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Route on-time record

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

Seattle (Seattle–Tacoma International Airport) to Phoenix (Phoenix Sky Harbor International Airport). 7,317 nonstop flights in Jun 2025 to May 2026, 79% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was Alaska 610 at 7:00 AM.

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

SEA → PHX

Seattle to Phoenix: 7,317 nonstop flights a year

On time (12 months)

79%

Cancelled

0.7%

avg delay 13 min

Best time to leave

Before 9 AM

91% on time vs 73% 3 to 6 PM

Most reliable airline

Envoy

84% chance on time

Check SEA to PHX fares

Lowest nonstop fare seen in the next two months: $134 (Southwest 3434 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 · Alaska 610

    7:00 AM → 9:58 AM2h 58m nonstop

    Local times, typical schedule. Last flown 2026-05-12.

    93%

    chance on time

    On time (history)
    100%
    Cancelled
    0.0%
    Avg arrival delay
    0 min
    • Arrived on time 100% of the time (21 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 73%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Short track record (21 flights), so its score leans on the airline's record at this hour.

    Limited track record · 21 flights

    Find Alaska 610 fares Opens this date on Aviasales

  2. #2 · Delta 2419

    8:55 AM → 11:52 AM2h 58m nonstop

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

    91%

    chance on time

    On time (history)
    92%
    Cancelled
    0.3%
    Avg arrival delay
    5 min
    • Arrived on time 92% of the time (364 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 73%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).

    Strong track record · 364 flights

    Find Delta 2419 fares Opens this date on Aviasales

  3. #3 · Envoy 3441 · sold as American Eagle

    7:25 AM → 10:30 AM3h 05m nonstop

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

    91%

    chance on time

    On time (history)
    90%
    Cancelled
    0.0%
    Avg arrival delay
    5 min
    • Arrived on time 90% of the time (30 flights, Jun 2025 to May 2026).
    • Never cancelled in 30 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 73%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).

    Limited track record · 30 flights

    Find 7:25 AM flight fares Opens this date on Aviasales

  4. #4 · Envoy 4180 · sold as American Eagle

    6:30 AM → 9:33 AM3h 03m nonstop

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

    91%

    chance on time

    On time (history)
    92%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 92% of the time (62 flights, Jun 2025 to May 2026).
    • Never cancelled in 62 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 73%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).

    Moderate track record · 62 flights

    Find 6:30 AM flight fares Opens this date on Aviasales

  5. #5 · Envoy 3792 · sold as American Eagle

    6:20 AM → 9:19 AM2h 59m nonstop

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

    91%

    chance on time

    On time (history)
    91%
    Cancelled
    0.0%
    Avg arrival delay
    28 min
    • Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 73%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 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 6:20 AM flight fares Opens this date on Aviasales

  6. #6 · American 2448

    2:57 PM → 5:52 PM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-05-06. Same departure also flew as American 3235; its record covers all of them.

    89%

    chance on time

    On time (history)
    92%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 92% of the time (101 flights, Jun 2025 to May 2026).
    • Never cancelled in 101 scheduled flights.
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 101 flights

    Find American 2448 fares Opens this date on Aviasales

  7. #7 · Envoy 3449 · sold as American Eagle

    2:57 PM → 5:59 PM3h 02m nonstop

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

    88%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    13 min
    • Arrived on time 93% of the time (14 flights, Jun 2025 to May 2026).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
    • 96% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 14 flights

    Find 2:57 PM flight fares Opens this date on Aviasales

  8. #8 · Southwest 3936

    6:30 AM → 9:15 AM2h 45m nonstop

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

    88%

    chance on time

    On time (history)
    94%
    Cancelled
    1.9%
    Avg arrival delay
    3 min
    • Arrived on time 94% of the time (53 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 73%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • Short track record (53 flights), so its score leans on the airline's record at this hour.

    Limited track record · 53 flights

    Find Southwest 3936 fares Opens this date on Aviasales

  9. #9 · Alaska 606

    8:06 AM → 11:06 AM3h 00m nonstop

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

    87%

    chance on time

    On time (history)
    88%
    Cancelled
    0.9%
    Avg arrival delay
    5 min
    • Arrived on time 88% of the time (330 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 73%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).

    Strong track record · 330 flights

    Find Alaska 606 fares Opens this date on Aviasales

  10. #10 · Southwest 1416

    7:50 AM → 10:40 AM2h 50m nonstop

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

    86%

    chance on time

    On time (history)
    87%
    Cancelled
    0.0%
    Avg arrival delay
    18 min
    • Arrived on time 87% of the time (15 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 3 to 6 PM: 73%).
    • Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
    • 64% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 15 flights

    Find Southwest 1416 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Envoy Air (sold as American Eagle)84%

    646 flights · 85% on time as flown · 0.1% cancel

  • American Airlines83%

    203 flights · 85% on time as flown · 0.6% cancel

  • Delta Air Lines82%

    1,765 flights · 83% on time as flown · 0.9% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)82%

    547 flights · 82% on time as flown · 0.6% cancel

  • Alaska Airlines77%

    2,930 flights · 78% on time as flown · 0.6% cancel

  • Frontier Airlines73%

    191 flights · 71% on time as flown · 2.1% cancel

  • Southwest Airlines71%

    1,035 flights · 71% on time as flown · 0.7% cancel

On time by departure time

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

  • Before 9 AM91%

    1,667 flights · avg delay 6 min

  • 9 AM to noon77%

    1,936 flights · avg delay 13 min

  • Noon to 3 PM78%

    926 flights · avg delay 16 min

  • 3 to 6 PM73%

    1,422 flights · avg delay 15 min

  • 6 to 9 PM74%

    1,298 flights · avg delay 17 min

Best day: Tuesday (83%). Worst: Friday (78%).

Smarter routing

Nearby airports that run more on time

  • PAE → PHX 84% chance on time

    Seattle Paine Field International Airport to Phoenix Sky Harbor International Airport · 632 flights a year · 32 mi from your airports · yours: 79%

    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
82
F
84
M
81
A
84
M
82
J
77
J
75
A
73
S
81
O
82
N
78
D
78

What delays this route

  • Airline (crew, maintenance, boarding)45%
  • Late-arriving aircraft36%
  • Air traffic control and airport volume18%
  • 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

SEA to PHX questions

What time of day is best to fly SEA to PHX?
Before 9 AM: 91% of flights arrived on time, against 73% 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 SEA to PHX?
Envoy, with a season-adjusted 84% chance of operating and arriving on time over 646 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 SEA to PHX?
August (73% on time); the best was April (84%), 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 SEA

Live status: FAA delays and ground stops