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

Return flights

05 Dec - 20 Dec	IndiGo
30 Dec - 31 Jan	Lufthansa
05 Dec - 30 Dec	Delta
31 Dec - 14 Jan	Etihad Airways
28 Dec - 31 Jan	Lufthansa
27 Dec - 31 Jan	Lufthansa
09 Dec - 30 Dec	Delta
30 Dec - 15 Jan	Lufthansa
09 Dec - 13 Jan	Lufthansa
04 Dec - 08 Jan	IndiGo
28 Dec - 18 Jan	Lufthansa
02 Dec - 09 Jan	Virgin Atlantic
02 Dec - 07 Jan	Virgin Atlantic
25 Dec - 28 Dec	TAP
18 Dec - 31 Dec	Delta
20 Dec - 31 Dec	Delta

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 657€

Return flights