$271 Find Cheap Flights from Porto to the United States

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Porto to the United States departing on 9/8. 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.
1 adult
1 adult, Economy

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Flights Deals

Best United States Flight Deals from Porto

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
New York
Newark1 stop$423
Los Angeles
Los Angeles1 stop$617
Las Vegas
Las Vegas1 stop$799
Miami
Miami1 stop$495
San Francisco
San Francisco1 stop$608
Boston
Bostonnonstop$455
Denver
Denver2 stops$850
Seattle
Seattle3 stops$767
Fort Lauderdale
Fort Lauderdale1 stop$547
Atlanta
Atlanta1 stop$697
Honolulu
Honolulu2 stops$1,016
Philadelphia
Philadelphia1 stop$751
New York
Newark1 stop$423
Los Angeles
Los Angeles1 stop$617
Las Vegas
Las Vegas1 stop$799
Miami
Miami1 stop$495
San Francisco
San Francisco1 stop$608
Boston
Bostonnonstop$455
Denver
Denver2 stops$850
Seattle
Seattle3 stops$767
Fort Lauderdale
Fort Lauderdale1 stop$547
Atlanta
Atlanta1 stop$697
Honolulu
Honolulu2 stops$1,016
Philadelphia
Philadelphia1 stop$751

Cheap Flights from Porto to the United States

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to the United States that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Porto to the United States

Wed, Oct 1 - Mon, Oct 6
 Logo
9:40 am - 9:00 pmOPO-EWR
16h 20m1 stop
 Logo
11:00 pm - 4:45 pmEWR-OPO
12h 45m1 stop
Wed, Sep 10 - Wed, Oct 15
TAP AIR PORTUGAL Logo
6:10 pm - 8:45 pmOPO-BOS
7h 35mnonstop
TAP AIR PORTUGAL Logo
11:05 pm - 10:45 amBOS-OPO
6h 40mnonstop
$455TAP AIR PORTUGAL
Find Deal
Wed, Sep 10 - Sun, Sep 14
Air Europa Logo
7:35 am - 11:00 pmOPO-JFK
20h 25m1 stop
Air Europa Logo
10:05 pm - 6:50 amJFK-OPO
27h 45m1 stop
$470Air Europa
Find Deal
Wed, Sep 10 - Tue, Sep 16
Air Europa Logo
4:05 pm - 11:00 pmOPO-JFK
11h 55m1 stop
Air Europa Logo
10:05 pm - 7:20 pmJFK-OPO
16h 15m1 stop
$471Air Europa
Find Deal
Wed, Sep 10 - Tue, Sep 16
Iberia Logo
8:15 am - 6:55 pmOPO-JFK
15h 40m1 stop
Iberia Logo
5:30 pm - 11:40 amJFK-OPO
13h 10m2 stops
$474Iberia
Find Deal
Sat, Aug 30 - Sun, Sep 7
United Airlines Logo
6:00 am - 2:40 pmOPO-MIA
13h 40m1 stop
United Airlines Logo
4:56 pm - 9:45 amMIA-OPO
11h 49m1 stop
$497United Airlines
Find Deal
Thu, Sep 11 - Sun, Sep 28
United Airlines Logo
6:00 am - 11:20 amOPO-MIA
34h 20m2 stops
United Airlines Logo
6:45 am - 9:45 amMIA-OPO
22h 00m2 stops
$502United Airlines
Find Deal
Mon, Sep 22 - Sun, Sep 28
Iberia Logo
8:15 am - 3:05 pmOPO-MIA
11h 50m1 stop
Iberia Logo
9:55 pm - 3:55 pmMIA-OPO
13h 00m1 stop
$517Iberia
Find Deal
Wed, Aug 27 - Thu, Sep 4
KLM Logo
4:20 pm - 10:50 pmOPO-JFK
11h 30m1 stop
KLM Logo
4:30 pm - 8:25 amJFK-OPO
10h 55m1 stop
$529KLM
Find Deal
Wed, Aug 27 - Thu, Sep 4
KLM Logo
4:20 pm - 10:50 pmOPO-JFK
11h 30m1 stop
KLM Logo
11:30 pm - 3:30 pmJFK-OPO
11h 00m1 stop
$530KLM
Find Deal
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KAYAK's insights & trends for Porto to the United States flights

Get data-powered insights and trends into flights from Porto to the United States to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Porto to the United States flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Porto to the United States.

The cheapest ticket to the United States from Porto found in the last 72 hours was to New York, at $330 round-trip. The most popular route is from Porto (OPO) to Newark Airport (EWR), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $330.

Can I save money by flying with a layover from Porto to the United States?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $1,403, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Porto to the United States?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Porto to the United States, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Porto to the United States is February, when tickets cost $509 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of round-trip tickets is $803 and $705 respectively.

How far in advance should I book a flight from Porto to the United States?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Porto to the United States, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Porto to the United States, you should book around 9 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.


Good to know

Low seasonJanuary
High seasonAugust
Cheapest flight$271
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from Porto to New York John F Kennedy Airport

FAQs - booking United States flights

  • How does KAYAK find such low prices on flights from Porto to the United States?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Porto to the United States.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Porto to the United States?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Porto to the United States is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Porto to the United States?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Porto to the United States with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Porto to the United States?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Porto to the United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to the United States?

    The cheapest time of day to fly to the United States is generally at night, when round-trip flights cost $542 on average. Morning departures are around 13% more expensive than evening flights, on average. The most expensive time of day to fly to the United States is generally in the morning, which is peak travel time and where the average cost of a ticket is $762.

Top tips for finding cheap flights to the United States

  • Looking for a cheap flight? 25% of our users found tickets from Porto to the following destinations at these prices or less: Newark $697 one-way - $581 round-trip

Reviews of the top 5 airlines serving from Porto to the United States

 
Need help choosing which airline to fly with from Porto to the United States? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1365 reviews
7.8Boarding
7.7Comfort
8.4Crew
7.1Entertainment
7.2Food
Airline reviews

Klm start boarding while somw air issue in the plan

8.0 ExcellentA, Jun 2025AMS - YYZ
Read more KLM reviews

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

The facilities at PDL are absolutely appalling during a 4.5-hour connection. Passengers from multiple flights were crammed into a small area with insufficient seating and only a snack bar. The only bathroom was unisex, with one stall for men and another for women side by side. This is for hundreds of passengers. The connecting aircraft from PDL to JFK was downgraded/switched out to an Economy Class-only configuration without explanation, even though the aircraft with Comfort Class we arrived from FNC on remained at the stand. Those who paid for Comfort Class could not enjoy the better seating or catering. Food and drink aboard was sub-par. I would qualify it as one of our worst travel experiences in years.

The crew was great. The only problem is that electrical outlets were not working in what seems to be a half of the rows on the plane. Considering that passengers are asked not to use power banks, this leaves us out in the blue without any entertainment option.

Reasonably comfortable. We were about an half an hour late. But no personal impact. Seats upfront have a good amount of recline, but do not lay down flat. Food and drink can be improved. There are no soft drinks available on the flights. Water, juices, and wines are provisioned.

Flight on time. Staff pleasant and responsive. Food could be much better. Snack before landing was a few dry crackers and a drink. Nothing else. There was a very lumited selection of beverages available on a 7 hour flight. No soft drinks, even in the front cabin.

Delayed departure of one hour and half, inflight entertainment NOT functioning. Plane did not crash and I arrived alive, so I guess it was a good flight.

This was a long flight - 6 hours - and nothing is truly comfortable for that long... but the flight crew was friendly and attentive. The airport in the Azores is small but we weren't there long enough to explore any amenities.

There is one flight a day and it was canceled with no explanation

Flight was ok. Food on way there great a pork dish way back tuna and pasta was not good. Flight attendants were great. Wish they had more soda options like ginger ale seltzer water. Good experience overall. Worst part of trip was car rental Klass company car broke down we were on side of road late night 4 hours awful awful experience all they wanted was 500 euros for help to come absolutely horrible experience we were scared side of highway they offered zero help!

Coming from USA it was nice to be treated nice for a change. Even though our flight was pretty short we were served breakfast. On time flight with very caring staff. Please teach American carriers how to treat people.

More space between seats and in bathroom. I don’t think there was any entertainment offered. If there was, I wasn’t aware.

I love flying with United. Unfortunately, I flew on an older plane with minimal upgraded technology (no Bluetooth functionality or handy charging ports). Otherwise, the flight was great and even arrived early.

They changed my seats after I checked in and I was stressed from the time I saw that information until just before boarding, when the gate attendant fixed it, but it shouldn't have happened. And if it couldn't be prevented, then the people on the phone I spoke with should have done something to help, which they did not, nor did they offer me compensation, just meaningless apologies.

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

Very rough getting into denver. my kid threw up it was so rough.

We were given vouchers we couldn’t use with a 5.5 hour delay

We had a very long diversion and our food voucher didn’t work because the restaurants were closed

Cramped seat even in economy plus seat 10A. Over booked flight, no space for the bags

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Was the best airplane ✈️ ever that I never see I will traveling again again with u guys.

Flight was delayed on 6/20 to miss international connection. Next flight out was 24 hours later. Not acceptable.

Flight from FNC to OBO was cancelled. We were rebooked to Lisbon later in the day. It was inconvenient but it worked out ok in the end.

Terrible flight attendant attitude. Average 3-star hotel employee has better hospitality skills. Business class seats are literally a joke. TAP executives should ride business class in other airlines to develop some rudimentary sense of what business class is.

Very pleasant flight, crew was very nice. The flight was really smooth, big plane. The seats are kind of close together, so comfort was just OK. The boarding process on the way back to New York was a little chaotic. It took a long time.There were no announcements, no loudspeaker just one staff yelling out of instructions and a lot of people crowding in before their term to board. So that could really be improved a lot.

The crew was very nice. The food was good. The entertainment on the way back to Miami wasn’t as good as the flight over. I wanted to watch Wicked but on the way over from Miami to Lisbon but the screen didn’t work. On the way from Lisbon to Miami Wicked wasn’t an option. Liked the option to check out overhead carry on with our checked luggage Overall the flights were very good. I would fly TaP again

Boarding went fast. Lisbon's gates are too small for the flights they serve.

Great pilot, textbook landing in madeira. Everything else, from booking to checkin, plane quality, seat amenities, crew engagement, and overall experience were significantly below standard. I WOULD NOT FLY TAP IF THERE IS ANY OTHER OPTION.

Worst: long walk to baggage claim Best: left on time

Got in on time. Food was the worst ever. Comfort was terrible. Check in was incredibly bad.

The flight was over two hours delayed. The aircraft was somewhat dated.

Luggage arrived damaged and protective plastic was lost. I need customer service to contact me or the number for customer service. Thanks.

Provided a good service and I will use it again. Thanks,

Boarding was not well coordinated. I asked twice at the Level check-in area about the MIA flight. At no point did they say the check-in would be at another counter. Fortunately, another passenger was equally confused and got the REAL story from the airport’s info center. Further, my minor child was tagged “SSSS” on their boarding pass. Level should have notified TSA about him being a minor. Instead, the entire family went through the SSSS process, not just our son. When his name was called out at the gate, it was announced in Spanish. No English announcement was made. The food on board was bearable. The crew was adequate, despite not being Level/Iberia crew (Level contracted out our flight to “World2Fly Airlines” - a company I have never heard of!). The onboard entertainment was very limited. They did not even offer a flight tracker option. Nor were music selections offered. Like TAP and Aer Lingus, I will think twice before booking Level ever again.

This ticket was canceled and I did not find out until it was time to check in. I believe the vendor is at fault. Cheap tickets.com I would like to elaborate on the situation to kayak. Can you give me an email address?

You get what you pay for. In general I like the service and flight attendants.

Excellent! Outstanding customer service, the best service I have received. Food was served, dinner, snacks, beverages, crew was there to greet you. 10/10

Service and food were excellent, could have been more info in English.

Charging $300 to be able to pick a seat next to your wife was nothing less than extortion.

My carry-on bag was taken from me when I boarded. It was checked through to London at no charge. It took a big of shuffling, but I was glad not to need to mind it until baggage claim.

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