Cheapest one-way flights from Washington to Singapore in October from $673

Best time to book flights for Washington (DCA) to Singapore (SIN) flights at AirHint

AirHint found the following cheapest one-way flights from Washington (DCA) to Singapore (SIN) in October 2025 (see full year).

One-Way flights

16 Oct United
20 Oct United

Also check the deals for return flights from Washington to Singapore in October.

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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