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$357+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$583
(Mytrip)

One-way from

$357
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$625

Good round-trip deal

$1,005 or less

Good one-way deal

$619 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. 9% potential increase in price ($85 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Mytrip deal was found by Cheapflights users on 2/20. 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.
Wed 4/26:25 amLIS - ORD
2 stops19h 30mMultiple Airlines
Wed 4/92:20 pmORD - LIS
2 stops25h 30mMultiple Airlines
Deal found 2/20$583
This lastminute.com deal was found by Cheapflights users on 2/20. 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.
Fri 4/1810:15 pmLIS - ORD
1 stop26h 45mAer Lingus
Sun 5/43:45 pmORD - LIS
1 stop13h 00mAer Lingus
Deal found 2/20$584
This Booking.com deal was found by Cheapflights users on 2/20. 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 4/185:55 pmOPO - ORD
1 stop28h 15mScandinavian Airlines
Thu 5/17:15 pmORD - OPO
1 stop15h 50mScandinavian Airlines
Deal found 2/20$618
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Thu 4/38:40 amOPO - ORD
2 stops28h 54mMultiple Airlines
Tue 4/85:22 pmORD - OPO
2 stops32h 33mMultiple Airlines
Deal found 2/20$628
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
Thu 5/16:35 amLIS - ORD
1 stop13h 40mIberia
Thu 5/224:30 pmORD - LIS
1 stop13h 20mIberia
Deal found 2/20$633
This Booking.com deal was found by Cheapflights users on 2/20. 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 3/2111:05 amLIS - ORD
1 stop14h 01mBritish Airways
Wed 3/264:25 pmORD - LIS
1 stop11h 30mBritish Airways
Deal found 2/20$647
This Iberia deal was found by Cheapflights users on 2/20. 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.
Thu 4/38:15 amOPO - ORD
1 stop12h 00mIberia
Tue 4/84:30 pmORD - OPO
1 stop17h 25mIberia
Deal found 2/20$652
This American Airlines deal was found by Cheapflights users on 2/20. 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 4/1412:20 pmOPO - ORD
1 stop31h 55mAmerican Airlines
Sun 4/274:30 pmORD - OPO
1 stop17h 25mAmerican Airlines
Deal found 2/20$660
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Fri 3/2111:05 amLIS - ORD
2 stops18h 07mAmerican Airlines
Wed 3/2611:57 amORD - LIS
1 stop15h 58mAmerican Airlines
Deal found 2/20$666
This British Airways deal was found by Cheapflights users on 2/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/149:15 pmOPO - ORD
1 stop23h 30mBritish Airways
Sun 4/2710:20 pmORD - OPO
1 stop16h 05mBritish Airways
Deal found 2/20$671
This Trip.com deal was found by Cheapflights users on 2/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/178:15 pmLIS - ORD
1 stop22h 55mITA Airways
Fri 5/233:00 pmORD - LIS
1 stop18h 45mITA Airways
Deal found 2/20$679
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 4/146:00 amOPO - ORD
1 stop12h 55mUnited Airlines
Sun 4/277:10 amORD - OPO
1 stop20h 35mUnited Airlines
Deal found 2/20$712

Find flights from Portugal to Illinois within your budget

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 February 20, 2025.

Fly from

Portugal

Fly to

Illinois

Route

Depart

Return

Price

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 4/2

6:25 am-7:55 pm

2 stops19h 30m

Chicago O'Hare Intl

Wed 4/9

2:20 pm-9:50 pm

2 stops25h 30m

$583

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 4/18

10:15 pm-7:00 pm

1 stop26h 45m

Chicago O'Hare Intl

Sun 5/4

3:45 pm-10:45 am

1 stop13h 00m

$584

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 4/18

5:55 pm-4:10 pm

1 stop28h 15m

Chicago O'Hare Intl

Thu 5/1

7:15 pm-5:05 pm

1 stop15h 50m

$618

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/3

8:40 am-7:34 am

2 stops28h 54m

Chicago O'Hare Intl

Tue 4/8

5:22 pm-7:55 am

2 stops32h 33m

$628

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 5/1

6:35 am-2:15 pm

1 stop13h 40m

Chicago O'Hare Intl

Thu 5/22

4:30 pm-11:50 am

1 stop13h 20m

$633

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 3/21

11:05 am-8:06 pm

1 stop14h 01m

Chicago O'Hare Intl

Wed 3/26

4:25 pm-8:55 am

1 stop11h 30m

$647

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/3

8:15 am-2:15 pm

1 stop12h 00m

Chicago O'Hare Intl

Tue 4/8

4:30 pm-3:55 pm

1 stop17h 25m

$652

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/3

8:15 am-10:28 pm

2 stops20h 13m

Chicago O'Hare Intl

Tue 4/8

4:30 pm-3:55 pm

1 stop17h 25m

$662

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 3/21

11:05 am-12:12 am

2 stops18h 07m

Chicago O'Hare Intl

Wed 3/26

11:57 am-8:55 am

1 stop15h 58m

$666

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 4/14

9:15 pm-2:45 pm

1 stop23h 30m

Chicago O'Hare Intl

Sun 4/27

10:20 pm-8:25 pm

1 stop16h 05m

$671

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Portugal to Illinois

Get recent, data-driven insights about flights from Portugal to Illinois including ideal travel times, pricing trends, and more.

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 February 20, 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 February 20, 2025.
To help decide which airline to fly from Portugal to Illinois, see what other customers have to say about Delta, KLM and Finnair. 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
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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
1,273 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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

Austrian Airlines
7.6
Good
773 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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
1,568 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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 $487 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from $498 and Turkish Airlines from $560 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$562Average$678FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$580Average$1,076FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$716Average$882FlexibilityNo cancel feeOn-time69%
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