$370 Find Cheap Flights from Portugal to Chicago - 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 to Chicago departing on 10/20. 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

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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, Nov 18 - Wed, Dec 2
Scandinavian Airlines Logo
4:55 pm - 4:45 pmLIS  Lisbon Humberto Delgado-ORD Chicago O'Hare Intl
29h 50m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
7:15 pm - 4:05 pmORD  Chicago O'Hare Intl-LIS Lisbon Humberto Delgado
14h 50m1 stop Kastrup Copenhagen
$601Scandinavian Airlines
Wed, Sep 16 - Fri, Sep 25
Scandinavian Airlines Logo
8:15 pm - 4:10 pmLIS  Lisbon Humberto Delgado-ORD Chicago O'Hare Intl
25h 55m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
7:15 pm - 10:05 pmORD  Chicago O'Hare Intl-LIS Lisbon Humberto Delgado
20h 50m1 stop Kastrup Copenhagen
$606Scandinavian Airlines
Wed, Sep 9 - Tue, Sep 15
Scandinavian Airlines Logo
8:15 pm - 4:10 pmLIS  Lisbon Humberto Delgado-ORD Chicago O'Hare Intl
25h 55m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
7:15 pm - 7:25 pmORD  Chicago O'Hare Intl-LIS Lisbon Humberto Delgado
18h 10m1 stop Kastrup Copenhagen
$606Scandinavian Airlines
Wed, Sep 9 - Tue, Sep 15
Scandinavian Airlines Logo
8:15 pm - 4:10 pmLIS  Lisbon Humberto Delgado-ORD Chicago O'Hare Intl
25h 55m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
7:15 pm - 7:25 pmORD  Chicago O'Hare Intl-LIS Lisbon Humberto Delgado
18h 10m1 stop Kastrup Copenhagen
$624Scandinavian Airlines
Tue, Sep 8 - Fri, Sep 18
Aer Lingus Logo
10:15 pm - 2:00 pmLIS  Lisbon Humberto Delgado-ORD Chicago O'Hare Intl
21h 45m1 stop Dublin
Aer Lingus Logo
9:00 pm - 9:35 pmORD  Chicago O'Hare Intl-LIS Lisbon Humberto Delgado
18h 35m1 stop Dublin
$634Aer Lingus
Wed, Sep 9 - Sat, Sep 19
Aer Lingus Logo
10:15 pm - 2:00 pmLIS  Lisbon Humberto Delgado-ORD Chicago O'Hare Intl
21h 45m1 stop Dublin
Aer Lingus Logo
3:45 pm - 10:15 amORD  Chicago O'Hare Intl-LIS Lisbon Humberto Delgado
12h 30m1 stop Dublin
$634Aer Lingus
Fri, Oct 30 - Wed, Nov 4
Scandinavian Airlines Logo
5:45 pm - 5:45 pmOPO  Porto-ORD Chicago O'Hare Intl
29h 00m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
7:15 pm - 5:00 pmORD  Chicago O'Hare Intl-OPO Porto
15h 45m1 stop Kastrup Copenhagen
$635Scandinavian Airlines
Wed, Dec 23 - Thu, Dec 31
Scandinavian Airlines Logo
4:55 pm - 4:45 pmLIS  Lisbon Humberto Delgado-ORD Chicago O'Hare Intl
29h 50m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
7:15 pm - 4:05 pmORD  Chicago O'Hare Intl-LIS Lisbon Humberto Delgado
14h 50m1 stop Kastrup Copenhagen
$639Scandinavian Airlines
Thu, Sep 17 - Wed, Sep 30
TAP AIR PORTUGAL Logo
6:00 pm - 4:00 pmOPO  Porto-ORD Chicago O'Hare Intl
28h 00m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
6:00 pm - 7:00 pmORD  Chicago O'Hare Intl-OPO Porto
19h 00m1 stop Lisbon Humberto Delgado
$739TAP AIR PORTUGAL
Thu, Sep 17 - Wed, Sep 30
TAP AIR PORTUGAL Logo
10:30 pm - 4:00 pmOPO  Porto-ORD Chicago O'Hare Intl
23h 30m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
6:00 pm - 11:10 pmORD  Chicago O'Hare Intl-OPO Porto
23h 10m1 stop Lisbon Humberto Delgado
$743TAP AIR PORTUGAL
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 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 Friday where round-trip tickets can be as cheap as $983. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $1,111 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 round-trip 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 January and July, where the average cost of tickets from Portugal is $1,137 and $1,083 respectively. For one-way flights, the best month to travel is January with an average price of $587.

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 $933 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 $1,045.

What is a good deal for flights to Chicago O'Hare Intl Airport?

If you’re looking for cheap airfare to Chicago O'Hare Intl Airport, 25% of our users found tickets to Chicago O'Hare Intl Airport for the following prices or less: From Lisbon $983 round-trip.

Good to know

Low season

November

Cheapest flight

$370
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Lisbon to Chicago

FAQs - booking Chicago flights

  • 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 $1,059. The cheapest price found on KAYAK in the last 2 weeks cost $579 and departed from Lisbon Humberto Delgado Airport.

  • 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.

  • How many direct flights to Chicago O'Hare Intl Airport are there each week?

    Each week there are around 33,040 direct flights from within Portugal to Chicago O'Hare Intl Airport. The most common day for departures is Sunday, with 17% of flights taking off on this day.

Top tips for finding cheap flights to Chicago

  • Looking for cheap airfare to Chicago? 25% of our users found round-trip tickets to Chicago for the following prices or less: From Lisbon $1,608
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Chicago flight deals.

Reviews of the top airline 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.
7.2
TAP AIR PORTUGALOverall score based on 2368 reviews
7.8Crew
6.4Entertainment
6.3Food
7.1Comfort
7.0Boarding
Airline reviews

The flight was excellent because I chose to upgrade to Business Class. The only negative drawback was because I upgrade, it screwed their system up and they lost my luggage for 2 days, but it was then recovered.

8.0 ExcellentAnonymous, Aug 2026
Read more TAP AIR PORTUGAL reviews

The flight was excellent because I chose to upgrade to Business Class. The only negative drawback was because I upgrade, it screwed their system up and they lost my luggage for 2 days, but it was then recovered.

Web site needs improvement Plane was clean and modern Lay Flat beds were hard and not to comfortable (business class )

Overall, everything was fine—the service, the food, and the entertainment—but the boarding process in Lisbon was a total mess. I’m not sure I’d fly with TAP again. It’s absurd to have to pay for good seats at the front of the plane only to board last; the overhead bins above your seat are likely already full thanks to passengers who boarded earlier—even though they might be seated at the back of the plane. I will think very carefully before flying with TAP Portugal again; it seems to me that they need to review their boarding process. I understand the logic of filling the plane from back to front, but the seats at the front are more expensive. Horacio Rodriguez

Boarding was delayed by one hour because cleaning and catering crews did not board the plane in time. Take off was delayed for another 40 minutes because of "rush hour scheduling". Vague descriptiion. My in-flight entertainment system was stuck initializing. The flight attendant indicated that they could not reset it without resetting everyone's system. Overall, a miserable experience.

Better leg room than expected in economy. Nice crew. Adequate bathrooms. Seat cushions a little thin, but recline well and have adjustable headrests. Best value. Liked having nonstop from ORD to Lisbon.

Excellent! Flight left a bit late but overall a pleasant experience.

On both flights, TAP Air Portugal messed up the seating choices that I paid for. They acknowledged that I had purchased seating, that they were errant in ensuring my choices, but told me nothing could be done about it. When I asked to be refunded, I was directed to "talk to someone from Air Portugal" Mon-Friday, and then I was dismissed. No help, no phone number provided to me. I was very annoyed both times and feel cheated.

Business class seats aren't comfortable. Food was not good.

Didn't make announcements during boarding, flight attendant seemed annoyed when I asked for water. Too many hours between flights. Confusing check in at the Lisbon airport.

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

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Gurnee
Merrillville
South Haven
Oak Brook
Saint Joseph
Tinley Park
Hammond
Elk Grove Village
Des Plaines
Hoffman Estates
Portage
South Holland
Willowbrook
Oakbrook Terrace
Lansing
Delavan
Alsip
Northbrook
Lisle
Elmhurst

Everything you need to know for your flight to Chicago

Information on the airport you'll fly into in Chicago