AirHint found the following cheapest return flights from Houston (HOU) to Waterloo (YKF) in August 2025 (see full year).

Return flights

06 Aug - 13 Aug	Spirit Airlines
14 Aug - 18 Aug	WestJet
12 Aug - 20 Aug	WestJet
26 Aug - 11 Sep	WestJet
20 Aug - 27 Aug	WestJet
12 Aug - 18 Aug	WestJet
25 Aug - 15 Sep	WestJet
28 Aug - 31 Aug	WestJet
22 Aug - 26 Aug	WestJet
11 Aug - 25 Aug	WestJet
11 Aug - 16 Aug	WestJet
01 Aug - 04 Aug	WestJet
09 Aug - 06 Sep	WestJet
29 Aug - 01 Sep	WestJet

Also check the deals for one-way flights from Houston to Waterloo 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.

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Cheapest return flights from Houston to Waterloo in August from $329

Return flights