AirHint found the following cheapest return flights from New Orleans (MSY) to London (LHR) in December 2025 (see full year).

Return flights

03 Dec - 10 Dec	jetBlue
04 Dec - 11 Dec	Spirit Airlines
09 Dec - 16 Dec	Delta
09 Dec - 17 Dec	Delta
04 Dec - 08 Dec	Spirit Airlines
09 Dec - 18 Dec	KLM
09 Dec - 19 Dec	KLM
08 Dec - 15 Dec	Delta
09 Dec - 15 Dec	Delta
06 Dec - 11 Dec	Spirit Airlines
30 Dec - 07 Jan	Delta
31 Dec - 07 Jan	British Airways
22 Dec - 17 Jan	Air Canada
25 Dec - 17 Jan	British Airways
27 Dec - 17 Jan	Iberia
26 Dec - 06 Jan	Spirit Airlines
28 Dec - 05 Jan	Frontier Airlines
22 Dec - 03 Jan	Air Canada
22 Dec - 04 Jan	Air Canada
26 Dec - 05 Jan	Spirit Airlines

Also check the deals for one-way flights from New Orleans to London in December.

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 New Orleans to London in December from 551€

Return flights