Route on-time record
PHX to SEA: most on-time flights and the best time to fly
Phoenix (Phoenix Sky Harbor International Airport) to Seattle (Seattle–Tacoma International Airport). 7,317 nonstop flights in Jun 2025 to May 2026, 83% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was Delta 2444 at 6:15 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PHX → SEA
Phoenix to Seattle: 7,317 nonstop flights a year
On time (12 months)
83%
Cancelled
0.6%
avg delay 10 min
Best time to leave
Before 9 AM
88% on time vs 64% after 9 PM
Most reliable airline
Delta
87% chance on time
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 2444
6:15 AM → 9:24 AM3h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
95%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.8%
- Avg arrival delay
- 5 min
- Arrived on time 96% of the time (360 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; After 9 PM: 64%).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
Strong track record · 360 flights
Find Delta 2444 fares Opens this date on Aviasales#2 · Delta 2419
12:55 PM → 4:06 PM3h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.5%
- Avg arrival delay
- 4 min
- Arrived on time 93% of the time (363 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).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 363 flights
Find Delta 2419 fares Opens this date on Aviasales#3 · Envoy 3793 · sold as American Eagle
7:15 AM → 10:33 AM3h 18m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Envoy 4149; its record covers all of them.
92%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 96% 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: 88% on time; After 9 PM: 64%).
- 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 7:15 AM flight fares Opens this date on Aviasales#4 · Alaska 605
6:00 AM → 9:14 AM3h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.9%
- Avg arrival delay
- 6 min
- Arrived on time 93% of the time (215 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; After 9 PM: 64%).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
Strong track record · 215 flights
Find Alaska 605 fares Opens this date on Aviasales#5 · American 2448
10:40 AM → 1:54 PM3h 14m nonstop
Local times, typical schedule. Last flown 2026-05-06.
90%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (30 flights, Jun 2025 to May 2026).
- Never cancelled in 30 scheduled flights.
- 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 (30 flights), so its score leans on the airline's record at this hour.
Limited track record · 30 flights
Find American 2448 fares Opens this date on Aviasales#6 · Alaska 603
12:06 PM → 3:20 PM3h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.3%
- Avg arrival delay
- 9 min
- Arrived on time 90% of the time (345 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).
Strong track record · 345 flights
Find Alaska 603 fares Opens this date on Aviasales#7 · Envoy 4035 · sold as American Eagle
2:31 PM → 5:44 PM3h 13m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Envoy 4291; its record covers all of them.
88%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 90% of the time (119 flights, Jun 2025 to May 2026).
- Never cancelled in 121 scheduled flights.
- Departs inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Moderate track record · 119 flights
Find 2:31 PM flight fares Opens this date on Aviasales#8 · Alaska 637
10:22 AM → 1:43 PM3h 18m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.6%
- Avg arrival delay
- 8 min
- Arrived on time 89% of the time (350 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).
Strong track record · 350 flights
Find Alaska 637 fares Opens this date on Aviasales#9 · Alaska 1423
5:02 PM → 8:17 PM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.9%
- Avg arrival delay
- 6 min
- Arrived on time 93% of the time (108 flights, Jun 2025 to May 2026).
- Departs inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Moderate track record · 108 flights
Find Alaska 1423 fares Opens this date on Aviasales#10 · Alaska 401
4:02 PM → 7:17 PM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.5%
- Avg arrival delay
- 8 min
- Arrived on time 88% of the time (211 flights, Jun 2025 to May 2026).
- Departs inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 211 flights
Find Alaska 401 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines87%
1,764 flights · 88% on time as flown · 0.9% cancel
- Envoy Air (sold as American Eagle)86%
647 flights · 86% on time as flown · 0.1% cancel
- Frontier Airlines85%
191 flights · 85% on time as flown · 0.3% cancel
- Alaska Airlines84%
2,926 flights · 84% on time as flown · 0.7% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)83%
547 flights · 83% on time as flown · 0.6% cancel
- American Airlines81%
206 flights · 81% on time as flown · 0.5% cancel
- Southwest Airlines67%
1,036 flights · 66% on time as flown · 0.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM88%
1,982 flights · avg delay 7 min
- 9 AM to noon85%
1,372 flights · avg delay 9 min
- Noon to 3 PM84%
1,377 flights · avg delay 12 min
- 3 to 6 PM78%
1,507 flights · avg delay 13 min
- 6 to 9 PM80%
838 flights · avg delay 12 min
- After 9 PM64%
241 flights · avg delay 16 min
Best day: Tuesday (85%). Worst: Friday (81%).
Smarter routing
Nearby airports that run more on time
PHX → PAE 85% chance on time
Phoenix Sky Harbor International Airport to Seattle Paine Field International Airport · 635 flights a year · 32 mi from your airports · yours: 82%
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 aircraft47%
- Airline (crew, maintenance, boarding)33%
- Air traffic control and airport volume16%
- Severe weather4%
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 SEA questions
- What time of day is best to fly PHX to SEA?
- Before 9 AM: 88% of flights arrived on time, against 64% 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 SEA?
- Delta, with a season-adjusted 87% chance of operating and arriving on time over 1,764 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 SEA?
- July (78% on time); the best was February (87%), 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
- SEA to PHX (return)
- PHX to DEN 77%
- PHX to LAX 83%
- PHX to LAS 79%
- PHX to SAN 74%
- PHX to SLC 83%
- PHX to ORD 77%
- PHX to DFW 80%
- PHX to SFO 71%
- PHX to SNA 80%
- PHX to ATL 82%
- PHX to PDX 79%
- PHX to SMF 80%
Live status: FAA delays and ground stops