PHX to SEA flight delays & on-time performance
Nonstop flights from Phoenix Sky Harbor International Airport to Seattle–Tacoma International Airport · 1,107 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PHX or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Phoenix (PHX) to Seattle (SEA) arrived on time 82% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.7% were cancelled, and 4% arrived an hour or more late.
- Envoy Air was the most punctual airline here (88% on time); Southwest Airlines was the least (63%).
- Departures scheduled around 6am did best (94% on time); around 6pm did worst (72%).
- Saturday was the most reliable day to fly (85% on time) and Friday the least (79%).
- The largest source of delay minutes was late-arriving aircraft (47%).
Which airline is most on time from PHX to SEA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Envoy AirRegional airline operating American Eagle flights. | 88% | 0.0% | 7 min | 2.8% | 755 |
| Delta Air Lines | 88% | 1.0% | 10 min | 4.4% | 1,765 |
| Frontier Airlines | 85% | 0.0% | 13 min | 7.9% | 139 |
| Alaska Airlines | 85% | 0.7% | 10 min | 3.4% | 2,884 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 83% | 0.4% | 12 min | 5.7% | 445 |
| American Airlines | 82% | 0.5% | 11 min | 4.1% | 198 |
| Southwest Airlines | 63% | 0.6% | 18 min | 7.6% | 1,040 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am96%104 flights
- 6am94%491 flights
- 7am87%697 flights
- 8am82%604 flights
- 9am79%414 flights
- 10am85%298 flights
- 11am87%662 flights
- 12pm87%456 flights
- 1pm82%325 flights
- 2pm83%574 flights
- 3pm78%547 flights
- 4pm80%324 flights
- 5pm78%652 flights
- 6pm72%337 flights
- 7pm85%353 flights
- 8pm76%148 flights
- 9pm60%125 flights
- 10pm56%111 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%0.8% cancelled
- Tuesday85%0.3% cancelled
- Wednesday84%0.2% cancelled
- Thursday80%0.5% cancelled
- Friday79%1.1% cancelled
- Saturday85%0.6% cancelled
- Sunday83%1.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft47%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion15%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)66%
- Extreme weather23%
- Air traffic control & airport congestion11%
- Security0%
PHX to SEA: common questions
- How often are PHX to SEA flights on time?
- 82% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Phoenix to Seattle cancelled?
- 0.7% of scheduled flights were cancelled (47 of 7,226).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 56 min behind schedule on average, and 4.4% of flights were an hour or more late.
- How long is taxi time at PHX?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to PHX — 79% on time
More flights from Phoenix
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PHX → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.