AirHint found the following cheapest return flights from Paris (CDG) to Boston (BOS) in September 2025 (see full year).

Return flights

23 Sep - 30 Sep	Condor
18 Sep - 21 Sep	Condor
25 Sep - 29 Sep	Condor
21 Sep - 02 Oct	Condor
25 Sep - 06 Oct	Condor
21 Sep - 29 Sep	Condor
23 Sep - 29 Sep	Condor
29 Sep - 05 Oct	Condor
29 Sep - 06 Oct	Condor
28 Sep - 05 Oct	Condor
23 Sep - 25 Sep	Condor
30 Sep - 30 Sep	Condor
18 Sep - 28 Sep	Condor
18 Sep - 23 Sep	Condor
25 Sep - 28 Sep	Condor
29 Sep - 23 Oct	Condor
27 Sep - 05 Oct	easyJet
30 Sep - 11 Oct	Aer Lingus
28 Sep - 04 Oct	Condor
27 Sep - 04 Oct	Icelandair

Also check the deals for one-way flights from Paris to Boston 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 Paris to Boston in September from 372€

Return flights