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

Return flights

31 Jul - 11 Aug	Iberia
31 Jul - 10 Aug	Lufthansa
08 Jul - 14 Jul	Air Canada
08 Jul - 14 Jul	British Airways	direct
31 Jul - 11 Aug	Aer Lingus	direct

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from St. Louis to London in July from $827

Return flights