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

Return flights

09 Dec - 16 Dec	British Airways
04 Dec - 08 Dec	Air Canada
12 Dec - 19 Dec	British Airways
04 Dec - 11 Dec	British Airways
12 Dec - 22 Dec	British Airways
14 Dec - 22 Dec	British Airways
14 Dec - 21 Dec	British Airways
22 Dec - 29 Dec	jetBlue
24 Dec - 31 Dec	British Airways	direct
22 Dec - 29 Dec	American Airlines	direct

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Pittsburgh to London in December from $537

Return flights