HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$361+ Cheap flights from Portugal to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portugal to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Portugal to Illinois

Cheapest flights from Portugal to Illinois
Explore the most affordable flight options available from Portugal to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Gotogate deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/269:00 amOPO - ORD
1 stop12h 25mTAP AIR PORTUGAL
Wed 1/217:10 pmORD - OPO
1 stop16h 50mTAP AIR PORTUGAL
Deal found 12/16$726
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:55 amOPO - ORD
1 stop12h 05mTAP AIR PORTUGAL
Sun 1/188:25 pmORD - OPO
1 stop10h 35mTAP AIR PORTUGAL
Deal found 12/16$782
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:00 pmOPO - ORD
1 stop25h 00mTAP AIR PORTUGAL
Sun 1/188:25 pmORD - OPO
1 stop15h 40mTAP AIR PORTUGAL
Deal found 12/16$811
This KLM deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:15 amOPO - ORD
1 stop33h 05mMultiple Airlines
Wed 1/211:58 pmORD - OPO
2 stops14h 32mMultiple Airlines
Deal found 12/16$813
This KLM deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:10 pmOPO - ORD
1 stop28h 10mKLM
Wed 1/214:25 pmORD - OPO
1 stop12h 05mKLM
Deal found 12/16$819
This Air France deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 amOPO - ORD
2 stops20h 36mKLM
Tue 1/2010:35 amORD - OPO
2 stops17h 55mKLM
Deal found 12/16$825
This Air France deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:30 amLIS - ORD
1 stop15h 40mAir France
Thu 1/15:20 pmORD - LIS
1 stop18h 10mAir France
Deal found 12/15$832
This American Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:20 amOPO - ORD
1 stop12h 35mAmerican Airlines
Fri 1/236:00 amORD - OPO
2 stops19h 40mAmerican Airlines
Deal found 12/16$841
This American Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:30 amLIS - ORD
1 stop14h 25mAmerican Airlines
Thu 1/13:24 pmORD - LIS
2 stops11h 41mAmerican Airlines
Deal found 12/15$843
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:15 amLIS - ORD
1 stop12h 55mUnited Airlines
Fri 1/26:21 pmORD - LIS
1 stop9h 54mUnited Airlines
Deal found 12/17$844
This American Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:25 pmOPO - ORD
2 stops33h 00mAmerican Airlines
Sun 1/1811:51 amORD - OPO
2 stops22h 09mAmerican Airlines
Deal found 12/16$846
This Air Canada deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2611:20 amLIS - ORD
2 stops37h 33mAir Canada
Thu 1/17:15 amORD - LIS
1 stop20h 05mAir Canada
Deal found 12/16$847

Find flight deals from Portugal to Illinois

Keep the following information in mind while searching for Portugal to Illinois flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$440
(Mytrip)

One-way from

$361
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$767

Good round-trip deal

$529 or less

Good one-way deal

$542 or less
Provider with most accurate pricing for Lisbon Humberto Delgado-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Chicago (CHI) flights.
Search Deals
From Portugal to Illinois
Search Deals
One-way flight from Portugal to Illinois
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Portugal to Illinois.
Search Deals
Price to beat on a one-way flight from Portugal to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portugal to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Portugal to Illinois that are best for you.

Fly from

Portugal

Fly to

Illinois

Route

Depart

Return

Price

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 1/30

4:40 pm-4:45 pm

1 stop30h 05m

Chicago O'Hare Intl

Sun 2/15

7:10 pm-4:05 pm

1 stop14h 55m

$459

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 2/18

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Sun 2/22

7:10 pm-4:30 pm

1 stop15h 20m

$519

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sat 2/21

7:05 am-4:45 pm

1 stop15h 40m

Chicago O'Hare Intl

Sun 3/1

7:20 pm-4:30 pm

1 stop15h 10m

$557

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sat 1/31

6:15 pm-4:55 pm

2 stops28h 40m

Chicago O'Hare Intl

Sat 2/7

7:20 pm-4:05 pm

1 stop14h 45m

$564

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Tue 2/17

12:50 pm-4:45 pm

1 stop33h 55m

Chicago O'Hare Intl

Sun 2/22

7:10 pm-4:30 pm

1 stop15h 20m

$578

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 1/30

6:55 am-9:35 pm

2 stops20h 40m

Chicago O'Hare Intl

Sun 2/15

7:10 pm-4:05 pm

1 stop14h 55m

$596

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Tue 2/17

12:50 pm-4:45 pm

1 stop33h 55m

Chicago O'Hare Intl

Sat 2/21

7:20 pm-5:10 pm

1 stop15h 50m

$596

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 1/15

1:00 pm-4:45 pm

2 stops33h 45m

Chicago O'Hare Intl

Wed 1/28

7:20 pm-9:15 pm

2 stops19h 55m

$612

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 2/12

1:00 pm-4:45 pm

1 stop33h 45m

Chicago O'Hare Intl

Sun 2/22

7:10 pm-4:30 pm

1 stop15h 20m

$620

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 2/20

6:55 am-9:57 pm

2 stops21h 02m

Chicago O'Hare Intl

Sun 2/22

7:10 pm-5:55 pm

2 stops40h 45m

$632

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 53 results
1
2
3
...
6

Best time to book a flight from Portugal to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Portugal with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portugal to Illinois

What is the cheapest month to book a flight from Portugal to Illinois?

Currently, November is the cheapest month in which you can book a flight from Portugal to Illinois (average of $517). Flying from Portugal to Illinois in February is currently the most expensive (average of $900). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PT to IL?

Find hourly flight availability from Portugal to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Portugal to Illinois in the evening. If you’re flexible enough to do this you can expect to save up to 46% on your trip compared to booking a flight in the afternoon.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated December 18, 2025.
Read through reviews of airlines operating flights from Portugal to Illinois, such as Delta, KLM, and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,005 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,005 reviews
Delta
7.9
Good
8,005 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.7
Good
1,428 reviews
Delta
7.9
Good
8,005 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,055 reviews
Delta
7.9
Good
8,005 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Aer Lingus
7.2
Good
1,395 reviews
Delta
7.9
Good
8,005 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
TAP AIR PORTUGAL
7.2
Good
2,091 reviews
Delta
7.9
Good
8,005 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Portugal to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portugal to Illinois?

    Scandinavian Airlines, KLM, and Delta can get you from Portugal to Illinois in just under 18h 37m. Your travel time can differ by up to 11h 28m. There are 3994 mi between Portugal and Illinois. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Portugal to Illinois one-way?

    One-way options have recently been found by users for as low as $401 on Finnair. Other airlines that offer cheap prices include Iberia from $484 and American Airlines from $484 one-way.

  • Can I find deals for flights from Portugal to Illinois that include hotel bookings?

    Yes. In addition to deals on Portugal to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portugal to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to Illinois.

  • Can I find deals for business class flights from Portugal to Illinois?

    Yes. Cheapflights offers flight deals from Portugal to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portugal to Illinois?

    Currently, November is the cheapest month in which you can book a flight from Portugal to Illinois (average of $517). Flying from Portugal to Illinois in February is currently the most expensive (average of $900). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portugal to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Charles de Gaulle to John F Kennedy Intl flights
Charles de Gaulle to Newark flights
Orly to Newark flights
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Frankfurt to Newark flights
Frankfurt to John F Kennedy Intl flights
Charles de Gaulle to LaGuardia flights
Orly to John F Kennedy Intl flights
Charles de Gaulle to Miami flights
Heathrow to LaGuardia flights
Gatwick to John F Kennedy Intl flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Bruxelles-National to Newark flights
Charles de Gaulle to Los Angeles flights
Bruxelles-National to John F Kennedy Intl flights
Frankfurt to LaGuardia flights
Stansted to John F Kennedy Intl flights
Gatwick to LaGuardia flights
Malpensa to Newark flights
Madrid to Newark flights
Frankfurt to Miami flights
Madrid to John F Kennedy Intl flights
Barcelona-El Prat to Newark flights
London City to Newark flights
Luton to John F Kennedy Intl flights
Berlin to Newark flights
Leonardo da Vinci/Fiumicino to Newark flights
Barcelona-El Prat to John F Kennedy Intl flights
Vienna to Newark flights
Frankfurt to Los Angeles flights
Stansted to Newark flights
Leonardo da Vinci/Fiumicino to John F Kennedy Intl flights
Luton to Newark flights
Frederic Chopin to John F Kennedy Intl flights
Vienna to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Munich to Newark flights
Duesseldorf Intl to Newark flights
Heathrow to Miami flights
Beauvais-Tille to Newark flights
Frederic Chopin to Newark flights
Zurich to John F Kennedy Intl flights
Madrid to Miami flights
Munich to John F Kennedy Intl flights
Amsterdam to Newark flights
Bruxelles-National to LaGuardia flights
Orly to Los Angeles flights

Top 5 airlines flying from Portugal to Illinois

Discover the top 5 airlines that operate flights from Portugal to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$650Average$696FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$653Average$740FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$665Average$1,209FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$669Average$775FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$760Average$898FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.