AirHint found the following cheapest return flights from Kansas City (MCI) to London (LGW) in December 2025 (see full year).

Return flights

02 Dec - 11 Dec	Spirit Airlines
23 Dec - 17 Jan	Frontier Airlines
04 Dec - 27 Dec	Spirit Airlines
11 Dec - 17 Dec	Spirit Airlines
27 Dec - 17 Jan	Air Canada
23 Dec - 01 Jan	Frontier Airlines
20 Dec - 03 Jan	Frontier Airlines
18 Dec - 04 Jan	Spirit Airlines
22 Dec - 30 Dec	Alaska Airlines
15 Dec - 06 Jan	Turkish Airlines
15 Dec - 07 Jan	Turkish Airlines

Also check the deals for one-way flights from Kansas City 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 Kansas City to London in December from $826

Return flights