AirHint found the following cheapest return flights from Seattle (SEA) to Amsterdam (AMS) in July 2025 (see full year).

Return flights

29 Jul - 05 Aug	Aer Lingus
28 Jul - 04 Aug	Aer Lingus
04 Jul - 14 Aug	Aer Lingus
20 Jul - 10 Aug	Aer Lingus
30 Jul - 10 Aug	Scandinavian Airlines
04 Jul - 14 Aug	Delta	direct
07 Jul - 15 Jul	Icelandair
04 Jul - 11 Jul	Icelandair
03 Jul - 16 Jul	Icelandair
07 Jul - 28 Jul	Scandinavian Airlines
29 Jul - 05 Aug	Air France	direct
07 Jul - 31 Jul	Icelandair
07 Jul - 15 Jul	Air France	direct
03 Jul - 17 Jul	Frontier Airlines
20 Jul - 10 Aug	Delta	direct
30 Jul - 10 Aug	Air France	direct
28 Jul - 04 Aug	Delta	direct
04 Jul - 11 Jul	Air France	direct
07 Jul - 14 Jul	Delta	direct
10 Jul - 14 Jul	Delta	direct

Also check the deals for one-way flights from Seattle to Amsterdam in July.

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 Amsterdam in July from $606

Return flights