$374 Find Cheap Flights from Portugal to Chicago O'Hare Airport

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 4/29. 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 O'Hare Intl Airport

 
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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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

Fri, May 22 - Tue, May 26
Scandinavian Airlines Logo
9:15 pm - 4:10 pm
LIS
-
ORD
24h 55m
1 stop
Scandinavian Airlines Logo
7:15 pm - 3:35 pm
ORD
-
LIS
14h 20m
1 stop
$698Scandinavian Airlines
Thu, Apr 16 - Mon, Apr 20
Multiple Airlines Logo
12:50 pm - 9:40 am
FAO
-
ORD
26h 50m
2 stops
Multiple Airlines Logo
11:25 am - 11:30 pm
ORD
-
FAO
30h 05m
2 stops
$715Multiple Airlines
Fri, May 22 - Tue, May 26
Scandinavian Airlines Logo
9:15 pm - 4:10 pm
LIS
-
ORD
24h 55m
1 stop
Scandinavian Airlines Logo
7:15 pm - 3:35 pm
ORD
-
LIS
14h 20m
1 stop
$722Scandinavian Airlines
Thu, Apr 16 - Mon, Apr 20
Aer Lingus Logo
11:45 am - 7:15 pm
FAO
-
ORD
13h 30m
1 stop
Aer Lingus Logo
9:00 pm - 7:25 pm
ORD
-
FAO
16h 25m
1 stop
$726Aer Lingus
Wed, May 20 - Wed, May 27
Multiple Airlines Logo
8:25 am - 10:01 pm
OPO
-
ORD
19h 36m
2 stops
Multiple Airlines Logo
9:55 am - 11:55 am
ORD
-
OPO
20h 00m
1 stop
$726Multiple Airlines
Wed, May 20 - Wed, May 27
Multiple Airlines Logo
8:25 am - 7:40 pm
OPO
-
ORD
17h 15m
2 stops
Multiple Airlines Logo
2:15 pm - 6:45 am
ORD
-
OPO
34h 30m
2 stops
$728Multiple Airlines
Thu, Apr 30 - Mon, May 4
Multiple Airlines Logo
10:15 am - 7:15 pm
FAO
-
ORD
15h 00m
1 stop
Multiple Airlines Logo
9:00 pm - 11:30 pm
ORD
-
FAO
20h 30m
1 stop
$741Multiple Airlines
Thu, May 21 - Thu, May 28
Scandinavian Airlines Logo
10:30 am - 4:10 pm
OPO
-
ORD
35h 40m
1 stop
Scandinavian Airlines Logo
7:15 pm - 5:05 pm
ORD
-
OPO
15h 50m
1 stop
$756Scandinavian Airlines
Wed, May 6 - Mon, May 18
Aer Lingus Logo
10:15 pm - 2:00 pm
LIS
-
ORD
21h 45m
1 stop
Aer Lingus Logo
9:00 pm - 9:35 pm
ORD
-
LIS
18h 35m
1 stop
$763Aer Lingus
Fri, May 22 - Fri, Jun 19
Aer Lingus Logo
10:15 pm - 2:00 pm
LIS
-
ORD
21h 45m
1 stop
Aer Lingus Logo
9:00 pm - 9:35 pm
ORD
-
LIS
18h 35m
1 stop
$775Aer Lingus
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 flight to Chicago O'Hare Airport?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to Chicago O'Hare Airport was found on the route from Lisbon, at $698 return. The most popular connection is from New York to Chicago O'Hare Airport and KAYAK users have found round-trip deals for as low as $112 in the last 3 days.

What is the cheapest day to fly to Chicago?

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

Based on KAYAK data, the cheapest day to fly to Chicago is Thursday where round-trip tickets can be as cheap as $748. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $1,205 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Chicago O'Hare Intl Airport, 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 O'Hare Intl Airport is February, where tickets cost $695 on average for return flights. On the other hand, the most expensive months are August and January, where the average cost of tickets from Portugal is $1,211 and $1,137 respectively. For one-way flights, the best month to travel is February with an average price of $695.

What is the cheapest time of day to fly to Chicago O'Hare Intl Airport?

The average price for all round-trip flights to Chicago O'Hare Intl Airport depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Chicago O'Hare Intl Airport is generally in the afternoon, when round-trip flights cost $886 on average. The most expensive time of day to fly to Chicago O'Hare Intl Airport is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,056.

Good to know

Low seasonNovember
Cheapest flight$374
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 9% increase in price.
Flight from Lisbon to Chicago

FAQs - booking Chicago O'Hare Airport flights

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

    In the last 3 days, the cheapest flight deal to Chicago O'Hare Airport was found on the route from Lisbon, at $698 return. The most popular connection is from New York to Chicago O'Hare Airport and KAYAK users have found round-trip deals for as low as $112 in the last 3 days.

  • How far is Chicago O'Hare Intl Airport from central Chicago?

    You’ll need to travel 16 miles to reach the Chicago city center from Chicago O'Hare Intl Airport.

  • How much is a flight to Chicago?

    On average, a flight to Chicago costs $815. The cheapest price found on KAYAK in the last 2 weeks cost $592 and departed from Lisbon Humberto Delgado Airport.

  • How does KAYAK find such low prices on flights to Chicago O'Hare Airport?

    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 O'Hare Airport.

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

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

    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 O'Hare Airport 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 O'Hare Airport?

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

Top tips for finding cheap flights to Chicago O'Hare Airport

  • Looking for cheap airfare to Chicago O'Hare Airport? 25% of our users found round-trip tickets to Chicago O'Hare Airport for the following prices or less: From Lisbon $1,550
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Chicago O'Hare Airport flight deals.

Reviews of the top airlines flying 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.
7.4
United AirlinesOverall score based on 9546 reviews
7.1Entertainment
7.3Comfort
7.7Boarding
6.6Food
8.1Crew
Airline reviews

Food and drink service was very low quality. The flight attendants in business class must have been short some staff. Service was sluggish and not much English was spoken

6.0 GoodAnonymous, Apr 2026
NRT - ORD
Read more United Airlines reviews

Food and drink service was very low quality. The flight attendants in business class must have been short some staff. Service was sluggish and not much English was spoken

The flight was officially delayed 3 times, and was actually later than that. Combined, it was a 3 hour delay, but there was no recognition (miles, voucher, etc). The crew seemed stressed. The captain sounded nervous in his announcements. The flight itself was smooth and uneventful.

Just a bad day to fly. Flight was delayed from scheduled 6:50 pm departure to 8:50 pm. Combination of factors mostly related to weather at the destination airport (which is where the incoming flight originated) which delayed the inbound flight over an hour. Once on board, we taxied but had to hold again on the taxiway for 10 minutes or so. We did not get wheels up until after 9 pm. The flight was smooth but about 18 minutes from our destination, we had to hold for several minutes more due to weather at ORD. We finally landed at ORD about 11:08 pm (accounting for the time difference, that was about a 3 hour delay from our scheduled departure time). It felt like we were never going to get to our destination. But the flight crew and attendants were very good. The movie selection onboard was also very nice. Got to watch half of a movie just during our taxi from the gate at ATL due to the delay!

3 hour delay…. Nearly 2 hours sitting on tarmac. Do better, United. Or at least have the sense to not say “we hope you enjoyed your flight with us” upon disembarking.

Flights were on time. Free Wifi on plane. Everything was well organized.

Economy plus was so cramped I could not use my laptop. It was beyond bad.

Would've been great if Lufthansa union cockpit pilots didn't strike for 2 days and caused a chaos to my returning plans to USA, and then after rebooking a flight 2 days later tge plane departed 35 min later. So I did not have a good experience.

They never clean the toilet, and the food is worse

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Chargers didn’t work, no entertainment and we had to wait for taxiing for easily 40 minutes after arriving early. Bags were late too!

The crew was great. There was a big guy sitting next to me who was hanging over my side of the armrest the entire time. Maybe some information about "Be considerate of your neighbors, this is tight space, be kind". The breakfast sandwich was not appealing at all.

Kayak let me choose these flights on TAP but then after 2 months, cancelled my flights because they didn't think 90 minutes was enough time for the connection. I notice that neither flight was actually cancelled. Just my reservation. Why let me go through all of that effort to find the right flights for us, only to cancel it from underneath us 2 months later leaving us scrambling to find an alternative?

It was a good experience overall. We were however delayed by over 3 hours due to a security issue with one of the passengers inadvertently leaving a power bank in a luggage she was using as carrying on but then had to be moved int check in due to spacing issues. The airline staff had requested that she checked her bags in, but should have reminded her about removing all hazardous material like her power bank. When she eventually remembered as we were on the plane, we had to turn back and go through security all over again. Hence delaying our takeoff. The incident could have been prevented if staff reminded these passengers to remove their power banks.

this flight was awful from pre-boarding to on the plane. There needs to be more coordination between TAP and My Way. We were in first class and I am handicapped. BY the time we got on the plane there was no place for our baggage and the crew did not handle the situation well. They gave us an argument and said that we'd have to have it checked. Then, after I complained they moved some people's bags to put our small carry ons several seats back of our seats which were in Row 4.

Bad. They gave me a voucher for food to use at the airport but didn’t have time since I had to catch the other plane. No refunds and lack of communication

Negative. Food was awful, seat broken, flight was late, baggage lost and damaged

The ground staff did not load my bag onto the plane and despite me watching from the bus that my bag is not being loaded and taken back on the cart to the terminal, I pointed out to the staff and ge laughed upon checking my tag and knowing they made a mistake. Instead of calling the cart back and loading it he said we can’t fo anything and you should file a report upon landing at RAK. I told them my stay there is short and i needed my bag as it had everything I needed but no avail. Even the pilot was informed, staff of the plane was aware but all in don’t care mode. Upon arriving at Marrakech RAK, i filed a report and being told it might come in next flight tomorrow and we don’t provide delivery service, you must come and pick it up. If it doesn’t arrive on time then it will be sent to your home in the US. Unbelievable stress and inconvenience that could have been easily prevented by the ground staff.

The cabin crew were curt, not with me, but observed with other passengers. They were unduly rude and it was unprovoked and when they realized they were wrong, they made no attempt to apologize for their own confusion.

I was disappointed of the crew, not friendly and attentive. Delay one way for fuel leakage and the plane is so hot. Not that great all around but I’m glad I experienced it so now know better.

Flew Business class and did not like anything, flight attendants were rude and not helpful. Food was of poor quality and I did not eat meals.

Traveling to a place near Chicago?

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Everything you need to know for your flight to Chicago

Information on the airport you'll fly into in Chicago