AirHint found the following cheapest return flights from Washington (IAD) to Singapore (SIN) in November 2025 (see full year).

Return flights

15 Nov - 27 Nov	Singapore Airlines
17 Nov - 27 Nov	Singapore Airlines
04 Nov - 13 Nov	Turkish Airlines
03 Nov - 18 Dec	Turkish Airlines
08 Nov - 22 Nov	Etihad Airways
14 Nov - 29 Nov	Turkish Airlines
20 Nov - 30 Nov	Turkish Airlines

Also check the deals for one-way flights from Washington to Singapore in November.

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 Washington to Singapore in November from $914

Return flights