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

Return flights

16 Jun - 19 Jun	Air Canada
20 Jun - 09 Jul	Scandinavian Airlines
09 Jun - 19 Jun	United
02 Jun - 13 Jun	Air Canada
27 Jun - 04 Jul	Scandinavian Airlines
26 Jun - 28 Jun	Scandinavian Airlines
16 Jun - 19 Jun	American Airlines	direct
07 Jun - 30 Jun	Aer Lingus
09 Jun - 19 Jun	British Airways	direct
10 Jun - 21 Jun	Lufthansa
28 Jun - 05 Jul	WestJet
19 Jun - 03 Jul	Frontier Airlines
24 Jun - 30 Jun	Aer Lingus
18 Jun - 02 Jul	WestJet
25 Jun - 30 Jun	WestJet
26 Jun - 05 Jul	Aer Lingus
19 Jun - 03 Jul	British Airways	direct
26 Jun - 05 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 $974

Return flights