ORD - OPO

$235 Find Cheap Flights from Chicago to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Porto departing on 10/23. 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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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Porto.
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Cheap Flights from Chicago to Porto (ORD-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago to Porto 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 Chicago to Porto

Tue, Nov 11 - Tue, Nov 18
United Airlines Logo
4:20 pm - 9:30 amORD-OPO
11h 10m1 stop
United Airlines Logo
6:00 am - 1:10 pmOPO-ORD
13h 10m1 stop
$484United Airlines
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Wed, Jan 14 - Sat, Jan 24
TAP AIR PORTUGAL Logo
7:10 pm - 1:05 pmORD-OPO
11h 55m1 stop
TAP AIR PORTUGAL Logo
4:55 pm - 3:00 pmOPO-ORD
28h 05m1 stop
$485TAP AIR PORTUGAL
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Wed, Nov 5 - Wed, Nov 12
United Airlines Logo
1:00 pm - 9:30 amORD-OPO
14h 30m2 stops
United Airlines Logo
12:30 pm - 8:05 pmOPO-ORD
13h 35m1 stop
$488United Airlines
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Wed, Oct 29 - Sun, Nov 9
TAP AIR PORTUGAL Logo
8:10 pm - 5:00 pmORD-OPO
15h 50m1 stop
TAP AIR PORTUGAL Logo
8:55 am - 3:00 pmOPO-ORD
12h 05m1 stop
$493TAP AIR PORTUGAL
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Wed, Nov 12 - Tue, Nov 25
Air Canada Logo
12:50 pm - 1:10 pmORD-OPO
18h 20m2 stops
Air Canada Logo
6:00 am - 10:05 pmOPO-ORD
22h 05m2 stops
$508Air Canada
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Mon, Sep 22 - Wed, Dec 10
Air Canada Logo
2:00 pm - 9:35 amORD-OPO
13h 35m2 stops
Air Canada Logo
6:00 am - 9:13 amOPO-ORD
33h 13m2 stops
$537Air Canada
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Sun, Sep 21 - Thu, Dec 11
Lufthansa Logo
9:40 pm - 11:20 pmORD-OPO
19h 40m1 stop
Lufthansa Logo
6:00 am - 8:05 pmOPO-ORD
20h 05m1 stop
$546Lufthansa
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Tue, Nov 25 - Sun, Nov 30
SWISS Logo
6:50 pm - 11:15 amORD-OPO
34h 25m1 stop
SWISS Logo
6:35 pm - 4:20 pmOPO-ORD
51h 45m2 stops
$547SWISS
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Mon, Oct 13 - Tue, Oct 21
SWISS Logo
7:05 pm - 11:30 amORD-OPO
34h 25m1 stop
SWISS Logo
8:40 am - 3:55 pmOPO-ORD
13h 15m1 stop
$552SWISS
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Wed, Oct 22 - Fri, Oct 31
Lufthansa Logo
3:35 pm - 10:20 amORD-OPO
12h 45m1 stop
Lufthansa Logo
6:15 am - 9:05 pmOPO-ORD
19h 50m2 stops
$582Lufthansa
Find Deal
Booking Insights

KAYAK's insights & trends for Chicago to Porto flights

Get data-powered insights and trends into flights from Chicago to Porto to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Chicago to Porto?

The average price of all round-trip flights from Chicago O'Hare Intl Airport to Porto clicked on KAYAK for each day over the last 12 months.

When flying from Chicago to Porto, you should consider leaving on a Friday and avoid Thursdays if you are looking for the best rates. For your return to Chicago, you’ll find the best rates on Saturdays and the most expensive ones on Fridays.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport to Porto, 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 Chicago O'Hare Intl Airport to Porto is February, where tickets cost $492 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $906 and $797 respectively.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Porto?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago O'Hare Intl Airport to Porto, 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 Chicago O'Hare Intl Airport to Porto, you should book around 4 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$235
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Chicago to Porto

When to book flights from Chicago to Porto

Are your dates flexible? Find out the best times to travel from Chicago to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Chicago to Porto flights

  • What are the luggage services available at Porto Airport?

    The airport offers free-of-charge luggage trolleys within the airport. Go to the landside to get your baggage wrapped to protect it from damages. Do you require a storage area for your bags as you tour the airport? Porto Airport has a storage room and lockers on the landside, 3rd floor of Departure level, available for you to store your bags. To acquire a storage room, you have to pay a fee of around €2 (2$2.04) to €7 ($7.16), depending on your luggage weight. The locker rooms are on the ground floor of the landside and go for roughly a minimum of €2 ($2.04).

  • Does Porto Airport have baby care facilities?

    Porto Airport has baby care rooms that are fully equipped on the landside and airside. If your child is about 15kg or less, the airport provides free-of-charge baby strollers that you can use within the airport premise. The pick-up station for the baby strollers is on the 2nd floor of the airside. The strollers are only allowed in the post-security areas.

  • How can I get to Porto city centre from Porto Airport?

    Regardless of the part of Porto that you would like to visit from the airport, there is always a bus in the bus system that fits your destination needs. If you want a car rental instead, there is a level Zero at the terminal where the service is accessible. You can opt for taxi services at the Arrivals area to access the town from the airport.

  • Does Chicago O’Hare International Airport offer accessibility services?

    ORD provides wheelchairs at the airport to passengers with mobility impairment. The airport also has TSA cares program that helps passengers with special needs in the process of security screening. You can also access all the airport restrooms as they are all wheelchair accessible. I designed the service animal relief area to be accessed by the pet and the owner. Chicago Airport has equipped all terminal elevators with Braille and raised numerals to allow all passengers access and use.

  • What is the cheapest flight from Chicago O'Hare Intl Airport to Porto?

    In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Porto was $235 for a one-way ticket and $484 for a round-trip.

  • Do I need a passport to fly between Chicago and Porto?

    Yes

  • Which aircraft models fly most regularly from Chicago to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Chicago to Porto?

    Star Alliance, and oneworld are the airline alliances operating flights between Chicago and Porto, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Porto from Chicago?

    Lisbon is the most popular layover city among KAYAK users traveling from Chicago to Porto.

  • Which is the best airline for flights from Chicago to Porto, SWISS or United Airlines?

    The two airlines most popular with KAYAK users for flights from Chicago to Porto are SWISS and United Airlines. With an average price for the route of $726 and an overall rating of 7.5, SWISS is the most popular choice. United Airlines is also a great choice for the route, with an average price of $734 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Chicago to Porto?

    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 Chicago to Porto.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Chicago 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 Chicago to Porto?

    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 Porto with an airline and back to Chicago with another airline. Booking your flights between Chicago and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to Porto?

    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 Porto from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Chicago O'Hare Intl Airport to Porto

  • Chicago O’Hare International Airport (ORD) has four accessible terminals 2, 3, 4, and 5 and 9 concourses B, C, E, F, G, H, K, L, and M. The four terminals are interconnected by automated trains that allow you easy access to all the terminals. Terminal 5 is located across the taxi strip, while the first three terminals are in the same building.
  • If you have kids and want them to wear off some of their energy before the flight departure time, you can have them visit the ORD family lounge, equipped with different video games, toys, and climbing structures. The family play area is in the Main Hall of terminal 2.
  • It takes about 4030lbs of carbon emitted per person to fly from Chicago O’Hare Airport to Francisco Sá Carneiro Airport (OPO). Tap Air Portugal is one of the least carbon-emitting flights flying the ORD-OPO route, with 28% less CO₂ hence suitable.
  • Whether you are having your layover in Newmark or Lisbon Humberto Delgado, you still will be traveling for long hours. Having some form of entertainment would come in handy. You can travel with airlines like Spirit Airlines, which offers Wi-Fi to make the journey tolerable.
  • One of the most vital needs as soon as you land in Porto from Chicago is liquid money. Find the Santander bank, located on the 3rd floor of landside, offering automatic banking services. You will need currency exchange services as well. Get to the ground and 3rd floor of the landside area to access Nova Câmbios for currency change.

Reviews of the top 5 airlines serving from Chicago to Porto

 
See real verified KAYAK customer reviews for airlines flying from Chicago to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Chicago to Porto? 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 1381 reviews
7.3Food
7.1Entertainment
7.7Comfort
8.4Crew
7.8Boarding
Airline reviews

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

2.0 Mediocrejoseph, Jun 2025JFK - AMS
Read more KLM reviews

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Klm start boarding while somw air issue in the plan

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

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.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

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.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

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

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

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

The boarding of took of late.The presentation of the food was horrable as was the tast of the food was cold and tastless.

Delay and keep changing gates. I have to run around from B to C then to E.

I was charged for my daughters bag when I am supposed to receive two free checked bags with my United Explorer card.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

Flight was great. Efficient boarding. Short flight. Early arrival. Friendly flight crew. The entertainment system did not work well. Could not access it until the aircraft reached 10K feet or more. Lots of glitches.

A bit rush for transit. Food and entertainment are not available

A good, comfortable flight with friendly crew and good entertainment options.

Very rude person at the boarding desk; flight attendant coughing 3 inches from my face three times- not even covering her mouth; boarding process very unacceptable for older people with stairs to all planes (are you all stuck in the 1960’s?). I am sure that I am not remembering all of the negative things, but I am sure you get the message!

There was chaos at the Naples airport. We arrived three hours early for the flight but there was no invitation available about where to go to check bags until an hour later. Then we had to go to a different terminal to check our bags and check in and back to the first to board.

We flew TAP last October from Newark to Lisbon. The meal was bad. This flight had good food. Also, this flight was delayed. There were TAP employees waiting at Lisbon to make sure we made our connecting flight. I find the TAP website and app frustrating, but the service once we reached the airport was very good

The airport temperature at the airport and on the flight was too warm

Boarding too way too long. Biggest peeve: zero in-seat power in economy! No plug sockets, no USB ports. Plane was an A330, so not old.

boarding is so disorganized, i was literally appalled at the boarding experience

Comfortable but not Polaris or Delta comfort Business Class. Overall 7 out of 10

Tap air Portugal was the best I will traveling again with u guys. Thank u.

The long wait at JFK made the trip horrible. Also not having enough buses when we deplaned was annoying

Check in needed to be in person, not nice. Also I won’t do connections in Charlotte again because you need to go through security again and short connections become a problem

Iberia lost my bag, said they found it in another country, said they sent it to me, but never did. Went my whole trip without my stuff, but expecting it to show up because that’s what they said would happen. Their communication sucks, their website sucks, and to top it all off, their seats are small and uncomfortable. They’re bad at their jobs and they should feel bad about themselves. Do not even get me started on the flight home. AVOID!

I described my experience in the previous window. I didn't realize that there would be another opportunity for this flight. Please look at my response in the previous window.

Boarding was 2 1/2 late no explanation Captain said he did not know why, but he rested at home for an extra couple of hours. Food was edible, Nothing more.

I liked the comfort of the plane. It was unexpected from past experiences.

BEWARE!!! Iberia changes your seats at random. I paid for a window seat and they changed it to one in the middle aisle resting against the bathroom- can’t lean back + hear every flush. This on a 11 hour flight.. There were families that were broken up with separate seats all over the plane. Lots of upset passengers showing their seat confirmation to the besieged and helpless airline steward. Also, the gluten free meal was tasteless.

Chair is very high. Your feet cannot touch the ground for 8 hours flight. It was a nightmare. Food was bad.

ground crew and check-in was pathetic - insisted on charging me for luggage even though the ticket said it was already included. They also accidentally sent my luggage through without a luggage tag and had to retrieve it. Generally, it was like a bad movie.

Moved the flight an hour later, were not reliable about confirmation, website didn't work, no gate information, boarding was a mad house. Flight itself was fine and short. Organization needs work.

The app on phone and the online check in is not good, it would not give me the option of Spain or Madrid City in the drop down menu and I couldn't move forward with online check in.

The seat I was stuck in was so unimaginably uncomfortable. I have never had that tight of a seat in my 20 years of flying. Even budget airlines give you more space.

We were upgraded to economy plus and everything was awesome!

I liked the crews attentiveness, all food and drink items were tasty, and came out in a timely manner. The entertainment systems were not as responsive and my seat had issues with the auxiliary for the headphones. Seats were OK, and the headrest for my seat could go back only so far. Bathrooms were tight fit.

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

Hate their old flights, boatding, food and services. Very poor quality

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

The food could be better, more snacks. And have some plugs to chargue the phone.

The pasta in the evening meal was tasteless. Otherwise, the flight was okay.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Seating was average for a first class seat. It very modern. I expected better.

Everything you need to know for your flight from Chicago to Porto

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