$370 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 5/26. 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

Wed, Sep 30 - Sun, Oct 4
Multiple Airlines Logo
6:35 am - 2:25 pm
LIS
-
ORD
13h 50m
1 stop
Multiple Airlines Logo
10:25 pm - 11:00 pm
ORD
-
LIS
42h 35m
2 stops
$697Multiple Airlines
Wed, Sep 30 - Sat, Oct 3
Multiple Airlines Logo
6:35 am - 2:25 pm
LIS
-
ORD
13h 50m
1 stop
Multiple Airlines Logo
4:30 pm - 9:50 pm
ORD
-
LIS
23h 20m
2 stops
$708Multiple Airlines
Sat, May 23 - Fri, May 29
Multiple Airlines Logo
10:55 pm - 4:10 pm
LIS
-
ORD
23h 15m
1 stop
Multiple Airlines Logo
10:15 am - 3:45 pm
ORD
-
LIS
23h 30m
2 stops
$719Multiple Airlines
Tue, Sep 29 - Sat, Oct 3
Multiple Airlines Logo
6:35 am - 2:25 pm
LIS
-
ORD
13h 50m
1 stop
Multiple Airlines Logo
4:30 pm - 9:50 pm
ORD
-
LIS
23h 20m
2 stops
$720Multiple Airlines
Tue, Sep 29 - Fri, Oct 2
Multiple Airlines Logo
6:35 am - 2:25 pm
LIS
-
ORD
13h 50m
1 stop
Multiple Airlines Logo
7:25 pm - 5:35 pm
ORD
-
LIS
16h 10m
2 stops
$726Multiple Airlines
Sat, Jun 27 - Mon, Jun 29
United Airlines Logo
11:25 am - 7:50 am
LIS
-
ORD
26h 25m
1 stop
United Airlines Logo
6:00 am - 10:30 am
ORD
-
LIS
22h 30m
1 stop
$747United Airlines
Fri, May 29 - Tue, Jun 2
Scandinavian Airlines Logo
9:15 pm - 4:10 pm
LIS
-
ORD
24h 55m
1 stop
Scandinavian Airlines Logo
7:00 am - 3:35 pm
ORD
-
LIS
26h 35m
2 stops
$772Scandinavian Airlines
Tue, May 26 - Tue, Jun 2
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
$787Aer Lingus
Tue, Jun 9 - Tue, Jun 16
LOT Logo
2:25 pm - 7:50 pm
OPO
-
ORD
35h 25m
1 stop
LOT Logo
9:50 pm - 1:25 pm
ORD
-
OPO
33h 35m
1 stop
$856LOT
Tue, Jun 9 - Tue, Jun 16
LOT Logo
2:25 pm - 3:10 pm
OPO
-
ORD
30h 45m
2 stops
LOT Logo
9:50 pm - 1:25 pm
ORD
-
OPO
33h 35m
1 stop
$895LOT
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 $697 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 $120 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$370
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 $697 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 $120 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 $794. 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 $1,649
  • 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 9595 reviews
7.3Comfort
7.7Boarding
6.6Food
8.1Crew
7.1Entertainment
Airline reviews

Very comfortable flight, snacks and drinks were good, good communication from crew. Could have used a little more information on timing of boarding for group 5

10.0 ExcellentJim, Apr 2026
BWI - ORD
Read more United Airlines reviews

Very comfortable flight, snacks and drinks were good, good communication from crew. Could have used a little more information on timing of boarding for group 5

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

It was better than excellent. The staff in Mason City were great. The young woman that pushed my wheelchair did more than could be expected of her. She came from India 17 years ago. I don't remember her name.

After arriving in Chicago, we were taxiing for 1.5 hours with infrequent and untruthful updates about the amount of time it would take to arrive at the gate. Minimally, the team could have provided timing expectations that were more truthful, especially one their original expectations were not met.

The crew was generally professional. Though one of the crew members seemed to be easily annoyed, the others were fine and helpful. The green olives and almonds snack was really good. A great idea, and nice balance of tastes.

Every staff member was professional, friendly and courteous. The pizza twist was ok. It was warm but too much dough.

I had a terrible experience. My flight got delayed from Atlanta to Chicago on Monday April 6, 2026, and that led to me missing my next flight to Brussels. United Airlines didn’t provide me with any accommodation for shelter. I had to sleep at the airport in Chicago. The next flight I was put on didn’t leave until the evening hours of Tuesday 4/7/2026.

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!

It poured rain, our luggage was sitting out in it uncovered on the transport cart while our plane was delayed! Nice business class plane for short flight to Lisbon, but more delay & rain in Lisbon, with terrible Business class seat with no entertainment & cold food on longer flight to London…ALL LUGGAGE AND CLOTHES INSIDE THEM WERE SOAKED THROUGH!!! Could only try with hair dryer to get some drying before quick turn round to train trip.

Delayed at the beginning and the end and almost missed our connection

Menzies group staff not very sympathetic good at breaking up families during the boarding process

They left our luggage uncovered on tarmac in pouring rain during an hour delay of departure! At our final destination, we found ALL OF OUR CLOTHES/SHOES soaked all the way through!! Our 1st connection plane was a great business class accommodation but only 50 minutes long. Our 2nd connection from Lisbon (another delay with luggage uncovered on tarmac) had only the extra legroom and mediocre food in business class - no entertainment and no extra comfort seating. Will not use TAP Air Portugal again!

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

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