AirHint found the following cheapest return flights from Washington (IAD) to Brussels (BRU) in January 2026 (see full year).

Return flights

21 Jan - 28 Jan	Aer Lingus
27 Jan - 05 Feb	Aer Lingus
28 Jan - 05 Feb	Aer Lingus
22 Jan - 29 Jan	TAP
31 Jan - 06 Feb	Aer Lingus
18 Jan - 27 Jan	Aer Lingus
30 Jan - 02 Feb	Turkish Airlines
28 Jan - 05 Feb	Brussels Airlines	direct
27 Jan - 05 Feb	Brussels Airlines	direct
30 Jan - 02 Feb	Brussels Airlines	direct
18 Jan - 27 Jan	United	direct
21 Jan - 28 Jan	Brussels Airlines	direct
22 Jan - 29 Jan	Brussels Airlines	direct

Also check the deals for one-way flights from Washington to Brussels in January.

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 Brussels in January from 393€

Return flights