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$339+ Cheap flights from Portugal to Chicago (CHI)

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 — CHI
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
1 adult, Economy
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Cheap flight deals from Portugal to Chicago

Keep the following information in mind while searching for Portugal to Chicago flight deals. Data was last updated August 2, 2025.

Round-trip from

$441
(Scandinavian Airlines)

One-way from

$339
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$1,014

Good round-trip deal

$823 or less

Good one-way deal

$638 or less
From Portugal to Chicago (CHI)
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One-way flight from Portugal to Chicago (CHI)
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Highest demand for flights based on searches. 12% potential increase in price ($114 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Portugal to Chicago (CHI).
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Price to beat on a one-way flight from Portugal to Chicago (CHI).
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Find flight deals from Portugal to Chicago

Cheapest flights from Portugal to Chicago
Explore the most affordable flight options available from Portugal to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2025.

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.
Wed 9/1010:15 pmLIS - ORD
1 stop21h 45mAer Lingus
Sat 9/209:15 pmORD - LIS
1 stop18h 20mAer Lingus
Deal found 7/31$567
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.
Sun 9/145:55 amLIS - ORD
1 stop19h 05mMultiple Airlines
Sun 9/219:15 pmORD - LIS
1 stop18h 45mMultiple Airlines
Deal found 7/31$597
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:05 pmOPO - ORD
1 stop28h 05mTAP AIR PORTUGAL
Thu 9/256:00 pmORD - OPO
1 stop18h 55mTAP AIR PORTUGAL
Deal found 7/31$600
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.
Thu 9/1112:50 pmOPO - ORD
2 stops33h 20mMultiple Airlines
Thu 9/2510:27 amORD - OPO
3 stops29h 38mMultiple Airlines
Deal found 7/31$657
This Delta deal was found by Cheapflights users on 8/1. 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.
Mon 9/155:00 amLIS - ORD
1 stop15h 40mDelta
Sun 9/286:50 pmORD - LIS
2 stops17h 50mDelta
Deal found 8/1$662
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.
Tue 10/75:00 amLIS - MDW
2 stops19h 25mDelta
Mon 10/276:23 pmMDW - LIS
2 stops18h 07mDelta
Deal found 7/31$666
This KLM deal was found by Cheapflights users on 8/2. 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.
Mon 11/246:30 amOPO - ORD
1 stop13h 50mKLM
Mon 12/15:20 pmORD - OPO
1 stop11h 10mKLM
Deal found 8/2$673
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.
Mon 8/2511:05 amLIS - ORD
2 stops14h 27mAmerican Airlines
Sun 9/710:35 pmORD - LIS
1 stop18h 30mAmerican Airlines
Deal found 7/31$673
This Delta deal was found by Cheapflights users on 8/1. 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.
Mon 11/246:30 amOPO - ORD
2 stops21h 32mDelta
Mon 12/15:20 pmORD - OPO
1 stop11h 10mDelta
Deal found 8/1$676
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.
Fri 10/107:30 pmLIS - ORD
1 stop24h 40mKLM
Fri 10/174:15 pmORD - LIS
1 stop16h 20mKLM
Deal found 7/31$676
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Fri 10/108:15 amOPO - ORD
2 stops19h 04mAmerican Airlines
Fri 10/174:30 pmORD - OPO
1 stop21h 25mAmerican Airlines
Deal found 8/1$690
This United Airlines deal was found by Cheapflights users on 8/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/411:20 amLIS - ORD
1 stop26h 40mUnited Airlines
Wed 11/53:07 pmORD - LIS
1 stop11h 03mUnited Airlines
Deal found 8/1$703

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portugal to Chicago 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 August 2, 2025.
Use the filters below to find and compare flights from Portugal to Chicago that are best for you.

Fly from

Portugal

Fly to

Chicago

Route

Depart

Return

Price

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sun 1/18

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Sun 2/15

7:10 pm-4:05 pm

1 stop14h 55m

$441

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 9/10

10:15 pm-2:00 pm

1 stop21h 45m

Chicago O'Hare Intl

Sat 9/20

9:15 pm-9:35 pm

1 stop18h 20m

$567

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Mon 1/19

6:45 am-4:45 pm

1 stop16h 00m

Chicago O'Hare Intl

Mon 2/16

7:20 pm-9:50 pm

2 stops44h 30m

$580

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/11

6:05 pm-4:10 pm

1 stop28h 05m

Chicago O'Hare Intl

Thu 9/25

6:00 pm-6:55 pm

1 stop18h 55m

$600

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 8/28

5:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Tue 9/2

10:15 am-9:00 am

2 stops16h 45m

$656

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/11

12:50 pm-4:10 pm

2 stops33h 20m

Chicago O'Hare Intl

Thu 9/25

10:27 am-10:05 pm

3 stops29h 38m

$657

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Tue 10/7

5:00 am-6:25 pm

2 stops19h 25m

Chicago Midway

Mon 10/27

6:23 pm-5:30 pm

2 stops18h 07m

$666

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Mon 12/1

5:20 pm-10:30 am

1 stop11h 10m

$673

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Mon 8/25

11:05 am-7:32 pm

2 stops14h 27m

Chicago O'Hare Intl

Sun 9/7

10:35 pm-11:05 pm

1 stop18h 30m

$673

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

6:30 am-10:02 pm

2 stops21h 32m

Chicago O'Hare Intl

Mon 12/1

5:20 pm-10:30 am

1 stop11h 10m

$676

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 30 results
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Best time to book a flight from Portugal to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago 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 Chicago

What is the cheapest month to book a flight from Portugal to Chicago?

Currently, August is the cheapest month in which you can book a flight from Portugal to Chicago (average of $245). Flying from Portugal to Chicago 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 CHI?

Find hourly flight availability from Portugal to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 2, 2025.

It’s optimal to fly from Portugal to Chicago at noon. By choosing this option you can save up to 17% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated August 2, 2025.
Read reviews from past customers who have flown Delta, KLM, and SWISS from Portugal to Chicago. 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
7,983 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
1,384 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
7,983 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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
8,904 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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.
Turkish Airlines
7.3
Good
3,935 reviews
Delta
8.0
Very good
7,983 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

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 Chicago. 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 Chicago one-way?

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $469. Aer Lingus flights start at $570 while deals on Turkish Airlines start at $616 one-way.

  • What are the most popular routes from Portugal to Chicago?

    Most travelers choose Lisbon Humberto Delgado - Chicago O'Hare Intl, Lisbon Humberto Delgado - Chicago Midway or Porto - Chicago O'Hare Intl when deciding on the best route from Portugal to Chicago.

  • What are the cheapest flights from Portugal to Chicago?

    While on average a flight from Portugal to Chicago is generally $1,964, our data shows the cheapest flight currently is $552. When looking at the most popular route, (Lisbon Humberto Delgado - Chicago O'Hare Intl), you can expect to pay $446 for that flight.

  • Can I find deals for flights from Portugal to Chicago that include hotel bookings?

    Yes. In addition to deals on Portugal to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portugal to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to Chicago.

  • Can I find deals for business class flights from Portugal to Chicago?

    Yes. Cheapflights offers flight deals from Portugal to Chicago 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 Chicago?

    Currently, August is the cheapest month in which you can book a flight from Portugal to Chicago (average of $245). Flying from Portugal to Chicago 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

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
Lansing
Hammond
Benton Harbor
Porter
Valparaiso
Chesterton

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Alternative routes for Portugal to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
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Amsterdam to O'Hare Intl flights
Barcelona-El Prat to Midway flights
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Bruxelles-National to Midway flights
Rzeszow to O'Hare Intl flights
Stansted to O'Hare Intl flights
Frankfurt-Hahn to O'Hare Intl flights
Linate to O'Hare Intl flights
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Berlin to O'Hare Intl flights
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Munich to Midway flights
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Amsterdam to Midway flights
Madrid to Midway flights
Leonardo da Vinci/Fiumicino to O'Hare Intl flights
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Manchester to O'Hare Intl flights

Top 4 airlines flying from Portugal to Chicago

Discover the top 4 airlines that operate flights from Portugal to Chicago. 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 August 2, 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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