Cheapest return flights from Knoxville to London in December from 506€

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

Return flights

01 Dec - 08 Dec Virgin Atlantic
04 Dec - 12 Dec Delta
25 Dec - 08 Jan Allegiant Air
25 Dec - 05 Jan Allegiant Air
25 Dec - 01 Jan Allegiant Air
26 Dec - 07 Jan Allegiant Air
29 Dec - 06 Jan United
29 Dec - 03 Jan Allegiant Air

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

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