Phoenix to Seattle in September 2026

Dated one-way fares from Phoenix to Seattle in September 2026. Use the calendar to see which days are cheaper.

Lowest this month $118

Highest this month $168

Sample fare $118

Airports PHX–SEA

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September 2026 price calendar

From $118 · up to $168

Mon

Tue

Wed

Thu

Fri

Sat

Sun

2 $168 3 $143 4 $143 5 $143 6 $143 7 $143 8 $143 9 $143 10 $143 11 $143 12 $143 13 $143 14 $143 15 $143 16 $143 17 $143 18 $143 19 $143 20 $143 21 $143 22 $143 23 $143 24 $143 25 $143 26 $143 27 $143 28 $118

Seattle SEA

$118

Sep 28, 8:00am · 10h 28m · 1 stop

PHX → SEA · Frontier Airlines

This page is only September 2026 on the Phoenix to Seattle route. Open the full route if you want the next months side by side.

Prices move as seats sell. Confirm the live itinerary before you book Phoenix to Seattle in September 2026.