ORD - OPO

$262 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 10/18. 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

Mon, Aug 11 - Wed, Aug 27
TAP AIR PORTUGAL Logo
6:10 pm - 7:00 pmORD-OPO
18h 50m1 stop
TAP AIR PORTUGAL Logo
10:25 pm - 12:50 pmOPO-ORD
20h 25m1 stop
$481TAP AIR PORTUGAL
Find Deal
Tue, Nov 11 - Tue, Nov 18
SWISS Logo
7:05 pm - 11:15 amORD-OPO
34h 10m1 stop
SWISS Logo
12:05 pm - 4:15 pmOPO-ORD
34h 10m1 stop
$483SWISS
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Wed, Nov 12 - Tue, Nov 25
United Airlines Logo
2:30 pm - 9:30 amORD-OPO
13h 00m1 stop
United Airlines Logo
6:00 am - 1:10 pmOPO-ORD
13h 10m1 stop
$485United Airlines
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Thu, Oct 9 - Fri, Oct 24
TAP AIR PORTUGAL Logo
6:00 pm - 8:25 pmORD-OPO
20h 25m1 stop
TAP AIR PORTUGAL Logo
9:00 am - 4:10 pmOPO-ORD
13h 10m1 stop
$487TAP AIR PORTUGAL
Find Deal
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 - 6:30 pmOPO-ORD
18h 30m2 stops
$495United Airlines
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Wed, Nov 12 - Tue, Nov 25
Iberia Logo
4:45 pm - 11:45 amORD-OPO
13h 00m1 stop
Iberia Logo
8:40 pm - 7:45 pmOPO-ORD
29h 05m2 stops
$519Iberia
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Sat, Jan 10 - Tue, Jan 20
Lufthansa Logo
9:15 pm - 11:40 amORD-OPO
32h 25m2 stops
Lufthansa Logo
6:00 am - 1:10 pmOPO-ORD
13h 10m1 stop
$524Lufthansa
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Sat, Jan 10 - Tue, Jan 20
Lufthansa Logo
9:15 pm - 11:40 amORD-OPO
32h 25m2 stops
Lufthansa Logo
6:00 am - 6:21 pmOPO-ORD
18h 21m2 stops
$528Lufthansa
Find Deal
Tue, Nov 11 - Tue, Nov 18
KLM Logo
1:35 pm - 10:30 amORD-OPO
14h 55m2 stops
KLM Logo
11:25 am - 9:46 pmOPO-ORD
16h 21m2 stops
$532KLM
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Thu, Jan 8 - Thu, Jan 22
Iberia Logo
11:40 am - 7:40 amORD-OPO
14h 00m2 stops
Iberia Logo
8:20 am - 2:30 pmOPO-ORD
12h 10m1 stop
$553Iberia
Find Deal
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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. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
High seasonSeptember
Cheapest flight$262
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 7% 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 $262 for a one-way ticket and $481 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, oneworld, and SkyTeam 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, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Chicago to Porto are Delta and KLM. With an average price for the route of $733 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $712 and an overall rating of 7.8.

  • 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 1372 reviews
7.3Food
7.8Boarding
7.7Comfort
8.4Crew
7.1Entertainment
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!

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

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

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

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

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

Terrible! I had to cancel our flights due to my wife Carmen requiring an unexpected second cancer surgery. I first contacted orbitz about obtaining a credit due to medical interruption and orbitz directed me to TAP. I contacted TAP and the representative directed me back to orbitz and refused to even explain what TAP’s medical interruption policy was or how it worked—I wanted that information for a second call to orbitz. Terrible service at a particularly difficult time.

Food was edible, not great, and served by attendants who looked like they really were not happy working the flight. The section I was in was too warm making the 11 hour flight uncomfortable. Other areas on the plane were fine.

I’ve never had worse food in business class ever!

Checked bG chstgr was extremely high. Over $120. It was s bsit and switch knowing an international passenger would have t9 check a bag.

First, communication was terrible. The gate on our ticket was not what was reflected on the airport screens and TAP personnel were not present at either gate to answer questions. The flight was delayed and there was no announcement. Also, there was an equipment swap to a smaller airframe which affected our level of comfort. The root of all these issues was as a lack of communication. With air travel in foreign countries already being a stressful affair, lack of communication needlessly raises the level of difficulty.

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.

Flight was delayed 3 hours and 15 minutes. The delay caused me to miss my tour group due to arriving late.

As always a terrible experience. AA stole a day from my vacation days planned to be spent with my Family. Response: delays related to weather issues.

It was a wonderful experience with great food, great staff, and no difficulties boarding!

We had almost a 6 hr delay, primarily due to weather, the e problem was that they communicated this delay and its length very poorly. The boarding was chaotic - even though they had hours to figure it out! The plane was an old 747 whose touch screens barely worked and there was a faulty USB port under my seat rest (something that wasn't labeled as being there) They organized my delayed luggage well. And I could get updates on the Lufthansa website. My shirt connecting flight charged for everything except water. Coffee was over 3€

We were charged for luggage, and our ticket was with Lufthansa and was supposed to include luggage fees. So our experience was a bit bad. Also, the flight was about 45 minutes late arriving.

Flight was great only departure was delayed to saome ground crew issues

It was freezing. I asked crew member for a blanket and was told it might be in front of plane but I never got one. I turned off all the vents but still froze.

Cheapest airlines I have ever been on. I got downgraded and never got on united. I got rerouted through Vancouver onto jetwesf

Flight was 1.5 hours late to depart so changed flights to Swiss Air.

The United Airlines crew that operated this flight was subpar. They didn’t

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

Checkin took along timen only.few angents available at.checkin desk. Customer support over phone no existence

At baggage claim, I was given the wrong printed ticket. The ticket belonged to another passenger for a different flight — to Zurich instead of Frankfurt (layover). I was even allowed to pass security, and when I asked the Lufthansa employee if I was on the correct flight, and why it was changed. The employee said everything was correct and I should board. When I got on the plane, there was someone in my seat, and the crew on the plane finally realized that I was on the wrong plane. When I got off the plane, nobody was willing to help, and the security refused to provide my original printed ticket. That was until I showed them that I took a photo of the ticket; once they realized I had photographic evidence, they were suddenly ready to help me. The Lufthansa employee began communicating with other airlines and found a flight that would take me to my destination via Polish Airlines. I was required to once again go through security, re-check my bag, and once again pay for my checked bag and weight overage fees. This experience was incredibly stressful and very frustrating, as you can imagine. A Lufthansa employee told me I would be eligible for a refund. Please tell me what steps I need to take in order to make that happen. Thank you!

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