AirHint found the following cheapest return flights from Chicago (ORD) to Brussels (BRU) in July 2025 (see full year).

Return flights

15 Jul - 18 Aug	KLM
29 Jul - 05 Aug	United	direct
27 Jul - 03 Aug	United
25 Jul - 01 Aug	United
31 Jul - 07 Aug	United
22 Jul - 28 Jul	Spirit Airlines
08 Jul - 15 Jul	jetBlue
20 Jul - 28 Jul	Spirit Airlines
09 Jul - 23 Jul	Turkish Airlines
07 Jul - 14 Jul	Turkish Airlines
09 Jul - 24 Jul	Spirit Airlines
23 Jul - 30 Jul	United
20 Jul - 28 Jul	United	direct
09 Jul - 24 Jul	United	direct
14 Jul - 21 Jul	United	direct

Also check the deals for one-way flights from Chicago to Brussels in July.

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 Brussels in July from 651€

Return flights