Phoenix (PHX) → Seattle (SEA)

Phoenix Sky Harbor International Airport to Seattle–Tacoma International Airport · 962 nm (1,782 km) · about 2.5 h nonstop

Cheapest economy fares, checked daily · 43 days of history

Written and maintained by Jake McEwen
Great-circle route from Phoenix (PHX) to Seattle (SEA)
PHXSEA

Booking links are plain searches — none are affiliate links, and the site earns nothing if you book. Prices are the cheapest fares other travellers recently found, not live availability — always confirm the fare before you pay.

Economy

last checked 9h ago
$119one-way

Frontier Airlines · 1 stop · 12h 49m · travel Dec 11 · sold via Tickets

Book on Aviasales· $119 ↗Compare on Google Flights ↗Compare on Skyscanner ↗
Lowest (90d)
$84
Typical (median)
$98
Highest (90d)
$190
Checks
52
Cheapest fare seen at each daily check over the last 90 days. Green dots are checks that qualified as a deal.

When it's cheapest to travel

Travel dates of the cheapest fare found at each of our 52 daily checks — where the low fares were, not every date.

Lowest fare by travel month
Sep 2026$1306×
Oct 2026$1853×
Nov 2026$9021×
Dec 2026$8416×
May 2027$1666×
Typical fare by day of travel
Thucheapest$8714×
Fri$9211×
Sat$1303×
Sun$1362×
Wed$16320×
Mon$1852×
CheckedFareAirlineStopsTravelSold via
2026-10-28$119Frontier Airlines1 stopDec 11TicketsBook ↗
2026-10-27$90Frontier Airlines1 stopNov 26Mytrip.comBook ↗
2026-10-26$90Frontier Airlines1 stopNov 26Mytrip.comBook ↗
2026-10-25$90Frontier Airlines1 stopNov 26Mytrip.comBook ↗
2026-10-24$90Frontier Airlines1 stopNov 26Mytrip.comBook ↗
2026-10-23$90Frontier Airlines1 stopNov 26Mytrip.comBook ↗
2026-10-21$90Frontier Airlines1 stopNov 26Mytrip.comBook ↗
2026-10-21$90Frontier Airlines1 stopNov 26Mytrip.comBook ↗
2026-10-20$98Frontier Airlines1 stopNov 25FlightnetworkBook ↗
2026-10-19$98Frontier Airlines1 stopNov 25—Book ↗
2026-10-19$98Frontier Airlines1 stopNov 25—Book ↗
2026-10-18$98Frontier Airlines1 stopNov 25—Book ↗

Airlines selling the cheapest fares

Which carrier had the lowest fare on each of our checks over the last 90 days.

  • Frontier Airlines ×39
  • Southwest Airlines ×7
  • Alaska Airlines ×6

About this route

Phoenix (PHX) to Seattle (SEA) is one of the busiest air routes in its market (US domestic). It links Phoenix Sky Harbor International Airport in United States with Seattle–Tacoma International Airport in United States. The great-circle distance is about 962 nautical miles (1,107 statute miles), so expect roughly 2.5 hours in the air nonstop.

Every night we ask our fare provider for the cheapest one-way economy fare other travellers recently found on this route and record it, with the airline and the seller it was found with. A fare is flagged as a deal when it falls at least 30% below the route's 90-day typical price. Prices are a research starting point, not live availability — the booking links open the itinerary so you can confirm what's on sale right now.

Fares are approximate, from public sources, and can be stale — always verify before booking.