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

Return flights

06 Dec - 13 Dec	jetBlue
12 Dec - 14 Jan	jetBlue
12 Dec - 09 Jan	Virgin Atlantic
05 Dec - 12 Dec	British Airways	direct
11 Dec - 08 Jan	jetBlue
01 Dec - 08 Dec	British Airways
04 Dec - 11 Dec	Delta
10 Dec - 15 Dec	Delta
07 Dec - 14 Dec	Delta
09 Dec - 16 Dec	British Airways
12 Dec - 11 Jan	Delta
29 Dec - 24 Jan	Air Canada
31 Dec - 07 Jan	British Airways
24 Dec - 09 Jan	Air France
11 Dec - 18 Dec	British Airways
10 Dec - 15 Dec	Finnair	direct
25 Dec - 17 Jan	Iberia
17 Dec - 24 Dec	British Airways
26 Dec - 17 Jan	Virgin Atlantic
30 Dec - 04 Jan	United

Also check the deals for one-way flights from Pittsburgh 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 Pittsburgh to London in December from 519€

Return flights