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Find cheap flights from Porto to the United States from $291

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 10/21. 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
0 bags
Thu 7/4
Thu 7/11

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Best United States Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

New York
Newark1 stop$406
Los Angeles
Los Angeles1 stop$612
Las Vegas
Las Vegas1 stop$668
Miami
Miami1 stop$457
San Francisco
San Francisco2 stops$617
Boston
Boston1 stop$569
Denver
Denver1 stop$810
Seattle
Seattle1 stop$983
Fort Lauderdale
Fort Lauderdale2 stops$476
Atlanta
Atlanta2 stops$896
Honolulu
Honolulu2 stops$1,550
Philadelphia
Philadelphia1 stop$758

Good to know

Low season

January

High season

August

Cheapest flight

$291
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from Porto to Boston

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 to the United States from Porto 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 to the United States with an airline and back to Porto 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 to the United States from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

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 $519 one-way - $676 round-trip
  • Morning departure is around 3% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

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.
7.4
United AirlinesOverall score based on 10732 reviews
8.1Crew
7.1Entertainment
6.7Food
7.7Boarding
7.2Comfort
Airline reviews

My window shade didn’t work. So I missed coming into my city. ☹️

10.0 ExcellentBrock, Jun 2024MCO - FLL
Read more about United Airlines reviews

My window shade didn’t work. So I missed coming into my city. ☹️

Food was very very bad! Same flight from US was amazing with great food but the food prepared for the flight from Cape Town to New York was not eatable. The crew also did not smile once. They all looked like it was a shift they had not signed up for but were forced to take. :(

Flight was delayed in the gate by 5 hours and ultimately cancelled- rebooking service by United agents was terrible

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Not worth the price of premium class ticket paid, felt more like steerage.

I have to wait for plane in Denver for three hours. I don’t receive my luggage in Denver. I come back home without the luggage and I wait till next day to see my luggage again. Not really good experience with United airlines. I’m sorry to say that.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

I had a great flight. Everything went smoothly and the flight arrived early.

Everything was great except for one thing. I was sitting in seat 1L with plenty of windows. Because we couldn’t sit next to each other, my husband was in 2L with only one window that he had to almost turnhis neck around to look out. Therefore, the window position with 1/2 of the “window” seats in business class is not optimal

Flight was late due to mechanical, had to spend night in hotel. Experience disembarking plane was poor, United did little for passengers except what they were required to do by law.

Terrible. I didn’t fly and I had an important meeting the next day.

Equipment swap led to 2+ hour delay on international flight. And to top it off, boarding took forever.

Wretched scheduling - they got themselves into a critical crew situation and didn’t try to address it until 15 minutes before they had to cancel my flight

They cancelled two flight and got us onto another airline, which was also delayed.

Nothing, terrible travel experience due to weather and maintenance delays and was left stranded in Austin.

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

28 hour delay at Fort Worth/Dallas airport, part due to weather which was unavoidable, but various other reasons - no pilot, no fa, mechanical problem, plane too small, too big, crew out of flying time, seat configuration problems.... endless and hourly updates with a different excuse. Finally told us about 3.00 am, that the flight was delayed to hours later.

Experience was bad. 3.5 hour delay for a 2.5 hour trip. There was no r Transparency about the reason for the delay and it was done 30 mins at a time.

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

There were delays on both ends. It made it less than excellent. This plane was great though

Some crew were very helpful. Could be better food choices. Should be more leg room even in economy.

As a disabled passenger the arrangements for getting me to the plane and onto the plane were excellent as was the reception and arrangements at Chicago.

Flight home was great. But, as should have been expected, Newark Liberty airport sucked.

Food was low quality as well as quantity; I ordered vegetarian. We waited 35 MINUTES for the first bag to arrive after landing.

Ability to select seating would be nice. We were family of three and they had us seated back to back and one of us on the other side of the plane??? That is pretty goofy. Especially when tickets were placed two months in advance.

It was not Iberia. It was with United. It was great!!!

We had a seat that would not function. No Wifi or inflight entertainment was available. Food was very poor. Attendants were very accommodating and apologized for the problems.

They offered several meals and snacks, the crew was very friendly and kind. There was a broad selection of movies, shows, and games. I was impressed!

My son and I are 193 cm tall. We had reserved and paid for seats with extra leg room towards the front of the cabin. The day of the flight, we learned that Iberia had changed aircraft. We were assigned regular seats way back in the cabin. When we landed from our first leg we spoke with agents at the gate and we were told that they couldn’t improve our seats because the flight was full.

Our flight was delayed by 2-hrs but I understand it was beyond the scope of the crew members

Dreadful - queued to get onto a bus, stood for 10 minutes on the bus, drove to the plane, stood for another 25 minutes on the bus outside the plane. When allowed on we could only board from the front & were seated in the furthest row back. The second bus was allowed to board from the back so chaos ensued!. The flight was an hour late - nobody said why, nobody apologised. On arrival at Heathrow we stood for nearly 30 minutes before being allowed off - again with no explanation,

Efficiency was great - on-time takeoff and landing. Baggage arrived at destination (there's always slow baggage handling in Boston.) TAP food is spartan - bring your own. But the efficiency of the airline more than makes up for the mediocre cuisine.

On-time flight. Nothing out of the ordinary. The food offering upfront could be better.

Delayed takeoff was inconvenient. We should have boardrd later. Coffee/ beverage service on a 7:30 flight would have been good.

Flight from Lisbon to Barcelona was ok. Business flight Boston to Lisbon was awful. Attendants should pay more attention to Business Passengers and not be so stingy with water. Worse Business Flight I have ever taken. Food was awful. Cramped for space.

Adequate. You get what you pay for. Absolutely no frills but a cost effective way to travel between European countries.

Disastrous boarding. Entered air bridge only to descend stairs and enter a bus. Plane had insufficient storage, was old and chair recline was damaged. Air stewardess was sullen.

I wish to bring to your attention an incident involving a flight attendant that occurred on my recent journey. The attendant displayed a lack of courtesy, which was concerning. For instance, after accidentally spilling water on a passenger, the attendant dismissed the situation rather than offering a proper apology. Additionally, when I handed over my trash, the attendant reacted negatively because I placed a paper cup on the tray, she told me this doesn't go here and threw it back on my table. It was apparent that she was experiencing a challenging day, which unfortunately impacted the service provided to myself and other passengers. While I understand that everyone can have an off day, it is essential for customer-facing staff to seek support to manage personal stress without it affecting their professional responsibilities.

The flight crew was good, the flight itself was quick and comfortable

Boarding was late by 30 min due to a bus missing to take us to the plane... And then the flight was delayed by about 90 minutes, in a 60 min flight

Awful. Flight delayed and we missed our long flight to Rome. It has been a nightmare and we have still not arrived. It was NOT a weather delay, just poor planning by AA

My seat was in a good row. In our section it was the first row. But it was difficult tooperate seat entertainment features > table, screen, even though I often fly.

Boarding was as fast and efficient as possible. The flight crew were amazing and extremely friendly. We enjoyed our flight.

There was nothing to like besides the crew. The comfort of the airplane was poor (seat did not work properly and it was not comfortable). The “entertainment” system did not work! On a flight that last nearly eight hours, (which is advertised as having excellent entertainment options), that is unacceptable! Passengers should have been given free WiFi for the flight. The food served on the flight was below school lunch grade food. (With one exception, the ice cream snack). The chicken entree was tough and nearly impossible to cut and eat. The “pizza” served later in the flight was worse. The chicken pizza had a dry crust and the “toppings” were equally not enjoyable. The amount of chicken and cheese were almost non existent. Overall not a flight we would want to repeat!!

There was a problem in the luggage because there were not porters

2-1/2 hours on tarmac after arrival to DFW, lost connection to London, 3 hours wait for customer assistance, stayed on our own account in DFW, no replacement flight for 5 days, had to cancel the entire travel and return to Monterrey today.

My worst flying experience so far. This flight was delayed a total of 42 hours and diverted to New York before it was finally cancelled. It was delayed 4 and a half hours in London. As we were scanning our boarding passes at the gate they advised that the flight was being diverted to JFK since the delays caused us to missed the open hours for Charlotte international customs and immigration. We were assured multiple times by airport personnel, flight attendants, and the Pilot that we would land at JFK go through customs and immigration and then reboard the plane to fly to Charlotte in the same night. When we landed in New York the pilot advised us as we were retrieving our carry on luggage that we were delayed till 10am the next morning and to see guest services to get a room for the night. During this time I had to purchase a room for a family member in Charlotte which drove over 4 and a half hours to pick us up from Charlotte. This could have been avoided if American Airlines had been up front about the delay. Then after standing in line for over 2 and a half hours at guest services we were taken by taxi to a hotel 30 minutes out of the way. Luckily I looked for other flights that night and found one at 8 am to get on. The initial flight which we were scheduled to fly to charlotte in was delayed 12 more times and was finally cancelled 42 hours after it was supposed to land. I am unaware of what happened to the guest that were supposed to fly on the flight after we were placed on another flight but 42 hours in delays for a direct flight is absolutely ridiculous.

The boarding to Gatwick was a breeze but the boarding from Gatwick was a nightmare. The onboard service to Gatwick had a lot to be desired but the onboard sevice from Gatwick was amazing ! Very nice,friendly and funny ! Would I recommend BA to anyone.? ! Yes I would!

Is it American Airlines or British Airways? This is so confusing. I got it from Portugal.

Appreciate free wine and entertainment plus good meals. Also leg room

Book cheap flights from Porto to the United States

Recent round-trip flight deals

11/19Tue
1 stopTAP AIR PORTUGAL
11h 10mOPO-EWR
11/22Fri
nonstopTAP AIR PORTUGAL
6h 45mEWR-OPO
$406
10/15Tue
nonstopTAP AIR PORTUGAL
8h 00mOPO-EWR
10/22Tue
1 stopTAP AIR PORTUGAL
11h 00mEWR-OPO
$408
11/23Sat
1 stopIberia
22h 15mOPO-MIA
1/18Sat
2 stopsIberia
16h 01mMIA-OPO
$487
11/13Wed
2 stopsIberia
23h 25mOPO-MIA
11/19Tue
1 stopIberia
11h 00mMIA-OPO
$495
11/13Wed
2 stopsUnited Airlines
37h 13mOPO-MIA
11/19Tue
3 stopsUnited Airlines
26h 25mMIA-OPO
$509
9/7Sat
2 stopsAmerican Airlines
30h 33mOPO-MIA
9/14Sat
2 stopsAmerican Airlines
31h 53mMIA-OPO
$511
11/14Thu
1 stopUnited Airlines
15h 05mOPO-EWR
11/22Fri
1 stopUnited Airlines
16h 20mEWR-OPO
$518
9/21Sat
1 stopBritish Airways
12h 30mOPO-JFK
10/3Thu
2 stopsBritish Airways
24h 44mJFK-OPO
$518
11/10Sun
2 stopsAmerican Airlines
16h 25mOPO-EWR
11/17Sun
2 stopsAmerican Airlines
17h 15mEWR-OPO
$520
6/20Thu
2 stopsBritish Airways
28h 44mOPO-JFK
6/24Mon
2 stopsBritish Airways
21h 06mJFK-OPO
$687

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Recent one-way flight deals

10/21Mon
2 stops
16h 55mOPO-BOS
$291
6/13Thu
nonstopAzores Airlines
8h 00mOPO-JFK
$293
9/18Wed
1 stopTAP AIR PORTUGAL
10h 15mOPO-EWR
$370
9/22Sun
1 stopTAP AIR PORTUGAL
27h 45mOPO-MIA
$372
9/4Wed
1 stopIberia
28h 15mOPO-SFO
$446
11/8Fri
2 stopsIberia
14h 40mOPO-JFK
$450
10/30Wed
2 stopsAmerican Airlines
30h 35mOPO-EWR
$465
10/12Sat
2 stopsAmerican Airlines
16h 28mOPO-LGA
$470
6/12Wed
2 stopsUnited Airlines
19h 40mOPO-SFO
$818
7/11Thu
1 stopUnited Airlines
13h 26mOPO-FLL
$834

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Last minute flights from Porto to the United States

Last minute flight, train and bus deals

6/6Thu
multi-stopAir Europa
15h 10mOPO-JFK
6/8Sat
multi-stopAir Europa
16h 15mJFK-OPO
$530
6/7Fri
multi-stopAmerican Airlines
17h 05mOPO-MIA
6/23Sun
multi-stopAmerican Airlines
11h 05mMIA-OPO
$543
6/7Fri
multi-stopBritish Airways
27h 30mOPO-MIA
6/23Sun
multi-stopBritish Airways
13h 55mMIA-OPO
$623
6/7Fri
multi-stopBritish Airways
32h 30mOPO-MIA
6/23Sun
multi-stopBritish Airways
13h 55mMIA-OPO
$624
6/7Fri
multi-stopIberia
27h 46mOPO-MIA
6/23Sun
multi-stopIberia
18h 30mMIA-OPO
$640
6/7Fri
multi-stopUnited Airlines
12h 25mOPO-JFK
6/10Mon
multi-stopUnited Airlines
25h 40mJFK-OPO
$665
6/7Fri
multi-stopUnited Airlines
14h 40mOPO-EWR
6/10Mon
multi-stopUnited Airlines
15h 10mEWR-OPO
$665
6/8Sat
multi-stopIberia
22h 05mOPO-MIA
6/16Sun
multi-stopIberia
18h 30mMIA-OPO
$672
6/7Fri
multi-stopTAP AIR PORTUGAL
12h 45mOPO-MIA
6/12Wed
multi-stopTAP AIR PORTUGAL
12h 45mMIA-OPO
$770
6/5Wed
multi-stopTAP AIR PORTUGAL
17h 30mOPO-MIA
6/12Wed
multi-stopTAP AIR PORTUGAL
12h 45mMIA-OPO
$788

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