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

Return flights

07 Mar - 13 Mar	WestJet
11 Mar - 18 Mar	jetBlue
16 Mar - 30 Mar	jetBlue
12 Mar - 22 Mar	WestJet
19 Mar - 02 Apr	jetBlue
20 Mar - 31 Mar	WestJet
16 Mar - 30 Mar	British Airways	direct
20 Mar - 31 Mar	American Airlines	direct
06 Mar - 13 Mar	United
19 Mar - 02 Apr	British Airways	direct
12 Mar - 22 Mar	American Airlines	direct
22 Mar - 28 Mar	WestJet

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

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 March from $734

Return flights