AirHint found the following cheapest return flights from Seattle (SEA) to Rome (FCO) in August 2025 (see full year).

Return flights

04 Aug - 27 Aug	Icelandair
10 Aug - 26 Aug	Icelandair
11 Aug - 26 Aug	Air Canada
11 Aug - 20 Aug	Finnair
30 Aug - 06 Sep	Icelandair
20 Aug - 01 Sep	SWISS
19 Aug - 26 Aug	United
11 Aug - 19 Aug	Iberia
13 Aug - 20 Aug	United
28 Aug - 04 Sep	Icelandair
27 Aug - 03 Sep	United
25 Aug - 08 Sep	Icelandair
28 Aug - 18 Sep	Icelandair
17 Aug - 24 Aug	Icelandair
22 Aug - 05 Sep	Icelandair
22 Aug - 15 Sep	Icelandair
17 Aug - 27 Sep	Air Canada
25 Aug - 01 Sep	United
21 Aug - 28 Aug	United
03 Aug - 17 Aug	Condor

Also check the deals for one-way flights from Seattle to Rome in August.

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 Seattle to Rome in August from 415€

Return flights