Cheapest return flights from Bangkok to London in September from 699€

Best time to book flights for Bangkok (BKK) to London (LHR) flights at AirHint

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

Return flights

10 Sep - 24 Sep SWISS
21 Sep - 05 Oct SWISS
10 Sep - 11 Sep Vietnam Airlines
20 Sep - 30 Sep Finnair
22 Sep - 22 Oct Finnair
09 Sep - 18 Sep Vietnam Airlines
24 Sep - 05 Oct Royal Brunei
12 Sep - 21 Sep SWISS
03 Sep - 10 Sep Finnair
09 Sep - 30 Sep Finnair
18 Sep - 16 Oct SWISS
11 Sep - 09 Oct Finnair
23 Sep - 21 Oct Jetstar
29 Sep - 13 Oct Finnair
06 Sep - 20 Sep SWISS
11 Sep - 16 Oct Finnair
01 Sep - 10 Oct Finnair
02 Sep - 10 Oct Finnair
12 Sep - 21 Sep EVA Air direct
10 Sep - 11 Sep EVA Air direct

Also check the deals for one-way flights from Bangkok 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