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

Return flights

01 Jul - 25 Jul	Alaska Airlines
03 Jul - 10 Jul	WestJet
14 Jul - 30 Jul	Turkish Airlines
15 Jul - 31 Jul	Turkish Airlines

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

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 July from $1590

Return flights