Flights from Seattle to Porto from US$ 1,029.99

For flights from Seattle (SEA) to Porto (OPO), January and October show the lowest average ticket prices among the months examined. Outside these months, prices are higher, especially during peak summer travel periods. Within those months, departures on Thursday are cheaper than departures on Sunday on this route. Ticket prices still depend on the exact travel dates and demand, so comparing a few nearby dates before booking is recommended.

Flights from Seattle (SEA) to Porto (OPO) require a connection via Frankfurt (FRA). The flight takes about 10 hours from Seattle (SEA) to Frankfurt (FRA) and about 3 hours from Frankfurt (FRA) to Porto (OPO).

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, passengers in all travel classes receive complimentary hot meals. In Economy Class this is offered as a Taste the World Menu, in Premium Economy Class as the Classic Premium Menu, and in Business Class as the Taste the World Gourmet Menu with several courses. Non-alcoholic drinks are included with these meals, while additional snacks and alcoholic beverages are available for purchase. On the connecting flight from Frankfurt (FRA) to Porto (OPO), onboard catering follows the short- and medium-haul concept and differs from the long-haul service.

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, Business Class provides a fully flat seat with 180° recline and a bed length of about 6 ft 6 in for comfortable rest. Each seat has direct aisle access, a large 17.3-inch 4K screen, power and USB connections, and Bluetooth for headphones, along with a mattress topper and a high-quality travel kit. Business Class guests are served two Taste the World Gourmet Menu meals with snacks, an exclusive selection of drinks including a welcome drink, and premium entertainment with noise-cancelling headphones. Before departure, Business Class on long-haul routes includes lounge access where offered, priority handling at the airport, an increased cabin baggage allowance of 16 kg, an increased free checked baggage allowance of 30 kg, and on routes between the United States or Canada and Europe two checked bags of 32 kg each plus one piece of sports equipment up to 30 kg when registered in advance.

Flights from Seattle (SEA) to Porto (OPO) with Condor are offered as one-stop connections via Frankfurt (FRA). In the summer season, Condor-marketed connections from Seattle (SEA) to Porto (OPO) via Frankfurt (FRA) operate on Monday, Tuesday, Thursday, Friday, Saturday and Sunday, while in the winter season they operate on Monday, Thursday and Saturday.

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, Wi‑Fi and additional entertainment are offered via the FlyConnect system. Passengers can connect their phones, tablets or laptops to the onboard network and choose between different paid internet packages, such as options focused on messaging or broader web use. On these aircraft, passengers also have access to a seatback screen with a wide selection of movies, TV shows, music and children’s content, and can use Bluetooth headphones with the personal monitor. On the connecting flight from Frankfurt (FRA) to Porto (OPO), onboard Wi‑Fi and entertainment options may differ depending on the airline running that part of the journey.

Information for the Seattle (SEA) to Porto (OPO) route does not point to a single cheapest calendar month to make the booking. Instead, lower average fares appear when the trip is booked about 40 days before departure. Bookings made much closer to departure or very far in advance are associated with higher prices on this route.

On Condor’s long-haul flight from Seattle (SEA) to Frankfurt (FRA), operated with an Airbus A330-900neo, three travel classes are offered: Economy Class, Premium Economy Class and Business Class. Economy Class provides standard seating and service, Premium Economy Class adds more legroom, enhanced seating comfort, upgraded meals and an increased Baggage allowance, and Business Class offers a fully flat bed, the Taste the World Gourmet Menu and priority services on the ground. On the connecting flight from Frankfurt (FRA) to Porto (OPO), travel classes and service concepts are based on the short- or medium-haul operation of the airline running that part of the journey and differ from the long-haul flight.

Condor does not operate a nonstop flight from Seattle (SEA) to Porto (OPO). Flights on this route are offered as one-stop connections via Frankfurt (FRA), with a long-haul flight from Seattle (SEA) to Frankfurt (FRA) followed by a separate flight from Frankfurt (FRA) to Porto (OPO).

On long-haul flights from Seattle (SEA) to Frankfurt (FRA), checked and cabin baggage allowances depend on the travel class and booked fare. In Premium Economy Class on these long-haul routes, the free baggage allowance is increased to 25 kg, with routes between the United States or Canada and Europe including one checked bag of 32 kg and an increased cabin baggage allowance of 10 kg. In Business Class, the free baggage allowance is increased to 30 kg, and on routes between the United States or Canada and Europe this rises to two checked bags of 32 kg each plus one piece of Sports equipment up to 30 kg when registered in advance no later than eight hours before departure, along with an increased cabin baggage allowance of 16 kg. Economy Class includes a lower free baggage allowance than Premium Economy and Business, and travellers who need more checked baggage in any class can add extra pieces for a fee; baggage rules on the shorter connecting flight from Frankfurt (FRA) to Porto (OPO) may differ when another airline operates that part of the journey.