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

Return flights

21 Apr - 28 Apr	Air Canada
21 Apr - 28 Apr	British Airways	direct
16 Apr - 30 Apr	Virgin Atlantic
06 Apr - 02 May	Air Canada

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

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 April from 557€

Return flights