Porto (OPO) → Seattle (SEA)
About Porto to Seattle Flights
Discover the best flights from Porto to Seattle, covering 8,187 km in approximately 10h 44m. Porto (OPO) to Seattle (SEA) is one of the major long-haul routes connecting Portugal and United States. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Porto to Seattle.
12-Month Price History
Flight prices from Porto to Seattle vary significantly throughout the year. February typically offers the best deals with average prices around $1474, while July sees the highest prices, averaging $2472. Savvy travelers can save up to 40% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
112 days
For best prices
Booking Tips
For the best prices on Porto to Seattle flights, we recommend booking 158 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
TAP Air Portugal TP | $2270 | $7890 | $13400 |
United Airlines UA | $2400 | $8000 | $14330 |
Delta Air Lines DL | $2600 | $10140 | $15210 |
British Airways BA | $2620 | $8360 | $14780 |
American Airlines AA | $2670 | $9610 | $14530 |
Portugália Airlines NI | $2770 | $10040 | $12790 |
Alaska Airlines AS | $2860 | $9230 | $14520 |
TAP Air Portugal
TP
Economy
$2270
Business
$7890
First
$13400
United Airlines
UA
Economy
$2400
Business
$8000
First
$14330
Delta Air Lines
DL
Economy
$2600
Business
$10140
First
$15210
British Airways
BA
Economy
$2620
Business
$8360
First
$14780
American Airlines
AA
Economy
$2670
Business
$9610
First
$14530
Portugália Airlines
NI
Economy
$2770
Business
$10040
First
$12790
Alaska Airlines
AS
Economy
$2860
Business
$9230
First
$14520
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
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Frequently Asked Questions
How long is the flight from Porto to Seattle?
The flight time from Porto (OPO) to Seattle (SEA) is approximately 10 hours and 44 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Porto and Seattle?
The aerial distance between Porto and Seattle is 8,187 kilometers (5,087 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Porto to Seattle?
Several airlines operate flights between Porto and Seattle, including Delta Air Lines, Alaska Airlines, TAP Air Portugal and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from Porto to Seattle?
Based on historical data, February typically offers the lowest airfares for flights from Porto to Seattle. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Seattle?
For the best prices on Porto to Seattle flights, we recommend booking 87 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Porto to Seattle?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of Portugal traveling to United States should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Porto and Seattle?
Porto operates on Europe/Lisbon time zone, while Seattle is in the America/Los_Angeles time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.