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$308+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
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 April 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$636
(Gotogate)

One-way from

$308
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$867

Good round-trip deal

$795 or less

Good one-way deal

$596 or less
Provider with most accurate pricing for Lisbon Humberto Delgado-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Chicago (CHI) flights.
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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. 10% potential increase in price ($95 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 April 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 April 1, 2025.

This Gotogate deal was found by Cheapflights users on 3/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/311:25 amLIS - ORD
1 stop13h 35mAer Lingus
Sat 5/179:15 pmORD - LIS
1 stop18h 20mAer Lingus
Deal found 3/31$636
This Air France deal was found by Cheapflights users on 3/31. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/77:30 pmLIS - ORD
1 stop25h 10mMultiple Airlines
Mon 4/145:10 pmORD - LIS
1 stop15h 40mMultiple Airlines
Deal found 3/31$644
This Delta deal was found by Cheapflights users on 4/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/95:00 amLIS - ORD
1 stop15h 40mDelta
Wed 4/236:15 pmORD - LIS
2 stops14h 35mDelta
Deal found 4/1$646
This KLM deal was found by Cheapflights users on 3/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2911:40 amLIS - ORD
1 stop33h 00mKLM
Thu 5/84:20 pmORD - LIS
1 stop16h 15mKLM
Deal found 3/31$649
This Delta deal was found by Cheapflights users on 3/31. 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.
Wed 4/95:00 amLIS - MDW
2 stops19h 02mDelta
Wed 4/235:59 pmMDW - LIS
2 stops14h 51mDelta
Deal found 3/31$653
This Priceline deal was found by Cheapflights users on 4/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/168:15 amOPO - ORD
1 stop12h 00mMultiple Airlines
Tue 4/229:15 pmORD - OPO
1 stop16h 15mMultiple Airlines
Deal found 4/1$657
This Delta deal was found by Cheapflights users on 4/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/166:20 amOPO - ORD
1 stop14h 20mDelta
Tue 4/226:15 pmORD - OPO
2 stops15h 15mDelta
Deal found 4/1$660
This KLM deal was found by Cheapflights users on 4/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/18:20 pmOPO - ORD
1 stop23h 50mKLM
Tue 5/65:10 pmORD - OPO
1 stop16h 20mKLM
Deal found 4/1$661
This Air France deal was found by Cheapflights users on 3/31. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/305:40 amLIS - ORD
2 stops15h 00mAir France
Tue 5/65:10 pmORD - LIS
1 stop12h 05mAir France
Deal found 3/31$662
This Iberia deal was found by Cheapflights users on 3/31. 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.
Sat 4/267:10 amLIS - ORD
1 stop14h 45mBritish Airways
Sat 5/37:10 pmORD - LIS
1 stop15h 05mBritish Airways
Deal found 3/31$671
This Virgin Atlantic deal was found by Cheapflights users on 3/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1212:45 pmLIS - ORD
2 stops17h 13mVirgin Atlantic
Fri 6/610:31 amORD - LIS
2 stops18h 29mVirgin Atlantic
Deal found 3/30$672
This American Airlines deal was found by Cheapflights users on 4/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:35 amLIS - ORD
1 stop13h 40mAmerican Airlines
Mon 5/54:30 pmORD - LIS
1 stop13h 20mAmerican Airlines
Deal found 4/1$680

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 April 1, 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

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sat 5/3

11:25 am-7:00 pm

1 stop13h 35m

Chicago O'Hare Intl

Sat 5/17

9:15 pm-9:35 pm

1 stop18h 20m

$636

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Tue 4/29

3:35 pm-2:40 pm

1 stop29h 05m

Chicago O'Hare Intl

Tue 5/6

5:10 pm-11:15 am

1 stop12h 05m

$644

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 4/17

5:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Tue 4/22

6:15 pm-5:50 pm

2 stops17h 35m

$646

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Tue 4/29

11:40 am-2:40 pm

1 stop33h 00m

Chicago O'Hare Intl

Thu 5/8

4:20 pm-2:35 pm

1 stop16h 15m

$649

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Tue 4/29

5:00 am-6:20 pm

2 stops19h 20m

Chicago Midway

Tue 5/6

3:02 pm-2:50 pm

2 stops17h 48m

$653

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 4/16

8:15 am-2:15 pm

1 stop12h 00m

Chicago O'Hare Intl

Tue 4/22

9:15 pm-7:30 pm

1 stop16h 15m

$657

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 4/16

6:20 am-2:40 pm

1 stop14h 20m

Chicago O'Hare Intl

Tue 4/22

6:15 pm-3:30 pm

2 stops15h 15m

$660

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 5/1

8:20 pm-2:10 pm

1 stop23h 50m

Chicago O'Hare Intl

Tue 5/6

5:10 pm-3:30 pm

1 stop16h 20m

$661

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 4/30

5:40 am-2:40 pm

2 stops15h 00m

Chicago O'Hare Intl

Tue 5/6

5:10 pm-11:15 am

1 stop12h 05m

$662

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sat 4/26

7:10 am-3:55 pm

1 stop14h 45m

Chicago O'Hare Intl

Sat 5/3

7:10 pm-4:15 pm

1 stop15h 05m

$671

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

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 April 1, 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 1, 2025.
To help decide which airline to fly from Portugal to Illinois, see what other customers have to say about Delta, KLM and LOT. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,898 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,898 reviews
Delta
8.0
Very good
7,898 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,898 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
LOT
7.6
Good
1,065 reviews
Delta
8.0
Very good
7,898 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,898 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,572 reviews
Delta
8.0
Very good
7,898 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    One-way options have recently been found by users for as low as $506 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from $537 and Turkish Airlines from $579 one-way.

  • 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 3 airlines flying from Portugal to Illinois

Discover the top 3 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 April 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$579Average$713FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$580Average$1,005FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$716Average$838FlexibilityNo cancel feeOn-time69%

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