AirHint found the following cheapest return flights from Cologne (CGN) to Helsinki (HEL) in July 2025 (see full year).

Return flights

09 Jul - 30 Jul	Eurowings
27 Jul - 03 Aug	Lufthansa
17 Jul - 28 Jul	Eurowings
24 Jul - 27 Jul	Lufthansa
25 Jul - 27 Jul	Lufthansa
28 Jul - 03 Aug	Lufthansa
27 Jul - 04 Aug	Lufthansa
17 Jul - 03 Aug	Eurowings
22 Jul - 27 Jul	Ryanair
26 Jul - 04 Aug	Ryanair
17 Jul - 20 Jul	Eurowings
18 Jul - 22 Jul	Lufthansa
21 Jul - 30 Jul	Eurowings
12 Jul - 15 Jul	Ryanair
14 Jul - 17 Jul	Ryanair

Also check the deals for one-way flights from Cologne to Helsinki 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 Cologne to Helsinki in July from $357

Return flights