Cheapest return flights from Portland to Singapore in May from $1016

Best time to book flights for Portland (PDX) to Singapore (SIN) flights at AirHint

AirHint found the following cheapest return flights from Portland (PDX) to Singapore (SIN) in May 2025 (see full year).

Return flights

05 May - 16 May United
02 May - 11 May United
26 May - 09 Jun Alaska Airlines

Also check the deals for one-way flights from Portland to Singapore in May.

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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