AirHint found the following cheapest return flights from London (LHR) to Zagreb (ZAG) in April 2026 (see full year).

Return flights

15 Apr - 22 Apr	British Airways	direct
01 Apr - 08 Apr	British Airways	direct
17 Apr - 20 Apr	Croatia Airlines	direct
17 Apr - 27 Apr	Croatia Airlines	direct
24 Apr - 27 Apr	Croatia Airlines	direct
01 Apr - 03 Apr	British Airways	direct
25 Apr - 02 May	British Airways	direct
01 Apr - 05 Apr	British Airways
03 Apr - 07 Apr	Austrian Airlines
03 Apr - 05 Apr	Austrian Airlines
02 Apr - 06 Apr	LOT

Also check the deals for one-way flights from London to Zagreb in April.

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 London to Zagreb in April from 126€

Return flights