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

Return flights

11 Dec - 23 Dec	Finnair	direct
11 Dec - 16 Dec	Iberia	direct
07 Dec - 20 Dec	British Airways
29 Dec - 24 Jan	WestJet
12 Dec - 16 Dec	WestJet
02 Dec - 09 Dec	jetBlue
04 Dec - 10 Dec	WestJet
01 Dec - 12 Dec	WestJet
05 Dec - 12 Dec	WestJet
11 Dec - 10 Jan	jetBlue
12 Dec - 24 Dec	jetBlue
01 Dec - 12 Dec	American Airlines	direct
28 Dec - 11 Jan	WestJet
29 Dec - 24 Jan	British Airways	direct
13 Dec - 13 Jan	WestJet
11 Dec - 10 Jan	American Airlines	direct
27 Dec - 07 Jan	jetBlue
28 Dec - 01 Jan	WestJet
20 Dec - 14 Jan	Sun Country Airlines
28 Dec - 11 Jan	British Airways	direct

Also check the deals for one-way flights from Phoenix 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 Phoenix to London in December from $564

Return flights