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Route on-time record

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

Seattle (Seattle–Tacoma International Airport) to Pasco (Tri Cities Airport). 1,912 nonstop flights in Jun 2025 to May 2026, 83% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was SkyWest 3891 at 3:35 PM.

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

Find me the most reliable flights fromtoonreturning(optional)

SEA → PSC

Seattle to Pasco: 1,912 nonstop flights a year

On time (12 months)

83%

Cancelled

0.9%

avg delay 11 min

Best time to leave

3 to 6 PM

87% on time vs 78% after 9 PM

Most reliable airline

SkyWest

84% chance on time

Check SEA to PSC fares

Lowest nonstop fare seen in the next two months: $216 (Alaska 3110 on 2026-10-29). 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 · SkyWest 3891 · sold as United Express, Delta Connection, American Eagle or Alaska

    3:35 PM → 4:39 PM1h 06m nonstop

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

    85%

    chance on time

    On time (history)
    85%
    Cancelled
    0.6%
    Avg arrival delay
    10 min
    • Arrived on time 85% of the time (162 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (3 to 6 PM: 87% on time; After 9 PM: 78%).
    • 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 · 162 flights

    Find 3:35 PM flight fares Opens this date on Aviasales

  2. #2 · SkyWest 3992 · sold as United Express, Delta Connection, American Eagle or Alaska

    10:35 AM → 11:46 AM1h 08m nonstop

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

    85%

    chance on time

    On time (history)
    85%
    Cancelled
    0.6%
    Avg arrival delay
    11 min
    • Arrived on time 85% of the time (168 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).

    Moderate track record · 168 flights

    Find 10:35 AM flight fares Opens this date on Aviasales

  3. #3 · SkyWest 3955 · sold as United Express, Delta Connection, American Eagle or Alaska

    1:35 PM → 2:50 PM1h 15m nonstop

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

    84%

    chance on time

    On time (history)
    84%
    Cancelled
    0.0%
    Avg arrival delay
    17 min
    • Arrived on time 84% of the time (25 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).

    Limited track record · 25 flights

    Find 1:35 PM flight fares Opens this date on Aviasales

  4. #4 · SkyWest 4017 · sold as United Express, Delta Connection, American Eagle or Alaska

    10:40 PM → 11:47 PM1h 07m nonstop

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

    83%

    chance on time

    On time (history)
    83%
    Cancelled
    0.3%
    Avg arrival delay
    18 min
    • Arrived on time 83% of the time (363 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (After 9 PM: 78% on time; 3 to 6 PM: 87%).
    • 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 · 363 flights

    Find 10:40 PM flight fares Opens this date on Aviasales

  5. #5 · SkyWest 3353 · sold as United Express, Delta Connection, American Eagle or Alaska

    2:38 PM → 3:42 PM1h 04m nonstop

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

    81%

    chance on time

    On time (history)
    81%
    Cancelled
    0.0%
    Avg arrival delay
    12 min
    • Arrived on time 81% of the time (21 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).
    • 91% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 21 flights

    Find 2:38 PM flight 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%

    1,607 flights · 84% on time as flown · 0.7% cancel

On time by departure time

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

  • 9 AM to noon84%

    630 flights · avg delay 9 min

  • Noon to 3 PM82%

    95 flights · avg delay 13 min

  • 3 to 6 PM87%

    418 flights · avg delay 8 min

  • 6 to 9 PM85%

    238 flights · avg delay 7 min

  • After 9 PM78%

    501 flights · avg delay 18 min

Best day: Wednesday (85%). Worst: Thursday (79%).

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
78
F
79
M
81
A
83
M
80
J
79
J
83
A
81
S
83
O
87
N
88
D
82

What delays this route

  • Airline (crew, maintenance, boarding)50%
  • Late-arriving aircraft21%
  • Severe weather19%
  • Air traffic control and airport volume10%

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

Finding the most reliable connections from SEA to PSC…

SEA to PSC questions

What time of day is best to fly SEA to PSC?
3 to 6 PM: 87% of flights arrived on time, against 78% for departures after 9 PM.
Which airline is most on time from SEA to PSC?
SkyWest, with a season-adjusted 84% chance of operating and arriving on time over 1,607 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 PSC?
January (78% on time); the best was November (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.

More routes from SEA

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Live status: FAA delays and ground stops