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$224+ 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LIS
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$413
(FlightHub)

One-way from

$224
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$657

Good round-trip deal

$443 or less

Good one-way deal

$255 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 ($154 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 October 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 October 23, 2025.

This FlightHub deal was found by Cheapflights users on 10/23. 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.
Wed 12/37:10 pmORD - OPO
1 stop13h 55mTAP AIR PORTUGAL
Sun 12/146:55 amOPO - ORD
1 stop13h 50mTAP AIR PORTUGAL
Deal found 10/23$413
This oojo deal was found by Cheapflights users on 10/21. 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 stop16h 50mTAP AIR PORTUGAL
Wed 12/108:55 amOPO - ORD
1 stop12h 05mTAP AIR PORTUGAL
Deal found 10/21$425
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/104:20 pmORD - OPO
1 stop13h 20mLufthansa
Wed 11/2612:30 pmOPO - ORD
1 stop13h 35mLufthansa
Deal found 10/22$447
This Mytrip deal was found by Cheapflights users on 10/22. 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.
Mon 11/1012:50 pmORD - OPO
2 stops18h 00mMultiple Airlines
Wed 11/2612:30 pmOPO - ORD
1 stop13h 35mMultiple Airlines
Deal found 10/22$456
This FlightHub deal was found by Cheapflights users on 10/22. 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.
Fri 11/287:20 pmORD - FNC
1 stop14h 00mScandinavian Airlines
Sat 12/64:10 pmFNC - ORD
1 stop30h 35mScandinavian Airlines
Deal found 10/22$457
This KAYAK deal was found by Cheapflights users on 10/21. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:50 pmORD - OPO
1 stop34h 25mSWISS
Tue 12/97:25 pmOPO - ORD
1 stop26h 55mSWISS
Deal found 10/21$462
This KAYAK deal was found by Cheapflights users on 10/21. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:20 pmORD - OPO
1 stop15h 35mScandinavian Airlines
Fri 12/55:35 pmOPO - ORD
1 stop29h 10mScandinavian Airlines
Deal found 10/21$470
This United deal was found by Cheapflights users on 10/22. 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 11/172:30 pmORD - OPO
1 stop13h 00mMultiple Airlines
Mon 11/2412:05 pmOPO - ORD
1 stop34h 15mMultiple Airlines
Deal found 10/22$477
This oojo deal was found by Cheapflights users on 10/21. 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.
Sun 11/308:25 pmORD - OPO
1 stop10h 35mTAP AIR PORTUGAL
Sun 12/76:55 amOPO - ORD
1 stop13h 50mTAP AIR PORTUGAL
Deal found 10/21$480
This Delta deal was found by Cheapflights users on 10/21. 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 12/19:51 amORD - OPO
2 stops18h 39mDelta
Tue 12/911:15 amOPO - ORD
1 stop33h 05mDelta
Deal found 10/21$482
This oojo deal was found by Cheapflights users on 10/21. 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 12/58:15 pmORD - FAO
1 stop21h 35mTAP AIR PORTUGAL
Fri 12/126:05 amFAO - ORD
1 stop15h 20mTAP AIR PORTUGAL
Deal found 10/21$485
This Delta deal was found by Cheapflights users on 10/23. 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 11/44:56 pmORD - LIS
2 stops16h 14mDelta
Thu 11/2011:25 amLIS - ORD
1 stop32h 55mDelta
Deal found 10/23$490

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 October 23, 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

Wed 1/14

7:10 pm-7:00 pm

1 stop17h 50m

Porto

Sat 1/24

8:00 pm-2:45 pm

1 stop24h 45m

$470

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 3/3

4:10 pm-9:30 am

1 stop11h 20m

Porto

Wed 3/11

6:00 am-4:20 pm

1 stop15h 20m

$474

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/17

2:30 pm-9:30 am

1 stop13h 00m

Porto

Mon 11/24

12:05 pm-4:20 pm

1 stop34h 15m

$477

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/4

12:35 pm-9:30 am

2 stops14h 55m

Porto

Tue 3/10

6:00 am-4:20 pm

1 stop15h 20m

$478

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/30

6:50 pm-11:15 am

1 stop34h 25m

Porto

Mon 12/8

12:05 pm-4:20 pm

1 stop34h 15m

$482

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/3

10:45 am-10:30 am

2 stops17h 45m

Porto

Wed 12/10

6:00 am-2:20 pm

1 stop14h 20m

$482

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/3

4:25 pm-3:25 pm

1 stop17h 00m

Porto

Tue 12/9

11:15 am-2:20 pm

1 stop33h 05m

$483

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Fri 12/5

8:15 pm-11:50 pm

1 stop21h 35m

Faro

Fri 12/12

6:05 am-3:25 pm

1 stop15h 20m

$485

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/9

6:20 pm-10:30 am

1 stop11h 10m

Porto

Mon 3/16

11:15 am-4:37 pm

2 stops34h 22m

$487

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Wed 1/14

7:10 pm-3:45 pm

1 stop14h 35m

Faro

Thu 3/12

4:35 pm-4:25 pm

1 stop28h 50m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

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 October 23, 2025.

It’s typically best to fly out from Chicago to Portugal at noon. Doing so could potentially save you 9% 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. Saturday 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 October 23, 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
8,991 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,991 reviews
United Airlines
7.4
Good
8,991 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
American Airlines
7.2
Good
11,028 reviews
United Airlines
7.4
Good
8,991 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Air Canada
7.1
Good
10,346 reviews
United Airlines
7.4
Good
8,991 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
TAP AIR PORTUGAL
7.1
Good
2,030 reviews
United Airlines
7.4
Good
8,991 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
British Airways
6.7
Okay
7,467 reviews
United Airlines
7.4
Good
8,991 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

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 $474, TAP AIR PORTUGAL can have you in Portugal from Chicago in 11h 20m. There are 3931 mi between Chicago and Portugal. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Chicago to Portugal one-way?

    To fly one-way, consider booking your trip with Scandinavian Airlines, which is currently one of the cheapest options available, starting at $370. TAP AIR PORTUGAL flights start at $407 while deals on Delta start at $423 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 $1,374 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 $375.

  • 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.

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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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$369Average$478FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$425Average$564FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$441Average$715FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$464Average$819FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$470Average$662FlexibilityNo cancel feeOn-time77%
IberiaCheapest$487Average$754FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$490Average$640FlexibilityNo cancel feeOn-time72%
SWISSCheapest$496Average$721FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$497Average$891FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$504Average$751FlexibilityNo cancel feeOn-time70%

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