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

Return flights

06 Sep - 13 Sep	Air China
08 Sep - 23 Sep	Air China
11 Sep - 18 Sep	Air China
05 Sep - 12 Sep	Air China
06 Sep - 12 Sep	Air China
18 Sep - 29 Sep	China Airlines
12 Sep - 19 Sep	China Airlines
07 Sep - 13 Oct	China Airlines
09 Sep - 13 Oct	Air China
09 Sep - 30 Sep	China Airlines
19 Sep - 27 Sep	China Airlines
15 Sep - 23 Sep	China Airlines
28 Sep - 11 Oct	China Airlines
27 Sep - 18 Oct	Asiana Airlines
30 Sep - 11 Oct	Singapore Airlines
27 Sep - 11 Oct	Singapore Airlines
30 Sep - 10 Oct	Singapore Airlines
29 Sep - 10 Oct	China Airlines
29 Sep - 11 Oct	China Airlines
27 Sep - 13 Oct	Air China

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

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 Busan to London in September from 719€

Return flights