AirHint found the following cheapest return flights from London (STN) to Grenoble (GNB) in March 2026 (see full year).

Return flights

01 Mar - 08 Mar	Ryanair	direct
22 Mar - 26 Mar	Ryanair	direct
21 Mar - 26 Mar	Ryanair	direct
19 Mar - 22 Mar	Ryanair	direct
15 Mar - 21 Mar	Ryanair	direct
15 Mar - 26 Mar	Ryanair	direct
15 Mar - 22 Mar	Ryanair	direct
05 Mar - 21 Mar	Ryanair	direct
05 Mar - 22 Mar	Ryanair	direct
01 Mar - 21 Mar	Ryanair	direct
28 Mar - 05 Apr	Ryanair
26 Mar - 04 Apr	Ryanair
28 Mar - 04 Apr	Ryanair
27 Mar - 04 Apr	Ryanair

Also check the deals for one-way flights from London to Grenoble 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 London to Grenoble in March from 49€

Return flights