FFL Helper
Seattle SEA
$118
PHX → SEA · Frontier Airlines
FFL Helper / Phoenix / Seattle / August 2026
PHX → SEA · 2026-08
Phoenix to Seattle in August 2026
Dated one-way fares from Phoenix to Seattle in August 2026. Use the calendar to see which days are cheaper.
Lowest this month
$173
Highest this month
$173
Sample fare
$118
Airports
PHX–SEA
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Other months: August 2026 · September 2026 · October 2026 · Full route
August 2026 price calendar
August 2026
From $173
Mon
Tue
Wed
Thu
Fri
Sat
Sun
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8
9
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12
13
14
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20
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$173
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31
Dated fares
Booking PHX to SEA in August 2026
This page is only August 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 August 2026.