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

Return flights

07 Sep - 19 Sep	KLM
16 Sep - 07 Oct	Air France
16 Sep - 08 Oct	Air France
12 Sep - 30 Sep	Air France
12 Sep - 26 Sep	Air France
17 Sep - 01 Oct	Ryanair
01 Sep - 17 Sep	KLM
21 Sep - 05 Oct	KLM
04 Sep - 14 Sep	KLM
09 Sep - 27 Sep	Lufthansa
13 Sep - 08 Oct	Air France
28 Sep - 12 Oct	KLM
29 Sep - 14 Oct	China Eastern

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 645€

Return flights