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$306+ 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
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$394
(oojo)

One-way from

$306
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$750

Good round-trip deal

$757 or less

Good one-way deal

$666 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. 10% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This oojo deal was found by Cheapflights users on 6/12. 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 11/264:55 pmLIS - ORD
1 stop29h 50mScandinavian Airlines
Sun 11/307:20 pmORD - LIS
1 stop14h 45mScandinavian Airlines
Deal found 6/12$394
This Booking.com deal was found by Cheapflights users on 6/11. 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.
Thu 10/29:20 amLIS - ORD
Nonstop9h 15mTAP AIR PORTUGAL
Thu 10/166:00 pmORD - LIS
Nonstop8h 00mTAP AIR PORTUGAL
Deal found 6/11$493
This AirNGo deal was found by Cheapflights users on 6/10. 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.
Fri 10/1010:35 pmOPO - ORD
1 stop23h 55mTAP AIR PORTUGAL
Fri 10/176:00 pmORD - OPO
1 stop24h 40mTAP AIR PORTUGAL
Deal found 6/10$507
This KLM deal was found by Cheapflights users on 6/10. 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 10/27:30 pmLIS - ORD
1 stop24h 40mMultiple Airlines
Thu 11/135:20 pmORD - LIS
1 stop18h 10mMultiple Airlines
Deal found 6/10$512
This Delta deal was found by Cheapflights users on 6/10. 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.
Sat 11/155:00 amLIS - ORD
1 stop15h 30mDelta
Wed 12/31:30 pmORD - LIS
1 stop12h 30mDelta
Deal found 6/10$517
This Air France deal was found by Cheapflights users on 6/10. 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 11/35:30 amLIS - ORD
1 stop15h 40mAir France
Mon 11/105:20 pmORD - LIS
1 stop15h 50mAir France
Deal found 6/10$518
This KLM deal was found by Cheapflights users on 6/11. 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 10/211:40 amLIS - ORD
1 stop32h 30mKLM
Thu 10/164:20 pmORD - LIS
1 stop12h 35mKLM
Deal found 6/11$519
This Delta deal was found by Cheapflights users on 6/11. 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.
Tue 10/75:00 amLIS - MDW
2 stops19h 36mDelta
Mon 10/205:59 pmMDW - LIS
2 stops17h 51mDelta
Deal found 6/11$519
This American Airlines deal was found by Cheapflights users on 6/12. 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 11/248:20 amOPO - ORD
1 stop12h 10mAmerican Airlines
Mon 12/14:45 pmORD - OPO
1 stop17h 15mAmerican Airlines
Deal found 6/12$537
This Gotogate deal was found by Cheapflights users on 6/12. 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.
Mon 6/238:35 pmOPO - ORD
1 stop23h 40mIberia
Tue 7/84:30 pmORD - OPO
1 stop13h 10mIberia
Deal found 6/12$561
This Trip.com deal was found by Cheapflights users on 6/12. 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.
Thu 10/211:25 amLIS - ORD
1 stop13h 35mAer Lingus
Thu 10/169:15 pmORD - LIS
1 stop18h 20mAer Lingus
Deal found 6/12$565
This Iberia deal was found by Cheapflights users on 6/11. 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.
Wed 9/2410:10 pmLIS - ORD
1 stop21h 20mIberia
Fri 10/104:30 pmORD - LIS
1 stop13h 20mIberia
Deal found 6/11$655

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 June 12, 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

Wed 11/26

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Sun 11/30

7:20 pm-4:05 pm

1 stop14h 45m

$394

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 10/2

9:20 am-12:35 pm

Nonstop9h 15m

Chicago O'Hare Intl

Thu 10/16

6:00 pm-8:00 am

Nonstop8h 00m

$493

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/10

10:35 pm-4:30 pm

1 stop23h 55m

Chicago O'Hare Intl

Fri 10/17

6:00 pm-12:40 am

1 stop24h 40m

$507

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 10/2

7:30 pm-2:10 pm

1 stop24h 40m

Chicago O'Hare Intl

Thu 11/13

5:20 pm-5:30 pm

1 stop18h 10m

$512

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sat 11/15

5:00 am-2:30 pm

1 stop15h 30m

Chicago O'Hare Intl

Wed 12/3

1:30 pm-8:00 am

1 stop12h 30m

$517

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Mon 11/3

5:30 am-3:10 pm

1 stop15h 40m

Chicago O'Hare Intl

Mon 11/10

5:20 pm-3:10 pm

1 stop15h 50m

$518

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 10/2

11:40 am-2:10 pm

1 stop32h 30m

Chicago O'Hare Intl

Thu 10/16

4:20 pm-10:55 am

1 stop12h 35m

$519

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Tue 10/7

5:00 am-6:36 pm

2 stops19h 36m

Chicago Midway

Mon 10/20

5:59 pm-5:50 pm

2 stops17h 51m

$519

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

8:20 am-2:30 pm

1 stop12h 10m

Chicago O'Hare Intl

Mon 12/1

4:45 pm-4:00 pm

1 stop17h 15m

$537

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 6/23

8:35 pm-2:15 pm

1 stop23h 40m

Chicago O'Hare Intl

Tue 7/8

4:30 pm-11:40 am

1 stop13h 10m

$561

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 12, 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 June 12, 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
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Transat
7.8
Good
396 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LOT
7.6
Good
1,077 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $548 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Aer Lingus from $555 and Icelandair from $580 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$579Average$713FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$580Average$1,145FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$650Average$696FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$733Average$886FlexibilityNo cancel feeOn-time69%

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