AirHint found the following cheapest return flights from Lisbon (LIS) to Colombo (CMB) in September 2025 (see full year).

Return flights

30 Sep - 11 Oct	Ryanair
01 Sep - 30 Sep	Ryanair
19 Sep - 28 Sep	easyJet
12 Sep - 28 Sep	Ryanair
04 Sep - 17 Sep	Ryanair
23 Sep - 26 Sep	Ryanair
27 Sep - 10 Oct	Wizz Air Malta
07 Sep - 16 Oct	Ryanair
10 Sep - 25 Sep	easyJet
05 Sep - 13 Sep	easyJet
02 Sep - 15 Sep	easyJet
05 Sep - 12 Sep	Ryanair
06 Sep - 21 Sep	Ryanair
30 Sep - 15 Oct	Ryanair
24 Sep - 09 Oct	Wizz Air Malta

Also check the deals for one-way flights from Lisbon to Colombo in September.

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 Lisbon to Colombo in September from 566€

Return flights