Carrier route record
MQSEA→PHX
Envoy Air · Seattle to Phoenix
- Flights
- 760
- Period
- September 2025 to August 2026
- Share of route
- 11%
- Carriers
- 7
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Envoy Air.
Envoy on SEA to PHX earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 760 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,768 at 80.9% on time.
Set against the rest of the country, Envoy's SEA to PHX record is 8 points better than the US average of 77.3%. That gap is worth roughly 80 fewer late arrivals for every thousand flights.
Key figures
On time
85.3%
Arrivals under 15 minutes late, of 755 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
78.2%
Every carrier on SEA to PHX, 7,205 flights
These figures cover 760 flights between September 2025 and August 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Carrier by carrier
Envoy against every carrier on SEA to PHX
Envoy flew 760 of the 7,205 flights on SEA to PHX, about 11% of it. Its 85.3% on time is 7 points better than the route as a whole, which runs 78.2%. Ranked by on-time rate it is first of seven carriers on the route, where the range runs from Envoy at 85.3% to Southwest at 65.1%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 80.9% of the time; Southwest Airlines manages 65.1%. Sample sizes sit next to every figure, because a two-point gap across 1,042 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air (this page) | 760 | 85.3% | 74 min | 0.00% | A+ |
| American Airlinesthin sample | 221 | 83.2% | 76 min | 0.45% | B+ |
| Delta Air Lines | 1,768 | 80.9% | 67 min | 0.96% | B+ |
| Alaska Airlines | 2,889 | 79.2% | 45 min | 0.66% | B+ |
| SkyWest Airlines | 409 | 78.5% | 80 min | 0.49% | B+ |
| Frontier Airlinesthin sample | 116 | 74.5% | 146 min | 5.17% | C− |
| Southwest Airlines | 1,042 | 65.1% | 49 min | 0.77% | C+ |
The spread between Delta and Southwest is 16 points, wide enough that it should decide the booking. On a hundred trips that is 16 more arrivals inside the on-time window.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Envoy runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 16 points, against 16 points between the best and worst carrier.
- 5am–8am254 flights93.3%
- 8am–11am37 flights89.2%
- 11am–2pm175 flights84.4%
- 2pm–5pm117 flights76.9%
- 5pm–8pm177 flights79.3%
- 8pm–5am—
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.3% of the time, against 76.9% for the afternoon window. That is 16 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 254 flights scheduled in it.
Across the year
Envoy on SEA to PHX through the year
December is the weak month at 73.7% on time, against 96.2% in April. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. July was the busiest month here, with 120 flights.
Across the week, Wednesday is the strongest day at 92.0% on time and Friday the weakest at 74.8%, a spread of 17 points.
Arrival by arrival
How late Envoy on SEA to PHX runs when it is late
Envoy on SEA to PHX often beats the schedule: 257 of 755 completed flights, 34%, arrived 15 minutes or more early. The 111 late arrivals split 37 under half an hour, 37 between 30 and 60 minutes, and 37 an hour or more.
- 15+ min early257 flights34.0%
- Within 15 min387 flights51.3%
- 15–29 min late37 flights4.9%
- 30–59 min late37 flights4.9%
- 1–2 hours late18 flights2.4%
- 2+ hours late19 flights2.5%
Scale runs 0% to 100%.
Share of 755 completed flights by arrival against schedule.
27 of 106 late departures made up the time and arrived on time, 25% of them. 32 flights left on time and still arrived late.
The worst days
Worst days for Envoy on SEA to PHX
The latest arrival of the period was on 15 May 2026, 7 hours 59 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 May 2026 | 7 hours 59 minutes | Carrier |
| 26 June 2026 | 6 hours 34 minutes | Late-arriving aircraft |
| 13 October 2025 | 6 hours 1 minute | Late-arriving aircraft |
| 22 January 2026 | 5 hours 23 minutes | Late-arriving aircraft |
| 31 July 2026 | 5 hours 2 minutes | Late-arriving aircraft |
Delay causes
Why Envoy runs late on this route
Late-arriving aircraft accounts for 48% of the 8,261 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Late-arriving aircraft
- 36%Carrier
- 15%National Airspace System
- 1%Extreme weather
48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,261 reported delay minutes here, that single category outweighs weather by 46 to one. The split is drawn from 8,261 reported delay minutes.
The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,966 of the 8,261 delay minutes reported here.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 4.9% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,107 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg runs 87.6% on time across 761 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 760 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Envoy on SEA to PHX
Put together: treat all of this as provisional. 760 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 85.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 755 completed flights over 12 months sit behind that.
Related
Where to go next
- SEA to PHX, every carrier
- Envoy on PHX to SEA, the return leg
- American Airlines on SEA to PHX83.2%
- Delta Air Lines on SEA to PHX80.9%
- Alaska Airlines on SEA to PHX79.2%
- SkyWest Airlines on SEA to PHX78.5%
- Frontier Airlines on SEA to PHX74.5%
- Southwest Airlines on SEA to PHX65.1%
- Envoy Air network-wide record
- Seattle-Tacoma International (SEA) delay statistics
- Phoenix Sky Harbor International (PHX) delay statistics
- Why the first flight of the morning is statistically safest
- Same route, different airline: where the carrier you pick matters most
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.