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

Return flights

27 Aug - 04 Sep	Cathay Pacific
18 Aug - 01 Sep	Cathay Pacific
18 Aug - 23 Aug	Air India
12 Aug - 19 Aug	Spirit Airlines
21 Aug - 26 Aug	IndiGo
23 Aug - 30 Aug	IndiGo
23 Aug - 31 Aug	Spirit Airlines
03 Aug - 29 Aug	Cathay Pacific
08 Aug - 22 Aug	Cathay Pacific
14 Aug - 24 Aug	United
03 Aug - 08 Aug	Delta

Also check the deals for one-way flights from Chicago to Singapore in August.

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.

Book a cheap hotel in Singapore

Cheap car rent in Singapore

Cheapest return flights from Chicago to Singapore in August from $706

Return flights