AirHint found the following cheapest return flights from St. Louis (STL) to London (LHR) in June 2026 (see full year).

Return flights

10 Jun - 17 Jun	Air Canada
03 Jun - 14 Jun	Air Canada
07 Jun - 14 Jun	Air Canada
01 Jun - 13 Jun	Air Canada
17 Jun - 13 Jul	Lufthansa
02 Jun - 29 Jun	Aer Lingus
03 Jun - 30 Jun	Aer Lingus
21 Jun - 12 Jul	Lufthansa
09 Jun - 30 Jun	WestJet
08 Jun - 29 Jun	WestJet
23 Jun - 01 Jul	Lufthansa
23 Jun - 01 Jul	British Airways	direct
24 Jun - 02 Jul	Air Canada
24 Jun - 01 Jul	Air Canada
17 Jun - 12 Jul	Lufthansa
16 Jun - 12 Jul	Lufthansa
17 Jun - 12 Jul	British Airways	direct
21 Jun - 12 Jul	British Airways	direct

Also check the deals for one-way flights from St. Louis to London in June.

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 St. Louis to London in June from 896€

Return flights