HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$237+ Cheap flights from Illinois to Portugal

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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LIS
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Portugal 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 Illinois to Portugal

Keep the following information in mind while searching for Illinois to Portugal flight deals. Data was last updated July 31, 2025.

Round-trip from

$466
(oojo)

One-way from

$237
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$886

Good round-trip deal

$399 or less

Good one-way deal

$279 or less
From Illinois to Portugal
Search Deals
One-way flight from Illinois to Portugal
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($150 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 July 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Portugal.
Search Deals
Price to beat on a one-way flight from Illinois to Portugal.
Search Deals

Find flight deals from Illinois to Portugal

Cheapest flights from Illinois to Portugal
Explore the most affordable flight options available from Illinois to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Booking.com deal was found by Cheapflights users on 7/31. 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.
Sun 11/27:20 pmORD - FAO
1 stop32h 40mScandinavian Airlines
Sat 11/155:10 pmFAO - ORD
1 stop29h 35mScandinavian Airlines
Deal found 7/31$450
This FlightHub deal was found by Cheapflights users on 7/29. 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.
Tue 9/237:50 pmORD - LIS
1 stop37h 25mTurkish Airlines
Wed 10/155:55 amLIS - ORD
1 stop33h 45mTurkish Airlines
Deal found 7/29$565
This Iberia deal was found by Cheapflights users on 7/31. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1510:30 pmORD - LIS
1 stop27h 15mIberia
Wed 10/226:35 amLIS - ORD
2 stops19h 10mIberia
Deal found 7/31$567
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:10 pmORD - LIS
1 stop33h 50mDelta
Sun 11/165:30 amLIS - ORD
1 stop15h 40mDelta
Deal found 7/31$568
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/221:08 pmMDW - LIS
2 stops15h 37mDelta
Fri 10/315:30 amLIS - MDW
2 stops21h 44mDelta
Deal found 7/30$568
This FlightHub deal was found by Cheapflights users on 7/31. 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.
Tue 10/1410:30 pmORD - LIS
1 stop17h 35mLufthansa
Sat 11/85:00 amLIS - ORD
2 stops19h 26mLufthansa
Deal found 7/31$569
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2010:40 amORD - LIS
1 stop16h 40mUnited Airlines
Thu 9/1111:25 amLIS - ORD
2 stops29h 10mUnited Airlines
Deal found 7/29$570
This Ovago deal was found by Cheapflights users on 7/31. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/179:45 pmORD - LIS
1 stop13h 55mBritish Airways
Thu 1/1510:55 amLIS - ORD
1 stop15h 10mBritish Airways
Deal found 7/31$571
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Mon 9/224:30 pmORD - LIS
1 stop11h 50mMultiple Airlines
Wed 10/17:05 amLIS - ORD
1 stop13h 10mMultiple Airlines
Deal found 7/31$572
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:10 pmORD - LIS
Nonstop7h 55mTAP AIR PORTUGAL
Thu 9/259:20 amLIS - ORD
Nonstop9h 15mTAP AIR PORTUGAL
Deal found 7/29$577
This Priceline deal was found by Cheapflights users on 7/31. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/171:56 pmORD - LIS
2 stops13h 24mAir Canada
Thu 9/1811:25 amLIS - ORD
2 stops14h 04mAir Canada
Deal found 7/31$588
This Booking.com deal was found by Cheapflights users on 7/31. 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.
Mon 8/116:10 pmORD - FAO
1 stop23h 40mTAP AIR PORTUGAL
Wed 8/276:10 pmFAO - ORD
1 stop24h 40mTAP AIR PORTUGAL
Deal found 7/31$590

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Portugal 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 July 31, 2025.
Use the filters below to find and compare flights from Illinois to Portugal that are best for you.

Fly from

Illinois

Fly to

Portugal

Route

Depart

Return

Price

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Mon 10/6

7:15 pm-2:20 pm

1 stop13h 05m

Faro

Wed 10/15

10:45 am-4:10 pm

2 stops35h 25m

$466

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 9/23

7:50 pm-3:15 pm

1 stop37h 25m

Lisbon Humberto Delgado

Wed 10/15

5:55 am-9:40 am

1 stop33h 45m

$565

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 10/15

10:30 pm-7:45 am

1 stop27h 15m

Lisbon Humberto Delgado

Wed 10/22

6:35 am-7:45 pm

2 stops19h 10m

$567

ChicagoLisbon

MDW - LIS

MDWLIS

Chicago Midway

Wed 10/22

1:08 pm-10:45 am

2 stops15h 37m

Lisbon Humberto Delgado

Fri 10/31

5:30 am-10:14 pm

2 stops21h 44m

$568

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 10/14

10:30 pm-10:05 pm

1 stop17h 35m

Lisbon Humberto Delgado

Sat 11/8

5:00 am-6:26 pm

2 stops19h 26m

$569

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 8/20

10:40 am-9:20 am

1 stop16h 40m

Lisbon Humberto Delgado

Thu 9/11

11:25 am-10:35 am

2 stops29h 10m

$570

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Mon 9/22

4:30 pm-10:20 am

1 stop11h 50m

Lisbon Humberto Delgado

Wed 10/1

7:05 am-2:15 pm

1 stop13h 10m

$572

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Mon 9/15

6:10 pm-8:05 am

Nonstop7h 55m

Lisbon Humberto Delgado

Thu 9/25

9:20 am-12:35 pm

Nonstop9h 15m

$577

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Sat 1/3

6:35 pm-9:20 am

2 stops32h 45m

Lisbon Humberto Delgado

Fri 1/16

11:20 am-12:20 pm

2 stops31h 00m

$583

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 8/17

1:56 pm-9:20 am

2 stops13h 24m

Lisbon Humberto Delgado

Thu 9/18

11:25 am-7:29 pm

2 stops14h 04m

$588

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Illinois to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Illinois 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 Illinois to Portugal

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Portugal (average of $612). Flying from Illinois to Portugal in June is currently the most expensive (average of $1,129). 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 IL to PT?

Find hourly flight availability from Illinois to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Portugal as you normally would.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated July 31, 2025.
Get a feel of what it's like to fly with Delta, KLM, and Air France from Illinois to Portugal by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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

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

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $263. Users have also found prices from $286 and $289 on Aer Lingus and American Airlines, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Portugal 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 Illinois to Portugal?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Portugal (average of $612). Flying from Illinois to Portugal in June is currently the most expensive (average of $1,129). 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 Illinois to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Charles de Gaulle flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to London City flights
Newark to Charles de Gaulle flights
Newark to Leonardo da Vinci/Fiumicino flights
Newark to Gatwick flights
LaGuardia to Heathrow flights
John F Kennedy Intl to Istanbul flights
John F Kennedy Intl to Lisbon flights
Newark to London City flights
John F Kennedy Intl to Stansted flights
LaGuardia to Gatwick flights
Miami to Madrid flights
John F Kennedy Intl to Orly flights
Newark to Lisbon flights
Boston to Heathrow flights
O'Hare Intl to Heathrow flights
Newark to Athens flights
John F Kennedy Intl to Luton flights
Dulles Intl to Heathrow flights
Newark to Barcelona-El Prat flights
Los Angeles to Heathrow flights
Newark to Orly flights
Newark to Stansted flights
LaGuardia to Charles de Gaulle flights
John F Kennedy Intl to Athens flights
John F Kennedy Intl to Malpensa flights
John F Kennedy Intl to Dublin flights
Newark to Madrid flights
John F Kennedy Intl to Barcelona-El Prat flights
John F Kennedy Intl to Madrid flights
LaGuardia to Leonardo da Vinci/Fiumicino flights
San Francisco to Heathrow flights
Newark to Malpensa flights
Seattle to Heathrow flights
Newark to Dublin flights
Boston to Charles de Gaulle flights
Baltimore to Heathrow flights
Boston to Leonardo da Vinci/Fiumicino flights
Seattle to Charles de Gaulle flights
John F Kennedy Intl to Frederic Chopin flights
Newark to Luton flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
O'Hare Intl to Charles de Gaulle flights
Dallas/Fort Worth to Heathrow flights
John F Kennedy Intl to Frankfurt flights
John F Kennedy Intl to Amsterdam flights

Top 10 airlines flying from Illinois to Portugal

Discover the top 10 airlines that operate flights from Illinois to Portugal. 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$415Average$817FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$436Average$561FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$445Average$771FlexibilityNo cancel feeOn-time77%
FinnairCheapest$463Average$731FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$468Average$747FlexibilityNo cancel feeOn-time71%
IberiaCheapest$473Average$780FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$702FlexibilityNo cancel feeOn-time72%
DeltaCheapest$498Average$734FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$504Average$1,071FlexibilityNo cancel feeOn-time70%
SWISSCheapest$517Average$732FlexibilityNo cancel feeOn-time79%

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.