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$640+ Cheap flights from New Windsor (SWF) 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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
SWF — OPO
Dec 15 — Dec 221
Mon 12/15
Mon 12/22
1 adult, Economy
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Cheap flight deals from Stewart to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Stewart (SWF) 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 November 15, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Popular in

December

Cheapest in

February

Average price

$688
Provider with most accurate pricing for New Windsor Stewart-Porto flight deals.
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Provider most trusted by Cheapflights users for New Windsor Stewart-Porto flights.
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Stewart to Porto

One-way flights from Stewart to Porto
Search for one-way flight options from Stewart to Porto. Find affordable one-way fares based on user searches. Data last updated November 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/14. 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 12/2311:43 amSWF - OPO
2 stops38h 22mMultiple Airlines
Deal found 11/14$640
This Kiwi.com deal was found by Cheapflights users on 11/14. 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 12/228:25 pmSWF - OPO
3 stops41h 55mMultiple Airlines
Deal found 11/14$718
This Kiwi.com deal was found by Cheapflights users on 11/13. 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.
Fri 12/198:11 pmSWF - OPO
3 stops45h 44mMultiple Airlines
Deal found 11/13$773

Cheapflights Fare Finder

 
Customize your flight search to find flights from Stewart 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 November 15, 2025.
Use the filters below to find and compare flights from New Windsor to Porto that are best for you.

Fly from

Stewart

Fly to

Porto

Route

Depart

Return

Price

New WindsorPorto

SWF - OPO

SWFOPO

New Windsor Stewart

Tue 12/23

11:43 am-7:05 am

2 stops38h 22m

$640

New WindsorPorto

SWF - OPO

SWFOPO

New Windsor Stewart

Mon 12/22

8:25 pm-7:20 pm

3 stops41h 55m

$718

New WindsorPorto

SWF - OPO

SWFOPO

New Windsor Stewart

Fri 12/19

8:11 pm-10:55 pm

3 stops45h 44m

$773

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/14

  • Most accurate provider: When it comes to deals on New Windsor-Porto flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on New Windsor-Porto flight deals on Cheapflights vs. Expedia 90-95% of the time. Price accuracy is based on data collected from New Windsor-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on New Windsor-Porto flights, Cheapflights users trust Expedia the most. Expedia 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 New Windsor-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 Stewart to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Stewart with our price prediction graph.
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 New Windsor to Porto

What is the cheapest month to book a flight from New Windsor to Porto?

Currently, October is the cheapest month in which you can book a flight from New Windsor to Porto (average of $383). Flying from New Windsor to Porto in July is currently the most expensive (average of $634). 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.

Related info for your journey

Find useful and relevant information for your journey from Stewart 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 deals for flights from Stewart to Porto that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Stewart 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.

  • What is the cheapest month to book a flight from New Windsor to Porto?

    Currently, October is the cheapest month in which you can book a flight from New Windsor to Porto (average of $383). Flying from New Windsor to Porto in July is currently the most expensive (average of $634). 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.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra
Vila Nova de Gaia

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