AirHint found the following cheapest return flights from Newcastle (NCL) to Bangkok (BKK) in September 2026 (see full year).

Return flights

29 Sep - 27 Oct	Ryanair
01 Sep - 22 Sep	KLM
06 Sep - 24 Sep	Air France
27 Sep - 23 Oct	Ryanair
09 Sep - 07 Oct	Air France
05 Sep - 19 Sep	Air France
01 Sep - 29 Sep	KLM
12 Sep - 10 Oct	Air France
26 Sep - 10 Oct	Aer Lingus
01 Sep - 17 Sep	KLM
01 Sep - 23 Sep	KLM
30 Sep - 12 Oct	Ryanair
27 Sep - 03 Oct	Air France
07 Sep - 13 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 $686

Return flights