Cheap flights from Seattle (SEA) to Porto (OPO) from $489

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — OPO
abr. 23 — abr. 301

The best prices from Seattle/Tacoma Intl to Porto are usually found in November or February, booked 19 days in advance, depart on a Wednesday 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 abril 18, 2024.

Popular in

June

Cheapest in

November

Average price

$1,033

Round-trip from

$523
High demand for flights, 29% potential price rise
Best time to find cheap flights, 36% potential price drop
Average for round-trip flights in April 2024
From Seattle/Tacoma Intl to Porto

What is the cheapest day to fly round-trip from Seattle to Porto?

Flights from Seattle to Porto are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Porto.

How far in advance should I book a flight from Seattle to Porto?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 20 days in advance, which can save you up to 117% on flights from Seattle to Porto compared to booking the week you need them. Waiting 20 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $1,395. For sooner than that we have options available in the next 3 days from $2,391.

What is the cheapest month to fly from Seattle to Porto?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, November can be a great choice for travel to Porto. Flights to Porto from Seattle in November are about $1,163 on average during November, but can be found for as low as $640.

When is the cheapest time to fly from Seattle to Porto (SEA - OPO)?

It’s optimal to fly from Seattle to Porto in the morning. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight in the evening.

Cheap Air France flights from Seattle to Porto

Explore cheap flight options specifically provided by Air France for the route between Seattle and Porto. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,192,047 searches. Data last updated abril 18, 2024.
Consider these cheap Air France flights we've found departing from Seattle to Porto. Be sure to come back soon if the deals available don't appeal to you at this time.
lun. 7/291:35 pmSEA - OPO
1 stop17h 55mAir France
jue. 8/159:15 amOPO - SEA
2 stops20h 54mAir France
Deal found 4/16$993
lun. 7/291:35 pmSEA - OPO
1 stop17h 55mAir France
vie. 8/167:05 pmOPO - SEA
1 stop24h 15mAir France
Deal found 4/16$1,033
jue. 7/116:15 pmSEA - OPO
1 stop16h 00mAir France
mar. 7/239:15 amOPO - SEA
1 stop34h 05mAir France
Deal found 4/18$1,230

Cheap United Airlines flights from Seattle to Porto

Explore cheap flight options specifically provided by United Airlines for the route between Seattle and Porto. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,192,047 searches. Data last updated abril 18, 2024.
Some of the best deals we've found on United Airlines flights traveling from Seattle to Porto. Ensure the flight price, dates, time, and airline match your criteria before you book.
mar. 10/811:50 amSEA - OPO
1 stop13h 55mUnited Airlines
mar. 10/296:00 amOPO - SEA
2 stops34h 53mUnited Airlines
Deal found 4/17$1,037
dom. 6/26:51 amSEA - OPO
1 stop16h 04mUnited Airlines
mar. 7/212:35 pmOPO - SEA
1 stop16h 46mUnited Airlines
Deal found 4/17$1,109
dom. 6/26:51 amSEA - OPO
1 stop16h 04mUnited Airlines
mié. 7/39:00 amOPO - SEA
2 stops20h 13mUnited Airlines
Deal found 4/17$1,113
dom. 6/26:51 amSEA - OPO
1 stop16h 04mUnited Airlines
jue. 7/46:00 amOPO - SEA
1 stop14h 25mUnited Airlines
Deal found 4/17$1,118
vie. 5/316:51 amSEA - OPO
1 stop16h 04mUnited Airlines
mar. 7/212:35 pmOPO - SEA
1 stop16h 46mUnited Airlines
Deal found 4/17$1,159
jue. 6/66:51 amSEA - OPO
1 stop16h 04mUnited Airlines
dom. 6/169:00 amOPO - SEA
2 stops21h 15mUnited Airlines
Deal found 4/17$1,213
dom. 4/216:38 amSEA - OPO
2 stops19h 07mUnited Airlines
lun. 5/66:00 amOPO - SEA
2 stops24h 53mUnited Airlines
Deal found 4/18$1,469
dom. 4/2112:30 pmSEA - OPO
1 stop13h 15mUnited Airlines
lun. 5/612:10 pmOPO - SEA
2 stops20h 48mUnited Airlines
Deal found 4/18$1,556
dom. 4/217:10 pmSEA - OPO
3 stops32h 15mUnited Airlines
lun. 5/612:35 pmOPO - SEA
2 stops29h 12mUnited Airlines
Deal found 4/18$1,558

Cheap Seattle to Porto flights in April & May 2024

Find cheap flight options from Seattle to Porto specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,192,047 searches. Prices were last updated on abril 18, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to Porto in 2024. For more flight deals, be sure to check back very soon.
mié. 4/246:40 pmSEA - OPO
1 stop31h 05mTurkish Airlines
mié. 5/225:00 pmOPO - SEA
1 stop31h 45mTurkish Airlines
Deal found 4/17$926
dom. 4/216:40 pmSEA - OPO
1 stop37h 10mTurkish Airlines
lun. 5/64:50 pmOPO - SEA
1 stop31h 55mTurkish Airlines
Deal found 4/18$934
mié. 5/16:40 pmSEA - OPO
1 stop31h 05mTurkish Airlines
mar. 5/144:50 pmOPO - SEA
1 stop31h 55mTurkish Airlines
Deal found 4/17$950
mié. 5/15:55 amSEA - OPO
2 stops20h 45mDelta
mar. 5/145:00 amOPO - SEA
1 stop19h 40mDelta
Deal found 4/17$962
mié. 5/15:55 amSEA - OPO
2 stops20h 45mDelta
mar. 5/145:00 amOPO - SEA
2 stops23h 27mDelta
Deal found 4/17$972
mié. 5/1511:50 amSEA - OPO
2 stops19h 40mDelta
mié. 5/225:00 amOPO - SEA
1 stop19h 40mDelta
Deal found 4/17$989
mié. 5/1511:50 amSEA - OPO
2 stops19h 40mDelta
mié. 5/225:00 amOPO - SEA
2 stops21h 26mDelta
Deal found 4/17$999
mar. 4/305:05 pmSEA - OPO
1 stop21h 45mMultiple Airlines
mar. 5/74:30 pmOPO - SEA
1 stop28h 45mMultiple Airlines
Deal found 4/18$1,010
jue. 5/161:35 pmSEA - OPO
1 stop17h 55mDelta
jue. 5/235:00 amOPO - SEA
1 stop19h 40mDelta
Deal found 4/18$1,034

Seattle to Porto 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Porto in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,192,047 searches. Data last updated abril 18, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to Porto in 2024. For more flight deals, be sure to check back very soon.
lun. 11/119:55 amSEA - OPO
2 stops17h 40mMultiple Airlines
vie. 11/226:00 amOPO - SEA
2 stops23h 08mMultiple Airlines
Deal found 4/17$652
lun. 11/114:20 pmSEA - OPO
1 stop34h 30mDelta
mié. 11/2011:15 amOPO - SEA
1 stop31h 00mDelta
Deal found 4/17$666
lun. 11/111:50 pmSEA - OPO
1 stop17h 55mUnited Airlines
jue. 11/216:00 amOPO - SEA
2 stops24h 55mUnited Airlines
Deal found 4/17$667
lun. 11/1110:55 pmSEA - OPO
2 stops27h 55mDelta
lun. 11/1811:15 amOPO - SEA
1 stop31h 00mDelta
Deal found 4/17$669
mié. 11/1312:40 pmSEA - OPO
1 stop14h 10mDelta
lun. 11/1811:45 amOPO - SEA
1 stop32h 35mDelta
Deal found 4/17$673
lun. 11/114:20 pmSEA - OPO
1 stop34h 30mDelta
mar. 11/1911:45 amOPO - SEA
1 stop32h 35mDelta
Deal found 4/17$674
mar. 11/1210:55 pmSEA - OPO
2 stops27h 55mDelta
mar. 11/1911:45 amOPO - SEA
1 stop32h 35mDelta
Deal found 4/17$677
mié. 11/137:12 amSEA - OPO
2 stops20h 23mUnited Airlines
mié. 11/2012:30 pmOPO - SEA
1 stop31h 30mUnited Airlines
Deal found 4/17$678
mar. 11/122:35 pmSEA - OPO
1 stop23h 45mDelta
mar. 11/1911:45 amOPO - SEA
1 stop32h 35mDelta
Deal found 4/17$686

Seattle to Porto flights leaving soon

Find last-minute flight options from Seattle to Porto for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,192,047 searches. Data last updated abril 18, 2024.
Consider one of these great deals we found on last-minute flights from Seattle to Porto. To prevent any unwanted surprises, users should verify their flight info before booking.
mié. 4/246:40 pmSEA - OPO
1 stop31h 05mTurkish Airlines
mié. 5/225:00 pmOPO - SEA
1 stop31h 45mTurkish Airlines
Deal found 4/17$926
dom. 4/216:40 pmSEA - OPO
1 stop37h 10mTurkish Airlines
lun. 5/64:50 pmOPO - SEA
1 stop31h 55mTurkish Airlines
Deal found 4/18$934
mié. 5/16:40 pmSEA - OPO
1 stop31h 05mTurkish Airlines
mar. 5/144:50 pmOPO - SEA
1 stop31h 55mTurkish Airlines
Deal found 4/17$950
mié. 5/15:55 amSEA - OPO
2 stops20h 45mDelta
mar. 5/145:00 amOPO - SEA
1 stop19h 40mDelta
Deal found 4/17$962
mié. 5/15:55 amSEA - OPO
2 stops20h 45mDelta
mar. 5/145:00 amOPO - SEA
2 stops23h 27mDelta
Deal found 4/17$972
mar. 4/305:05 pmSEA - OPO
1 stop21h 45mMultiple Airlines
mar. 5/74:30 pmOPO - SEA
1 stop28h 45mMultiple Airlines
Deal found 4/18$1,010
mar. 4/309:45 pmSEA - OPO
2 stops29h 35mMultiple Airlines
mar. 5/74:30 pmOPO - SEA
1 stop28h 45mMultiple Airlines
Deal found 4/18$1,216
dom. 4/216:38 amSEA - OPO
2 stops19h 07mUnited Airlines
lun. 5/66:00 amOPO - SEA
2 stops24h 53mUnited Airlines
Deal found 4/18$1,469
dom. 4/2112:30 pmSEA - OPO
1 stop13h 15mUnited Airlines
lun. 5/612:10 pmOPO - SEA
2 stops20h 48mUnited Airlines
Deal found 4/18$1,556

One-way flights to Porto from Seattle

Search for one-way flight options from Seattle to Porto. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,192,047 searches. Data last updated abril 18, 2024.
Users in need of a one-way flight from Seattle to Porto can choose from these deals. Those needing a return flight from Seattle to Porto can use the search form above.
lun. 6/109:49 pmSEA - OPO
3 stops33h 11mMultiple Airlines
Deal found 4/17$489
lun. 7/811:00 pmSEA - OPO
3 stops48h 15mMultiple Airlines
Deal found 4/17$496
lun. 6/107:00 amSEA - OPO
2 stops40h 45mMultiple Airlines
Deal found 4/17$504
dom. 8/253:50 pmSEA - OPO
3 stops22h 00mMultiple Airlines
Deal found 4/18$523
mar. 8/273:50 pmSEA - OPO
3 stops22h 00mMultiple Airlines
Deal found 4/17$546
mar. 8/273:50 pmSEA - OPO
3 stops22h 00mMultiple Airlines
Deal found 4/18$551
lun. 7/811:00 pmSEA - OPO
2 stops25h 45mMultiple Airlines
Deal found 4/17$554
sáb. 6/87:00 amSEA - OPO
2 stops41h 00mMultiple Airlines
Deal found 4/17$568
dom. 6/97:00 amSEA - OPO
2 stops20h 45mMultiple Airlines
Deal found 4/17$605

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 3,192,047 searches. Data last updated abril 18, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$833 - $1,122

Route

Depart

Return

Price

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mié. 8/21

2 stops34h 45m

Porto

mar. 9/10

2 stops17h 46m

$833

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mié. 8/21

2 stops21h 30m

Porto

mar. 9/10

1 stop18h 05m

$849

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

dom. 5/5

1 stop31h 35m

Porto

mié. 5/15

1 stop31h 45m

$926

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mié. 8/21

1 stop18h 10m

Porto

mar. 9/10

1 stop16h 00m

$947

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

lun. 7/29

1 stop17h 55m

Porto

jue. 8/15

2 stops20h 54m

$993

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

lun. 10/14

1 stop19h 43m

Porto

mar. 10/22

2 stops17h 46m

$1,001

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mar. 10/8

1 stop13h 55m

Porto

mar. 10/29

2 stops34h 53m

$1,037

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mar. 6/25

2 stops20h 25m

Porto

mié. 7/3

2 stops24h 20m

$1,103

Seattle/Tacoma IntlPorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mar. 6/11

1 stop20h 30m

Porto

vie. 7/5

2 stops24h 20m

$1,122

Flights are sorted by cheapest first

Deals found on 4/17

When is the best time to 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 28, 2024.
Booking 19 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.
Search Deals

When is the cheapest time 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 April 14, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Porto flight should consider departing on Saturday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Porto by month

Plan your trip from Seattle to Porto by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Porto is currently $537 while a round-trip flight costs $979. Price data was last updated on April 14, 2024.

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 $1,027). 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.

January

$523

February

$581

March

$599

April

$728

May

$888

June

$1,027

July

$974

August

$870

September

$765

October

$695

November

$551

December

$645

Temperature and rainfall in Porto by month

Plan your trip to Porto by taking into account the average temperature and rainfall totals by month.

OPO

Temperature

48.2 - 68 °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 abril 18, 2024.
To help decide which airline to fly from Seattle to Porto, see what other customers have to say about Air France, United Airlines and KLM. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.3
Very good
1,491 reviews

Food

7.8

Crew

8.7

Entertainment

8.2

Comfort

8.1

Overall

8.3

Boarding

8.4

Reviews

1 / 10

I'm a long time SQ patron. For good reason. Had a similar trip last year and took another airline (at that time, price was the main factor). This time I took SQ as they had really good rates. No comparison. Dependable, reliable service and excellent aircraft. No issue with my special checked in item (a guitar that had to be handled differently) on my way to my destination (not this flight). In the previous mentioned other airline, they misplace my luggage upon arrival. After spending about an hour (with no effective help from that airline's agent), I managed to find it at another belt!

8.3
Very good
1,491 reviews
8.3
Very good
1,491 reviews

Food

7.8

Crew

8.7

Entertainment

8.2

Comfort

8.1

Overall

8.3

Boarding

8.4

Reviews

1 / 10

I'm a long time SQ patron. For good reason. Had a similar trip last year and took another airline (at that time, price was the main factor). This time I took SQ as they had really good rates. No comparison. Dependable, reliable service and excellent aircraft. No issue with my special checked in item (a guitar that had to be handled differently) on my way to my destination (not this flight). In the previous mentioned other airline, they misplace my luggage upon arrival. After spending about an hour (with no effective help from that airline's agent), I managed to find it at another belt!

8.1
Very good
11,104 reviews
8.3
Very good
1,491 reviews

Food

7.8

Crew

8.7

Entertainment

8.2

Comfort

8.1

Overall

8.3

Boarding

8.4

Reviews

1 / 10

I'm a long time SQ patron. For good reason. Had a similar trip last year and took another airline (at that time, price was the main factor). This time I took SQ as they had really good rates. No comparison. Dependable, reliable service and excellent aircraft. No issue with my special checked in item (a guitar that had to be handled differently) on my way to my destination (not this flight). In the previous mentioned other airline, they misplace my luggage upon arrival. After spending about an hour (with no effective help from that airline's agent), I managed to find it at another belt!

7.9
Good
1,646 reviews
8.3
Very good
1,491 reviews

Food

7.8

Crew

8.7

Entertainment

8.2

Comfort

8.1

Overall

8.3

Boarding

8.4

Reviews

1 / 10

I'm a long time SQ patron. For good reason. Had a similar trip last year and took another airline (at that time, price was the main factor). This time I took SQ as they had really good rates. No comparison. Dependable, reliable service and excellent aircraft. No issue with my special checked in item (a guitar that had to be handled differently) on my way to my destination (not this flight). In the previous mentioned other airline, they misplace my luggage upon arrival. After spending about an hour (with no effective help from that airline's agent), I managed to find it at another belt!

7.8
Good
2,095 reviews
8.3
Very good
1,491 reviews

Food

7.8

Crew

8.7

Entertainment

8.2

Comfort

8.1

Overall

8.3

Boarding

8.4

Reviews

1 / 10

I'm a long time SQ patron. For good reason. Had a similar trip last year and took another airline (at that time, price was the main factor). This time I took SQ as they had really good rates. No comparison. Dependable, reliable service and excellent aircraft. No issue with my special checked in item (a guitar that had to be handled differently) on my way to my destination (not this flight). In the previous mentioned other airline, they misplace my luggage upon arrival. After spending about an hour (with no effective help from that airline's agent), I managed to find it at another belt!

7.6
Good
1,825 reviews
8.3
Very good
1,491 reviews

Food

7.8

Crew

8.7

Entertainment

8.2

Comfort

8.1

Overall

8.3

Boarding

8.4

Reviews

1 / 10

I'm a long time SQ patron. For good reason. Had a similar trip last year and took another airline (at that time, price was the main factor). This time I took SQ as they had really good rates. No comparison. Dependable, reliable service and excellent aircraft. No issue with my special checked in item (a guitar that had to be handled differently) on my way to my destination (not this flight). In the previous mentioned other airline, they misplace my luggage upon arrival. After spending about an hour (with no effective help from that airline's agent), I managed to find it at another belt!

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.
  • Can I find flights from Seattle to Porto for under $900 on Cheapflights?

    Yes, there are multiple flights from Seattle to Porto for under $900. The cheapest flight booked recently is on SWISS for just $833, but on average you can expect to pay $980.

  • Are there last-minute flights available from Seattle to Porto for under $1,000?

    There are currently 19+ open flights from Seattle to Porto within the next 7 days for less than $1,000.

  • What are the cheapest airlines flying from Seattle to Porto round-trip?

    Our cheapest airline available from Seattle to Porto is SWISS. Our recent data shows that you can find tickets from as low as $833 on this airline. Additional options worth looking into are Delta and Turkish Airlines, starting at $849 and $926 round-trip. Users have found that SWISS is 28% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Porto one-way?

    $721 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Turkish Airlines and United Airlines, with prices starting from $737 and $768, respectively.

  • What are the most popular airlines that fly from Seattle to Porto?

  • What does SEA to OPO mean?

    This is defined as Seattle/Tacoma Intl Airport (SEA) and Porto Airport (OPO). Codes like Porto Airport are often used to just call airports uniquely.

  • Can I find deals for flights from Seattle to Porto that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to Porto flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to Porto with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Porto flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Seattle to Porto that include hotel bookings?

    Yes. In addition to deals on Seattle to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Porto.

  • Can I find deals for business class flights from Seattle to Porto?

    Yes. Cheapflights offers flight deals from Seattle to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Seattle to Porto that allow pets onboard?

    Many airlines flying from Seattle to Porto offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to Porto?

    Yes, you can often find last-minute deals on Seattle to Porto flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to Porto flight deals updated?

    The Seattle to Porto flight deals you see on this page were last updated on 4/17.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from Seattle to Porto

Discover the top 8 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 3,192,047 searches. Data last updated abril 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$544Average$725FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$700Average$1,081FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
KLMCheapest$740Average$1,068FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest$866Average$1,222FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest$880Average$1,261FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest$886Average$1,369FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Turkish AirlinesCheapest$914Average$976FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
Air FranceCheapest$1,116Average$1,562FlexibilityNo cancel feeOn-time77%
Search Air France flights

Search flights from Seattle to Porto by cabin class

Find flights from Seattle to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.

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Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Porto?

Deals for Seattle to Porto flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Porto?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Porto from Seattle.

Can Cheapflights find flights from Seattle to Porto with no change fees?

Yes, we can. To see specific flights from Seattle to Porto with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Porto become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Porto from Seattle today and book when prices fit your budget.

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