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

Return flights

14 Jul - 21 Jul	Cathay Pacific
10 Jul - 07 Aug	Cathay Pacific
25 Jul - 29 Jul	Cathay Pacific
30 Jul - 01 Aug	Cathay Pacific
19 Jul - 09 Aug	Cathay Pacific
13 Jul - 09 Aug	Cathay Pacific
25 Jul - 02 Aug	Cathay Pacific
27 Jul - 01 Aug	Delta
27 Jul - 03 Aug	Delta

Also check the deals for one-way flights from Chicago to Singapore 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 Singapore in July from $1021

Return flights