$292 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 1/19. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to the United States

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Porto to the United States

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
New York
Newark1 stop$442
Los Angeles
Los Angeles1 stop$561
Las Vegas
Las Vegas1 stop$704
Miami
Miami1 stop$440
San Francisco
San Francisco1 stop$596
Boston
Bostonnonstop$460
Denver
Denver1 stop$837
Seattle
Seattle3 stops$772
Fort Lauderdale
Fort Lauderdale2 stops$529
Atlanta
Atlanta1 stop$780
Honolulu
Honolulu2 stops$1,013
Philadelphia
Philadelphia1 stop$761
New York
Newark1 stop$442
Los Angeles
Los Angeles1 stop$561
Las Vegas
Las Vegas1 stop$704
Miami
Miami1 stop$440
San Francisco
San Francisco1 stop$596
Boston
Bostonnonstop$460
Denver
Denver1 stop$837
Seattle
Seattle3 stops$772
Fort Lauderdale
Fort Lauderdale2 stops$529
Atlanta
Atlanta1 stop$780
Honolulu
Honolulu2 stops$1,013
Philadelphia
Philadelphia1 stop$761

Book Cheap Porto to the United States Plane Tickets

 
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, Dec 5 - Tue, Dec 9
Air Europa Logo
7:35 am - 7:30 pmOPO-MIA
16h 55m1 stop
Air Europa Logo
9:45 pm - 3:15 pmMIA-OPO
12h 30m1 stop
$440Air Europa
Find Deal
Fri, Mar 6 - Sun, Mar 8
Scandinavian Airlines Logo
5:35 pm - 3:40 pmOPO-EWR
27h 05m1 stop
Scandinavian Airlines Logo
6:30 pm - 4:45 pmEWR-OPO
18h 15m1 stop
$442Scandinavian Airlines
Find Deal
Fri, Dec 5 - Wed, Dec 10
Air Europa Logo
7:35 am - 7:30 pmOPO-MIA
16h 55m1 stop
Air Europa Logo
9:45 pm - 7:20 pmMIA-OPO
16h 35m1 stop
$442Air Europa
Find Deal
Mon, Dec 15 - Mon, Mar 16
Scandinavian Airlines Logo
5:35 pm - 1:25 pmOPO-EWR
48h 50m2 stops
Scandinavian Airlines Logo
7:30 pm - 9:35 amEWR-OPO
34h 05m2 stops
$451Scandinavian Airlines
Find Deal
Mon, May 11 - Sun, May 17
TAP AIR PORTUGAL Logo
6:05 pm - 8:45 pmOPO-BOS
7h 40mnonstop
TAP AIR PORTUGAL Logo
11:15 pm - 10:55 amBOS-OPO
6h 40mnonstop
$460TAP AIR PORTUGAL
Find Deal
Sun, May 10 - Sat, May 16
TAP AIR PORTUGAL Logo
6:00 pm - 8:40 pmOPO-BOS
7h 40mnonstop
TAP AIR PORTUGAL Logo
11:15 pm - 10:55 amBOS-OPO
6h 40mnonstop
$464TAP AIR PORTUGAL
Find Deal
Mon, Feb 2 - Mon, Mar 2
Iberia Logo
8:20 am - 7:15 pmOPO-JFK
15h 55m1 stop
Iberia Logo
11:45 pm - 9:15 pmJFK-OPO
16h 30m1 stop
$516Iberia
Find Deal
Thu, Dec 4 - Mon, Jan 12
United Airlines Logo
6:00 am - 6:44 pmOPO-LGA
17h 44m2 stops
United Airlines Logo
3:20 pm - 11:40 amLGA-OPO
15h 20m2 stops
$526United Airlines
Find Deal
Mon, Feb 9 - Wed, Feb 18
United Airlines Logo
6:00 am - 11:43 pmOPO-LGA
22h 43m2 stops
United Airlines Logo
1:15 pm - 11:40 amLGA-OPO
17h 25m2 stops
$529United Airlines
Find Deal
Mon, Jan 12 - Tue, Jan 20
KLM Logo
11:25 am - 11:25 amOPO-SEA
32h 00m1 stop
KLM Logo
3:10 pm - 10:30 amSEA-OPO
35h 20m1 stop
$848KLM
Find Deal
Booking Insights

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?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to the United States from Porto found in the last 72 hours was to New York, at $496 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 $496.

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 $774, 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 $513 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of round-trip tickets is $759 and $680 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$292
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Porto to Miami

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 $711.

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 $716 one-way - $626 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.
7.7
KLMOverall score based on 1411 reviews
7.7Comfort
7.8Boarding
7.3Food
8.4Crew
7.1Entertainment
Airline reviews

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

2.0 MediocreElizabeth, Oct 2025CDG - AMS
Read more KLM reviews

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

Ad experience - been flying many years with them but they are losing out to other carriers with their service and bagage / seating policy. My 2 12-yo kids were not placed with the parent. Absurdity.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

Klm start boarding while somw air issue in the plan

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

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

United has come a long way, it’s been a fantastic experience traveling with them.

Even though we were delayed, we were able to make our connection

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

Great crew, excellent landing, good food. Over all great experience. Thank you!

Older aircraft, no meal, only food was for purchase. Not impressed United.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Always wish for more healthy, gluten free options. We have to bring our own.

Having a long layover, I was very appreciative of the ability to stand by for an earlier flight. Other airlines like Delta have refused this to me in the past, just to be mean (because my ticket class wasn't high enough). United went out of their way to help me get to my destination early, which I really appreciated given that it was the third leg of a 24+ hour journey for me.

This flight leg was fantastic - super comfortable and a great selection of things to watch on the TV. Staff were excellent, really above and beyond.

Boarding process was fast and efficient. Short flight but on time and well organized. I would certainly fly TAP again.

Very long line at the gate, moved slowly. I had expected that boarding a flagship A330neo would be with a jetway directly at the gate, and not a long bus ride to the airplane.

The layover was only one hour and a huge line for passport control. If I didn’t cut the line and argue was every single official, I would’ve spent the night in this one. Obviously.TAP AIR people. do not take into account.this problem with their flight scheduling, which is extremely frustrating. Poor food choices, on the pasta was offered, they ran out of chicken right away. All the sodas and water poured in a tiny 70 mL cups, which is not enough to keep hydrated on the long flight. I had to ask for 34 cups at a time. Flight attendant seemed to be tired and overworked.

Very borderline, low budget airline without low budget prices There are no counts of soda, everything is dispensed enlarged bottles and poured into tiny cups about 70 mL so in order to keep hydrated you have to take 3-4 cups at a time. Also, there was only one food item offered, pasta, they ran out of chicken right away. Snack was very poor. It was called tuna sandwich, which is truly borderline. The flight attend attendance seemed to be overworked and tired.

I am not very tall, and had a difficult time getting my carry-on placed in the overhead bin while passengers were behind me waiting to get to their seats. After struggling with the luggage, I turned it around, and left it, knowing it was not properly placed, but believing there was adequate room for it in the bin. When the flight attendant came through the cabin, she asked whose bag it was, and scolded me for not positioning it correctly. She turned it around and moved on. I thought that her approach was totally unprofessional, calling out a passenger in that manner.

TAP‘s flight attendants seem to be among the least ambitious of all the international flight crews we’ve flown with. . When we left US and went to Portugal, and when we returned from Portugal, flight attendants were not very visible. Then did not offer frequent water breaks and when we had to go back to request water, I was almost an imposition. Meal quality was just average. The dinners were fine. Breakfast wraps were presented soggy.

There was no warning that they have added passport control after check in, the line was enormous and after 46 mins wait we missed our flight. Were forced to leave the airport and purchase new tickets at full price to board a later flight. TAP were unsympathetic and unhelpful.

Boarding we were jammed into a hot crowded bus waiting too long while another bus went in front of us. Appreciated blanket and pillow, movie available helped time pass, the food was not appealing so I had my own snacks, the flight is long, but nothing they can do about that. Staff adequate, flight good.

Did not enjoy the meal provided. The aircraft was dirty. For instance, the screen seemed to have been cleaned with a dirty rag. Disgusting.

The person at the checkin was very helpful. We couldn’t check in through the keyosk, but the agent was very helpful.

Great staff, just very far from the main terminal, had to run to connect my flight. I had 90 minutes to spare. But my flight from Chicago was delayed also.

My luggage is lost and nowhere to be found, no response from airline

Boarding was a shitshow. Had to bus to the gate. No separate bus and boarding process for Business Class.

The plane was very old, no power outlets. We also had to wait a long time to board. They kept moving us to different lines before we actually could step foot on the plane. We ended up being delayed an hour but we were never told or informed for any reason. After the meal I asked for a coffee which the flight attendant forgot and I had to ask again. Overall not the worst but not the best experience.

Need to pay for headsets, water, or any extra except air to breath.

Sitting space was very tight and I am not big or fat (I am 5'10" 178 Lb), so eating was very challenging. The rest was good.

Sitting space was very tight, so eating was difficult. But everything else was good.

12 hours flight. Only one meal, not enough food. At the galley only water during the flight. Lavatories not clean. Headsets at extra cost.

Need to pay for a cup of water. No food. Need to pay for headsets.

Everything should improve! Service like a low cost but prices like a premium airline. Crew in general with bad manners arguing for everything. You pay for priority access but then they use buses, so your loose your advantage to put your carry on first. That was the purpose for paying for priority. Bording is a nightmare, people accessing the plane for bothering doors, front and rear, no matter which line do you have.

Was all good.l including a sofdrink. AA improved significantly. There was no entertainment.

why can't planes be boarded from back to front?? everything was great otherwise

We flew into Barcelona and the plane was so cramped and very uncomfortable and dirty. But we flew out of Madrid and that plane was much better. Would fly Iberia again.

For what we are willing to pay for international air travel, our experience was very good. We had no problem checking in, we had very little wait time at the AA counter in Madrid, and the staff in Madrid were very helpful. The flight crew was helpful and courteous, the plane was on the newer side, and our assigned seats were together without us needing to purchase them. The flight took off on time and arrived early. Overall, it was a pleasant experience or as much as could be expected in economy for almost 10 hours.

Boarding was easy, the flight left on time and even landed 20 minutes early. The food was plentiful and really good! The crew was kind & helpful. Overall it was an exceptional experience!

We were delayed 2 hours because the crew was late. They need better planning by the crew, we had to sit in uncomfortable seats waiting for them.

The flight was safe, confortable and convenient. Thank you. I hope to come back soon!

Difficulty to check in online, but well handled at the airport. Flight delay was unfortunate. Crew was adequate but not what we have usually experienced from BA. Seat was not comfortable.

Food was terrible. Going to Italy I gave benefit of the doubt however returning to the USA was no better. Rolls were frozen. Butter was frozen. Quality of entree poor

temperature was too cold there should be free blankets, seat are very uncomfortable, entertainment is limited.

Everything you need to know for your flight from Porto to the United States

Information on your arrival and departure airports