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$309+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
abr. 22 — abr. 291
mar. 4/22
mar. 4/29
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 abril 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$672
(Delta)

One-way from

$309
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$839

Good one-way deal

$620 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. 11% potential increase in price ($103 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 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 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 abril 17, 2025.

This lastminute.com deal was found by Cheapflights users on 4/17. 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.
vie. 11/144:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
mar. 11/257:00 amORD - LIS
2 stops26h 40mScandinavian Airlines
Deal found 4/17$631
This Gotogate deal was found by Cheapflights users on 4/17. 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.
jue. 9/188:15 pmLIS - ORD
1 stop22h 55mITA Airways
lun. 9/293:00 pmORD - LIS
1 stop33h 55mITA Airways
Deal found 4/17$671
This Delta deal was found by Cheapflights users on 4/16. 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.
jue. 5/85:00 amLIS - ORD
1 stop15h 10mDelta
mié. 5/1410:31 amORD - LIS
2 stops16h 19mDelta
Deal found 4/16$672
This KLM deal was found by Cheapflights users on 4/16. 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.
mié. 9/38:00 pmFAO - ORD
1 stop24h 10mKLM
sáb. 9/134:20 pmORD - FAO
1 stop33h 00mKLM
Deal found 4/16$672
This KLM deal was found by Cheapflights users on 4/17. 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.
jue. 9/1810:25 amLIS - ORD
1 stop33h 45mKLM
sáb. 9/272:00 pmORD - LIS
1 stop12h 00mKLM
Deal found 4/17$679
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
jue. 5/17:25 amFAO - ORD
1 stop17h 35mMultiple Airlines
lun. 5/59:15 pmORD - FAO
1 stop17h 45mMultiple Airlines
Deal found 4/16$684
This Iberia deal was found by Cheapflights users on 4/17. 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.
jue. 5/228:15 amOPO - ORD
1 stop12h 00mMultiple Airlines
jue. 6/55:00 pmORD - OPO
1 stop21h 20mMultiple Airlines
Deal found 4/17$685
This Delta deal was found by Cheapflights users on 4/17. 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.
jue. 9/186:30 amOPO - ORD
1 stop13h 40mDelta
jue. 9/2510:10 amORD - OPO
2 stops16h 15mDelta
Deal found 4/17$690
This KLM deal was found by Cheapflights users on 4/17. 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.
jue. 9/186:30 amOPO - ORD
1 stop13h 40mKLM
jue. 9/254:20 pmORD - OPO
1 stop23h 55mKLM
Deal found 4/17$695
This Expedia deal was found by Cheapflights users on 4/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/67:20 amLIS - ORD
1 stop14h 35mBritish Airways
dom. 6/227:15 pmORD - LIS
1 stop21h 50mBritish Airways
Deal found 4/17$699
This Mytrip deal was found by Cheapflights users on 4/17. 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.
sáb. 5/36:15 amOPO - ORD
2 stops32h 35mAir Canada
dom. 5/119:35 amORD - OPO
2 stops26h 40mAir Canada
Deal found 4/17$702
This British Airways deal was found by Cheapflights users on 4/16. 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.
jue. 5/17:40 pmFAO - ORD
2 stops26h 03mBritish Airways
lun. 5/57:15 pmORD - FAO
1 stop13h 30mBritish Airways
Deal found 4/16$710

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 abril 17, 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

jue. 5/8

5:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

mié. 5/14

10:31 am-8:50 am

2 stops16h 19m

$672

FaroChicago

FAO - ORD

FAOORD

Faro

mié. 9/3

8:50 am-2:10 pm

1 stop35h 20m

Chicago O'Hare Intl

vie. 9/12

4:20 pm-9:05 pm

1 stop22h 45m

$672

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

vie. 5/23

5:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

vie. 5/30

4:20 pm-10:50 pm

1 stop24h 30m

$683

FaroChicago

FAO - ORD

FAOORD

Faro

jue. 5/1

7:25 am-7:00 pm

1 stop17h 35m

Chicago O'Hare Intl

lun. 5/5

9:15 pm-9:00 pm

1 stop17h 45m

$684

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 5/22

8:15 am-2:15 pm

1 stop12h 00m

Chicago O'Hare Intl

jue. 6/5

5:00 pm-8:20 pm

1 stop21h 20m

$685

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

jue. 9/25

10:10 am-8:25 am

2 stops16h 15m

$690

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

jue. 9/25

4:20 pm-10:15 pm

1 stop23h 55m

$695

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

vie. 6/6

7:20 am-3:55 pm

1 stop14h 35m

Chicago O'Hare Intl

dom. 6/22

7:15 pm-11:05 pm

1 stop21h 50m

$699

PortoChicago

OPO - ORD

OPOORD

Porto

sáb. 5/3

6:15 am-8:50 am

2 stops32h 35m

Chicago O'Hare Intl

dom. 5/11

9:35 am-6:15 pm

2 stops26h 40m

$702

FaroChicago

FAO - ORD

FAOORD

Faro

jue. 5/1

7:40 pm-3:43 pm

2 stops26h 03m

Chicago O'Hare Intl

lun. 5/5

7:15 pm-2:45 pm

1 stop13h 30m

$710

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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 abril 17, 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 abril 17, 2025.
To help decide which airline to fly from Portugal to Illinois, see what other customers have to say about Delta, KLM and Air Transat. 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
7,917 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

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
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

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
1,329 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

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
Air Transat
7.8
Good
385 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

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
7,917 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

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
1,269 reviews
Delta
8.0
Very good
7,917 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

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 $527 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from $544 and Turkish Airlines from $604 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 4 airlines flying from Portugal to Illinois

Discover the top 4 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 abril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$579Average$713FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$580Average$1,005FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$650Average$696FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$716Average$798FlexibilityNo cancel feeOn-time69%

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