Cheap flights from Seattle to Portugal from $275
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Portugal departing on 10/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Portugal
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Icelandair flights from Seattle to Portugal
Our best Icelandair deals on Seattle to Portugal flight tickets
United Airlines flights from Seattle to Portugal
Our best United Airlines deals on Seattle to Portugal flight tickets
See travel insights to Portugal from
How to get the cheapest flight ticket from Seattle to Portugal
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 Portugal?
The cheapest month to fly to Portugal from Seattle is in January. Flight prices, which tend to average around $734, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Seattle during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $759.
What is the cheapest day to depart on your flight to Portugal?
According to our data, Monday is the cheapest day to fly to Portugal from Seattle. The lowest ticket price found for a Monday departure recently was $908. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Friday, with ticket prices averaging around $1,111.
What is the cheapest time of day to depart on your flight to Portugal?
Our most recent data shows that the best time of day to fly to Portugal is in the afternoon. Flights from Seattle to Portugal during this time can be as low as $959. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,074 per ticket.
How far in advance should I book a flight to Portugal?
You are more likely to see cheaper flights to Portugal from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $962 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Seattle for as low as $882 on momondo.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Portugal?
Air Canada, TAP AIR PORTUGAL, and Icelandair are the most popular carriers operating from Seattle/Tacoma Intl to Portugal
What airlines fly to Portugal?
British Airways, Delta and United Airlines are the top three most popular airlines that fly to Portugal from Seattle according to our data. British Airways is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 13 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.
Cheap Seattle to Portugal flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Portugal
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Portugal?
Prices for flights from Seattle/Tacoma Intl Airport to Portugal were last updated today.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Portugal?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Portugal is 13 as of June 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Portugal?
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 Seattle/Tacoma Intl Airport to Portugal.
What documentation or ID do you need to fly to Portugal?
The necessary travel and health documents for your Portugal 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 Seattle to Portugal
Compare and see reviews for airlines that fly from Seattle to Portugal with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $477 | Free Cancellation | Rating 7.0 513 reviews | |||
| PriceFrom $581 | Free Cancellation | Rating 6.8 7,200 reviews | |||
| PriceFrom $581 | Free Cancellation | Rating 6.6 7,081 reviews | |||
| PriceFrom $619 | Free Cancellation | Rating 7.4 8,852 reviews | |||
| PriceFrom $627 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $636 | Free Cancellation | Rating 8.0 7,973 reviews | |||
| PriceFrom $648 | Free Cancellation | Rating 7.8 1,365 reviews | |||
| PriceFrom $652 | Free Cancellation | Rating 7.3 1,413 reviews | |||
| PriceFrom $667 | Free Cancellation | Rating 7.1 1,140 reviews | |||
| PriceFrom $685 | Free Cancellation | Rating 7.5 1,471 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seattle to Portugal?
It is quick and easy to find Seattle to Portugal flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Portugal that suits you.
Can I find flights from Seattle to Portugal with flexible booking policies on momondo?
All flight searches from Seattle to Portugal on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Seattle to Portugal?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Portugal.
I’m not ready to book a flight from Seattle to Portugal right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Seattle and alert you when they change.