Cheap flights from Portugal to Seattle from $313
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Seattle departing on 9/30. 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 Portugal 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 month to fly to Seattle?
In general, December is the cheapest month to fly from Portugal to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $795. If you don’t want to visit Seattle in December, then you should wait until April to fly from Portugal, when ticket prices are also cheap, with an average price of $800.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Portugal is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $800. 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 Portugal because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,074.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Portugal in the evening is the least expensive time of day to depart. momondo users have found prices as low as $718 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $873. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Portugal when booking 26 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $935 when searching 26 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Portugal for as low as $781 on momondo.
What is the cheapest airline that flies from Portugal to Seattle/Tacoma Intl?
Icelandair, Aer Lingus, and Turkish Airlines are the most popular carriers operating from Portugal to Seattle/Tacoma Intl
What airlines fly to Seattle?
British Airways, KLM and United Airlines are the top three most popular airlines that fly to Seattle from Portugal according to our data. British Airways is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
Cheap Portugal to Seattle flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portugal to Seattle
When did momondo last update prices for flights from Portugal to Seattle/Tacoma Intl Airport?
Prices for flights from Portugal to Seattle/Tacoma Intl Airport are updated daily.
How many operators does momondo search for flights from Portugal to Seattle/Tacoma Intl Airport?
As of June 2025, there are 6 operators available to choose from for flights from Portugal to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Portugal to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portugal 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.
Best airlines flying from Portugal to Seattle
Compare and see reviews for airlines that fly from Portugal to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $717 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $720 | Free Cancellation | Rating 6.6 7,008 reviews | |||
| PriceFrom $738 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $756 | Free Cancellation | Rating 7.8 1,358 reviews | |||
| PriceFrom $762 | Free Cancellation | Rating 7.5 1,463 reviews | |||
| PriceFrom $775 | Free Cancellation | Rating 8.0 7,950 reviews |
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Why should I use momondo to find a flight deal from Portugal 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 Portugal to Seattle for you.
Can I find flights from Portugal to Seattle with flexible booking policies on momondo?
Yes. All flights to Seattle from Portugal on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Portugal to Seattle?
Once all potential Portugal to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Portugal to Seattle right now. Can momondo alert me if prices change?
Price alerts on flights to Seattle from Portugal are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.