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Portugal

$260+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LIS
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
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 November 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$424
(oojo)

One-way from

$260
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$647

Good round-trip deal

$405 or less

Good one-way deal

$276 or less
Provider with most accurate pricing for Chicago (CHI)-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Lisbon Humberto Delgado flights.
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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. 17% potential increase in price ($154 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 November 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 November 2, 2025.

This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/148:15 pmORD - OPO
1 stop14h 45mTAP AIR PORTUGAL
Tue 11/188:00 pmOPO - ORD
1 stop25h 00mTAP AIR PORTUGAL
Deal found 10/30$424
This oojo deal was found by Cheapflights users on 11/1. 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.
Wed 12/37:10 pmORD - OPO
1 stop13h 55mTAP AIR PORTUGAL
Sun 12/148:55 amOPO - ORD
1 stop11h 50mTAP AIR PORTUGAL
Deal found 11/1$425
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.
Wed 11/127:10 pmORD - OPO
1 stop11h 55mTAP AIR PORTUGAL
Tue 11/186:00 pmOPO - ORD
1 stop27h 00mTAP AIR PORTUGAL
Deal found 10/29$431
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/129:50 pmORD - OPO
1 stop19h 50mLufthansa
Fri 11/2112:30 pmOPO - ORD
1 stop13h 35mLufthansa
Deal found 10/29$435
This FlightHub deal was found by Cheapflights users on 11/1. 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.
Wed 11/127:10 pmORD - OPO
1 stop11h 55mTAP AIR PORTUGAL
Wed 11/198:55 amOPO - ORD
1 stop12h 05mTAP AIR PORTUGAL
Deal found 11/1$440
This Mytrip deal was found by Cheapflights users on 10/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:20 pmORD - FNC
1 stop14h 00mScandinavian Airlines
Sat 12/64:10 pmFNC - ORD
1 stop30h 35mScandinavian Airlines
Deal found 10/31$447
This AirNGo 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:25 pmORD - OPO
1 stop31h 35mTAP AIR PORTUGAL
Sun 11/238:55 amOPO - ORD
1 stop11h 50mTAP AIR PORTUGAL
Deal found 10/30$453
This Kiwi.com deal was found by Cheapflights users on 11/1. 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.
Sun 11/98:25 pmORD - OPO
1 stop10h 35mTAP AIR PORTUGAL
Fri 11/219:00 amOPO - ORD
1 stop12h 25mTAP AIR PORTUGAL
Deal found 11/1$466
This Booking.com deal was found by Cheapflights users on 10/31. 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.
Fri 11/287:20 pmORD - FAO
1 stop15h 00mScandinavian Airlines
Sat 12/135:10 pmFAO - ORD
1 stop29h 35mScandinavian Airlines
Deal found 10/31$468
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:20 pmORD - FNC
1 stop14h 00mScandinavian Airlines
Sat 12/134:10 pmFNC - ORD
1 stop30h 35mScandinavian Airlines
Deal found 10/30$470
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/148:15 pmORD - OPO
1 stop31h 35mTAP AIR PORTUGAL
Fri 11/219:00 amOPO - ORD
1 stop12h 25mTAP AIR PORTUGAL
Deal found 10/29$471
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:31 pmORD - OPO
1 stop9h 59mUnited Airlines
Thu 11/206:00 amOPO - ORD
1 stop15h 20mUnited Airlines
Deal found 10/29$474

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 November 2, 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

Fri 11/14

8:15 pm-5:00 pm

1 stop14h 45m

Porto

Tue 11/18

8:00 pm-3:00 pm

1 stop25h 00m

$424

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

7:10 pm-6:00 pm

1 stop16h 50m

Porto

Wed 11/19

8:55 am-3:00 pm

1 stop12h 05m

$431

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

5:31 pm-9:30 am

1 stop9h 59m

Porto

Thu 11/20

6:00 am-3:20 pm

1 stop15h 20m

$474

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

1:00 pm-9:30 am

2 stops14h 30m

Porto

Fri 11/21

6:00 am-8:05 pm

1 stop20h 05m

$478

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 12/31

1:37 pm-10:15 am

2 stops14h 38m

Lisbon Humberto Delgado

Fri 1/16

5:00 am-3:20 pm

1 stop16h 20m

$487

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 12/31

1:35 pm-11:20 am

2 stops15h 45m

Lisbon Humberto Delgado

Tue 1/13

11:25 am-2:20 pm

1 stop32h 55m

$490

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Mon 12/1

2:35 pm-3:10 pm

2 stops18h 35m

Lisbon Humberto Delgado

Fri 12/12

5:00 am-2:20 pm

1 stop15h 20m

$490

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

2:35 pm-10:30 am

2 stops13h 55m

Porto

Wed 11/19

6:00 am-7:23 pm

2 stops19h 23m

$492

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 11/12

1:47 pm-10:30 am

2 stops14h 43m

Porto

Wed 11/19

11:15 am-11:40 pm

2 stops18h 25m

$492

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Wed 1/14

7:10 pm-3:45 pm

1 stop14h 35m

Faro

Thu 3/12

4:35 pm-4:25 pm

1 stop28h 50m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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, December is the cheapest month in which you can book a flight from Illinois to Portugal (average of $411). Flying from Illinois to Portugal in June is currently the most expensive (average of $695). 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 November 2, 2025.

One of the essential ways to save on airfare from Illinois to Portugal is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 14% on airfare.

What is the cheapest day to fly from Illinois to Portugal?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Portugal. Price data was last updated on November 3, 2024.

Travelers seeking maximum savings on their Illinois to Portugal flight should consider departing on Wednesday evenings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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?

    TAP AIR PORTUGAL, United Airlines, and Delta can get you from Illinois to Portugal in just under 9h 59m. Your travel time can differ by up to 5h 46m. 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 Lufthansa. According to our data, you can fly for as low as $395. Users have also found prices from $401 and $403 on TAP AIR PORTUGAL and Air Canada, 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, December is the cheapest month in which you can book a flight from Illinois to Portugal (average of $411). Flying from Illinois to Portugal in June is currently the most expensive (average of $695). 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 November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$369Average$478FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$425Average$561FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$441Average$708FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$464Average$822FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$470Average$662FlexibilityNo cancel feeOn-time77%
IberiaCheapest$487Average$754FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$640FlexibilityNo cancel feeOn-time72%
SWISSCheapest$496Average$721FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$497Average$892FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$504Average$1,076FlexibilityNo cancel feeOn-time70%

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