$288 Find Cheap Flights from Portugal to the United States - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portugal to the United States departing on 9/29. 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.
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Cheap Flights from Portugal 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 Portugal 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 Portugal to the United States

Tue, Nov 3 - Mon, Nov 9
Icelandair Logo
2:00 pm - 6:25 pm
LIS
-
EWR
33h 25m
1 stop
Icelandair Logo
7:35 pm - 12:50 pm
EWR
-
LIS
12h 15m
1 stop
$421Icelandair
Thu, Nov 26 - Mon, Nov 30
Icelandair Logo
2:00 pm - 6:25 pm
LIS
-
EWR
33h 25m
1 stop
Icelandair Logo
7:35 pm - 12:50 pm
EWR
-
LIS
12h 15m
1 stop
$429Icelandair
Thu, Nov 19 - Thu, Dec 3
United Airlines Logo
12:35 pm - 4:00 pm
OPO
-
EWR
8h 25mnonstop
United Airlines Logo
9:45 pm - 9:30 am
EWR
-
OPO
6h 45mnonstop
$473United Airlines
Tue, Sep 1 - Sun, Sep 6
United Airlines Logo
10:25 am - 1:00 pm
LIS
-
EWR
7h 35mnonstop
United Airlines Logo
3:11 pm - 10:30 am
EWR
-
LIS
14h 19m
1 stop
$483United Airlines
Tue, Nov 3 - Tue, Nov 10
TAP AIR PORTUGAL Logo
5:40 pm - 9:05 pm
OPO
-
EWR
8h 25mnonstop
TAP AIR PORTUGAL Logo
11:05 pm - 10:45 am
EWR
-
OPO
6h 40mnonstop
$488TAP AIR PORTUGAL
Thu, Aug 27 - Wed, Sep 9
Delta Logo
5:00 am - 6:34 pm
LIS
-
FLL
18h 34m
2 stops
Delta Logo
7:59 pm - 5:50 pm
FLL
-
LIS
16h 51m
2 stops
$599Delta
Thu, Aug 27 - Wed, Sep 9
Delta Logo
5:00 am - 6:34 pm
LIS
-
FLL
18h 34m
2 stops
Delta Logo
7:59 pm - 5:50 pm
FLL
-
LIS
16h 51m
2 stops
$600Delta
Wed, Oct 7 - Thu, Oct 29
TAP AIR PORTUGAL Logo
10:20 am - 2:35 pm
LIS
-
MIA
9h 15mnonstop
TAP AIR PORTUGAL Logo
5:50 pm - 6:00 am
MIA
-
LIS
8h 10mnonstop
$622TAP AIR PORTUGAL
Thu, Aug 27 - Wed, Sep 9
British Airways Logo
11:05 am - 10:55 pm
LIS
-
PBI
16h 50m
1 stop
British Airways Logo
3:25 pm - 5:55 pm
PBI
-
LIS
21h 30m
2 stops
$642British Airways
Thu, Aug 27 - Wed, Sep 9
British Airways Logo
11:05 am - 10:55 pm
LIS
-
PBI
16h 50m
1 stop
British Airways Logo
3:25 pm - 5:55 pm
PBI
-
LIS
21h 30m
2 stops
$644British Airways
Booking Insights

KAYAK's insights & trends for flights to the United States

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

What is the cheapest flight to the United States?

These are the best round-trip prices found by users searching on KAYAK in the last 5 days.

The cheapest ticket to the United States from Portugal found in the last 5 days was to Newark Airport, at $298 round-trip. The most popular route is Faro (FAO) to Newark Airport (EWR) and the cheapest round-trip airline ticket found on this route in the last 5 days was $298.

How much is a flight to the United States?

The average and cheapest price for all round-trip flights to the United States from each origin found by users searching on KAYAK in the last month.

A flight to the United States costs $886 on average. The cheapest price found on KAYAK in the last 2 weeks was $298 for the route Lisbon (LIS) to Boston (BOS). The most popular routes on KAYAK are Lisbon to Boston which costs $984 on average, and Porto to New York, which costs $690 on average.

See prices from:

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Portugal 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 Portugal to the United States is November, when tickets cost $593 (return) on average. On the other hand, the most expensive months are August and July, when the average cost of round-trip tickets is $782 and $773 respectively.

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

The average price for all round-trip flights from Portugal to the United States depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to the United States is generally in the evening, when round-trip flights cost $726 on average. Morning departures are around 11% 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 $809.

How far in advance should I book a flight from Portugal 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 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 Portugal to the United States, you should book around 4 weeks before departure, which saves you about 21% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Which is the cheapest airport to fly into in the United States?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in the United States is Chicago O'Hare Intl Airport (ORD), with an average flight price of $695.

Good to know

Low seasonFebruary
Cheapest flight$288
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from Porto to Newark Liberty Airport

Flights from Portugal to the United States: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Portugal to the United States 
MichelleFlew with TAP AIR PORTUGAL
LIS
-
ORD
Jun 2026
Very strict on weights for hand luggage and sizes. Would fly again and just plan to check a bag
HFlew with Azores Airlines
PDL
-
BOS
Dec 2024
Expect to walk up the stairs on the plane as the ponta drlgado has no air bridge
AmirFlew with TAP AIR PORTUGAL
LIS
-
SFO
Jul 2024
For any flight that's part of a Multi-City flight plan, don't miss it. Otherwise, all your remaining flights on that plan will be terminated.
Sheena
LIS
-
BOS
Jun 2024
Be easy for the longer lines for passports and going through customs. Give your self plenty of time.
DavidFlew with TAP AIR PORTUGAL
LIS
-
MIA
Mar 2024
There are other airports like Seville, Barajas, Orly, Charles de Gaulle, etc. that connect the planes directly to the terminal. No need for the extra tour bus.

FAQs for booking flights from Portugal to the United States

  • How does KAYAK find such low prices on flights from Portugal 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 Portugal to the United States.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Portugal 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 Portugal 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 Portugal 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 Portugal 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 Portugal 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 day to fly to the United States?

    Based on KAYAK data, the cheapest day to fly to the United States is Wednesday where round-trip tickets can be as cheap as $788. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $947 on average.

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

 
Need help choosing which airline to fly with from Portugal 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
DeltaOverall score based on 8463 reviews
8.1Boarding
7.2Food
7.8Comfort
8.5Crew
7.8Entertainment
Airline reviews

We never made it on this flight because we missed our connection due to o delayed flight from Jackson.

2.0 MediocreAnonymous, Jul 2026
SLC - SJC
Read more Delta reviews

We never made it on this flight because we missed our connection due to o delayed flight from Jackson.

We had a terrible experience. The flight was delayed several hours, so we missed our connection. We were told to wait at the airport. At around 11:00 pm, the flight was cancelled. There were no available seats out of Jackson for the next two days. Fortunately, we had the foresight to rebook on United for the next day. However, we had to spend a long day at the airport and an overnight at a mediocre hotel. It was a miserable way to spend part of our vacation. We also sacrificed our $450 deposit on our California hotel because we could not get there.

delta wifi wouldn’t work boarding was not in sequence flight crew spent most of their time on the phone with the lights off pretending no one wanted or needed anything

Friendly flight attendant Quick checking for baggage drop Quick TSA lines

Crew was absolutely fantastic and we’re so welcoming and friendly ❤️

Terrible. I was bumped off of my original flight and spent the next six days fighting to get back on it. I lost hours of my vacation trying to get this situation corrected.

Boarding was tough as we had to take a bus out to the plane and walk up a lot of stairs. Difficult with heavy carry-ons that said I got an entire empty row of seats, which was excellent for an international flight. Food was very mediocre but happy with the comfort so not complaining.

Delta is a cut above the others in customer service.

Tasty snacks. On-time departure and early arrival. Luggage arrived quickly at the carrousel. The only negative was a man behind us that was heavily inebriated. He was served 3 double drinks during the flight. There was no telling how much he had before the flight. He was so out of it that he spilled a drink and broke the heavy liquor glass on the floor. I don't believe he should have been served so much alcohol on a two-hour flight.

Checkin was easy, boarding was organized, employees friendly and nice. Was a lovely flight.

Middle seats SUCK!!!! I paid more money than I should have because of your terrible site Kayak.com. I'll try to use your competitors going forward. I am so disappointed you would play off business class.com as business class seats

They lost my bag and I still haven’t received it yet

The plane was old Only 3 bathrooms available for economy The entertainment was old and the selection was poor

Boarding was a disaster being moved by Air France by bus to the plane. The plane should have been at the right gate.

Flight was late over a hour just like the first one. WiFi was down.

The check in was horrible. I stood in line for 1 hour to check in with an Air France ticket. Then I was told I had to go to Delta counter onstead to check in instead. It made no sense.

Medíocre. The food wasn't good (although not bad, bad) and the staff wasn't kind. I asked for n extra blanket, the steward never came back, serving us roughly.

They wanted to close counter although they did not provide the wheelchair requested which ended by going alone to transit security and lost long time and they did not want to wait .

They charge me for luggage which is was included on the ticket

Lost luggage, 2 bags were badly damaged and one of the bags came open.

It was a short, comfortable flight. It did leave an hour late due to the pilot having to be replaced (family emergency) but that didn’t inconvenience myself & my friend. The situation was explained, eventually.

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

I paid $7,000 to fly round trip to Porto. I thought it was for business class. But on the leg from Miami to Newark, and again from Newark to Miami, i was in coach. One time in the middle seat of coach. From Newark to Porto I was in business class as expected, and it was fine. I fly to Portugal once per month, often paying $5,000 for business class. Usually i fly American Airlines. I'd be happy to fly more with United Airlines. But my experience was disappointing because i was put in the coach for almost half the flights.

I would have liked an opportunity to move to a different seat ( even would have checked in my hand luggage)as I had health issues where I didn't have to clamber over the passenger next to me to for toilet use/ movement [ She was a highly unpleasant neighbor to sit next to]. In addition, I found that my European phone plan had run out of data and so I was not receiving emails from yourselves on airport wifi to be able to check in online and verifications difficult as did not accept the ticket number I had. I asked for an extra blanket but was told there was none. Then I saw other passengers receiving them. I couldn't eat the food and asked for snacks : Stewardess said " on the way" but they did not bring. The best bit was the check in process in Lisbon. Very efficient. However, I did not understand why we had to collect our bags at Washington then go through customs again. It was not explained. I also with my leg and health issue had approximately mile walk to the gate ( which then changed) . There appeared to be no moving walkways or help provided.

United left one of our bags back in SFO but that’s not my real complaint. The complaint is how it all went down. So we checked in the day before online and were told we could use the quick drop for luggage. So the next day I used baggage quick drop curbside at SFO. The agent mistakenly didn't tag my bag as he put my bag on the conveyor belt untagged. We immediately alerted him he had not tagged the bag. I walked with him to the baggage service office to find my bag and tag it. We waited outside the office for 10 mins. He came out and said everything was ok and the bag was going to be tagged and on my flight. We received a text that one of our bags was on the flight but the other was not. I alerted my first class flight attendant immediately upon boarding the flight. She was helpful and said she’d get it sorted out right away. She called over the gate agent. The gate agent used my bag number and looked over information on her device. She said my bag was on the flight. The flight attendant was standing with her, looking at the device, and also said “yep it’s on the flight”. During the flight the flight attendant made reference to how reassuring it must feel knowing the bag was on the flight. Upon arriving to IAD we received a text that my bag was not on my flight. The text said my bag would arrive to my final destination LIS 24 hrs late. I understand that mistakes happen. I was totally ok with my bag mistakenly not getting tagged at the quick drop. I was fine with walking down to baggage services to tag my bag. But, what I am not ok with is that the United staff said they fixed the mistake two different times, assuring me twice that my bag would be/was on the plane…and it wasn’t. I expected better attention by the employees, for them to do what they said they were going to do. We also spent extra money to upgrade our seats to first class, including the entire return leg from Lisbon to San Francisco because we wanted a smoother and more relaxing travel experience. Our money was not well spent. We will not be using United for travel going forward.

Checked my bag despite paid the seat upgrade and there was plenty of space available in the overhead bin.

The flight crew was fantastic. The flight attendants were incredibly considerate, kind and attentive.

One of the best flying experiences I’ve ever had.

The flight from Lisbon to Newark was much, mush better then flight from Newark to Porto.

Web site needs improvement Plane was clean and modern Lay Flat beds were hard and not to comfortable (business class )

Overall, everything was fine—the service, the food, and the entertainment—but the boarding process in Lisbon was a total mess. I’m not sure I’d fly with TAP again. It’s absurd to have to pay for good seats at the front of the plane only to board last; the overhead bins above your seat are likely already full thanks to passengers who boarded earlier—even though they might be seated at the back of the plane. I will think very carefully before flying with TAP Portugal again; it seems to me that they need to review their boarding process. I understand the logic of filling the plane from back to front, but the seats at the front are more expensive. Horacio Rodriguez

Boarding was delayed by one hour because cleaning and catering crews did not board the plane in time. Take off was delayed for another 40 minutes because of "rush hour scheduling". Vague descriptiion. My in-flight entertainment system was stuck initializing. The flight attendant indicated that they could not reset it without resetting everyone's system. Overall, a miserable experience.

Better leg room than expected in economy. Nice crew. Adequate bathrooms. Seat cushions a little thin, but recline well and have adjustable headrests. Best value. Liked having nonstop from ORD to Lisbon.

Excellent! Flight left a bit late but overall a pleasant experience.

On both flights, TAP Air Portugal messed up the seating choices that I paid for. They acknowledged that I had purchased seating, that they were errant in ensuring my choices, but told me nothing could be done about it. When I asked to be refunded, I was directed to "talk to someone from Air Portugal" Mon-Friday, and then I was dismissed. No help, no phone number provided to me. I was very annoyed both times and feel cheated.

Business class seats aren't comfortable. Food was not good.

Didn't make announcements during boarding, flight attendant seemed annoyed when I asked for water. Too many hours between flights. Confusing check in at the Lisbon airport.

Delayed at the beginning and the end and almost missed our connection

The crew was great. There was a big guy sitting next to me who was hanging over my side of the armrest the entire time. Maybe some information about "Be considerate of your neighbors, this is tight space, be kind". The breakfast sandwich was not appealing at all.

I was sent an email that said my card payment was not verified. When I spoke to an agent , he said my card was not verified and the flight I thought I had to booked was no longer available so I booked another flight on another airline(United). Later I got flight updates , etc., concerning my supposed first flight. So if I was charged for this flight on British Airways/American airlines, I need a refund.

The crew made it a great flight. They were friendly and attentive. They made me want to fly British Airways again.

BA has not been handling priority luggage with any special priority. This time our luggage was distinctly very slow to arrive, well after the first half of items to arrive. Business class flights cost a lot and it would be nice to have that reflected in the speed of baggage handling! (I note that this has worsened in our long experience of BA.) On a different note, we spent 2.5 hours on the plane after landing because of an airport mishap at Boston Logan. The pilot provided reasonably frequent update but more could have been done to ensure passenger comfort, such as more beverage and maybe snack services.

Food is horrible. Flight was good and the staff were mostly men.

Delayed suitcase - terrible service to get my suitcase next day, I was informed it would arrive today in the afternoon (Jun/28). Now, I was informed I may or may not receive it until 3 am (Jun/29).

Seats were comfortable, but boarding was the worst I've ever seen. Way too much walking to get onboard as we had to go up & down steps several & then bus took us halfway around the airport for boarding & had to board outside after a very long bus rood.

The flight crew was kind, flexible, and accommodating. The seats on the plane were extremely uncomfortable.

Besides having a LONG layover in Philadelphia to begin with, our flight was delayed and left late. We spent 7 hours in the Philadelphia airport after being in the air 7 hours from Portugal to Philly. It turned into a 24 hour day of travel which was exhausting. I know you can't help weather but our layover was difficult as my husband is handicapped. The staff was EXTREMELY helpful with his wheelchair tho!!

The decided to just remove our booking without telling us. It ended up costing us thousands

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

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

Cabin class types available on flights to the United States

Cabin classes available on flights to the United States. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.