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Route Reliability

Seattle → Phoenix

SEA–PHX · 1,107 miles · Seattle–Tacoma International Airport to Phoenix Sky Harbor International Airport

84
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
5 min
Average arrival delay
0.7%
Cancelled
7,317
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines84%1,765 flights
  2. 2.American Airlines84%1,396 flights
  3. 3.Alaska Airlines79%2,930 flights
  4. 4.Frontier Airlines72%191 flights
  5. 5.Southwest Airlines72%1,035 flights

What the data says

Morning flights do better here.

SEA–PHX flights departing between 3–6 AM arrived on time 95% of the time, versus 68% between 9 PM–12 AM.

Monday is the weak spot.

SEA–PHX flights arrived on time 84% of the time on Tuesdays. On Mondays: 77%.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 84% of the time on this route; Southwest Airlines managed 72%.

Ticking up lately.

SEA–PHX flights arrived on time 84% of the time over the last three months in the data, compared with 81% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon77%(1072 flights)
  • Tue84%(992 flights)
  • Wed83%(1010 flights)
  • Thu77%(1066 flights)
  • Fri79%(1046 flights)
  • Sat83%(985 flights)
  • Sun78%(1069 flights)
On-time by departure window
  • 3–6 AM95%(150 flights)
  • 6–9 AM92%(1503 flights)
  • 9 AM–12 PM78%(1909 flights)
  • 12–3 PM79%(920 flights)
  • 3–6 PM74%(1409 flights)
  • 6–9 PM75%(1283 flights)
  • 9 PM–12 AM68%(66 flights)
On-time trend by month
84%
May

Jun 77% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%615
July 202574%617
August 202577%576
September 202585%533
October 202580%595
November 202571%584
December 202574%626
January 202683%580
February 202686%562
March 202681%668
April 202687%664
May 202684%620

Same trip, other airports

Keep nerding

Based on 7,317 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.