AirHint found the following cheapest return flights from Washington (DCA) to Islamabad (ISB) in December 2025 (see full year).

Return flights

31 Dec - 20 Jan	jetBlue
30 Dec - 28 Jan	Qatar Airways
31 Dec - 31 Jan	Qatar Airways
31 Dec - 25 Jan	Qatar Airways
31 Dec - 22 Jan	Qatar Airways
01 Dec - 21 Dec	Qatar Airways
31 Dec - 30 Jan	Qatar Airways
29 Dec - 29 Jan	Qatar Airways
25 Dec - 27 Jan	Gulf Air
09 Dec - 29 Jan	jetBlue
05 Dec - 22 Jan	jetBlue
08 Dec - 26 Dec	Air Canada
06 Dec - 17 Dec	Emirates
09 Dec - 24 Dec	Qatar Airways
23 Dec - 30 Dec	jetBlue
21 Dec - 31 Dec	jetBlue
11 Dec - 28 Dec	Qatar Airways
20 Dec - 31 Dec	British Airways
21 Dec - 28 Dec	Qatar Airways
24 Dec - 31 Dec	Qatar Airways

Also check the deals for one-way flights from Washington to Islamabad 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 Islamabad in December from $1312

Return flights