AirHint found the following cheapest one-way flights from Phoenix (PHX) to Seattle (SEA) in May 2026 (see full year).
One-Way flights
| 12 May | Alaska Airlines | direct | |
| 10 May | Alaska Airlines | direct | |
| 17 May | Alaska Airlines | direct | |
| 23 May | Alaska Airlines | ||
| 23 May | Alaska Airlines | direct | |
| 29 May | Sun Country Airlines | ||
| 22 May | Delta | direct |
Also check the deals for return flights from Phoenix to Seattle in May.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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