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

Return flights

08 Dec - 17 Dec	TAP
31 Dec - 12 Jan	Icelandair
29 Dec - 12 Jan	Scandinavian Airlines
05 Dec - 09 Dec	Aer Lingus
15 Dec - 26 Dec	Aer Lingus
25 Dec - 18 Jan	Frontier Airlines
26 Dec - 10 Jan	TAP
28 Dec - 07 Jan	Aer Lingus
25 Dec - 08 Jan	Frontier Airlines
29 Dec - 12 Jan	Austrian Airlines	direct
31 Dec - 12 Jan	Austrian Airlines	direct
11 Dec - 12 Dec	Aer Lingus
16 Dec - 24 Dec	Frontier Airlines
12 Dec - 20 Dec	Frontier Airlines
17 Dec - 22 Dec	Aer Lingus
25 Dec - 18 Jan	Austrian Airlines	direct
15 Dec - 27 Dec	Aer Lingus
26 Dec - 09 Jan	Austrian Airlines	direct
26 Dec - 31 Dec	TAP
24 Dec - 31 Dec	TAP

Also check the deals for one-way flights from Washington to Vienna 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 Vienna in December from $669

Return flights