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$249+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LIS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$410
(lol.travel)

One-way from

$249
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$747

Good round-trip deal

$510 or less

Good one-way deal

$263 or less
From Illinois to Portugal
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One-way flight from Illinois to Portugal
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Highest demand for flights based on searches. 16% potential increase in price ($150 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 Illinois to Portugal.
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Price to beat on a one-way flight from Illinois to Portugal.
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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 September 15, 2025.

This lol.travel 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2712:45 pmORD - OPO
2 stops15h 45mUnited Airlines
Wed 11/1212:35 pmOPO - ORD
1 stop13h 32mUnited Airlines
Deal found 9/14$410
This lastminute.com deal was found by Cheapflights users on 9/13. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2712:50 pmORD - OPO
2 stops18h 15mMultiple Airlines
Wed 11/1212:10 pmOPO - ORD
1 stop34h 10mMultiple Airlines
Deal found 9/13$413
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:50 pmORD - OPO
1 stop19h 50mMultiple Airlines
Wed 11/57:20 pmOPO - ORD
1 stop27h 00mMultiple Airlines
Deal found 9/14$425
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/275:45 pmORD - OPO
1 stop17h 15mAmerican Airlines
Wed 11/128:20 amOPO - ORD
1 stop12h 10mAmerican Airlines
Deal found 9/15$446
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/264:20 pmORD - OPO
1 stop11h 10mUnited Airlines
Tue 12/26:00 amOPO - ORD
1 stop13h 10mUnited Airlines
Deal found 9/14$450
This oojo deal was found by Cheapflights users on 9/13. 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.
Tue 11/256:50 pmORD - OPO
1 stop34h 25mSWISS
Tue 12/212:05 pmOPO - ORD
1 stop34h 15mSWISS
Deal found 9/13$453
This lol.travel 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/299:10 pmORD - OPO
2 stops31h 20mUnited Airlines
Wed 11/512:35 pmOPO - ORD
1 stop25h 07mUnited Airlines
Deal found 9/14$454
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Sun 11/165:31 pmORD - OPO
1 stop9h 59mUnited Airlines
Thu 11/276:00 amOPO - ORD
1 stop13h 10mUnited Airlines
Deal found 9/13$458
This KAYAK deal was found by Cheapflights users on 9/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/166:50 pmORD - OPO
1 stop34h 25mSWISS
Mon 11/2412:05 pmOPO - ORD
1 stop34h 15mSWISS
Deal found 9/13$459
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2610:47 amMDW - OPO
2 stops17h 43mDelta
Tue 12/26:05 amOPO - MDW
2 stops17h 55mDelta
Deal found 9/15$479
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/271:48 pmMDW - OPO
2 stops15h 42mKLM
Wed 11/126:00 amOPO - MDW
2 stops18h 18mKLM
Deal found 9/14$484
This Scandinavian Airlines 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:20 pmORD - FAO
2 stops32h 25mScandinavian Airlines
Sat 11/225:10 pmFAO - ORD
1 stop29h 35mScandinavian Airlines
Deal found 9/14$507

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 September 15, 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

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 10/27

3:07 pm-9:30 am

1 stop13h 23m

Porto

Wed 11/12

12:35 pm-11:43 pm

2 stops17h 08m

$436

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/26

2:30 pm-9:30 am

1 stop13h 00m

Porto

Tue 12/2

6:00 am-1:10 pm

1 stop13h 10m

$450

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/17

5:31 pm-9:30 am

1 stop9h 59m

Porto

Wed 11/26

12:30 pm-8:05 pm

1 stop13h 35m

$458

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/17

4:20 pm-9:30 am

1 stop11h 10m

Porto

Thu 11/27

6:00 am-8:05 pm

1 stop20h 05m

$458

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/17

3:07 pm-9:30 am

1 stop12h 23m

Porto

Tue 11/25

6:00 am-1:10 pm

1 stop13h 10m

$458

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/16

5:31 pm-9:30 am

1 stop9h 59m

Porto

Thu 11/27

6:00 am-1:10 pm

1 stop13h 10m

$458

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 11/26

10:47 am-10:30 am

2 stops17h 43m

Porto

Tue 12/2

6:05 am-6:00 pm

2 stops17h 55m

$479

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Mon 10/27

1:48 pm-10:30 am

2 stops15h 42m

Porto

Wed 11/12

6:00 am-6:18 pm

2 stops18h 18m

$484

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Mon 11/10

7:20 pm-9:45 am

2 stops32h 25m

Faro

Sat 11/22

5:10 pm-4:45 pm

1 stop29h 35m

$507

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Fri 11/14

7:20 pm-10:05 am

2 stops32h 45m

Faro

Tue 11/25

10:50 am-4:45 pm

1 stop35h 55m

$507

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 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 $1,127). 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 September 15, 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.

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.

  • How long is the flight from Illinois to Portugal?

    United Airlines, Delta, and KLM can get you from Illinois to Portugal in just under 13h 23m. Your travel time can differ by up to 4h 20m. There are 3931 mi between Illinois and Portugal. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $264. Users have also found prices from $434 and $508 on Delta and United 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 $1,127). 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 Illinois to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$369Average$478FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$444Average$564FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$453Average$824FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$472Average$748FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$484Average$888FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$490Average$702FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$504Average$1,044FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$510Average$727FlexibilityNo cancel feeOn-time71%
SWISSCheapest$517Average$748FlexibilityNo cancel feeOn-time79%
KLMCheapest$525Average$657FlexibilityNo cancel feeOn-time75%

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