Cheapest one-way flights from Seattle to Phoenix in April from $26

Best time to book flights for Seattle (SEA) to Phoenix (PHX) flights at AirHint

AirHint found the following cheapest one-way flights from Seattle (SEA) to Phoenix (PHX) in April 2025 (see full year).

One-Way flights

15 Apr Frontier Airlines direct
07 Apr Frontier Airlines direct
21 Apr Frontier Airlines direct
28 Apr Frontier Airlines direct
29 Apr Alaska Airlines direct
06 Apr Frontier Airlines direct
12 Apr Frontier Airlines direct
11 Apr Frontier Airlines direct
30 Apr Sun Country Airlines

Also check the deals for return flights from Seattle to Phoenix in April.

Skyscanner

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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