Carrier route record

MQPHX→SEA

Envoy Air · Phoenix to Seattle

Flights: 761
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 PHX to SEA earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 761 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,767 at 87.5% on time.

Set against the rest of the country, Envoy's PHX to SEA record is 10 points better than the US average of 77.3%. That gap is worth roughly 103 fewer late arrivals for every thousand flights.

On time

87.6%

Arrivals under 15 minutes late, of 756 completed flights

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

Whole route

82.2%

Every carrier on PHX to SEA, 7,202 flights

These figures cover 761 flights between September 2025 and August 2026. The median arrival is 11 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 PHX to SEA

Envoy flew 761 of the 7,202 flights on PHX to SEA, about 11% of it. Its 87.6% on time is 5 points better than the route as a whole, which runs 82.2%. Ranked by on-time rate it is first of seven carriers on the route, where the range runs from Envoy at 87.6% to Southwest at 62.2%. 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 87.5% of the time; Southwest Airlines manages 62.2%. Sample sizes sit next to every figure, because a two-point gap across 1,039 flights means less than a ten-point one.

On-time performance by carrier on PHX to SEA
Airline	Flights	On time	Avg delay	Cancelled	Grade
Envoy Air (this page)	761	87.6%	50 min	0.00%	A+
Delta Air Lines	1,767	87.5%	75 min	0.96%	A+
Alaska Airlines	2,886	84.4%	56 min	0.76%	B+
Frontier Airlinesthin sample	116	83.6%	83 min	0.00%	B+
SkyWest Airlines	409	83.0%	63 min	0.49%	B+
American Airlinesthin sample	224	82.5%	63 min	0.45%	B+
Southwest Airlines	1,039	62.2%	45 min	0.77%	D+

The spread between Delta and Southwest is 25 points, wide enough that it should decide the booking. On a hundred trips that is 25 more arrivals inside the on-time window.

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Departure window

When Envoy runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 761 flights.

5am–8am207 flights92.2%
8am–11am18 flights—
11am–2pm114 flights86.7%
2pm–5pm178 flights87.4%
5pm–8pm244 flights85.2%
8pm–5am—

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

The early departures do better, though not dramatically: 92.2% on time for the 5am–8am window against 85.2% for 5pm–8pm. Worth taking if the schedule allows, not worth an extra connection. The 5pm–8pm window is the busiest, with 244 flights scheduled in it.

Across the year

Envoy on PHX to SEA through the year

Darker means more delays. Figures are on-time percentages.February best, June worst

June is the worst month at 83.9% on time, 14 points below February, the best at 97.5%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. July was the busiest month here, with 120 flights.

Across the week, Monday is the strongest day at 91.5% on time and Sunday the weakest at 83.6%, a spread of 8 points.

Arrival by arrival

How late Envoy on PHX to SEA runs when it is late

Envoy on PHX to SEA often beats the schedule: 301 of 756 completed flights, 40%, arrived 15 minutes or more early. The 94 late arrivals split 37 under half an hour, 33 between 30 and 60 minutes, and 24 an hour or more.

15+ min early301 flights39.8%
Within 15 min361 flights47.8%
15–29 min late37 flights4.9%
30–59 min late33 flights4.4%
1–2 hours late16 flights2.1%
2+ hours late8 flights1.1%

Scale runs 0% to 100%.

Share of 756 completed flights by arrival against schedule.

29 of 107 late departures made up the time and arrived on time, 27% of them. 16 flights left on time and still arrived late.

The worst days

Worst days for Envoy on PHX to SEA

The latest arrival of the period was on 13 May 2026, 3 hours 14 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of Envoy on PHX to SEA in the period
Date	Arrived late by	Largest filed cause
13 May 2026	3 hours 14 minutes	Carrier
1 February 2026	2 hours 51 minutes	Late-arriving aircraft
22 July 2026	2 hours 38 minutes	Carrier
3 August 2026	2 hours 37 minutes	Carrier
27 May 2026	2 hours 20 minutes	Late-arriving aircraft

Delay causes

Why Envoy runs late on this route

Late-arriving aircraft accounts for 56% of the 4,679 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
56%
Carrier
27%
National Airspace System
15%
Security
1%
Extreme weather
0%

56% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,679 reported delay minutes here, that single category outweighs weather by 56 to one. The split is drawn from 4,679 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.2% on time 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 3.2% 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 85.3% on time across 760 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. 761 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 PHX to SEA

Put together: treat all of this as provisional. 761 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 87.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 756 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures