Cheapest return flights from Philadelphia to London in March from $657

AirHint found the following cheapest return flights from Philadelphia (PHL) to London (LHR) in March 2026 (see full year).

Return flights

18 Mar - 25 Mar jetBlue
03 Mar - 10 Mar jetBlue
04 Mar - 09 Mar jetBlue
17 Mar - 15 Apr jetBlue
17 Mar - 14 Apr jetBlue
25 Mar - 01 Apr jetBlue
24 Mar - 02 Apr jetBlue
31 Mar - 07 Apr jetBlue
09 Mar - 24 Mar jetBlue
04 Mar - 10 Mar jetBlue
30 Mar - 07 Apr jetBlue
03 Mar - 31 Mar jetBlue
10 Mar - 17 Mar jetBlue
29 Mar - 06 Apr Finnair
29 Mar - 07 Apr Finnair
24 Mar - 06 Apr jetBlue
04 Mar - 11 Mar jetBlue
17 Mar - 15 Apr Finnair direct
03 Mar - 08 Mar jetBlue
05 Mar - 09 Mar jetBlue

Also check the deals for one-way flights from Philadelphia to London in March.

Powered by

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

Feel free to contact us with any feedback or request another flight research.