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$339+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ORD
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
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 julio 31, 2025.

Round-trip from

$542
(lol.travel)

One-way from

$339
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$986

Good round-trip deal

$823 or less

Good one-way deal

$638 or less
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. 12% potential increase in price ($117 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 July 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 julio 31, 2025.

This lol.travel deal was found by Cheapflights users on 7/30. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/189:15 pmOPO - ORD
1 stop25h 15mTAP AIR PORTUGAL
jue. 10/26:00 pmORD - OPO
1 stop17h 00mTAP AIR PORTUGAL
Deal found 7/30$542
This Scandinavian Airlines deal was found by Cheapflights users on 7/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/294:55 pmLIS - ORD
1 stop30h 50mScandinavian Airlines
dom. 11/27:20 pmORD - LIS
1 stop14h 45mScandinavian Airlines
Deal found 7/30$564
This Booking.com deal was found by Cheapflights users on 7/31. 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.
mié. 9/1010:15 pmLIS - ORD
1 stop21h 45mAer Lingus
sáb. 9/209:15 pmORD - LIS
1 stop18h 20mAer Lingus
Deal found 7/31$567
This oojo deal was found by Cheapflights users on 7/30. 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.
dom. 10/264:55 pmLIS - ORD
1 stop30h 00mMultiple Airlines
dom. 11/27:20 pmORD - LIS
1 stop14h 20mMultiple Airlines
Deal found 7/30$580
This Expedia deal was found by Cheapflights users on 7/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/2811:45 amFAO - ORD
1 stop13h 15mAer Lingus
mar. 9/29:15 pmORD - FAO
1 stop15h 45mAer Lingus
Deal found 7/30$643
This Mytrip deal was found by Cheapflights users on 7/31. 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.
jue. 9/1112:50 pmOPO - ORD
2 stops33h 20mMultiple Airlines
jue. 9/256:00 pmORD - OPO
2 stops22h 05mMultiple Airlines
Deal found 7/31$657
This KLM deal was found by Cheapflights users on 7/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/288:30 amFAO - ORD
1 stop35h 40mKLM
mar. 9/24:15 pmORD - FAO
1 stop33h 25mKLM
Deal found 7/30$659
This Delta deal was found by Cheapflights users on 7/31. 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.
mar. 10/75:00 amLIS - ORD
1 stop15h 10mDelta
lun. 10/276:20 pmORD - LIS
1 stop12h 00mDelta
Deal found 7/31$660
This Delta deal was found by Cheapflights users on 7/31. 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.
mar. 10/75:00 amLIS - MDW
2 stops19h 25mDelta
lun. 10/276:23 pmMDW - LIS
2 stops18h 07mDelta
Deal found 7/31$666
This American Airlines deal was found by Cheapflights users on 7/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/2511:05 amLIS - ORD
2 stops14h 27mAmerican Airlines
dom. 9/710:35 pmORD - LIS
1 stop18h 30mAmerican Airlines
Deal found 7/31$673
This KLM deal was found by Cheapflights users on 7/31. 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.
mié. 8/274:20 pmOPO - ORD
1 stop27h 50mKLM
vie. 9/265:10 pmORD - OPO
1 stop21h 25mKLM
Deal found 7/31$675
This Delta deal was found by Cheapflights users on 7/30. 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 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. 10/26:28 pmORD - OPO
2 stops15h 02mDelta
Deal found 7/30$677

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 julio 31, 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

dom. 1/18

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

dom. 2/15

7:10 pm-4:05 pm

1 stop14h 55m

$441

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

9:15 pm-4:30 pm

1 stop25h 15m

Chicago O'Hare Intl

jue. 10/2

6:00 pm-5:00 pm

1 stop17h 00m

$542

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

mié. 9/10

10:15 pm-2:00 pm

1 stop21h 45m

Chicago O'Hare Intl

sáb. 9/20

9:15 pm-9:35 pm

1 stop18h 20m

$567

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

dom. 10/26

4:55 pm-5:55 pm

1 stop30h 00m

Chicago O'Hare Intl

dom. 11/2

7:20 pm-3:40 pm

1 stop14h 20m

$580

FaroChicago

FAO - ORD

FAOORD

Faro

jue. 8/28

11:45 am-7:00 pm

1 stop13h 15m

Chicago O'Hare Intl

mar. 9/2

9:15 pm-7:00 pm

1 stop15h 45m

$643

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/11

12:50 pm-4:10 pm

2 stops33h 20m

Chicago O'Hare Intl

jue. 9/25

10:27 am-10:05 pm

3 stops29h 38m

$657

FaroChicago

FAO - ORD

FAOORD

Faro

jue. 8/28

8:30 am-2:10 pm

1 stop35h 40m

Chicago O'Hare Intl

mar. 9/2

4:15 pm-7:40 am

1 stop33h 25m

$659

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

mar. 10/7

5:00 am-6:25 pm

2 stops19h 25m

Chicago Midway

lun. 10/27

6:23 pm-5:30 pm

2 stops18h 07m

$666

PortoChicago

OPO - ORD

OPOORD

Porto

mié. 8/27

4:20 pm-2:10 pm

1 stop27h 50m

Chicago O'Hare Intl

vie. 9/26

5:10 pm-8:35 pm

1 stop21h 25m

$675

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

jue. 10/2

6:28 pm-3:30 pm

2 stops15h 02m

$677

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 43 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 julio 31, 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.

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 julio 31, 2025.
Read through reviews of airlines operating flights from Portugal to Illinois, such as Delta, KLM, and Air France. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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 $469 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from $569 and Turkish Airlines from $616 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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$497Average$1,145FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$579Average$713FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$650Average$696FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$733Average$872FlexibilityNo cancel feeOn-time69%

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