AirHint found the following cheapest return flights from Portland (PDX) to Los Angeles (LAX) in March 2026 (see full year).

Return flights

07 Mar - 14 Mar	Frontier Airlines	direct
06 Mar - 09 Mar	Frontier Airlines	direct
04 Mar - 14 Mar	Alaska Airlines
02 Mar - 10 Mar	Delta	direct
05 Mar - 08 Mar	Delta	direct
17 Mar - 18 Mar	Alaska Airlines
11 Mar - 25 Mar	Frontier Airlines
17 Mar - 17 Mar	Alaska Airlines
17 Mar - 17 Mar	Delta	direct
17 Mar - 18 Mar	Delta	direct

Also check the deals for one-way flights from Portland to Los Angeles in March.

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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Cheapest return flights from Portland to Los Angeles in March from 91€

Return flights