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

Return flights

25 Sep - 23 Oct	Ryanair
17 Sep - 31 Oct	Corendon Airlines
25 Sep - 21 Oct	Ryanair
25 Sep - 20 Oct	Ryanair
19 Sep - 05 Oct	Ryanair
19 Sep - 22 Sep	Ryanair
30 Sep - 28 Oct	Ryanair
23 Sep - 15 Oct	Air France
21 Sep - 02 Oct	Air France
17 Sep - 22 Sep	Air France
21 Sep - 05 Oct	Air France
18 Sep - 25 Sep	KLM
22 Sep - 06 Oct	KLM
21 Sep - 28 Sep	Air France
27 Sep - 30 Sep	easyJet
19 Sep - 26 Sep	Ryanair
15 Sep - 29 Sep	easyJet
23 Sep - 26 Sep	easyJet
15 Sep - 30 Sep	KLM
26 Sep - 30 Sep	Ryanair

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 544€

Return flights