Cheapest return flights from San Antonio to London in September from $743

AirHint found the following cheapest return flights from San Antonio (SAT) to London (LHR) in September 2025 (see full year).

Return flights

23 Sep - 30 Sep United
21 Sep - 29 Sep Scandinavian Airlines
19 Sep - 26 Sep United
21 Sep - 28 Sep United
24 Sep - 18 Oct Virgin Atlantic
25 Sep - 02 Oct British Airways
29 Sep - 06 Oct British Airways
19 Sep - 04 Oct Air Canada
12 Sep - 27 Sep Frontier Airlines
25 Sep - 18 Oct Frontier Airlines
27 Sep - 04 Oct United
26 Sep - 18 Oct Iberia
10 Sep - 24 Sep Scandinavian Airlines
10 Sep - 16 Sep Scandinavian Airlines
13 Sep - 28 Sep Frontier Airlines
14 Sep - 29 Sep Scandinavian Airlines

Also check the deals for one-way flights from San Antonio to London in September.

Skyscanner

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

Feel free to contact us with any feedback or request another flight research.