Cheapest return STL–LGW flights, June

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

Return flights

14 Jun - 23 Jun Frontier Airlines
10 Jun - 17 Jun Air Canada
12 Jun - 19 Jun Southern Airways Express
12 Jun - 27 Jun Southern Airways Express
23 Jun - 03 Jul Frontier Airlines
23 Jun - 01 Jul Frontier Airlines
19 Jun - 05 Jul WestJet

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

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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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