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$217+ Cheap flights from Chicago (CHI) to Portugal

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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LIS
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap flight deals from Chicago to Portugal

Keep the following information in mind while searching for Chicago to Portugal flight deals. Data was last updated November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$425
(oojo)

One-way from

$217
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$645

Good round-trip deal

$408 or less

Good one-way deal

$321 or less
Provider with most accurate pricing for Chicago (CHI)-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Lisbon Humberto Delgado flights.
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From Chicago (CHI) to Portugal
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One-way flight from Chicago (CHI) to Portugal
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Highest demand for flights based on searches. 17% potential increase in price ($153 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Chicago (CHI) to Portugal.
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Price to beat on a one-way flight from Chicago (CHI) to Portugal.
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Find flight deals from Chicago to Portugal

Cheapest flights from Chicago to Portugal
Explore the most affordable flight options available from Chicago to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This oojo deal was found by Cheapflights users on 11/6. 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 12/37:10 pmORD - OPO
1 stop17h 50mTAP AIR PORTUGAL
Sun 12/148:55 amOPO - ORD
1 stop11h 50mTAP AIR PORTUGAL
Deal found 11/6$425
This Mytrip deal was found by Cheapflights users on 11/6. 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 11/98:25 pmORD - OPO
1 stop15h 40mTAP AIR PORTUGAL
Sat 11/224:55 pmOPO - ORD
1 stop27h 50mTAP AIR PORTUGAL
Deal found 11/6$437
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Mon 12/86:50 pmORD - OPO
1 stop34h 25mMultiple Airlines
Tue 12/166:00 amOPO - ORD
1 stop13h 10mMultiple Airlines
Deal found 11/4$446
This AirNGo deal was found by Cheapflights users on 11/5. 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.
Sun 11/98:25 pmORD - OPO
1 stop31h 35mTAP AIR PORTUGAL
Sun 11/238:55 amOPO - ORD
1 stop11h 50mTAP AIR PORTUGAL
Deal found 11/5$452
This Mytrip deal was found by Cheapflights users on 11/4. 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.
Tue 12/27:05 amORD - OPO
2 stops22h 10mMultiple Airlines
Wed 12/1012:30 pmOPO - ORD
1 stop13h 35mMultiple Airlines
Deal found 11/4$455
This Mytrip deal was found by Cheapflights users on 11/6. 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 12/312:50 pmORD - OPO
2 stops17h 15mMultiple Airlines
Wed 12/106:00 amOPO - ORD
1 stop20h 05mMultiple Airlines
Deal found 11/6$459
This KLM deal was found by Cheapflights users on 11/4. 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.
Tue 12/25:20 pmORD - OPO
1 stop11h 10mKLM
Wed 12/106:00 amOPO - ORD
1 stop14h 20mKLM
Deal found 11/4$477
This KLM deal was found by Cheapflights users on 11/5. 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.
Tue 11/252:35 pmORD - OPO
2 stops13h 55mKLM
Tue 12/24:10 pmOPO - ORD
1 stop28h 10mKLM
Deal found 11/5$481
This KLM deal was found by Cheapflights users on 11/5. 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.
Wed 11/264:25 pmORD - OPO
1 stop12h 05mKLM
Tue 12/24:10 pmOPO - ORD
1 stop28h 10mKLM
Deal found 11/5$482
This Air Canada deal was found by Cheapflights users on 11/6. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:50 pmORD - OPO
2 stops17h 15mAir Canada
Wed 12/106:00 amOPO - ORD
2 stops34h 02mAir Canada
Deal found 11/6$483
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/3012:09 pmORD - LIS
2 stops16h 06mUnited Airlines
Thu 1/155:00 amLIS - ORD
1 stop16h 20mUnited Airlines
Deal found 11/4$486
This FlightHub deal was found by Cheapflights users on 11/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:15 pmORD - LIS
1 stop30h 40mMultiple Airlines
Mon 1/193:25 pmLIS - ORD
1 stop30h 55mMultiple Airlines
Deal found 11/4$487

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Portugal 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 November 6, 2025.
Use the filters below to find and compare flights from Chicago to Portugal that are best for you.

Fly from

Chicago

Fly to

Portugal

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 2/2

5:20 pm-10:30 am

1 stop11h 10m

Porto

Thu 2/12

11:15 am-2:20 pm

1 stop33h 05m

$477

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 12/2

5:20 pm-10:30 am

1 stop11h 10m

Porto

Wed 12/10

6:00 am-2:20 pm

1 stop14h 20m

$477

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 2/1

5:20 pm-10:30 am

1 stop11h 10m

Porto

Fri 2/13

6:30 am-2:20 pm

1 stop13h 50m

$477

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 11/25

2:35 pm-10:30 am

2 stops13h 55m

Porto

Tue 12/2

4:10 pm-2:20 pm

1 stop28h 10m

$481

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 2/1

10:24 am-10:30 am

2 stops18h 06m

Porto

Tue 2/10

11:15 am-2:20 pm

1 stop33h 05m

$481

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 2/2

10:45 am-10:30 am

2 stops17h 45m

Porto

Tue 2/10

11:15 am-2:20 pm

1 stop33h 05m

$481

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/26

4:25 pm-7:20 pm

1 stop20h 55m

Porto

Tue 12/2

4:10 pm-2:20 pm

1 stop28h 10m

$482

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 12/3

1:46 pm-10:15 am

2 stops14h 29m

Lisbon Humberto Delgado

Wed 12/10

5:00 am-1:10 pm

1 stop14h 10m

$486

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 12/9

5:20 pm-10:30 am

1 stop11h 10m

Porto

Tue 12/16

6:05 am-5:46 pm

2 stops17h 41m

$487

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 12/8

5:20 pm-10:30 am

1 stop11h 10m

Porto

Tue 12/16

6:05 am-5:46 pm

2 stops17h 41m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 60 results
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Best time to book a flight from Chicago to Portugal

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

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

Currently, December is the cheapest month in which you can book a flight from Chicago to Portugal (average of $411). Flying from Chicago to Portugal in June is currently the most expensive (average of $695). 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 CHI to PT?

Find hourly flight availability from Chicago to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

It’s typically best to fly out from Chicago to Portugal in the afternoon. Doing so could potentially save you 1% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Chicago to Portugal?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago to Portugal flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated November 6, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and Air Canada from Chicago to Portugal. 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.
United Airlines
7.4
Good
9,003 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,003 reviews
United Airlines
7.4
Good
9,003 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,040 reviews
United Airlines
7.4
Good
9,003 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,412 reviews
United Airlines
7.4
Good
9,003 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
TAP AIR PORTUGAL
7.1
Good
2,046 reviews
United Airlines
7.4
Good
9,003 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
British Airways
6.7
Okay
7,499 reviews
United Airlines
7.4
Good
9,003 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from Chicago to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago to Portugal?

    For as low as $477, Delta can have you in Portugal from Chicago in 11h 10m. There are 3931 mi between Chicago and Portugal. This flight may include one or multiple stops.

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

    The most popular route from Chicago to Portugal is Chicago O'Hare Intl - Lisbon Humberto Delgado. You may also consider Chicago Midway - Lisbon Humberto Delgado or Chicago O'Hare Intl - Porto.

  • What are the cheapest flights from Chicago to Portugal?

    On average you can expect to pay $1,472 for a flight from Chicago to Portugal. The cheapest flight overall is $186 while the most popular route, (Chicago O'Hare Intl - Lisbon Humberto Delgado) is currently priced at $370.

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

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

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

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

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

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

    Currently, December is the cheapest month in which you can book a flight from Chicago to Portugal (average of $411). Flying from Chicago to Portugal in June is currently the most expensive (average of $695). 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 Chicago to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Chicago to Portugal

Discover the top 10 airlines that operate flights from Chicago to Portugal. 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$369Average$472FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$425Average$564FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$441Average$708FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$468Average$825FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$470Average$648FlexibilityNo cancel feeOn-time77%
IberiaCheapest$487Average$756FlexibilityNo cancel feeOn-time77%
SWISSCheapest$496Average$721FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$497Average$895FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$504Average$755FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$510Average$739FlexibilityNo cancel feeOn-time71%

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