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

Return flights

24 Sep - 18 Oct	China Southern
23 Sep - 29 Oct	Ryanair
16 Sep - 14 Oct	China Southern
09 Sep - 21 Oct	China Southern
09 Sep - 14 Oct	China Southern
09 Sep - 17 Oct	China Southern
16 Sep - 29 Oct	Ryanair
10 Sep - 29 Oct	easyJet
16 Sep - 02 Oct	Air France
14 Sep - 01 Oct	Air France
17 Sep - 25 Sep	Air France
09 Sep - 23 Sep	Ryanair
12 Sep - 28 Sep	Ryanair
17 Sep - 24 Sep	Air France
12 Sep - 19 Sep	Ryanair
10 Sep - 17 Sep	KLM
10 Sep - 14 Sep	China Southern
11 Sep - 26 Sep	easyJet
12 Sep - 27 Sep	Ryanair
10 Sep - 28 Sep	China Southern

Also check the deals for one-way flights from Newcastle to Bangkok 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.

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Cheapest return flights from Newcastle to Bangkok in September from 546€

Return flights