HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$577+ 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
SWF — OPO
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Stewart 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 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 December 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/25. 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 2/811:48 amSWF - OPO
2 stops18h 02mMultiple Airlines
Deal found 12/25$577

Find 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 December 26, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Popular in

December

Cheapest in

February

Average price

$1,489
Provider with most accurate pricing for New Windsor Stewart-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for New Windsor Stewart-Porto flights.
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($128 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 26, 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

Sun 2/8

11:48 am-10:50 am

2 stops18h 02m

$577

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

  • 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 June is currently the most expensive (average of $589). 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 June is currently the most expensive (average of $589). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Stewart to Porto

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Lisbon flights
Newark to Lisbon flights
LaGuardia to Lisbon flights
Newark to Porto flights
John F Kennedy Intl to Porto flights
John F Kennedy Intl to Ponta Delgada flights
LaGuardia to Porto flights
Newark to Ponta Delgada flights
John F Kennedy Intl to Funchal flights
Newark to Funchal flights
LaGuardia to Funchal flights
Newark to Faro flights
John F Kennedy Intl to Faro flights
LaGuardia to Ponta Delgada flights
LaGuardia to Faro flights
White Plains to Lisbon flights
Buffalo to Lisbon flights
Newark to Lajes flights
John F Kennedy Intl to Lajes flights
Syracuse to Lisbon flights
Albany to Lisbon flights
LaGuardia to Lajes flights
Rochester to Porto flights
Ithaca to Lisbon flights
John F Kennedy Intl to Vila do Porto flights
John F Kennedy Intl to Pico Island flights
Rochester to Lisbon flights
Buffalo to Porto flights
Albany to Porto flights
John F Kennedy Intl to Horta flights
Syracuse to Funchal flights
Stewart to Faro flights
Newark to Horta flights
Syracuse to Porto flights
Buffalo to Funchal flights
Binghamton to Lisbon flights
White Plains to Ponta Delgada flights
Islip to Porto flights
Islip to Lisbon flights
Stewart to Lisbon flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.