AirHint found the following cheapest return flights from Waterloo (YKF) to Keflavik (KEF) in July 2025 (see full year).

Return flights

31 Jul - 03 Aug	WestJet
29 Jul - 31 Jul	WestJet
31 Jul - 05 Aug	WestJet
25 Jul - 03 Aug	WestJet
24 Jul - 09 Aug	WestJet
27 Jul - 02 Aug	WestJet
24 Jul - 30 Jul	WestJet
28 Jul - 30 Jul	WestJet
31 Jul - 02 Aug	WestJet
23 Jul - 30 Jul	WestJet
22 Jul - 31 Jul	WestJet
24 Jul - 31 Jul	WestJet
21 Jul - 28 Jul	WestJet
28 Jul - 31 Jul	WestJet
24 Jul - 04 Aug	WestJet
30 Jul - 06 Aug	WestJet
30 Jul - 01 Aug	WestJet
28 Jul - 04 Aug	WestJet
19 Jul - 25 Jul	WestJet
20 Jul - 27 Jul	WestJet

Also check the deals for one-way flights from Waterloo to Keflavik 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 Waterloo to Keflavik in July from $1123

Return flights