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$253+ 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LIS
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
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 August 17, 2025.

Round-trip from

$447
(FlightHub)

One-way from

$253
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$766

Good round-trip deal

$383 or less

Good one-way deal

$236 or less
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 ($152 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 August 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 August 17, 2025.

This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:15 pmORD - FAO
1 stop31h 35mScandinavian Airlines
Wed 10/159:40 amFAO - ORD
1 stop36h 30mScandinavian Airlines
Deal found 8/16$447
This Rumbo deal was found by Cheapflights users on 8/16. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:15 pmORD - FAO
1 stop13h 05mScandinavian Airlines
Wed 10/229:40 amFAO - ORD
1 stop36h 30mScandinavian Airlines
Deal found 8/16$452
This Scandinavian Airlines deal was found by Cheapflights users on 8/13. 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.
Fri 11/77:20 pmORD - FNC
1 stop14h 00mScandinavian Airlines
Sat 11/154:10 pmFNC - ORD
1 stop30h 35mScandinavian Airlines
Deal found 8/13$459
This Scandinavian Airlines deal was found by Cheapflights users on 8/13. 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.
Fri 10/318:20 pmORD - FNC
1 stop14h 00mScandinavian Airlines
Sat 11/84:10 pmFNC - ORD
1 stop30h 35mScandinavian Airlines
Deal found 8/13$469
This United deal was found by Cheapflights users on 8/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:15 amORD - OPO
1 stop20h 15mMultiple Airlines
Wed 11/196:00 amOPO - ORD
1 stop20h 05mMultiple Airlines
Deal found 8/13$484
This oojo deal was found by Cheapflights users on 8/14. 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 10/298:10 pmORD - OPO
1 stop13h 55mTAP AIR PORTUGAL
Sun 11/95:00 amOPO - ORD
1 stop16h 00mTAP AIR PORTUGAL
Deal found 8/14$486
This oojo deal was found by Cheapflights users on 8/15. 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.
Fri 10/176:00 pmORD - OPO
1 stop10h 35mTAP AIR PORTUGAL
Tue 10/288:00 pmOPO - ORD
1 stop25h 00mTAP AIR PORTUGAL
Deal found 8/15$487
This United deal was found by Cheapflights users on 8/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/292:00 pmORD - OPO
2 stops14h 30mMultiple Airlines
Wed 11/512:30 pmOPO - ORD
1 stop13h 35mMultiple Airlines
Deal found 8/14$489
This United deal was found by Cheapflights users on 8/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/115:31 pmORD - OPO
1 stop9h 59mMultiple Airlines
Tue 11/1812:05 pmOPO - ORD
1 stop34h 15mMultiple Airlines
Deal found 8/14$492
This United Airlines deal was found by Cheapflights users on 8/14. 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 11/115:31 pmORD - OPO
1 stop9h 59mUnited Airlines
Tue 11/1812:30 pmOPO - ORD
2 stops26h 27mUnited Airlines
Deal found 8/14$495
This United deal was found by Cheapflights users on 8/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:45 pmORD - OPO
2 stops14h 45mMultiple Airlines
Mon 12/112:05 pmOPO - ORD
1 stop34h 15mMultiple Airlines
Deal found 8/13$496
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Wed 10/298:50 amORD - OPO
2 stops19h 40mUnited Airlines
Wed 11/512:30 pmOPO - ORD
2 stops26h 27mUnited Airlines
Deal found 8/14$499

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 August 17, 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

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Mon 10/6

7:15 pm-8:50 am

1 stop31h 35m

Faro

Wed 10/15

9:40 am-4:10 pm

1 stop36h 30m

$447

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Mon 10/6

7:15 pm-2:20 pm

1 stop13h 05m

Faro

Wed 10/22

9:40 am-4:10 pm

1 stop36h 30m

$452

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/5

7:15 am-9:30 am

1 stop20h 15m

Porto

Wed 11/19

6:00 am-8:05 pm

1 stop20h 05m

$484

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/5

2:30 pm-9:30 am

1 stop13h 00m

Porto

Wed 11/19

12:30 pm-8:05 pm

1 stop13h 35m

$484

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/29

6:25 pm-9:30 am

1 stop10h 05m

Porto

Wed 11/5

12:30 pm-8:05 pm

1 stop13h 35m

$484

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/29

8:10 pm-3:05 pm

1 stop13h 55m

Porto

Sun 11/9

5:00 am-3:00 pm

1 stop16h 00m

$486

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 11/7

8:15 pm-7:00 pm

1 stop16h 45m

Porto

Fri 11/14

6:55 am-3:15 pm

1 stop14h 20m

$486

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 10/17

6:00 pm-10:35 am

1 stop10h 35m

Porto

Tue 10/28

8:00 pm-4:00 pm

1 stop25h 00m

$487

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/29

2:00 pm-9:30 am

2 stops14h 30m

Porto

Wed 11/5

12:30 pm-8:05 pm

1 stop13h 35m

$489

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 11/11

5:31 pm-9:30 am

1 stop9h 59m

Porto

Tue 11/18

12:05 pm-4:20 pm

1 stop34h 15m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 60 results
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2
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6

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, January is the cheapest month in which you can book a flight from Chicago to Portugal (average of $612). Flying from Chicago to Portugal in June is currently the most expensive (average of $1,128). 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 August 17, 2025.

It’s typically best to fly out from Chicago to Portugal at noon. Doing so could potentially save you 33% 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 afternoons 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 August 17, 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
8,919 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,919 reviews
United Airlines
7.4
Good
8,919 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,919 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,977 reviews
United Airlines
7.4
Good
8,919 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
TAP AIR PORTUGAL
7.1
Good
1,954 reviews
United Airlines
7.4
Good
8,919 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,271 reviews
United Airlines
7.4
Good
8,919 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • What are the cheapest airlines to fly from Chicago to Portugal 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 $263. Delta flights start at $400 while deals on KLM start at $416 one-way.

  • 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 $844 for a flight from Chicago to Portugal. The cheapest flight overall is $180 while the most popular route, (Chicago O'Hare Intl - Lisbon Humberto Delgado) is currently priced at $381.

  • 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, January is the cheapest month in which you can book a flight from Chicago to Portugal (average of $612). Flying from Chicago to Portugal in June is currently the most expensive (average of $1,128). 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 August 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$411Average$659FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$444Average$561FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$453Average$818FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$463Average$731FlexibilityNo cancel feeOn-time76%
IberiaCheapest$474Average$743FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$702FlexibilityNo cancel feeOn-time72%
Aer LingusCheapest$494Average$939FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$504Average$750FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$511Average$759FlexibilityNo cancel feeOn-time71%
SWISSCheapest$517Average$732FlexibilityNo cancel feeOn-time79%

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