$255+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OPO
Sep 13 — Sep 201
Round-trip
1 adult, Economy
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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.Cheap flight deals from Seattle to Porto
Cheapest
Best
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One-way
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 August 14, 2026.
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 August 14, 2026.
This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:41 am -
2 stops21h 19m
Thu 11/268:20 am -
2 stops24h 21m
Deal found 8/11![Iberia logo]()
$741
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:40 pm -
2 stops18h 05m
Tue 10/135:45 pm -
2 stops29h 55m
Deal found 8/13![Multiple Airlines logo]()
$742
This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/175:10 am -
2 stops18h 30m
Wed 12/22:35 pm -
2 stops28h 50m
Deal found 8/11![Iberia logo]()
$752
This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:50 pm -
1 stop14h 00m
Thu 11/266:00 am -
2 stops16h 37m
Deal found 8/11![Multiple Airlines logo]()
$780
This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:50 pm -
1 stop14h 00m
Thu 11/261:45 pm -
1 stop31h 15m
Deal found 8/11![Lufthansa logo]()
$792
This Gotogate deal was found by Cheapflights users on 8/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:50 am -
2 stops17h 10m
Thu 4/16:20 am -
1 stop18h 39m
Deal found 8/11![Multiple Airlines logo]()
$794
This Mytrip deal was found by Cheapflights users on 8/9. 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.
Sat 11/142:35 pm -
3 stops33h 35m
Sat 11/214:00 pm -
3 stops33h 00m
Deal found 8/9![Multiple Airlines logo]()
$795
This Expedia deal was found by Cheapflights users on 8/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:31 am -
2 stops18h 14m
Tue 11/38:20 am -
2 stops24h 15m
Deal found 8/9![Iberia logo]()
$799
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/83:25 pm -
1 stop22h 35m
Thu 11/2611:15 am -
1 stop32h 32m
Deal found 8/13![Delta logo]()
$802
This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:50 pm -
1 stop14h 00m
Tue 11/246:00 am -
2 stops20h 22m
Deal found 8/13![Multiple Airlines logo]()
$804
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/711:50 pm -
2 stops25h 15m
Tue 11/2411:15 am -
1 stop32h 32m
Deal found 8/13![Delta logo]()
$807
Best flights from Seattle to PortoDiscover carefully curated flight deals from Seattle to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
Discover carefully curated flight deals from Seattle to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/23:25 pm -
1 stop22h 35m
Tue 11/105:55 am -
2 stops25h 05m
Deal found 8/13![Delta logo]()
$819
This United deal was found by Cheapflights users on 8/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:48 pm -
2 stops48h 12m
Sun 10/187:20 pm -
2 stops31h 12m
Deal found 8/9![Multiple Airlines logo]()
$901
This Turkish Airlines deal was found by Cheapflights users on 8/13. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/318:05 pm -
1 stop36h 20m
Wed 11/44:25 pm -
1 stop33h 45m
Deal found 8/13![Turkish Airlines logo]()
$913
This Lufthansa deal was found by Cheapflights users on 8/9. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:50 pm -
1 stop20h 35m
Mon 10/194:35 pm -
1 stop27h 45m
Deal found 8/9![Lufthansa logo]()
$954
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1210:59 pm -
1 stop27h 31m
Mon 10/2611:30 am -
1 stop34h 20m
Deal found 8/11![Delta logo]()
$853
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1111:45 am -
1 stop13h 20m
Fri 12/255:00 am -
1 stop14h 50m
Deal found 8/13![Delta logo]()
$853
This United deal was found by Cheapflights users on 8/11. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:30 am -
1 stop18h 15m
Sun 10/46:20 am -
1 stop18h 39m
Deal found 8/11![Multiple Airlines logo]()
$962
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/411:22 am -
2 stops20h 08m
Mon 10/195:00 am -
1 stop14h 52m
Deal found 8/9![Delta logo]()
$901
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:45 pm -
1 stop19h 15m
Tue 9/225:00 am -
1 stop14h 47m
Deal found 8/10![Delta logo]()
$901
Last-minute flights from Seattle to PortoDiscover last-minute flight deals from Seattle to Porto. Data last updated August 14, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Porto. Data last updated August 14, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Tue 8/253:40 pm -
3 stops33h 50m
Mon 8/317:10 pm -
3 stops33h 30m
Deal found 8/10![Multiple Airlines logo]()
$847
This Mytrip deal was found by Cheapflights users on 8/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:00 pm -
3 stops31h 10m
Wed 9/236:00 pm -
3 stops34h 40m
Deal found 8/11![Multiple Airlines logo]()
$861
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:55 pm -
1 stop20h 35m
Mon 10/58:55 pm -
1 stop24h 50m
Deal found 8/13![Multiple Airlines logo]()
$821
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/201:30 pm -
1 stop18h 00m
Mon 10/511:25 am -
1 stop32h 27m
Deal found 8/9![Delta logo]()
$839
This Gotogate deal was found by Cheapflights users on 8/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:50 am -
2 stops17h 10m
Thu 4/16:20 am -
1 stop18h 39m
Deal found 8/11![Multiple Airlines logo]()
$794
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:45 pm -
1 stop19h 15m
Thu 4/15:00 am -
1 stop14h 33m
Deal found 8/11![Delta logo]()
$819
This Bravofly deal was found by Cheapflights users on 8/13. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:10 pm -
1 stop17h 30m
Mon 10/57:20 pm -
2 stops31h 32m
Deal found 8/13![Multiple Airlines logo]()
$822
This Bravofly deal was found by Cheapflights users on 8/13. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:10 pm -
1 stop17h 30m
Mon 10/54:35 pm -
1 stop27h 45m
Deal found 8/13![Lufthansa logo]()
$840
One-way flights from Seattle to PortoSearch for one-way flight options from Seattle to Porto. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
Search for one-way flight options from Seattle to Porto. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:40 pm -
2 stops20h 50m
Deal found 8/13![Multiple Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:52 am -
3 stops25h 53m
Deal found 8/13![Multiple Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:35 pm -
3 stops51h 20m
Deal found 8/13![Multiple Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:00 pm -
3 stops27h 50m
Deal found 8/9![Multiple Airlines logo]()
$384
This oojo deal was found by Cheapflights users on 8/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:10 pm -
1 stop17h 35m
Deal found 8/10![Lufthansa logo]()
$405
This oojo deal was found by Cheapflights users on 8/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:10 pm -
1 stop17h 30m
Deal found 8/9![Lufthansa logo]()
$408
Find 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 August 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $741 (Expedia) |
One-way from | $255 (Mytrip) |
Popular in | December |
Cheapest in | January |
Average price | $1,007 |
Cheapflights Fare Finder
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 August 14, 2026.
Use the filters below to find and compare flights from Seattle to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Mon 11/2
3:25 pm-10:00 pm
1 stop22h 35m
Porto
Tue 11/10
5:55 am-11:00 pm
2 stops25h 05m
$819
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Mon 10/12
10:59 pm-10:30 am
1 stop27h 31m
Porto
Mon 10/26
11:30 am-2:50 pm
1 stop34h 20m
$853
Quickest round-trip
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Fri 12/11
11:45 am-9:05 am
1 stop13h 20m
Porto
Fri 12/25
5:00 am-11:50 am
1 stop14h 50m
$853
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Sat 10/3
10:48 pm-7:00 am
2 stops48h 12m
Porto
Sun 10/18
7:20 pm-6:32 pm
2 stops31h 12m
$901
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Sun 10/4
11:22 am-3:30 pm
2 stops20h 08m
Porto
Mon 10/19
5:00 am-11:52 am
1 stop14h 52m
$901
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Wed 9/16
6:45 pm-10:00 pm
1 stop19h 15m
Porto
Tue 9/22
5:00 am-11:47 am
1 stop14h 47m
$901
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Sat 10/31
8:05 pm-3:25 pm
1 stop36h 20m
Porto
Wed 11/4
4:25 pm-6:10 pm
1 stop33h 45m
$913
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Fri 10/2
6:50 pm-11:25 pm
1 stop20h 35m
Porto
Mon 10/19
4:35 pm-12:20 pm
1 stop27h 45m
$954
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Mon 9/14
7:30 am-9:45 am
1 stop18h 15m
Porto
Sun 10/4
6:20 am-4:59 pm
1 stop18h 39m
$962
Cheapest one-way
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Tue 10/13
2:10 pm-3:45 pm
1 stop17h 35m
$406
Showing 1-10 of 17 resultsSorted by cheapest first
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 August.
| 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 Accuracy- | 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.
SEA-OPO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Porto
How far ahead should I book a flight from Seattle to Porto?
Booking 44 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 $498). Flying from Seattle to Porto in December is currently the most expensive (average of $1,471). 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.
How much does it cost to fly round-trip from Seattle to Porto?
Airfare is below average for this route at the moment.
Seattle to Porto flights typically cost between $923 and $1,269 in November.The cheapest round-trip price found within the last 5 days was $741 on Iberia (Nov 11-Nov 26).
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 August 14, 2026.
Peruse reviews from past customers who have flown with KLM,Delta, andAir France from Seattle to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.4
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Food
7.3
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Related info for your journey
Find useful and relevant information for your journey from Seattle to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
Browse thousands of different options on Cheapflights for your next trip
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Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.
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Seattle and Porto flights
Browse other Seattle and Porto flight options. Last updated on August 14, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on August 14, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 14, 2026.
Top 7 airlines flying from Seattle to Porto
Discover the top 7 airlines that operate flights from Seattle to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$490 | Average$950 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$503 | Average$923 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$588 | Average$1,011 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$654 | Average$856 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$660 | Average$823 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$692 | Average$886 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$905 | Average$1,029 | FlexibilityNo cancel fee | On-time77% |