$180 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 9/24. 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
New York1 stop$397
Los Angeles
Los Angeles1 stop$582
Las Vegas
Las Vegas2 stops$1,223
Miami
Miami1 stop$436
San Francisco
San Francisco1 stop$613
Boston
Boston1 stop$497
Denver
Denver2 stops$777
Seattle
Seattle1 stop$848
Fort Lauderdale
Fort Lauderdale1 stop$694
Atlanta
Atlanta1 stop$649
Honolulu
Honolulu2 stops$874
Philadelphia
Philadelphia1 stop$921
New York
New York1 stop$397
Los Angeles
Los Angeles1 stop$582
Las Vegas
Las Vegas2 stops$1,223
Miami
Miami1 stop$436
San Francisco
San Francisco1 stop$613
Boston
Boston1 stop$497
Denver
Denver2 stops$777
Seattle
Seattle1 stop$848
Fort Lauderdale
Fort Lauderdale1 stop$694
Atlanta
Atlanta1 stop$649
Honolulu
Honolulu2 stops$874
Philadelphia
Philadelphia1 stop$921

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

Fri, Sep 19 - Wed, Sep 24
 Logo
10:40 pm - 9:40 pmOPO-JFK
28h 00m1 stop
 Logo
11:40 pm - 6:45 amJFK-OPO
26h 05m1 stop
Fri, Sep 19 - Mon, Sep 29
 Logo
10:00 pm - 9:40 pmOPO-JFK
28h 40m1 stop
 Logo
12:30 am - 8:20 amJFK-OPO
26h 50m1 stop
Wed, Sep 10 - Tue, Sep 16
Iberia Logo
12:20 pm - 6:55 pmOPO-JFK
11h 35m1 stop
Iberia Logo
5:30 pm - 11:40 amJFK-OPO
13h 10m2 stops
$442Iberia
Find Deal
Wed, Sep 10 - Tue, Sep 16
TAP AIR PORTUGAL Logo
6:05 pm - 9:05 pmOPO-EWR
8h 00mnonstop
TAP AIR PORTUGAL Logo
10:45 pm - 10:30 amEWR-OPO
6h 45mnonstop
$455TAP AIR PORTUGAL
Find Deal
Thu, Sep 4 - Wed, Sep 10
TAP AIR PORTUGAL Logo
6:05 pm - 9:05 pmOPO-EWR
8h 00mnonstop
TAP AIR PORTUGAL Logo
10:45 pm - 10:30 amEWR-OPO
6h 45mnonstop
$462TAP AIR PORTUGAL
Find Deal
Wed, Sep 17 - Sun, Sep 28
United Airlines Logo
6:00 am - 2:40 pmOPO-MIA
13h 40m1 stop
United Airlines Logo
4:53 pm - 9:45 amMIA-OPO
11h 52m1 stop
$491United Airlines
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Sat, Sep 13 - Sat, Sep 20
Iberia Logo
8:15 am - 2:45 pmOPO-JFK
11h 30m1 stop
Iberia Logo
4:45 pm - 7:35 amJFK-OPO
9h 50m1 stop
$491Iberia
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Wed, Oct 8 - Tue, Oct 21
KLM Logo
4:20 pm - 3:35 pmOPO-IAD
28h 15m1 stop
KLM Logo
5:25 pm - 10:15 pmIAD-OPO
23h 50m1 stop
$496KLM
Find Deal
Mon, Sep 1 - Mon, Sep 8
United Airlines Logo
12:10 pm - 7:37 pmOPO-LGA
36h 27m2 stops
United Airlines Logo
8:25 am - 9:35 amLGA-OPO
20h 10m2 stops
$505United Airlines
Find Deal
Thu, Jul 3 - Sat, Jul 12
KLM Logo
6:30 am - 1:20 pmOPO-JFK
11h 50m1 stop
KLM Logo
4:30 pm - 8:25 amJFK-OPO
10h 55m1 stop
$544KLM
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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $1,302 on average.

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 $506 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of round-trip tickets is $813 and $717 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$180
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 12% 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 14% 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 $771.

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 $698 one-way - $524 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 1363 reviews
8.4Crew
7.7Comfort
7.8Boarding
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.

Flight was on time. Boarding was smooth. Flight attendants were friendly and efficient. Entertainment system was broken for all passengers on the left side of the aisle. I would prefer if meals were not served on red eye flights. No one should need to dine at that time and it is disturbing for those passengers trying to sleep.

Gate agent did not hold flight for connection, provided no assistance to get new flight

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

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 schedules are better than some airlines. Their website is terrible, it doesn’t store any information so every time you fly you have to re-enter the data. The flight was late taking off but we still got to our destination on time.

Flight delayed by >1 hour. Long boarding involving riding a shuttle to the plane.

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.

Great to have power available for every seat in Premium Economy. I do wish the WiFi was less expensive. It was 23-24 Euros for the flight for one device. And there were times it was unavailable.

I’m very mad because I paid an extra $105 to change seats to an exit row with more leg room. The app clearly showed a gap in between the seats in the row I changed my seat to and I paid for it. When I boarded the plane, it wasn’t an exit row seat and no more room than my original seat. I feel like I was ripped off $105.

The crew on AA international flights in my experience are generally lazy, rude, and inefficient. These guys did not disappoint.

I had a great experience , crew was great and enjoyed the entertainment options I will be booking my next International trip with them .

Front desk was closed at 6 pm, I was unable to get my boarding pass and as such missed my connecting flight home.

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