$319 Find Cheap Flights from Portugal to Chicago

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Chicago departing on 2/4. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Chicago, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Chicago, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$463
Overall average: $721
Scandinavian Airlines
Tue 4/14Fri 4/24
LIS - ORD • 1 stop
Cheapest non-stop
$796
TAP AIR PORTUGAL
Fri 4/17Sat 4/25
LIS - ORD • Non-stop
When to travel
February
Cheapest • 18% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Chicago!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portugal to Chicago

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portugal to Chicago that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portugal to Chicago

Tue, Apr 14 - Fri, Apr 24
Scandinavian Airlines Logo
4:25 pm - 4:10 pmLIS-ORD
29h 45m1 stop
Scandinavian Airlines Logo
7:15 pm - 3:35 pmORD-LIS
14h 20m1 stop
$463Scandinavian Airlines
Find Deal
Sat, Nov 22 - Fri, Nov 28
Scandinavian Airlines Logo
5:10 pm - 4:45 pmFAO-ORD
29h 35m1 stop
Scandinavian Airlines Logo
7:20 pm - 4:20 pmORD-FAO
15h 00m1 stop
$467Scandinavian Airlines
Find Deal
Fri, Nov 14 - Thu, Nov 27
Scandinavian Airlines Logo
5:35 pm - 4:45 pmOPO-ORD
29h 10m1 stop
Scandinavian Airlines Logo
7:20 pm - 4:55 pmORD-OPO
15h 35m1 stop
$480Scandinavian Airlines
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Wed, Jan 21 - Mon, Jan 26
Multiple Airlines Logo
4:55 pm - 4:45 pmLIS-ORD
29h 50m1 stop
Multiple Airlines Logo
7:20 pm - 9:30 pmORD-LIS
20h 10m1 stop
$558Multiple Airlines
Find Deal
Sat, Nov 22 - Sun, Jan 18
TAP AIR PORTUGAL Logo
6:00 pm - 2:45 pmOPO-ORD
26h 45m1 stop
TAP AIR PORTUGAL Logo
8:25 pm - 5:00 pmORD-OPO
14h 35m1 stop
$569TAP AIR PORTUGAL
Find Deal
Sat, Feb 21 - Sun, Mar 1
Multiple Airlines Logo
7:05 am - 4:45 pmLIS-ORD
15h 40m1 stop
Multiple Airlines Logo
7:20 pm - 4:30 pmORD-LIS
15h 10m1 stop
$605Multiple Airlines
Find Deal
Wed, Dec 17 - Wed, Jan 7
Lufthansa Logo
12:30 pm - 8:05 pmOPO-ORD
13h 35m1 stop
Lufthansa Logo
6:00 pm - 1:15 pmORD-OPO
13h 15m1 stop
$775Lufthansa
Find Deal
Fri, Nov 21 - Sun, Dec 7
Lufthansa Logo
12:30 pm - 8:05 pmOPO-ORD
13h 35m1 stop
Lufthansa Logo
6:00 pm - 12:50 pmORD-OPO
12h 50m1 stop
$780Lufthansa
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Wed, Apr 1 - Sun, Apr 5
American Airlines Logo
8:00 pm - 2:26 pmFAO-ORD
24h 26m2 stops
American Airlines Logo
9:40 am - 10:20 amORD-FAO
18h 40m2 stops
$1,063American Airlines
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Wed, Apr 1 - Sun, Apr 5
American Airlines Logo
8:00 pm - 2:26 pmFAO-ORD
24h 26m2 stops
American Airlines Logo
9:40 am - 10:20 amORD-FAO
18h 40m2 stops
$1,071American Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for flights to Chicago

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

What is the cheapest month to fly to Chicago?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Chicago, 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 to Chicago is February, where tickets cost $643 on average for one-way flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Portugal is $966 and $933 respectively. For return trips, the best month to travel is February with an average price of $643.

Which is the cheapest airport to fly into in Chicago?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Chicago is Chicago Greater Rockford Airport, with an average flight price of $153.

Good to know

Low seasonMarch
Cheapest flight$319
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 20% increase in price.
Flight from Porto to Chicago

FAQs - booking Chicago flights

  • Which Chicago airport is closest to central Chicago?

    Chicago is served by 3 major airports. Chicago Midway Airport (9 miles) is the closest to the center of Chicago. Chicago O'Hare Airport is 16 miles from the center and Chicago Greater Rockford is 79 miles away from the center.

  • How much is a flight to Chicago?

    On average, a flight to Chicago costs $809. The cheapest price found on KAYAK in the last 2 weeks cost $559 and departed from Lisbon Humberto Delgado Airport.

  • What is the cheapest day to fly to Chicago?

    Based on KAYAK data, the cheapest day to fly to Chicago is Thursday where tickets can be as cheap as $748. On the other hand, the most expensive day to fly is Sunday, where prices are $1,111 on average.

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

    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 to Chicago.

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

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

    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 Chicago with an airline and back with another airline.

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

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

  • What is the cheapest time of day to fly to Chicago?

    The cheapest time of day to fly to Chicago is generally at night, when flights cost $622 on average. The most expensive time of day to fly to Chicago is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,209.

Top tips for finding cheap flights to Chicago

  • Looking for a cheap flight? 25% of our users found flights on this route for $635 or less one-way.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Chicago flight deals.

Reviews of the top 3 airlines serving from Portugal to Chicago

 
See real verified KAYAK customer reviews for airlines flying to Chicago. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to Chicago. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Chicago? 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.
7.2
American AirlinesOverall score based on 11030 reviews
8.0Crew
7.2Comfort
6.4Food
6.9Entertainment
7.5Boarding
Airline reviews

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

8.0 ExcellentKrishna, Oct 2025BOS - ORD
Read more American Airlines reviews

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Flight, food and crew were all good, friendly and very satisfactory.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

This was the best 2 flights I have had with American out of SGF. Great crew both flights.

Premium economy seat was decent. As always poor headphones, poor food and beverage, crew is not overly friendly

Excellent - explanations were clear staff was nice and flight was comfortable

Lost bag and 2 days no word leaving for cruise no clothes or stuff

The flight was on time and crew were nice, seats were tight and there was entertainment available

My experience with Aer Lingus was not too good. First, because of the last minute delayed flight from Amsterdam to Dublin we almost missed our flight from Dublin to Philadelphia. Secondly, the flight from Dublin to Philadelphia had very uncomfortable seats especially it was a very long flight. My buttocks were constantly in pain for sitting on these seats for this long. Lastly, the service in the plane was also slow. I asked for a second cup of water and the hostess told me he'll be right back with that where it took him over an hour to come back with water. It was warm in the plane and I was very thirsty. Overall this airline needs much improvement in their services.

I think the extra charges for seating with no added advantage and the added charges for baggage are excessive compared to other airlines.

Experience was great overall. However, the connection time between my flights (1hr 15 mins) was too short. We had to get through security check and US immigration in that time, and I made it to the gate just as they were announcing it was about to close. Flights with such a short connection time should maybe not be offered for purchase, or an advance alert would be helpful. Other than that the in-flight experience was excellent, especially the food. Many thanks!

The seats needs to be comfortables, at least please add more padding to the seats.

Incredible service. Incredible entertainment. I felt like they just kept serving us something new avery hour. My wife and I both had a joyous flight.

Aer Lingus unfortunately seems more like a budget airline than a national carrier. The plane was fine. The crew seemed a bit hurried and without that Irish charm (which may be an inappropriate stereotype and maybe not to be expected on a long international flight but other carriers seem to pull it off). My biggest complaint was that my gold status on Alaska Airlines--which gets me into lounges with BA and other partner airlines--was not accepted at lounges in Rome or Dublin, despite Aer Lingus on paper anyway partnering with Alaska. But the flight itself through Kayak was several hundred dollars cheaper than others, so overall, the right decision. Also, be aware that US customs on flights from Dublin occurs in Dublin (like Canadian airports) so if you have a connection or are just departing from Ireland, give yourself enough time (up to 30 minutes) to negotiate all of the lines. Still better than going through customs in the US after a 10 hour flight.

I was so grateful for the kindness of the crew. They made a long trip very pleasant. Food was delicious. Many movie options

My flight from Dublin was delayed two hours which ment that I missed my connecting flight to Phoenix. American Airlines provided a hotel room and rebooked my flight for 7:30 AM the next day. I didn't get to the room until 11 pm and I had to be at the airport the next day by 5 AM. The airlines did their best but the schedule was challenging for an 81 year old.

Dinner was fabulous. Would have enjoyed a wine with it. None offered... for sale??? Breakfast was disappointing but adequate amount of food.

Dublin airport is big and US Customs and Immigration screening officers are is part of the process there. This eliminates screening upon arrival to US, however should be taken into consideration when playing your transfer. After all, pleasant experience enhanced by draft Guinness and Irish coffee at the buffet area near the gate. We loved boarding by the row, back of the airplane first.

There was no warning that they have added passport control after check in, the line was enormous and after 46 mins wait we missed our flight. Were forced to leave the airport and purchase new tickets at full price to board a later flight. TAP were unsympathetic and unhelpful.

Boarding we were jammed into a hot crowded bus waiting too long while another bus went in front of us. Appreciated blanket and pillow, movie available helped time pass, the food was not appealing so I had my own snacks, the flight is long, but nothing they can do about that. Staff adequate, flight good.

Did not enjoy the meal provided. The aircraft was dirty. For instance, the screen seemed to have been cleaned with a dirty rag. Disgusting.

The person at the checkin was very helpful. We couldn’t check in through the keyosk, but the agent was very helpful.

Great price for really nice seats and the plane and staff were great, only 5-10 minute delays!

Tap was very frustrating in Lisbon. Not enough direction and help. Mixed messages of where we needed to go. Seats were not very comfortable.

Everything went as expected. Luggage arrived at my same destination and nothing disturbed my vacation.

This flight arrived late. We joined well over a thousand of other people waiting to go through customs. Air Portugal has lost my bag. We had to chase down a representative even though we had waited at the baggage claim for well over 1 hour and 35 minutes for baggage to come. No representative was there to explain the delay or to give any direction. After 1 hour and 35 minutes at least four passengers had no baggage to pick up or had a fraction of their baggage. The representative was a young woman who clearly did not have the experience to deal with what was happening. Very disappointing as of course we were dealing with great amount of jet lag and having been up for 24 hours at that point and not being able to have any of the things necessary at home that were contained in the bag was quite upsetting. That instant occurred last night at approximately 11:15 p.m. and as of 12:30 p.m. the next day I have not heard anything from Air Portugal.

Check-in guidance for transfer flight, boarding, in-flight service, seat comfort, etc.

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!

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
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Everything you need to know for your flight to Chicago

Cabin class types available on flights to Chicago

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

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