AirHint found the following cheapest return flights from Denver (DEN) to Ljubljana (LJU) in March 2026 (see full year).

Return flights

05 Mar - 12 Mar	Icelandair
18 Mar - 25 Mar	Lufthansa
23 Mar - 30 Mar	Air Canada
09 Mar - 16 Mar	Frontier Airlines
16 Mar - 23 Mar	Lufthansa
29 Mar - 05 Apr	Air Canada
12 Mar - 19 Mar	Turkish Airlines
19 Mar - 26 Mar	Turkish Airlines
26 Mar - 02 Apr	Turkish Airlines
31 Mar - 07 Apr	Turkish Airlines
01 Mar - 08 Mar	Frontier Airlines
04 Mar - 11 Mar	Air Canada
11 Mar - 18 Mar	Frontier Airlines
25 Mar - 01 Apr	Air Canada
30 Mar - 06 Apr	Air Canada
28 Mar - 04 Apr	Turkish Airlines

Also check the deals for one-way flights from Denver to Ljubljana in March.

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 Denver to Ljubljana in March from 651€

Return flights