61%
  • Air traffic control and airport volume23%
  • Airline (crew, maintenance, boarding)15%
  • Severe weather1%

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

TUS to SAN questions

What time of day is best to fly TUS to SAN?
Before 9 AM: 94% of flights arrived on time, against 58% 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 TUS to SAN?
Southwest, with a season-adjusted 77% chance of operating and arriving on time over 653 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 TUS to SAN?
October (72% on time); the best was January (89%), 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 TUS

Live status: FAA delays and ground stops