Route · PHX → SEA · 2020–2025 BTS data
Phoenix to Seattle
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PHX to SEA (Phoenix to Seattle) ranks #39 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 84.3%
- On-time
- +5.3 pts
- vs US avg
- 63 min
- Delay when late
- 38,561
- Flights
- #39 of 4927
- Corpus placement
Cancelled
0.6%
Best Month
Oct 2024 90%
Worst Month
Jul 2024 69%
Distance
1,107 mi
Carriers
43
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 627 | 142 | 3 | 2 | DL,WN,F9,AS,AA,MQ,OO |
| Nov 2025 | 594 | 113 | 6 | 0 | OO,DL,F9,MQ,AA,AS,WN |
| Oct 2025 | 600 | 117 | 3 | 1 | AA,AS,DL,OO,WN,F9,MQ |
| Sep 2025 | 544 | 83 | 3 | 2 | MQ,WN,OO,DL,F9,AS |
| Aug 2025 | 584 | 115 | 3 | 0 | AA,OO,WN,F9,MQ,AS,DL |
| Jul 2025 | 621 | 110 | 3 | 0 | AA,AS,OO,WN,DL,F9,MQ |
| Jun 2025 | 618 | 141 | 1 | 1 | AA,AS,DL,OO,WN,F9,MQ |
| May 2025 | 653 | 115 | 3 | 0 | AS,DL,OO,WN,F9 |
| Apr 2025 | 665 | 97 | 0 | 0 | DL,F9,OO,WN,AS |
| Mar 2025 | 684 | 136 | 2 | 1 | AS,DL,OO,WN,F9,MQ |
| Feb 2025 | 572 | 109 | 6 | 0 | AS,DL,OO,WN,F9,MQ |
| Jan 2025 | 599 | 80 | 0 | 0 | AS,OO,WN,DL,F9,MQ |
| Dec 2024 | 608 | 109 | 3 | 0 | AA,AS,DL,F9,OO,WN |
| Nov 2024 | 579 | 88 | 0 | 0 | OO,MQ,WN,AS,DL,F9 |
| Oct 2024 | 597 | 60 | 0 | 0 | MQ,AS,OO,WN,DL,F9 |
| Sep 2024 | 569 | 108 | 1 | 0 | WN,OO,AS,DL,F9,MQ |
| Aug 2024 | 587 | 142 | 3 | 2 | AS,DL,F9,MQ,WN,OO |
| Jul 2024 | 613 | 190 | 10 | 1 | AA,AS,DL,F9,MQ,OO,WN |
| Jun 2024 | 594 | 148 | 1 | 1 | AA,AS,DL,F9,MQ,OO,WN |
| May 2024 | 609 | 120 | 1 | 2 | AS,DL,F9,MQ,OO,WN |
| Apr 2024 | 634 | 101 | 2 | 2 | AS,DL,F9,MQ,OO,WN |
| Mar 2024 | 670 | 96 | 1 | 0 | AS,DL,F9,MQ,OO,WN |
| Feb 2024 | 566 | 61 | 0 | 2 | AS,DL,F9,MQ,OO,WN |
| Jan 2024 | 535 | 110 | 35 | 1 | AA,AS,DL,F9,MQ,WN,OO |
PHX–SEA seasonal on-time pattern
Best: September (86.7%) · weakest: July (80.4%)
Strongest calendar month
September
86.7% on-time · ~519 flights/mo
Busiest calendar month
March
~613 flights/mo avg
Weakest calendar month
July
80.4% on-time · ~527 flights/mo
Cancellation Rate
0.6%
90 of 14,522 flights
Diversion Rate
0.1%
18 of 14,522 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PHX - Phoenix
Full on-time, delay-cause, and seasonal performance for Phoenix, AZ.
PHX on-time profileSEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
SEA on-time profileCompare the two airports
See PHX and SEA side by side on delays, cancellations, and reliability.
Compare PHX vs SEAOrigin-hub reliability standing
Mid-pack among PHX departures
From PHX, this corridor sits with 71 other 75–85% on-time routes out of 97 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Seattle · fleet on-time rank #1480 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PHX–SEA.
Routes with a similar on-time rate
What the Data Says About PHX to SEA
Bureau of Transportation Statistics records show Phoenix to Seattle (PHX to SEA) running a 84.3% on-time rate over 38,561 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 63.3 minutes. The 1,107-mile corridor is served by 43 carriers, and over the last 24 months 0.6% of 14,522 flights were cancelled, 0.1% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 90% on-time, while Jul 2024 came in at just 69% - a 21-point swing worth factoring into travel timing.
On the multi-year calendar, PHX–SEA peaks in September at 86.7% on-time while March carries the heaviest traffic (~613 flights per month) ; the softest month is July at 80.4%, a 6.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PHX to SEA rank among US routes by traffic? ▼
How often are flights delayed from PHX to SEA? ▼
What is the cancellation rate for PHX to SEA? ▼
How far is the flight from PHX to SEA? ▼
When is the best time to fly from PHX to SEA? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using PHX–SEA data
PHX–SEA runs 5.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare PHX and SEA airport profiles: delay causes and top routes differ even on the same corridor. PHX airport
- If your dates flex, September (86.7% on-time) beats July (80.4%) on this corridor. Seasonal chart
- 4 other routes post a similar 84.3% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.