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$319+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Booking.com deal was found by Cheapflights users on 10/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/225:10 pmFAO - ORD
1 stop29h 35mScandinavian Airlines
Fri 11/287:20 pmORD - FAO
1 stop15h 00mScandinavian Airlines
Deal found 10/29$467
This Trip.com deal was found by Cheapflights users on 10/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/145:35 pmOPO - ORD
1 stop29h 10mScandinavian Airlines
Thu 11/277:20 pmORD - OPO
1 stop15h 35mScandinavian Airlines
Deal found 10/28$480
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/264:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Sun 11/307:20 pmORD - LIS
1 stop14h 45mScandinavian Airlines
Deal found 10/30$484
This Trip.com deal was found by Cheapflights users on 10/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Sat 12/67:20 pmORD - LIS
1 stop14h 45mScandinavian Airlines
Deal found 10/29$490
This lol.travel deal was found by Cheapflights users on 10/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:35 pmOPO - ORD
1 stop29h 10mScandinavian Airlines
Sun 12/77:20 pmORD - OPO
1 stop15h 25mScandinavian Airlines
Deal found 10/30$502
This Scandinavian Airlines deal was found by Cheapflights users on 10/27. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/144:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Fri 4/247:15 pmORD - LIS
1 stop14h 20mScandinavian Airlines
Deal found 10/27$557
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:00 pmOPO - ORD
1 stop26h 45mTAP AIR PORTUGAL
Sun 1/188:25 pmORD - OPO
1 stop14h 35mTAP AIR PORTUGAL
Deal found 10/29$569
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/124:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Sun 12/287:20 pmORD - LIS
1 stop14h 45mScandinavian Airlines
Deal found 10/30$591
This Scandinavian Airlines deal was found by Cheapflights users on 10/27. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/174:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Fri 4/247:15 pmORD - LIS
1 stop14h 20mScandinavian Airlines
Deal found 10/27$603
This Booking.com deal was found by Cheapflights users on 10/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/174:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Thu 1/87:20 pmORD - LIS
1 stop14h 30mScandinavian Airlines
Deal found 10/29$604
This Scandinavian Airlines deal was found by Cheapflights users on 10/27. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/144:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Mon 4/207:15 pmORD - LIS
1 stop14h 20mScandinavian Airlines
Deal found 10/27$609
This Rumbo deal was found by Cheapflights users on 10/29. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/264:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Mon 12/87:20 pmORD - LIS
2 stops20h 40mScandinavian Airlines
Deal found 10/29$611

Cheap flight deals from Portugal to Illinois

Keep the following information in mind while searching for Portugal to Illinois flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$467
(Booking.com)

One-way from

$319
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$798

Good one-way deal

$635 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. 10% potential increase in price ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 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

FaroChicago

FAO - ORD

FAOORD

Faro

Sat 11/22

5:10 pm-4:45 pm

1 stop29h 35m

Chicago O'Hare Intl

Fri 11/28

7:20 pm-4:20 pm

1 stop15h 00m

$467

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Tue 4/14

4:25 pm-4:10 pm

1 stop29h 45m

Chicago O'Hare Intl

Mon 4/27

7:15 pm-3:35 pm

1 stop14h 20m

$516

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Tue 4/21

4:25 pm-4:10 pm

1 stop29h 45m

Chicago O'Hare Intl

Fri 5/1

7:15 pm-3:35 pm

1 stop14h 20m

$533

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Mon 4/20

7:15 am-4:10 pm

1 stop14h 55m

Chicago O'Hare Intl

Fri 4/24

7:15 pm-3:35 pm

1 stop14h 20m

$614

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sat 12/13

6:55 pm-4:45 pm

1 stop27h 50m

Chicago O'Hare Intl

Fri 4/24

7:15 pm-3:35 pm

1 stop14h 20m

$615

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 12/17

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Mon 4/20

7:15 pm-3:35 pm

1 stop14h 20m

$656

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sun 12/14

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Sat 4/25

7:15 pm-9:00 am

1 stop31h 45m

$667

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 12/17

9:55 pm-5:55 pm

2 stops26h 00m

Chicago O'Hare Intl

Wed 1/7

9:00 pm-9:15 pm

2 stops18h 15m

$704

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 11/12

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Sat 12/6

7:20 pm-4:05 pm

1 stop14h 45m

$708

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Wed 12/3

10:00 am-3:20 pm

1 stop35h 20m

Chicago Midway

Sat 12/6

2:59 pm-8:55 am

2 stops35h 56m

$748

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
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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 $514). 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 October 30, 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 October 30, 2025.
Read through reviews of airlines operating flights from Portugal to Illinois, such as KLM, United Airlines, and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,406 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
8,998 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
American Airlines
7.2
Good
11,035 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Aer Lingus
7.2
Good
1,365 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
TAP AIR PORTUGAL
7.1
Good
2,040 reviews
KLM
7.7
Good
1,406 reviews

Boarding

7.8

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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, Lufthansa, and Delta can get you from Portugal to Illinois in just under 13h 35m. Your travel time can differ by up to 16h. There are 3931 mi between Portugal and Illinois. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $514). 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

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Alternative routes for Portugal to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$579Average$742FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$580Average$1,209FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$650Average$696FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$653Average$740FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$733Average$872FlexibilityNo cancel feeOn-time69%

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