ORD - OPO

$274 Find Cheap Flights from Chicago to Porto - 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 Chicago to Porto departing on 9/25. 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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Everything you should know

Cheapest round-trip
$613
Typical prices: $684-$955
TAP AIR PORTUGAL
ven. 12/4sam. 12/12
ORD - OPO • 1 stop
Cheapest one-way
$274
Typical prices: $456-$546
Multiple Airlines
ven. 9/25
ORD - OPO • 2 stops
Top airlines
Cheapest • from $613 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Chicago and Porto. You'll need at least 1 connection.
Insights
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Insights
Insights
Top layover airports
Cheapest • Avg $537 (round-trip)
Shortest trip • 11h 10m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 30% price drop
Most popular
Good to know
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Booking Insights
Flight Deals

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

ven., déc. 4 - sam., déc. 12
TAP AIR PORTUGAL Logo
8:10 pm - 1:30 pm
ORD
-
OPO
11h 20m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 3:30 pm
OPO
-
ORD
27h 30m
1 stop
$613TAP AIR PORTUGAL
mer., sept. 23 - mer., oct. 7
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
5:05 am - 4:00 pm
OPO
-
ORD
16h 55m
1 stop
$614TAP AIR PORTUGAL
dim., sept. 20 - mar., oct. 6
TAP AIR PORTUGAL Logo
6:00 pm - 5:00 pm
ORD
-
OPO
17h 00m
1 stop
TAP AIR PORTUGAL Logo
9:15 pm - 4:00 pm
OPO
-
ORD
24h 45m
1 stop
$631TAP AIR PORTUGAL
dim., sept. 20 - jeu., oct. 1
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
7:00 am - 12:40 pm
OPO
-
ORD
11h 40m
1 stop
$632TAP AIR PORTUGAL
mer., sept. 23 - mer., oct. 7
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
5:05 am - 4:00 pm
OPO
-
ORD
16h 55m
1 stop
$633TAP AIR PORTUGAL
sam., sept. 26 - sam., oct. 10
TAP AIR PORTUGAL Logo
6:05 pm - 3:00 pm
ORD
-
OPO
14h 55m
1 stop
TAP AIR PORTUGAL Logo
10:00 am - 4:05 pm
OPO
-
ORD
12h 05m
1 stop
$638TAP AIR PORTUGAL
lun., nov. 23 - lun., nov. 30
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
Scandinavian Airlines Logo
11:55 am - 4:45 pm
OPO
-
ORD
34h 50m
1 stop
$643Scandinavian Airlines
lun., nov. 2 - mer., nov. 11
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
Scandinavian Airlines Logo
11:55 am - 4:45 pm
OPO
-
ORD
34h 50m
1 stop
$644Scandinavian Airlines
mer., sept. 23 - ven., oct. 9
TAP AIR PORTUGAL Logo
6:00 pm - 8:25 pm
ORD
-
OPO
20h 25m
1 stop
TAP AIR PORTUGAL Logo
10:00 am - 4:00 pm
OPO
-
ORD
12h 00m
1 stop
$654TAP AIR PORTUGAL
ven., nov. 27 - sam., déc. 5
TAP AIR PORTUGAL Logo
8:10 pm - 7:00 pm
ORD
-
OPO
16h 50m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 3:30 pm
OPO
-
ORD
27h 30m
1 stop
$657TAP AIR PORTUGAL
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.

How much is a round-trip flight from Chicago O'Hare Intl Airport to Porto?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Chicago O'Hare Intl Airport to Porto departing in December.

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 January, where tickets cost $558 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,291 and $1,050 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low seasonJune
Cheapest flight$274
Best time to beat the crowds but there is an average 60% increase in price.
Most popular time to fly with an average 1% 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 5 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Porto was $274 for a one-way ticket and $613 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?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Chicago and Porto, with SkyTeam 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, KLM or United Airlines?

    The two airlines most popular with KAYAK users for flights from Chicago to Porto are KLM and United Airlines. With an average price for the route of $679 and an overall rating of 7.8, KLM is the most popular choice. United Airlines is also a great choice for the route, with an average price of $790 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.
7.4
United AirlinesOverall score based on 9951 reviews
7.3Comfort
8.1Crew
7.1Entertainment
7.7Boarding
6.7Food
Airline reviews

The kid in the middle seat kicked me almost the whole flight, almost kicked my hot tea off my tray. The flight was delayed due to the first plane not being able to be de-iced in July! We had to get a new plane. Now I drive 3 hours back to Edmonton because direct flights from PVR were way to expensive

2.0 MediocreAnonymous, Jul 2026
ORD - YYC
Read more United Airlines reviews

The kid in the middle seat kicked me almost the whole flight, almost kicked my hot tea off my tray. The flight was delayed due to the first plane not being able to be de-iced in July! We had to get a new plane. Now I drive 3 hours back to Edmonton because direct flights from PVR were way to expensive

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Know that the movies that you are going to be offered are the oldest be rated movies they could possibly get. They may have one or two new movies that they keep advertising but when you’re flying 15 hours, there is nothing to see past the first new movie.

Agents at gate were not immediately available to solve problems and once they did they didn’t fix all the fight connections

Great experience. Boarding was fast, staff were very nice and funny, everything at the seat worked well.

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

Smooth travel. Immediate update prior flight delay so I can arrange myself properly without too rush.

Boarded early; and arrived home 40 mins early. After a long flight, it’s nice to be back home early. These flights have no amenities; no snacks. So need to bring your own

A long delay. Don't travel late in the day.

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

Everything was good with Tap Air Portugal. It was Logan Airport that was a problem. The fuel system was down and delayed my 10:40 boarding. I wasn't able to board my flight until 2:00 am...after that my flights were great.

Not have my bag forced to be checked when I had a carry on included on my ticket. Staff was very rude to me for asking why they were doing this. I was told there was no more room for carry ons but there was plenty of space in the overhead compartments

The crew was excellent. What I did not enjoy was the food. I have taken many international flights and this was on the low end. Otherwise the trip was fine.

The flight crew were absolute rock stars. When they came to the gate they looked like royalty, so chic. They also were extremely kind. Food was good and I loved the lack of plastic waste. The flight was lovely and smooth.

We were unable to check in due to technical problems on TAP’s end. The flight was delayed forty minutes with no reason given. We received timely notice of the flight delay. We were also notified of a gate change. The new gate was at a different terminal. When we got to the new terminal, we learned that we had to go back to the old terminal first to check in. This information should have been included along with the gate change notification. Also unexplained, the steward skipped us when offering breakfast.

Check in was excellent thanks to the team at the check in counter. I was disappointed to see that one has to pay for coffee on the flight. This is the first time I have seen that after 60 years of flying.

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.

Checkin was very slow, we had checked in online and hoping we could do a bag drop at the airport. However everyone with checked bags had to queue up and it took over 40mins. Our advice arrive extra early or you will be rushing to the gate.

Our flight from NY was on time. The leg room was torture.. for a long flight.. It was extremely uncomfortable.

Plane was late and they forced us to take the stairs (no elevator available) to catch the bus to the plane. My wife was carrying a baby and fell. Terrible experience and terrible air line. Constantly late and conditions seem to be getting worse every time I have to use them.

I was very unhappy with the lack of communication from the cockpit. It took close to a half an hour before we took off after the doors were closed, and we got no announcements as to progress. It would be nice to get some acknowledgement of the situation and updates as to when we are taking off.

The seat was not even cleaned. It has full of cookie crums probably from last flight's passenger. Its basic expectation that, seats are clean.

Very turbulent flight, no drinks, very little service, unorganized boarding, gate changed multiple times

The flight was delayed significantly. Communication during the flight was abrupt and caused some panic as we were navigating turbulence. It was also too loud and every announcement felt startling. The flight attendants did not offer any assurances and I felt unsettled most of the flight. The seats, floor and tray table was very dirty. The seat next to me was broken and the passenger sitting there was very uncomfortable. He had a spring in his back and his seat made terrible squeaking noises through the flight.

Significant delays on my trip to Chicago and my trip back to NY

Delayed by 5 hours and I had to wit in the airport for more than 6+ hours.

I’ve got 31F seat and window seat . My 2 co passengers was AA crew members and they were very rude attitude and when I was going to use bathroom their gestures was very different and awkward and the guy beside me completely occupied the hand rest and I was really uncomfortable

It was so much better than expected, Ohare is not such a pleasant experience but American Airlines with the new, clean aeroplane and free Wi-Fi was outstanding and the crew so pleasant and helpful.

It wa sort of on time; the cab was left with some trash

My pillow had a shoe print on it, when I asked if I can have another pillow, I was told “I’m sorry but it is one pillow per guest, do YOU want to turn it inside out” to which I responded , no thanks I will go without. This is generally not ok, but For the price tag I paid flying business this is absolutely unacceptable. Hopefully American Airlines can update their accommodations to bedding that is not tossed on the ground and stepped on, or at least have a couple of extra pillows in hand, incase someone had decided to step on the pillows for what ever reason

The staff was very nice and helpful. Some of the best crew I have met.

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

It was extremely cold in the back of the plane. The seats are uncomfortable and space very small. Crew was excellent as usual.

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

I was in business class for the 8 hour flight where: 1. The WiFi did not work 2. The entertainment system did not work 3. We were told there were no hot drinks for the entire flight

Paid for “extra room” selected seat. Wasn’t a benefit. Also was in aisle and was bumped almost every time attendants walked down aisle. Should have saved the assigned seat money and let them select.

Alaska located my mother, aware that she had mobility issues and they seated her closer to the door. She and I were seated together so I felt more secure to be able to assist her. The desk attendant reviewed what steps to take when boarding. Allowed us to board first, we loved that. I was allowed time to help her board slowly, seat her, put all her things in their place before the crowds came through. These small details made me want to travel Alaska more when possible.

I bought the ticket through Iberian, but I was unable to check in using my code. American wouldn’t let me check in and Iberian counter was closed.

The comfort level was low, but the staff was nice

Bad. Requested a diabetic meal. Was served everything i couldnt eat. So i did not estbthe whole flight dinner / breakfast. Sad and uncomfortable.

It was okay. Mothers with rowdy children should be invited to sit in front of them.

Good food, overall very comfy. The flight was full so obviously not optimal, but it is what it is.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

The row of seats were so cramped it was difficult to get in and out of your seat. I even upgraded. A long flight and sad accommodations 😵‍💫 the shorter flight was very comfortable and the seating was spacious

I have flown with many airlines. My first time was several years ago. Now I remember why I avoided them for so long. Lufthanza is the only airline who has ever raised a size/weight issue with my modest standard size carry on. I had to repack three times to meet their carry-on weight criteria. (Apparently the rules of physics apply differently on Lufthansa flight than on other airlines.) In the meantime their staff was quite rude, repeating meaningless phrases like "Rules are Rules." And ignoring the additional fact that weight is also weight, whether it is in found in your carry on or in your suitcase. They eventually acknowledged that customer service and satisfaction is, for them, a low priority. Never choosing Lufthansa again.

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

Information on your arrival and departure airports