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

Return flights

16 Sep - 29 Oct	Ryanair
23 Sep - 21 Oct	British Airways
15 Sep - 06 Oct	British Airways
10 Sep - 25 Sep	Air France
15 Sep - 05 Oct	British Airways
24 Sep - 08 Oct	British Airways
15 Sep - 04 Oct	KLM
24 Sep - 04 Oct	KLM
24 Sep - 15 Oct	KLM
09 Sep - 16 Sep	easyJet
10 Sep - 24 Sep	Ryanair
24 Sep - 12 Oct	KLM
24 Sep - 18 Oct	KLM
24 Sep - 30 Sep	easyJet
02 Sep - 23 Sep	easyJet
02 Sep - 18 Sep	Ryanair
08 Sep - 15 Sep	easyJet
09 Sep - 19 Sep	Air France
12 Sep - 22 Sep	easyJet
12 Sep - 19 Sep	KLM

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 559€

Return flights