Flights from Seattle to Porto from $ 902*
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1 Passenger, Economy
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today
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Featured daily fares for flights from Seattle (SEA) to Porto (OPO)
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More United deals on Seattle (SEA) to Porto (OPO) flights
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From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| Seattle (SEA) | Porto (OPO) | Roundtrip | Economy | 04/28/26 - 05/05/26 | from $ 902 Viewed: 15 minutes ago |
| Seattle (SEA) | Porto (OPO) | Roundtrip | Economy | 04/22/26 - 04/29/26 | from $ 918 Viewed: 1 day ago |
| Seattle (SEA) | Porto (OPO) | Roundtrip | Economy | 07/15/26 - 08/25/26 | from $ 918 Viewed: 23 hours ago |
| Seattle (SEA) | Porto (OPO) | Roundtrip | Economy | 04/22/26 - 05/06/26 | from $ 920 Viewed: 1 day ago |
| Seattle (SEA) | Porto (OPO) | Roundtrip | Economy | 04/28/26 - 05/12/26 | from $ 923 Viewed: 15 minutes ago |
| Seattle (SEA) | Porto (OPO) | Roundtrip | Economy | 04/27/26 - 05/11/26 | from $ 934 Viewed: 15 minutes ago |
| Seattle (SEA) | Porto (OPO) | Roundtrip | Economy | 05/05/26 - 05/19/26 | from $ 939 Viewed: 15 minutes ago |
| Seattle (SEA) | Porto (OPO) | Roundtrip | Economy | 05/05/26 - 05/12/26 | from $ 939 Viewed: 15 minutes ago |
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
