AirHint found the following cheapest return flights from Las Vegas (LAS) to London (LHR) in March 2026 (see full year).

Return flights

23 Mar - 30 Mar	Air Canada
02 Mar - 09 Mar	British Airways
29 Mar - 10 Apr	Air Canada
21 Mar - 30 Mar	Air Canada
29 Mar - 10 Apr	British Airways	direct
05 Mar - 09 Mar	Air Canada
27 Mar - 31 Mar	British Airways
16 Mar - 23 Mar	British Airways
20 Mar - 30 Mar	Air Canada
05 Mar - 14 Mar	Spirit Airlines
26 Mar - 02 Apr	Air Canada
22 Mar - 05 Apr	Air Canada
06 Mar - 14 Mar	Delta
13 Mar - 17 Mar	Delta
23 Mar - 05 Apr	British Airways
22 Mar - 05 Apr	Finnair	direct
23 Mar - 05 Apr	Finnair	direct
26 Mar - 02 Apr	Iberia	direct

Also check the deals for one-way flights from Las Vegas to London 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 Las Vegas to London in March from 488€

Return flights