Cheap flight from Seattle to Porto from $500
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Flights from Seattle to Porto
Find cheap airlines flights from Seattle to Porto
Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.
Cheap flight deals from Seattle to Porto
We've found these cheap flights for you. You can book one-way or round-trip flight tickets.
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SEA 6:07 PM20h 8m1 stopsOPO 10:15 PMSeattle - Porto | Fri, May 16 | Virgin Atlantic
OPO 6:40 AM17h 17m1 stopsSEA 3:57 PMPorto - Seattle | Fri, May 23 | Delta Air Lines$803 $1,04123% OFF23% OFF$1,041 $803 -
SEA 6:50 PM20h 30m1 stopsOPO 11:20 PMSeattle - Porto | Fri, May 16 | Lufthansa
OPO 9:00 AM35h 11m1 stopsSEA 12:11 PMPorto - Seattle | Fri, May 23 | United Airlines$858 $1,04118% OFF18% OFF$1,041 $858 -
SEA 7:10 PM36h 40m1 stopsOPO 3:50 PMSeattle - Porto | Tue, May 20 | Turkish Airlines
OPO 4:50 PM32h 25m1 stopsSEA 5:15 PMPorto - Seattle | Wed, May 28 | Turkish Airlines$861 $1,04117% OFF17% OFF$1,041 $861 -
SEA 6:07 PM15h 48m1 stopsOPO 5:55 PMSeattle - Porto | Mon, May 19 | KLM Royal Dutch Airlines
OPO 5:30 PM30h 27m1 stopsSEA 3:57 PMPorto - Seattle | Mon, May 26 | KLM Royal Dutch Airlines$86517% OFF$1,041 $865 -
SEA 11:28 AM15h 27m1 stopsOPO 10:55 AMSeattle - Porto | Mon, Jun 2 | Jetblue Airways
OPO 6:05 PM24h 13m1 stopsSEA 10:18 AMPorto - Seattle | Mon, Jun 9 | TAP Air Portugal$87816% OFF$1,041 $878 -
SEA 6:07 PM15h 48m1 stopsOPO 5:55 PMSeattle - Porto | Mon, May 19 | Delta Air Lines
OPO 11:25 AM32h 15m1 stopsSEA 11:40 AMPorto - Seattle | Mon, May 26 | Delta Air Lines$88015% OFF$1,041 $880 -
SEA 11:30 AM16h 25m1 stopsOPO 11:55 AMSeattle - Porto | Wed, May 28 | United Airlines
OPO 1:30 PM29h 21m1 stopsSEA 10:51 AMPorto - Seattle | Thu, Jun 5 | Air Transat$88115% OFF$1,041 $881 -
SEA 11:30 AM16h 25m1 stopsOPO 11:55 AMSeattle - Porto | Wed, May 28 | Air Canada
OPO 1:30 PM29h 21m1 stopsSEA 10:51 AMPorto - Seattle | Thu, Jun 5 | Air Transat$88115% OFF$1,041 $881 -
SEA 2:15 PM17h 30m1 stopsOPO 3:45 PMSeattle - Porto | Mon, May 19 | United Airlines
OPO 12:35 PM31h1 stopsSEA 11:35 AMPorto - Seattle | Tue, May 27 | United Airlines$89214% OFF$1,041 $892
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SEA 2:15 PM24h 35m1 stopsOPO 10:50 PMSeattle - Porto | Mon, May 19 | Lufthansa
OPO 12:35 PM31h1 stopsSEA 11:35 AMPorto - Seattle | Tue, May 27 | United Airlines$89614% OFF$1,041 $896
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SEA 1:00 PM17h 25m1 stopsOPO Invalid DateSeattle - Porto | Sun, May 18 | Normal Airline
OPO 3:00 PM6hNonstopSEA 4:00 PMPorto - Seattle | Tue, May 20 | Normal AirlineFind More FlightsFind More Flights
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SEA 2:15 PM24h 30m1 stopsOPO 10:45 PMSeattle - Porto | Sat, May 17 | United Airlines$500 $66825% OFF25% OFF$668 $500
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SEA 2:15 PM24h 30m1 stopsOPO 10:45 PMSeattle - Porto | Sat, May 17 | Lufthansa$519 $66822% OFF22% OFF$668 $519
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SEA 7:23 AM20h 17m1 stopsOPO 11:40 AMSeattle - Porto | Mon, May 26 | Alaska Airlines$549 $66818% OFF18% OFF$668 $549 -
SEA 11:28 AM15h 27m1 stopsOPO 10:55 AMSeattle - Porto | Mon, Jun 2 | Jetblue Airways$55916% OFF$668 $559
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SEA 4:25 PM22h 40m1 stopsOPO 11:05 PMSeattle - Porto | Mon, Jun 2 | Swiss Airlines$56016% OFF$668 $560 -
SEA 7:23 AM20h 22m1 stopsOPO 11:45 AMSeattle - Porto | Wed, Jun 4 | Alaska Airlines$56915% OFF$668 $569
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SEA 11:28 AM15h 27m1 stopsOPO 10:55 AMSeattle - Porto | Sat, Jun 7 | Jetblue Airways$57015% OFF$668 $570
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SEA 11:35 AM15h 20m1 stopsOPO 10:55 AMSeattle - Porto | Sat, May 17 | Jetblue Airways$57314% OFF$668 $573
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SEA 6:10 PM20h 5m1 stopsOPO 10:15 PMSeattle - Porto | Tue, May 20 | Delta Air Lines$57314% OFF$668 $573
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SEA 3:40 PM36h1 stopsOPO 11:40 AMSeattle - Porto | Thu, Jun 5 | Alaska Airlines$57414% OFF$668 $574
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SEA 1:00 PM17h 25m1 stopsOPO Invalid DateSeattle - Porto | Sun, May 18 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
Flight Info | Seattle to Porto
| Cheapest one-way flight price | $499 |
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| Off-season for travel | April |
| Peak season for travel | February |
| Flight distance | 8,187.39 km |
| Popular airline | Lufthansa |
When is the cheapest time to fly from Seattle to Porto?
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Frequently Asked Questions
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When are flight tickets from Seattle (SEA) to Porto (OPO) the cheapest?
Airlines adjust prices for flights from Seattle to Porto based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much do flights from Seattle (SEA) to Porto (OPO) cost?
According to Trip.com's data, the lowest price is around $1,187.
How to find a cheap flight from Seattle to Porto
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