CA $449 Cheap Flights from Buffalo (BUF) to Porto (OPO)

View CA $449 flight on Tue, Oct 20, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at CA $449 for one-way flights and CA $1,120 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Aug 18 - Tue, Sep 8
BUF
Buffalo
OPO
Porto
CA $1,120 Roundtrip, found 3 days ago
CA $1,120
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 18 from Buffalo to Porto, returning Tue, Sep 8, priced at CA $1,120 found 3 days ago
United
Tue, Aug 18 - Mon, Sep 7
BUF
Buffalo
OPO
Porto
CA $1,121 Roundtrip, found 3 days ago
CA $1,121
Roundtrip
found 3 days ago
Select United flight, departing Tue, Aug 18 from Buffalo to Porto, returning Mon, Sep 7, priced at CA $1,121 found 3 days ago
Air Canada
Sun, Aug 16 - Fri, Aug 28
BUF
Buffalo
OPO
Porto
CA $1,125 Roundtrip, found 3 days ago
CA $1,125
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sun, Aug 16 from Buffalo to Porto, returning Fri, Aug 28, priced at CA $1,125 found 3 days ago
Delta
Tue, Aug 18 - Fri, Sep 4
BUF
Buffalo
OPO
Porto
CA $1,129 Roundtrip, found 3 days ago
CA $1,129
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 18 from Buffalo to Porto, returning Fri, Sep 4, priced at CA $1,129 found 3 days ago
Delta
Sun, Aug 16 - Fri, Aug 28
BUF
Buffalo
OPO
Porto
CA $1,158 Roundtrip, found 3 days ago
CA $1,158
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Aug 16 from Buffalo to Porto, returning Fri, Aug 28, priced at CA $1,158 found 3 days ago
American Airlines
Sun, Aug 16 - Fri, Aug 28
BUF
Buffalo
OPO
Porto
CA $1,166 Roundtrip, found 3 days ago
CA $1,166
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sun, Aug 16 from Buffalo to Porto, returning Fri, Aug 28, priced at CA $1,166 found 3 days ago
United
Tue, Aug 18 - Sat, Sep 5
BUF
Buffalo
OPO
Porto
CA $1,212 Roundtrip, found 3 days ago
CA $1,212
Roundtrip
found 3 days ago
Select United flight, departing Tue, Aug 18 from Buffalo to Porto, returning Sat, Sep 5, priced at CA $1,212 found 3 days ago
United
Sun, Aug 23 - Tue, Sep 8
BUF
Buffalo
OPO
Porto
CA $1,229 Roundtrip, found 3 days ago
CA $1,229
Roundtrip
found 3 days ago
Select United flight, departing Sun, Aug 23 from Buffalo to Porto, returning Tue, Sep 8, priced at CA $1,229 found 3 days ago
Delta
Sun, Aug 16 - Fri, Aug 28
BUF
Buffalo
OPO
Porto
CA $1,280 Roundtrip, found 3 days ago
CA $1,280
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Aug 16 from Buffalo to Porto, returning Fri, Aug 28, priced at CA $1,280 found 3 days ago
Swiss International Air Lines
Wed, May 13 - Mon, May 18
BUF
Buffalo
OPO
Porto
CA $1,335 Roundtrip, found 6 days ago
CA $1,335
Roundtrip
found 6 days ago
Select Swiss International Air Lines flight, departing Wed, May 13 from Buffalo to Porto, returning Mon, May 18, priced at CA $1,335 found 6 days ago

Alternative airports near Porto

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Dr. Francisco de Sa Carneiro OPO. Cheapest and Closest option available. Average driving time to city centre is 14 minutes. Flights from CA $1,739
OPO
Dr. Francisco de Sa Carneiro
CheapestClosest
Average driving time to city centre14 min
Flights from CA $1,739

Frequently asked questions

How do I find cheap flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
To find a cheap flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro), 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
There are approximately 27 connecting flights per day from Buffalo Niagara Intl. (BUF) to Dr. Francisco de Sa Carneiro (OPO). Some common connection points include John F. Kennedy Intl. (JFK), Logan Intl. (BOS), and O'Hare Intl. (ORD).
What is the earliest flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
The earliest flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) typically departs at approximately 5:40 AM local time. This service is operated by B6 and TK and is a seasonal service active in June. An early departure like this can help you maximize 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
You'll typically find the most flights from Buffalo Niagara Intl. (BUF) to Dr. Francisco de Sa Carneiro (OPO) on a Saturday, with around 45 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Delta Air Lines, United Airlines, and American Airlines. Saturday offers notably more flight options compared to other days, with about 23% more flights than on a Wednesday.
What are the most popular departure times for flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
The most popular departure times for flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) are in the evening, from 6pm to 9pm. About 29% of passengers prefer this time. Many major carriers, including United Airlines, Delta and Air France, offer flights during this window. This timing works well because you can finish your day before heading to the airport, and you'll arrive at your destination ready to start your trip.
How long does it take to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
Flying from BUF to OPO with a connection usually takes about 9 hours 50 minutes, traveling roughly 3,486 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
Select the "Business class" and "First class" filters when looking for BUF to OPO flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) flight with Expedia?
It's easy to earn miles on a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) 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 Porto from Buffalo Niagara Intl. (BUF)?
From Buffalo Niagara Intl. (BUF), you can fly into Dr. Francisco de Sa Carneiro (OPO) to reach Porto. Some flights may connect through major hubs like O'Hare Intl. (ORD), John F. Kennedy Intl. (JFK), Washington Dulles Intl. (IAD) before reaching Porto. 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) at the last minute?
Typically, booking a last minute flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) flight and hotel package?
Securing a Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro)?
If you booked your Buffalo, NY (BUF-Buffalo Niagara Intl.) to Porto (OPO-Dr. Francisco de Sa Carneiro) 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
Buffalo Niagara Intl.
Destination airport
Dr. Francisco de Sa Carneiro
Roundtrip price
CA $1,119
Distance
5576 km

Book with confidence

Buffalo to Porto Flights

The easy way to book your flights from Buffalo to Porto 

With Expedia, it’s simple to find and book flights to Porto from Buffalo 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 Dr. Francisco de Sa Carneiro, 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 Buffalo to Porto today, tomorrow, or this week.  

 

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

Sort your search results by price to find great deals on your flight from Buffalo to Porto—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Porto from Buffalo currently is just CA $1,120 rising to CA $1,335.  

Here are more money-saving tips: 

  • Fly in August when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Porto  
  • 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 Porto from Buffalo 

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 Porto with Expedia today.

Buffalo to Porto Flights

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