AirHint found the following cheapest return flights from Washington (IAD) to Delhi (DEL) in December 2025 (see full year).

Return flights

02 Dec - 13 Dec	Air India	direct
02 Dec - 20 Jan	Delta
02 Dec - 20 Jan	Air India	direct
23 Dec - 20 Jan	British Airways
30 Dec - 08 Jan	Delta
13 Dec - 12 Jan	EgyptAir
24 Dec - 05 Jan	Air Canada
23 Dec - 05 Jan	Air Canada
28 Dec - 06 Jan	Delta
27 Dec - 06 Jan	Delta
27 Dec - 06 Jan	Air India	direct
12 Dec - 30 Dec	Lufthansa
23 Dec - 30 Dec	Air India	direct
13 Dec - 31 Dec	Ethiopian Airlines
12 Dec - 30 Dec	Air India	direct

Also check the deals for one-way flights from Washington to Delhi in December.

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 Delhi in December from $778

Return flights