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

Return flights

04 Mar - 14 Mar	Icelandair
06 Mar - 14 Mar	Icelandair
04 Mar - 17 Mar	Icelandair
06 Mar - 15 Mar	Finnair
11 Mar - 22 Mar	Finnair
16 Mar - 22 Mar	Finnair
05 Mar - 15 Mar	Finnair
03 Mar - 08 Mar	Spirit Airlines
15 Mar - 22 Mar	Air Canada
14 Mar - 22 Mar	Air Canada
29 Mar - 12 Apr	Finnair	direct
26 Mar - 16 Apr	Finnair	direct

Also check the deals for one-way flights from Miami 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 Miami to London in March from $495

Return flights