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

Return flights

01 Sep - 11 Sep	Fly Play
06 Sep - 11 Sep	Fly Play
06 Sep - 13 Sep	Fly Play
05 Sep - 13 Sep	Fly Play
08 Sep - 15 Sep	Fly Play
23 Sep - 07 Oct	Iberia
09 Sep - 16 Sep	Iberia
07 Sep - 13 Sep	Iberia For Level
07 Sep - 11 Sep	Iberia For Level
16 Sep - 21 Oct	Aer Lingus
02 Sep - 30 Sep	Iberia
25 Sep - 30 Sep	Iberia For Level
16 Sep - 01 Oct	Iberia
25 Sep - 04 Oct	Icelandair
28 Sep - 05 Oct	Icelandair
25 Sep - 02 Oct	Icelandair
17 Sep - 05 Oct	Air Canada
16 Sep - 21 Oct	Air France	direct
16 Sep - 01 Oct	Air France	direct
24 Sep - 03 Oct	Air France	direct

Also check the deals for one-way flights from Boston to Paris 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 Boston to Paris in September from 369€

Return flights