HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$323+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LIS
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Chicago to Portugal with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$548
(Gotogate)

One-way from

$323
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$705

Good round-trip deal

$665 or less

Good one-way deal

$336 or less
Provider with most accurate pricing for Chicago (CHI)-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Lisbon Humberto Delgado flights.
Search Deals
From Chicago (CHI) to Portugal
Search Deals
One-way flight from Chicago (CHI) to Portugal
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($212 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Chicago (CHI) to Portugal.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to Portugal.
Search Deals

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 March 31, 2025.

This Gotogate deal was found by Cheapflights users on 3/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/147:15 pmORD - FAO
1 stop31h 35mScandinavian Airlines
Wed 4/309:40 amFAO - ORD
1 stop36h 30mScandinavian Airlines
Deal found 3/30$548
This Gotogate deal was found by Cheapflights users on 3/31. 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.
Sun 4/136:00 pmORD - OPO
1 stop31h 50mTAP AIR PORTUGAL
Tue 4/294:00 pmOPO - ORD
1 stop30h 10mTAP AIR PORTUGAL
Deal found 3/31$551
This FlightHub deal was found by Cheapflights users on 3/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/187:25 pmORD - LIS
1 stop19h 55mIcelandair
Thu 10/2310:20 pmLIS - ORD
1 stop28h 55mIcelandair
Deal found 3/30$562
This United deal was found by Cheapflights users on 3/31. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/134:00 pmORD - OPO
1 stop17h 45mUnited Airlines
Tue 11/116:00 amOPO - ORD
2 stops23h 12mUnited Airlines
Deal found 3/31$562
This Justfly.com deal was found by Cheapflights users on 3/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/12:05 pmORD - LIS
2 stops15h 20mAir Canada
Tue 4/811:25 amLIS - ORD
2 stops16h 41mAir Canada
Deal found 3/30$563
This Delta deal was found by Cheapflights users on 3/30. 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.
Tue 4/11:16 pmMDW - LIS
2 stops15h 59mDelta
Tue 4/85:00 amLIS - MDW
2 stops19h 02mDelta
Deal found 3/30$564
This Delta deal was found by Cheapflights users on 3/31. 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.
Wed 11/1211:00 amORD - LIS
2 stops17h 35mDelta
Thu 11/275:00 amLIS - ORD
2 stops19h 38mDelta
Deal found 3/31$569
This United deal was found by Cheapflights users on 3/31. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:35 pmORD - LIS
1 stop32h 40mMultiple Airlines
Thu 12/1111:00 amLIS - ORD
1 stop33h 45mMultiple Airlines
Deal found 3/31$571
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:40 pmORD - LIS
2 stops16h 15mBritish Airways
Wed 11/127:05 amLIS - ORD
2 stops16h 32mBritish Airways
Deal found 3/31$572
This CrystalTravel deal was found by Cheapflights users on 3/30. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/19:40 pmORD - LIS
1 stop18h 10mLufthansa
Thu 5/112:15 pmLIS - ORD
1 stop13h 40mLufthansa
Deal found 3/30$575
This Finnair deal was found by Cheapflights users on 3/30. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:35 pmORD - LIS
1 stop18h 50mFinnair
Tue 10/286:30 amLIS - ORD
1 stop14h 00mFinnair
Deal found 3/30$580
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/305:50 pmORD - LIS
1 stop22h 00mUnited Airlines
Sun 4/611:25 amLIS - ORD
2 stops35h 19mUnited Airlines
Deal found 3/30$586

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 March 31, 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 4/14

7:15 pm-8:50 am

1 stop31h 35m

Faro

Wed 4/30

9:40 am-4:10 pm

1 stop36h 30m

$548

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/13

6:00 pm-7:50 am

1 stop31h 50m

Porto

Tue 4/29

4:00 pm-4:10 pm

1 stop30h 10m

$551

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/13

6:00 pm-9:05 pm

2 stops21h 05m

Porto

Tue 4/29

6:35 pm-4:10 pm

2 stops27h 35m

$598

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 5/14

10:40 am-11:25 am

2 stops18h 45m

Porto

Wed 5/21

6:00 am-8:12 pm

2 stops20h 12m

$600

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/3

11:25 am-10:05 am

1 stop16h 40m

Porto

Tue 9/9

10:50 am-9:40 am

1 stop28h 50m

$603

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 5/6

2:20 pm-11:20 pm

1 stop27h 00m

Lisbon Humberto Delgado

Tue 5/13

6:45 am-8:12 pm

2 stops19h 27m

$609

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 5/6

2:20 pm-11:30 am

1 stop15h 10m

Porto

Wed 5/21

8:40 am-3:55 pm

1 stop13h 15m

$614

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 8/31

7:00 am-11:10 am

2 stops22h 10m

Porto

Wed 9/10

11:50 am-4:10 pm

1 stop34h 20m

$615

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Mon 5/12

8:30 pm-11:10 pm

1 stop20h 40m

Lisbon Humberto Delgado

Wed 5/21

6:35 am-2:15 pm

1 stop13h 40m

$620

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/27

4:30 pm-3:55 pm

1 stop17h 25m

Porto

Fri 5/9

8:15 am-2:15 pm

1 stop12h 00m

$622

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 60 results
1
2
3
...
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 $1,213). 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 March 31, 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 April 28, 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. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, 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 51.8 F).

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 March 31, 2025.
Read reviews from past customers who have flown Delta, Porter Airlines and KLM from Chicago to Portugal. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
7.9
Good
277 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Transat
7.8
Good
381 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $330. Scandinavian Airlines flights start at $376 while deals on Aer Lingus start at $382 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 $2,192 for a flight from Chicago to Portugal. The cheapest flight overall is $249 while the most popular route, (Chicago O'Hare Intl - Lisbon Humberto Delgado) is currently priced at $535.

  • 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 $1,213). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Chicago to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Heathrow flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
O'Hare Intl to Athens flights
O'Hare Intl to Charles de Gaulle flights
O'Hare Intl to Dublin flights
O'Hare Intl to Barcelona-El Prat flights
O'Hare Intl to Madrid flights
O'Hare Intl to Istanbul flights
O'Hare Intl to Orly flights
O'Hare Intl to Gatwick flights
O'Hare Intl to Frederic Chopin flights
O'Hare Intl to Lisbon flights
O'Hare Intl to London City flights
O'Hare Intl to Frankfurt flights
O'Hare Intl to Amsterdam flights
Midway to Leonardo da Vinci/Fiumicino flights
O'Hare Intl to Malpensa flights
Midway to Heathrow flights
Midway to Charles de Gaulle flights
O'Hare Intl to Krakow flights
O'Hare Intl to Zurich flights
Midway to Athens flights
O'Hare Intl to Bruxelles-National flights
O'Hare Intl to Keflavik Intl flights
O'Hare Intl to Edinburgh flights
O'Hare Intl to Munich flights
Midway to Dublin flights
O'Hare Intl to Oslo Gardermoen flights
O'Hare Intl to Copenhagen flights
Midway to Barcelona-El Prat flights
O'Hare Intl to Linate flights
O'Hare Intl to Vienna flights
O'Hare Intl to Sabiha Gokcen flights
Midway to Madrid flights
O'Hare Intl to Belgrade flights
O'Hare Intl to Vicenza flights
O'Hare Intl to Stansted flights
Midway to Lisbon flights
St. Louis to Heathrow flights
Midway to Istanbul flights
O'Hare Intl to Florence flights
O'Hare Intl to Tirana flights
Midway to Amsterdam flights
O'Hare Intl to Skopje flights
Midway to Oslo Gardermoen flights
O'Hare Intl to Prague flights
O'Hare Intl to Luton flights
O'Hare Intl to Berlin flights
Midway to Frankfurt flights
O'Hare Intl to Budapest flights

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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$420Average$860FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$445Average$585FlexibilityNo cancel feeOn-time76%
FinnairCheapest$463Average$746FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$468Average$770FlexibilityNo cancel feeOn-time71%
IberiaCheapest$472Average$789FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$702FlexibilityNo cancel feeOn-time72%
DeltaCheapest$498Average$761FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$515Average$920FlexibilityNo cancel feeOn-time70%
KLMCheapest$527Average$736FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$531Average$927FlexibilityNo cancel feeOn-time69%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.