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$300+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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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 septiembre 16, 2025.

Round-trip from

$390
(lol.travel)

One-way from

$300
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$732

Good round-trip deal

$674 or less

Good one-way deal

$649 or less
From Portugal to Illinois
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One-way flight from Portugal to Illinois
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Highest demand for flights based on searches. 11% potential increase in price ($97 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Portugal to Illinois.
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Price to beat on a one-way flight from Portugal to Illinois.
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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 septiembre 16, 2025.

This lol.travel deal was found by Cheapflights users on 9/15. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/75:35 pmOPO - ORD
1 stop29h 10mScandinavian Airlines
dom. 11/237:20 pmORD - OPO
1 stop15h 25mScandinavian Airlines
Deal found 9/15$390
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/264:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
dom. 11/307:20 pmORD - LIS
1 stop14h 45mScandinavian Airlines
Deal found 9/15$421
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/155:10 pmFAO - ORD
1 stop29h 35mScandinavian Airlines
dom. 11/237:20 pmORD - FAO
1 stop32h 40mScandinavian Airlines
Deal found 9/15$421
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/155:10 pmFAO - ORD
1 stop29h 35mScandinavian Airlines
vie. 11/217:20 pmORD - FAO
1 stop15h 00mScandinavian Airlines
Deal found 9/15$438
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/155:10 pmFAO - ORD
1 stop29h 35mScandinavian Airlines
mié. 11/197:20 pmORD - FAO
2 stops57h 50mScandinavian Airlines
Deal found 9/15$447
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/54:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
dom. 11/237:20 pmORD - LIS
1 stop15h 10mScandinavian Airlines
Deal found 9/15$449
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/264:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
jue. 12/117:20 pmORD - LIS
1 stop14h 45mScandinavian Airlines
Deal found 9/14$455
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/155:10 pmFAO - ORD
1 stop29h 35mScandinavian Airlines
jue. 11/207:20 pmORD - FAO
2 stops33h 50mScandinavian Airlines
Deal found 9/15$482
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/156:55 pmFAO - ORD
2 stops27h 50mScandinavian Airlines
lun. 11/247:20 pmORD - FAO
2 stops32h 25mScandinavian Airlines
Deal found 9/15$489
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/54:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
vie. 11/217:20 pmORD - LIS
1 stop31h 35mScandinavian Airlines
Deal found 9/15$508
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1210:35 amFAO - ORD
2 stops36h 10mScandinavian Airlines
dom. 11/237:20 pmORD - FAO
1 stop32h 40mScandinavian Airlines
Deal found 9/15$517
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/711:30 amOPO - ORD
2 stops35h 15mMultiple Airlines
dom. 11/237:20 pmORD - OPO
3 stops29h 30mMultiple Airlines
Deal found 9/16$526

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 septiembre 16, 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

PortoChicago

OPO - ORD

OPOORD

Porto

vie. 11/7

5:35 pm-4:45 pm

1 stop29h 10m

Chicago O'Hare Intl

dom. 11/23

7:20 pm-4:45 pm

1 stop15h 25m

$390

FaroChicago

FAO - ORD

FAOORD

Faro

sáb. 11/15

5:10 pm-4:45 pm

1 stop29h 35m

Chicago O'Hare Intl

dom. 11/23

7:20 pm-10:00 am

1 stop32h 40m

$421

FaroChicago

FAO - ORD

FAOORD

Faro

sáb. 11/15

5:10 pm-4:45 pm

1 stop29h 35m

Chicago O'Hare Intl

lun. 11/24

7:20 pm-9:45 am

2 stops32h 25m

$429

FaroChicago

FAO - ORD

FAOORD

Faro

sáb. 11/15

5:10 pm-4:45 pm

1 stop29h 35m

Chicago O'Hare Intl

vie. 11/21

7:20 pm-4:20 pm

1 stop15h 00m

$438

FaroChicago

FAO - ORD

FAOORD

Faro

sáb. 11/15

5:10 pm-4:45 pm

1 stop29h 35m

Chicago O'Hare Intl

mié. 11/19

7:20 pm-11:10 am

2 stops57h 50m

$447

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

mié. 12/24

7:00 pm-4:45 pm

1 stop27h 45m

Chicago O'Hare Intl

jue. 1/15

7:20 pm-3:50 pm

1 stop14h 30m

$508

FaroChicago

FAO - ORD

FAOORD

Faro

mié. 11/12

10:35 am-4:45 pm

2 stops36h 10m

Chicago O'Hare Intl

lun. 11/24

7:20 pm-9:45 am

2 stops32h 25m

$524

PortoChicago

OPO - ORD

OPOORD

Porto

vie. 11/7

11:30 am-4:45 pm

2 stops35h 15m

Chicago O'Hare Intl

dom. 11/23

7:20 pm-6:50 am

3 stops29h 30m

$526

FaroChicago

FAO - ORD

FAOORD

Faro

mié. 11/12

10:35 am-4:45 pm

2 stops36h 10m

Chicago O'Hare Intl

vie. 11/21

7:20 pm-4:20 pm

1 stop15h 00m

$535

PortoChicago

OPO - ORD

OPOORD

Porto

mar. 10/21

9:15 pm-4:10 pm

1 stop24h 55m

Chicago O'Hare Intl

vie. 10/31

9:15 pm-10:00 pm

1 stop19h 45m

$560

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, August is the cheapest month in which you can book a flight from Portugal to Illinois (average of $245). Flying from Portugal to Illinois in March is currently the most expensive (average of $321). 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 septiembre 16, 2025.

When flying from Portugal to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 septiembre 16, 2025.
Read through reviews of airlines operating flights from Portugal to Illinois, such as Delta, 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.
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
United Airlines
7.4
Good
8,924 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Aer Lingus
7.2
Good
1,274 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
TAP AIR PORTUGAL
7.1
Good
1,975 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

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, Delta, and American Airlines can get you from Portugal to Illinois in just under 19h 03m. Your travel time can differ by up to 10h 07m. There are 4212 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, August is the cheapest month in which you can book a flight from Portugal to Illinois (average of $245). Flying from Portugal to Illinois in March is currently the most expensive (average of $321). 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 4 airlines flying from Portugal to Illinois

Discover the top 4 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 septiembre 16, 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
United AirlinesCheapest$716Average$872FlexibilityNo cancel feeOn-time69%

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