Cheap flights from Porto to Seattle from $478
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Porto to Seattle departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Porto to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Porto is on a Monday. momondo users have found tickets for Monday departures for as low as $792. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Porto because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,114.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Porto in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $792 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $934. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
When to book flights from Porto to Seattle
Cheap Porto to Seattle (OPO to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Porto to Seattle
How far is Porto to Seattle/Tacoma Intl by plane?
Seattle/Tacoma Intl is 5083.1 mi away from Porto. 16h 53m is a normal flight duration for this route.
When did momondo last update prices for flights from Porto Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Porto Airport to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Porto Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Porto Airport to Seattle/Tacoma Intl Airport is 1 as of June 2025.
How old do you have to be to fly from Porto Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Porto Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Porto to Seattle?
Based on momondo bookings for flights between Porto and Seattle, the leading airline is KLM, making up 100% of the total bookings.
Best airlines flying from Porto to Seattle
Compare and see reviews for airlines that fly from Porto to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $756 | Free Cancellation | Rating 7.8 1,360 reviews |
Traveling to a place near Seattle?
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Why should I use momondo to find a flight deal from Porto to Seattle?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Porto to Seattle for you.
Can I find flights from Porto to Seattle with flexible booking policies on momondo?
Yes. All flights to Seattle from Porto on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Porto to Seattle?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Porto.
I’m not ready to book a flight from Porto to Seattle right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Seattle from Porto. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.