$403+ Cheap flights from Seattle (SEA) to Porto (OPO)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Seattle to Porto with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.The best prices from Seattle/Tacoma Intl to Porto are usually found in November or February, booked 89 days in advance, depart on a Tuesday or Monday and return on a Monday
Cheap flight deals from Seattle to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 13, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $599 (Mytrip) |
One-way from | $403 (Ovago) |
Popular in | June |
Cheapest in | November |
Average price | $859 |
Find flight deals from Seattle to Porto
Cheapest flights from Seattle to PortoExplore the most affordable flight options available from Seattle to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 13, 2025.
Explore the most affordable flight options available from Seattle to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 13, 2025.
This Mytrip deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Ticket deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Ticket deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Air Canada deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This KLM deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 1/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flights from Seattle to Porto within your budget
Customize your flight search to find flights from Seattle to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 13, 2025.
Fly from
Fly to
Route
Depart
Return
Price
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
vie. 2/21
2:35 pm-11:10 pm
2 stops24h 35m
Porto
vie. 2/28
7:00 am-5:00 pm
2 stops18h 00m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
mié. 2/26
3:24 pm-6:40 pm
2 stops19h 16m
Porto
mié. 3/5
7:20 pm-10:53 pm
2 stops35h 33m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
mié. 2/26
2:00 pm-3:15 pm
1 stop17h 15m
Porto
mié. 3/5
4:30 pm-12:10 pm
1 stop27h 40m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
mié. 2/26
5:45 am-3:15 pm
2 stops25h 30m
Porto
mié. 3/5
6:00 am-9:30 pm
2 stops23h 30m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
mié. 2/26
2:00 pm-3:15 pm
1 stop17h 15m
Porto
mié. 3/5
6:00 am-9:30 pm
2 stops47h 30m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
lun. 2/3
6:15 am-9:05 am
2 stops18h 50m
Porto
lun. 2/10
11:15 am-11:46 am
1 stop32h 31m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
vie. 2/21
2:07 pm-4:00 pm
2 stops17h 53m
Porto
vie. 2/28
8:20 am-11:06 pm
2 stops22h 46m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
mié. 4/23
7:05 pm-9:45 am
1 stop30h 40m
Porto
vie. 5/2
4:50 pm-5:10 pm
1 stop32h 20m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
mar. 5/27
11:19 pm-10:35 am
1 stop27h 16m
Porto
mar. 6/10
6:05 pm-10:09 pm
2 stops36h 04m
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
mar. 4/15
7:20 am-11:15 am
2 stops19h 55m
Compare providers for flights from Seattle to Porto
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Porto in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Porto flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Seattle to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Seattle with our price prediction graph.
Travel insights for flights from Seattle to Porto
Get recent, data-driven insights about flights from Seattle to Porto including ideal travel times, pricing trends, and more.
How far ahead should I book a flight from Seattle to Porto?
Use this chart to determine the optimal time to book a round-trip flight from Seattle to Porto. Price data was last updated on January 10, 2025.
Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Porto. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Seattle to Porto?
Currently, January is the cheapest month in which you can book a flight from Seattle to Porto (average of $523). Flying from Seattle to Porto in June is currently the most expensive (average of $1,083). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SEA to OPO?
Find hourly flight availability from Seattle to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 13, 2025.
It’s optimal to fly from Seattle to Porto in the evening. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the morning.
What is the cheapest day to fly from Seattle to Porto?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Porto. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their Seattle to Porto flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Rainfall in Porto by month
Plan your trip to Porto by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.
Temperature in Porto by month
Plan your trip to Porto by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).
Reviews of airlines servicing Porto
Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated enero 13, 2025.
Overall
Entertainment
Boarding
Comfort
Food
Crew
Reviews
I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.
Overall
Entertainment
Boarding
Comfort
Food
Crew
Reviews
I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.
Overall
Entertainment
Boarding
Comfort
Food
Crew
Reviews
I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.
Overall
Entertainment
Boarding
Comfort
Food
Crew
Reviews
I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.
Overall
Entertainment
Boarding
Comfort
Food
Crew
Reviews
I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.