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ORD - OPO

Find cheap flights from Chicago to Porto from $335

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 6/25. 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.
1 adult
0 bags
mar. 6/4
mar. 6/11

Search hundreds of travel sites at once for deals on flights to Porto

 
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.
In the last 7 days travelers have searched 42,830,901 times on KAYAK, and here is why:

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
7:15 pm - 6:30 pmORD-OPO
17h 15m1 stop
8:40 am - 12:10 pmOPO-ORD
33h 30m1 stop
$783SWISS
Find Deal
mié., jul. 17 - mié., ago. 21
7:15 pm - 5:20 pmORD-OPO
16h 05m2 stops
8:40 am - 12:10 pmOPO-ORD
33h 30m1 stop
$793SWISS
Find Deal
mié., jul. 17 - mié., ago. 21
7:15 pm - 5:20 pmORD-OPO
16h 05m2 stops
6:10 pm - 12:10 pmOPO-ORD
24h 00m2 stops
$827SWISS
Find Deal
mié., jul. 17 - mié., ago. 21
1:00 pm - 10:25 amORD-OPO
15h 25m2 stops
6:00 am - 8:36 pmOPO-ORD
20h 36m2 stops
$834Air Canada
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mié., may. 8 - sáb., may. 11
5:15 pm - 3:30 pmORD-OPO
16h 15m1 stop
5:00 am - 9:57 pmOPO-ORD
22h 57m2 stops
$835Delta
Find Deal
lun., jun. 3 - lun., jun. 10
3:50 pm - 3:30 pmORD-OPO
17h 40m2 stops
5:00 am - 9:57 pmOPO-ORD
22h 57m2 stops
$839Delta
Find Deal
lun., jun. 3 - lun., jun. 10
4:35 pm - 3:55 pmORD-OPO
17h 20m1 stop
8:35 pm - 2:20 pmOPO-ORD
23h 45m1 stop
$913Iberia
Find Deal
mar., jul. 23 - vie., ago. 16
4:35 pm - 11:40 amORD-OPO
13h 05m1 stop
12:25 pm - 2:20 pmOPO-ORD
31h 55m1 stop
$956British Airways
Find Deal
mié., may. 22 - mar., may. 28
6:00 pm - 10:55 amORD-OPO
10h 55m1 stop
10:00 am - 4:15 pmOPO-ORD
12h 15m1 stop
$971TAP AIR PORTUGAL
Find Deal
lun., jul. 29 - lun., ago. 12
6:00 pm - 10:40 amORD-OPO
10h 40m1 stop
10:55 pm - 4:00 pmOPO-ORD
23h 05m1 stop
$1,001TAP AIR PORTUGAL
Find Deal
mié., jul. 31 - jue., ago. 8

Flights from Chicago to Porto - Travel Insights & Trends

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 flights from Chicago O'Hare Intl Airport to Porto clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Porto on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Chicago to Porto. For your return ticket, we recommend flying on a Monday and avoiding Fridays for the best deals.

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 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 November, where tickets cost $496 on average. On the other hand, the most expensive months are June and May, where the average cost of tickets is $851 and $838 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from Chicago O'Hare Intl Airport to Porto, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 90 days before departure.

Which airlines provide the cheapest flights from Chicago to Porto?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from Chicago to Porto found by KAYAK users in the last 72 hours was for $783 on SWISS, followed by Air Canada ($834). One-way flight deals have also been found from as low as $524 on TAP AIR PORTUGAL and from $662 on Air Canada.

Good to know

Low season

January

High season

July

Cheapest flight

$335
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 26% 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 $335 for a one-way ticket and $783 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, SkyTeam, 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?

    Madrid 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 $802 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 $813 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.

See more FAQs

Top tips for finding a cheap flight from ORD 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.
See more tips

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.
8.0
DeltaOverall score based on 10826 reviews
8.0Entertainment
8.2Boarding
7.9Comfort
8.6Crew
7.4Food
Airline reviews

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

10.0 ExcellentAllan, May 2024SUN - SLC
Read more about Delta reviews

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

The food from Lagos to Amsterdam was was very poor compared to AMS-YYZ

The flight was delayed for 2 hrs. Because they didn’t have a crew to fly. And it is not a first time for klm to do that. Last time they cancelled my filght and rebooked me 3 days later. Not reliable airline

Booked connecting flights with KlM. My serving flight was the furthest part of the airport. On arrival in Zurich. My two cases arrived but only one carry on belong to my son. His three suitcase didn't arrive. After enquiring we discovered they were still in Amsterdam. We landed at 11.12. We eventually left the airport just after one.

no issues at all... Kudos to the food. This time was really really good

Overall a good experience. We were disappointed when we had to check our carry on due to the plane being full. KLM hadn’t notified us and we had valuable items in the carry on but they still made us check it. Some of the food was great and some was mediocre. Crew is really kind and funny.

The worst airline. Cancelled flight 30 min before boarding and rebooked on flight after 3 days.

It was nice to be on a legacy airline, people try at least.

The flight itself it was great nice food the crew were very nice and helpful, Checking in from Birmingham wasn't great long queues for bag dropped, And I had my hand luggage case taken away from me even though I requested to have it with me as I had breakables items. I was told I can not because of the length of the flight with no explanation at all no options was given for me to take my fragile items out of my case it was taken away with hold buggage I find the staff member who was checking me in very unpleasant !! Can we please be advise if the rules have changed about the the carry on hand luggage it will be easier to be advise on booking your tickect if we not allowed to take the hand luggage with me. Overall I had a good flight .

The plane was clean and the staff was friendly. Food and drinks as expected on international flights. The entertainment system was old style, with a pullout controller, and selections not as extensive as on other flights.

One of their staff was so rude with discriminative. Such a reputed airline shouldn't hire such kind of arrogant attendants.

I thought Miami's airport was very disorganized during the Boarding.

Very efficient boarding - other airlines could learn from them. Friendly, efficient crew. Red eye flight, so dinner meal was irrelevant. Breakfast could have been more substantial. Seats reasonably comfy.

People seated in exit rows should have designated overhead space

I have been flying internationally for most of like. My first trip with TAP- wonderful! I look forward to flying with them more frequently in the future!

Larger seats on this plane made the ride reasonably comfortable. Our next flight, from Lisbon to Copenhagen, was inconsiderately tight and stressful. The seats were smaller, space between rows was very limited (no button or mechanism to even slightly incline anyone’s seat), and leg-cramping under the seat in front. Just like sardines in a can. Really felt for all the tall Danes on the flight. Their knees were pressed against the seat in front throughout the flight.

Flight was 2+ hrs late boarding. Delay updates were nonexistent. Boarding Gate change was by word of mouth.

The plane was modern and clean. TAP staff at the airport as well as the flight crew were professional, friendly, and helpful. Overall, a great experience.

The airline made last minute changes to our business class seats splitting our family of 4 with young children who had pre-booked a row of 4 seats. The seat was also dirty and sticky. Our pre-ordered child meals were also not available. :(

Awful experience all around, misleading booking led to disgraceful baggage charge at gate. Tiny uncomfortable seats with little drinks served in small paper cups filled halfway. Difficult to use bathrooms the whole flight and now on the way back we’re stuck in Lisbon a day later because of a diversion on our connecting flight, I will never fly this airline again.

I suspect that there was an item pilfered from my bag at the TAP automated check-in counter on March 26th at Heathrow Airport around 11:30am. I think that the employee assisting me with my bags took something out of it when I was not paying attention because today, March 27th there is a notebook missing. Please check the camera to see if indeed this occurred. My description: Male, African Decent, 5'8, 180lbs medium build, wearing trousers and a jacket. Employee description: Female, Indian Decent (guessing) 5'7, slight build. Flight 1359, London to Lisbon.

I liked the friendly crew and desk staff, all very helpful. I was surprised and a little annoyed on my outbound flight from LGW to MCO as I had prepaid and booked my seat, which was all correct at check in on my boarding pass. when I got on the plane someone was in my seat ! I was moved to another seat. The food choice is quite limited and I feel that an option of a muffin for breakfast snack would be welcomed, not everyone wants egg or bacon wrap. The choice of entertainment is good, plenty to keep you busy on a long haul flight. I liked the option offered to have the cabin bag checked into the hold, it saved me as an older, lone traveller lifting my case into the overhead locker or finding there was no space.

good service from crew. Before the would have an option between cookies or nuts as snacks.. Now, there are only cookies. too bad. People who can not have sugar don't have a choice.

I would not fly with BA again. Packed in like sardines, constant request to turn down air conditioning due to freezing cold for hours and the food was pretty to look at but tasteless!

I’m hoping for WiFi included. Everything else was very good

Pros: they tried to accommodate bc they forgot my gluten free meal Negatives: The flight was freeeeeezing Iberia didn’t communicate my gluten free meal

Rude security cunts. However the lady that issued my boarding ticket when I was flying back from New York was lovely & helpful!!

Appalling! The flight was delayed by 3.5 hours and the American Airlines staff at the airport where nit very helpful. Once boarded, the flight crew were unhelpful, the food was poor and the aircraft was tatty.

I called prior to flying to confirm our baggage allowance which was 5 bags. On our outbound flight thee were no problems. On the return flight we were charged for each bag totaling $400! We are working with customer service to resolve the issue.

Everything was great, except the food, which could have been flavorful.

Took too long to tak off but besides that it was good

We missed the flight to Barcelona because the flight from Baltimore was delayed. We flew on Vueling VW6653. Our luggage didn’t arrive. Please help us get our luggage. We are staying at Hotel Gran Via in Barcelona

The seats were tiny, being of a fairly petite build, I don’t usually expect to feel crammed and cramped in a seat, but I definitely was on this flight. I couldn’t even bend over to get anything out from under the seat in front and getting up to go to the bathroom at night with the seat backs reclined was nearly impossible. I had to do gymnastics to get over and out. For an airline that does long flights overnight, it’s kind of ridiculous.

Not connecting flights. Missed my flight from Dublin to Liverpool because I arrived at Dublin one hour too late. For this mistake, they offered me a flight from Dublin to Manchester. Thats great and all, but I waste time and money to commute to Liverpool. Be sure to check the time of your connecting flights, because they sure don’t when they sell it to you

Excellent! Great flight attendants, good food (in business class, at least), very comfortable. Touchscreen and remote wasn’t great.

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

My baggage did not arrived with me. Took 3 days to get it after so may calls and follow up

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Terrible. Flight was 3 hours delayed and I missed my other flight to my final destination

Book cheap flights from Chicago to Porto

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Chicago to Porto found on KAYAK in the last 72 hours.
6/25mar.
3 stops
25h 39mORD-OPO
$335
6/25mar.
2 stops
33h 54mORD-OPO
$370
6/25mar.
2 stops
33h 19mORD-OPO
$492
7/8lun.
1 stopTAP AIR PORTUGAL
22h 25mORD-OPO
$524
6/30dom.
1 stopTAP AIR PORTUGAL
10h 55mORD-OPO
$709
6/29sáb.
1 stopLufthansa
19h 55mORD-OPO
$897
6/24lun.
2 stopsUnited Airlines
15h 25mORD-OPO
$932
6/26mié.
2 stopsIberia
17h 35mORD-OPO
$1,104
6/30dom.
2 stopsUnited Airlines
13h 13mORD-OPO
$1,151
5/18sáb.
1 stopLufthansa
19h 55mORD-OPO
$1,412

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Last minute flights from Chicago to Porto

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Chicago to Porto that are departing in the next 10 days.
5/6lun.
multi-stopDelta
18h 05mORD-OPO
5/14mar.
multi-stopDelta
33h 20mOPO-ORD
$739
5/7mar.
multi-stopKLM
23h 55mORD-OPO
5/10vie.
multi-stopKLM
15h 20mOPO-ORD
$747
5/6lun.
multi-stopDelta
18h 05mORD-OPO
5/16jue.
multi-stopDelta
28h 40mOPO-ORD
$748
5/8mié.
multi-stopTAP AIR PORTUGAL
15h 00mORD-OPO
5/15mié.
multi-stopTAP AIR PORTUGAL
17h 15mOPO-ORD
$1,114
5/8mié.
multi-stopTAP AIR PORTUGAL
10h 40mORD-OPO
5/14mar.
multi-stopTAP AIR PORTUGAL
24h 00mOPO-ORD
$1,136
5/8mié.
multi-stopUnited Airlines
11h 41mORD-OPO
5/13lun.
multi-stopUnited Airlines
12h 28mOPO-ORD
$1,163
5/10vie.
multi-stopLufthansa
13h 20mORD-OPO
5/12dom.
multi-stopLufthansa
12h 55mOPO-ORD
$1,299
5/10vie.
multi-stopLufthansa
13h 20mORD-OPO
5/12dom.
multi-stopLufthansa
18h 25mOPO-ORD
$1,551
5/9jue.
multi-stopIberia
13h 10mORD-OPO
5/14mar.
multi-stopIberia
22h 10mOPO-ORD
$2,072
5/8mié.
multi-stopIberia
13h 05mORD-OPO
5/17vie.
multi-stopIberia
22h 10mOPO-ORD
$2,328

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Chicago - Porto Flights

Departure:

Chicago (ORD)United States

Destination:

Porto (OPO)Portugal

Return flight deals:

Porto - Chicago

Cabin classes:

Browse destinations: