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

Return flights

02 Dec - 10 Dec	Frontier Airlines
08 Dec - 24 Dec	Delta
08 Dec - 18 Dec	Delta
08 Dec - 16 Dec	Delta
10 Dec - 18 Dec	Delta
04 Dec - 12 Dec	Delta
11 Dec - 18 Dec	Delta
23 Dec - 17 Jan	Frontier Airlines
18 Dec - 08 Jan	Frontier Airlines
03 Dec - 11 Dec	Delta
03 Dec - 12 Dec	Delta
02 Dec - 16 Dec	Delta
27 Dec - 09 Jan	Delta
24 Dec - 06 Jan	Frontier Airlines
17 Dec - 10 Jan	Porter Airlines (Canada) Ltd
24 Dec - 07 Jan	Delta
19 Dec - 09 Jan	Delta
15 Dec - 10 Jan	Air France
19 Dec - 01 Jan	Delta
21 Dec - 02 Jan	Delta

Also check the deals for one-way flights from Chicago 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 Chicago to Vienna in December from 554€

Return flights