Cheapest one-way flights from Portland to Singapore in July from $426

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

AirHint found the following cheapest one-way flights from Portland (PDX) to Singapore (SIN) in July 2025 (see full year).

One-Way flights

30 Jul Japan Airlines
29 Jul Air Canada
31 Jul Air Canada
06 Jul United
01 Jul Delta

Also check the deals for return flights from Portland to Singapore in July.

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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