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Route on-time record

PHX to ONT: most on-time flights and the best time to fly

Phoenix (Phoenix Sky Harbor International Airport) to Ontario (Ontario International Airport). 3,095 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was American 3168 at 7:17 AM.

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

PHX → ONT

Phoenix to Ontario: 3,095 nonstop flights a year

On time (12 months)

78%

Cancelled

0.5%

avg delay 14 min

Best time to leave

Before 9 AM

93% on time vs 65% after 9 PM

Most reliable airline

SkyWest

84% chance on time

Check PHX to ONT fares

Lowest nonstop fare seen in the next two months: $234 (Southwest 2048 on 2026-11-01). 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 · American 3168

    7:17 AM → 8:39 AM1h 22m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    91%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (14 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 65%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
    • Short track record (14 flights), so its score leans on the airline's record at this hour.

    Limited track record · 14 flights

    Find American 3168 fares Opens this date on Aviasales

  2. #2 · American 1423

    7:27 AM → 8:51 AM1h 24m nonstop

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

    91%

    chance on time

    On time (history)
    93%
    Cancelled
    1.5%
    Avg arrival delay
    3 min
    • Arrived on time 93% of the time (128 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 65%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).

    Moderate track record · 128 flights

    Find American 1423 fares Opens this date on Aviasales

  3. #3 · Southwest 3829

    7:50 AM → 9:20 AM1h 30m nonstop

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

    90%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (20 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 65%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
    • Short track record (20 flights), so its score leans on the airline's record at this hour.

    Limited track record · 20 flights

    Find Southwest 3829 fares Opens this date on Aviasales

  4. #4 · Envoy 4143 · sold as American Eagle

    3:04 PM → 4:22 PM1h 18m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    89%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 91% of the time (44 flights, Jun 2025 to May 2026).
    • Never cancelled in 44 scheduled flights.
    • Departs inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (44 flights), so its score leans on the airline's record at this hour.

    Limited track record · 44 flights

    Find 3:04 PM flight fares Opens this date on Aviasales

  5. #5 · Southwest 3078

    7:30 AM → 8:45 AM1h 15m nonstop

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

    88%

    chance on time

    On time (history)
    89%
    Cancelled
    0.0%
    Avg arrival delay
    6 min
    • Arrived on time 89% of the time (54 flights, Jun 2025 to May 2026).
    • Never cancelled in 54 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 65%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).

    Limited track record · 54 flights

    Find Southwest 3078 fares Opens this date on Aviasales

  6. #6 · Southwest 1666

    8:45 AM → 10:05 AM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-27.

    85%

    chance on time

    On time (history)
    81%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 81% of the time (16 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 65%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
    • Short track record (16 flights), so its score leans on the airline's record at this hour.

    Limited track record · 16 flights

    Find Southwest 1666 fares Opens this date on Aviasales

  7. #7 · American 2244

    10:45 AM → 12:05 PM1h 20m nonstop

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

    83%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    23 min
    • Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find American 2244 fares Opens this date on Aviasales

  8. #8 · Southwest 3311

    8:10 AM → 9:40 AM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-04-05.

    83%

    chance on time

    On time (history)
    78%
    Cancelled
    0.0%
    Avg arrival delay
    14 min
    • Arrived on time 78% of the time (18 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 65%).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
    • 63% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 18 flights

    Find Southwest 3311 fares Opens this date on Aviasales

  9. #9 · American 2463

    10:10 AM → 11:34 AM1h 24m nonstop

    Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as American 3016; its record covers all of them.

    82%

    chance on time

    On time (history)
    82%
    Cancelled
    0.6%
    Avg arrival delay
    9 min
    • Arrived on time 82% of the time (178 flights, Jun 2025 to May 2026).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).

    Moderate track record · 178 flights

    Find American 2463 fares Opens this date on Aviasales

  10. #10 · Southwest 2209

    9:35 AM → 10:55 AM1h 20m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    81%

    chance on time

    On time (history)
    70%
    Cancelled
    0.0%
    Avg arrival delay
    13 min
    • Arrived on time 70% of the time (23 flights, Jun 2025 to May 2026).
    • Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
    • 52% of its delay minutes came from the plane arriving late from an earlier flight.
    • Short track record (23 flights), so its score leans on the airline's record at this hour.

    Limited track record · 23 flights

    Find Southwest 2209 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)84%

    119 flights · 88% on time as flown · 0.6% cancel

  • Envoy Air (sold as American Eagle)84%

    47 flights · 91% on time as flown · 0.3% cancel

  • American Airlines79%

    1,321 flights · 80% on time as flown · 0.7% cancel

  • Southwest Airlines75%

    1,608 flights · 75% on time as flown · 0.2% cancel

On time by departure time

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

  • Before 9 AM93%

    443 flights · avg delay 3 min

  • 9 AM to noon87%

    688 flights · avg delay 9 min

  • Noon to 3 PM80%

    358 flights · avg delay 13 min

  • 3 to 6 PM76%

    682 flights · avg delay 16 min

  • 6 to 9 PM65%

    612 flights · avg delay 20 min

  • After 9 PM65%

    312 flights · avg delay 21 min

Best day: Tuesday (85%). Worst: Friday (76%).

Smarter routing

Nearby airports that run more on time

  • PHX → LAX 83% chance on time

    Phoenix Sky Harbor International Airport to Los Angeles International Airport · 7,608 flights a year · 47 mi from your airports · yours: 77%

    Rank flightsFares

  • PHX → LGB 80% chance on time

    Phoenix Sky Harbor International Airport to Long Beach International Airport · 1,537 flights a year · 36 mi from your airports · yours: 77%

    Rank flightsFares

  • PHX → BUR 80% chance on time

    Phoenix Sky Harbor International Airport to Hollywood Burbank/Bob Hope Airport · 3,118 flights a year · 44 mi from your airports · yours: 77%

    Rank flightsFares

  • PHX → SNA 79% chance on time

    Phoenix Sky Harbor International Airport to John Wayne Orange County International Airport · 4,578 flights a year · 30 mi from your airports · yours: 77%

    Rank flightsFares

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
84
F
86
M
81
A
80
M
73
J
76
J
76
A
81
S
79
O
81
N
85
D
83

What delays this route

  • Late-arriving aircraft61%
  • Airline (crew, maintenance, boarding)35%
  • Air traffic control and airport volume4%

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

PHX to ONT questions

What time of day is best to fly PHX to ONT?
Before 9 AM: 93% of flights arrived on time, against 65% for departures after 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 PHX to ONT?
SkyWest, with a season-adjusted 84% chance of operating and arriving on time over 119 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 PHX to ONT?
May (73% on time); the best was February (86%), 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 PHX

Live status: FAA delays and ground stops