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CA $786 Cheap Flights from Porto (OPO) to Buffalo (BUF)

View CA $786 flight on Mon, Sep 21, 2026Opens in a new window

Popular airlines from Porto Airport (OPO) to Buffalo Niagara Intl. Airport (BUF)

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Cheap flights from Porto (OPO) to Buffalo (BUF)

Prices were available within the past 7 days and start at CA $786 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) cost?
You can find one-way and return flights from OPO to BUF with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when OPO to BUF ticket fares go up or down.
What is the cheapest month to fly from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The cheapest months to fly from OPO to BUF are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
Enter OPO to BUF and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
To find a cheap flight from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
There are approximately 24 connecting flights per day from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.). Some common connection points include Adolfo Suarez Madrid-Barajas (MAD), Humberto Delgado (LIS), and Frankfurt Intl. (FRA).
What is the earliest flight from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The earliest flight from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) typically departs around 5:00 AM. This route is operated by KLM and Delta. This is a seasonal service, active in September. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
You'll typically find the most flights from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) on a Saturday, with around 35 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Iberia, Lufthansa, and TAP Portugal.
What are the most popular departure times for flights from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The most popular departure times for flights from Dr. Francisco de Sa Carneiro (OPO) to Buffalo Niagara Intl. (BUF) are between 12pm and 3pm. Many major carriers, including Delta, Air Canada and Iberia, offer flights during this window. Many travelers prefer this time as it allows for a relaxed morning before heading to the airport, and you'll arrive in Buffalo in the afternoon.
How long does it take to fly from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
There are no nonstop flights from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.). Flights with one stop typically take around 20 hours 30 minutes, covering a distance of approximately 5,610 kilometres. Flights with two or more stops usually take about 18 hours. Keep in mind that actual travel times can vary due to factors like layover duration, routing, and weather conditions.
Can you fly business or first class from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
Yes, you can fly business class between OPO and BUF. Airlines that offer business class service on this route include:

  • Iberia
  • Lufthansa
  • Turkish Airlines
  • Air Canada
  • Austrian Airlines
  • United

How do I earn miles on a Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight with Expedia?
It's easy to earn miles on a Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Buffalo, NY (BUF) from Porto (OPO)?
If you're planning to travel to Buffalo from Dr. Francisco de Sa Carneiro (OPO), you can fly directly into Buffalo Niagara Intl. (BUF). Some flights may connect through major hubs like Adolfo Suarez Madrid-Barajas (MAD), John F. Kennedy Intl. (JFK), or Frankfurt Intl. (FRA) before reaching Buffalo. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) at the last minute?
Typically, booking a last minute flight from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight and hotel package?
Securing a Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
If you booked your Porto (OPO-Dr. Francisco de Sa Carneiro) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Dr. Francisco de Sa Carneiro
Destination airport
Buffalo Niagara Intl.
Distance
5576 km

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Porto to Buffalo Flights

The easy way to book your flights from Porto to Buffalo 

With Expedia, it’s simple to find and book flights to Buffalo from Porto whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Buffalo Niagara Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Porto to Buffalo today, tomorrow, or this week.  

 

Save dollars with cheap flights from Dr. Francisco de Sa Carneiro, OPO to Buffalo Niagara Intl., BUF 

Sort your search results by price to find great deals on your flight from Porto to Buffalo—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Buffalo from Porto currently is just rising to .  

Here are more money-saving tips: 

  • Fly in when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Buffalo  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Buffalo from Porto 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Buffalo with Expedia today.

Porto to Buffalo Flights

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*Available to Expedia members.