AirHint found the following cheapest return flights from Washington (IAD) to Manila (MNL) in September 2025 (see full year).

Return flights

02 Sep - 09 Sep	Air China
02 Sep - 12 Sep	Air China
14 Sep - 22 Sep	Frontier Airlines
08 Sep - 29 Sep	Frontier Airlines
12 Sep - 26 Sep	Air Canada
16 Sep - 06 Oct	Air Canada
05 Sep - 20 Sep	Air Canada
12 Sep - 27 Sep	Air Canada
26 Sep - 11 Oct	Air Canada
02 Sep - 10 Sep	Etihad Airways
10 Sep - 15 Sep	Etihad Airways
02 Sep - 23 Sep	Air China
30 Sep - 27 Oct	Etihad Airways
09 Sep - 07 Oct	Etihad Airways
27 Sep - 11 Oct	Etihad Airways
28 Sep - 19 Oct	Etihad Airways
27 Sep - 25 Oct	Etihad Airways

Also check the deals for one-way flights from Washington to Manila in September.

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 Manila in September from $922

Return flights