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Find cheap flights from Porto to the United States from $187

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 5/21. 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
Wed 6/5
Wed 6/12

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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
New York1 stop$404
Los Angeles
Los Angeles2 stops$656
Las Vegas
Las Vegas1 stop$577
Miami
Miami2 stops$424
San Francisco
San Francisco1 stop$627
Boston
Boston1 stop$463
Denver
Denver2 stops$968
Fort Lauderdale
Fort Lauderdale2 stops$423
Atlanta
Atlanta2 stops$722
Honolulu
Honolulu2 stops$994

Good to know

Low season

January

High season

August

Cheapest flight

$187
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Porto to Newark Liberty 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 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 $540 one-way - $641 round-trip
  • Morning departure is around 17% more expensive 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 11118 reviews
7.1Entertainment
8.1Crew
6.7Food
7.7Boarding
7.2Comfort
Airline reviews

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

2.0 MediocreTed, May 2024IAD - SFO
Read more about United Airlines reviews

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Only water and pretzels served on six hour flight. Did not see crew rest of flight. No video screens and so no wired audio. Poor sound on plan so did not understand anything said by crew. This is a safety issue. Electrical socket did not retain charging block so could not charge phone. No video screen so could not watch movies. Phone is not a substitute.

It was fine. Flight was on time and arrived at destination with 15 min to spare.

My bag was lost with my medicine and I am very inconvenienced. I don’t know what happened, however I want you to do a better job on getting people’s bag back

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The food that was offered based on class level of your ticket was absolutely ridiculous and disgusting. They didn't even hot tea to serve, the food was horrible. On our departure flight I was seated in premium plus economy and considering the cost of the flight the food was literally some of the worst I've ever eaten. On the return flight I sat in economy with extra leg room and was given a thin little throw "blanket" and a flimsy little pillow. The air condition was on artic and the seating arrangement wasn't really worth the money. The seat didn't recline good enough and the foot rest was laughable. Total waste.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the room where it was being kept.

The flight was delayed due to weather issue…WiFi did not work and even though I wanted to pay for WiFi I couldn’t buy it. Overall very disappointing even though I paid and reserved Business class

Great crew. We were delayed so that late passengers could get on the flight. Love the bedding in business class. Good food. Great experience.

The CX617 from HK to BKK was delayed more than 1.5 hours.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

All four American Airlines flights I took in last seven days were delayed. Caused me loads of problems, missed meetings, loss of time and money.

American cancelled our flight home. Zero option for hotel, alternative transportation and took 3 hours to find our bags so we could take a 3 hour UBER ride home on our dime. Never flying AA again.

They gave my seat away although it was a connecting flight with them and the flight was a bit delayed.

They ocer booked the connecting flight. My bags took a long time to come out, nevertheless I got to the gate in time to board, but they have given my seat to another passenger. They were aware I was connecting from another flight that was a little late, but they did not care. The customer representatives were rude. A horrible experience.

Flight was cancelled had to move to another gate late again no internet paid for the month and never can use it waste of money

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

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

Very agressive with bags both arrival and departures found minor damage to my luggage including my check bag being broken into nothing of value was in there so I do not believe anything was taken but definitely broken zipper into the outer pockets of suitcase

Everything was nearly perfect, and TAP staff were especially helpful when we missed our connecting flights and had to get on the next flight to Rome. The only aspect that could have been better was boarding: it was somewhat disorganized, which created a bit of stress. But in the end, everyone got on the plane, so the less-then-perfect boarding process did not take away from the overall excellent experience.

TAP Air makes you take a bus on arrival or departure, making it difficult for passengers to make connections.

Two of three flight attendants were not super kind as I would expect. The very kind young lady in my section was wonderful but then lady and man up front were not. Sorry but it makes a difference !

Great staff who were ready working with smile 6 in the morning on New Year’s Day. Although security checkpoint was way too busy, the airline staff were understanding and waited few minutes after boarding. We took off not only exactly on time, but arrived 20 minutes early. Two thumbs up!!!

Flight was an Iberia Flight on Level but seemed to be outsourced to a 3rd airline - Wamos. Seating pattern was different than when booked, we waited on the JETBRIDGE for 45 minutes to board, food was terrible. Movie options were limited to about 20 and very old, TV shows was limited to about 15 and equally as old. Staff was fine but definitely the "b-team". Landed about 60 minutes early and waited on the runway for 45 minutes - despite that Logan Airport in Boston recently added new gates. Mediocre experience at best.

Improve food options. Do not charge so much for checked bags. As some who paid 990 EUR fir the round trip international flight it is horrendous to pay another 140 for 1 checked bag.

My luggage never arrived in Miami; still waiting a day later.

good service from crew. Before the would have an option between cookies or nuts as snacks.. Now, there are only cookies. too bad. People who can not have sugar don't have a choice.

Service and food are good. However, main cabin with the extra cost one pays could be better. I don't see any difference with the rest of the seats in the regular category. The seats are too close to the ones in front. For short flights it is Ok, but for long ones there should be more space.

As with every airline the seats are not built for tall people.

Flight was delayed by well over an hour. Communication was terrible.

Fast check in, easy to navigate, crew were very good, the plane was delayed due to a previous flight and I found the cleanliness a little lacking but overall it was fine

I would not fly with BA again. Packed in like sardines, constant request to turn down air conditioning due to freezing cold for hours and the food was pretty to look at but tasteless!

My wife and I paid for seat selection to be together. My wife and I were on separate rows and the excuse they gave was they changed the plane. Also, I have celiac and asked for a gluten free meal in the ticket profile which they did not have.

my original flight was cancelled the previous day, and i was rescheduled onto this flight, which left much earlier in the morning, impacting my previous evening and requiring me to get up much earlier in the morning to get to the airport online. This practice happens way way way too much, and it seems on every airline, though AA is probably the worst.

Spending 10 hours on a flight with no video or wifi access due to issues per stewardess was not enjoyable nor acceptable. Will follow up directly with the airline as well

I really did not like being ordered to pull my shade down by the attendants. One of them was very rude to me about it, standing there until I closed it like I was a child brusquely reaching across me to close an adjoining one. They claim it was so people who wanted to could sleep. It’s a 10:30am flight not a red eye. Closing your shade or leaving it up for natural light should be a choice. Ruined my flight!

My baggage did not arrived with me. Took 3 days to get it after so may calls and follow up

The crew was very attentive and kept busy serving a variety of treats!

Terrible. Flight was 3 hours delayed and I missed my other flight to my final destination

Offered vegetable curry when it was actually tofu which I don’t care for.

The flight was good the crew excellent…but take off delayed three hours!!!

Both mine and my husband's chairs were broken. Also it took 2 hours to get our bags after our flight which was wild.

perhaps eye contact with the cabin crew, instead of abruptness and an impatience to serve.

Book cheap flights from Porto to the United States

Recent round-trip flight deals

6/4Tue
1 stopBritish Airways
26h 40mOPO-JFK
6/11Tue
1 stopBritish Airways
18h 10mJFK-OPO
$404
5/16Thu
1 stop
12h 50mOPO-JFK
5/30Thu
1 stop
18h 10mJFK-OPO
$420
5/24Fri
1 stopIberia
15h 40mOPO-JFK
6/4Tue
1 stopIberia
9h 50mJFK-OPO
$425
5/23Thu
1 stopIberia
11h 35mOPO-JFK
6/4Tue
1 stopIberia
9h 50mJFK-OPO
$427
9/23Mon
1 stopTAP AIR PORTUGAL
14h 50mOPO-MIA
10/14Mon
1 stopTAP AIR PORTUGAL
12h 25mMIA-OPO
$431
9/23Mon
1 stopTAP AIR PORTUGAL
14h 50mOPO-MIA
10/14Mon
1 stopTAP AIR PORTUGAL
27h 00mMIA-OPO
$432
6/4Tue
1 stopUnited Airlines
13h 40mOPO-MIA
6/11Tue
2 stopsUnited Airlines
33h 52mMIA-OPO
$469
6/4Tue
1 stopUnited Airlines
14h 54mOPO-FLL
6/11Tue
2 stopsUnited Airlines
20h 00mFLL-OPO
$471
6/13Thu
1 stopAmerican Airlines
17h 05mOPO-MIA
6/20Thu
2 stopsAmerican Airlines
24h 03mMIA-OPO
$504
9/23Mon
2 stopsAmerican Airlines
31h 49mOPO-FLL
10/14Mon
2 stopsAmerican Airlines
18h 48mFLL-OPO
$508

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Recent one-way flight deals

5/21Tue
2 stops
43h 13mOPO-EWR
$187
6/5Wed
1 stop
13h 40mOPO-EWR
$203
9/2Mon
1 stopTAP AIR PORTUGAL
26h 10mOPO-BOS
$363
6/18Tue
1 stopTAP AIR PORTUGAL
14h 35mOPO-MIA
$365
10/22Tue
1 stopIberia
17h 35mOPO-SFO
$380
5/16Thu
1 stopIberia
17h 45mOPO-SFO
$428
6/18Tue
2 stopsAmerican Airlines
31h 50mOPO-JFK
$459
8/27Tue
1 stopAmerican Airlines
29h 00mOPO-JFK
$465
5/18Sat
2 stopsUnited Airlines
22h 14mOPO-LGA
$681
5/23Thu
2 stopsUnited Airlines
14h 52mOPO-LGA
$791

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Last minute flights from Porto to the United States

Last minute flight, train and bus deals

5/7Tue
multi-stopIberia
11h 30mOPO-JFK
5/13Mon
multi-stopIberia
29h 50mJFK-OPO
$553
5/9Thu
multi-stopAmerican Airlines
11h 35mOPO-JFK
5/17Fri
multi-stopAmerican Airlines
31h 27mJFK-OPO
$565
5/6Mon
multi-stopKLM
13h 10mOPO-JFK
5/12Sun
multi-stopKLM
20h 00mJFK-OPO
$661
5/6Mon
multi-stopUnited Airlines
23h 45mOPO-EWR
5/12Sun
multi-stopUnited Airlines
15h 25mEWR-OPO
$666
5/6Mon
multi-stopKLM
14h 25mOPO-JFK
5/12Sun
multi-stopKLM
20h 00mJFK-OPO
$713
5/6Mon
nonstopTAP AIR PORTUGAL
8h 00mOPO-EWR
5/12Sun
nonstopTAP AIR PORTUGAL
6h 45mEWR-OPO
$728
5/6Mon
nonstopTAP AIR PORTUGAL
8h 00mOPO-EWR
5/12Sun
nonstopTAP AIR PORTUGAL
6h 45mEWR-OPO
$752
5/9Thu
multi-stopUnited Airlines
22h 44mOPO-EWR
5/17Fri
multi-stopUnited Airlines
20h 55mEWR-OPO
$890
5/9Thu
multi-stopDelta
18h 43mOPO-EWR
5/17Fri
multi-stopDelta
17h 30mEWR-OPO
$998
5/9Thu
multi-stopDelta
20h 13mOPO-LGA
5/17Fri
multi-stopDelta
15h 41mLGA-OPO
$1,260

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