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$235+ 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
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$453
(oojo)

One-way from

$235
(Delta)

Popular in

June

Cheapest in

February

Average price

$560

Good round-trip deal

$489 or less

Good one-way deal

$349 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 ($155 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This oojo deal was found by Cheapflights users on 1/7. 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 10/308:20 pmORD - FNC
1 stop14h 00mScandinavian Airlines
Sat 11/74:10 pmFNC - ORD
1 stop30h 35mScandinavian Airlines
Deal found 1/7$432
This oojo deal was found by Cheapflights users on 1/7. 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.
Mon 4/137:15 pmORD - OPO
1 stop33h 45mScandinavian Airlines
Fri 4/175:55 pmOPO - ORD
1 stop28h 15mScandinavian Airlines
Deal found 1/7$453
This lol.travel deal was found by Cheapflights users on 1/7. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/168:15 pmORD - OPO
1 stop15h 45mTAP AIR PORTUGAL
Sat 1/316:00 pmOPO - ORD
1 stop26h 45mTAP AIR PORTUGAL
Deal found 1/7$454
This oojo deal was found by Cheapflights users on 1/7. 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 2/47:10 pmORD - OPO
1 stop17h 50mTAP AIR PORTUGAL
Wed 2/116:55 amOPO - ORD
1 stop14h 05mTAP AIR PORTUGAL
Deal found 1/7$462
This oojo deal was found by Cheapflights users on 1/6. 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.
Fri 2/208:15 pmORD - FAO
1 stop13h 30mTAP AIR PORTUGAL
Thu 2/2611:15 amFAO - ORD
1 stop34h 10mTAP AIR PORTUGAL
Deal found 1/6$479
This FlightHub deal was found by Cheapflights users on 1/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:00 pmORD - OPO
1 stop11h 00mTAP AIR PORTUGAL
Sat 4/255:05 amOPO - ORD
1 stop17h 10mTAP AIR PORTUGAL
Deal found 1/6$479
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/207:15 pmORD - OPO
1 stop33h 45mScandinavian Airlines
Fri 4/245:55 pmOPO - ORD
1 stop28h 15mScandinavian Airlines
Deal found 1/6$482
This Mytrip deal was found by Cheapflights users on 1/8. 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 2/226:30 pmORD - OPO
2 stops22h 15mMultiple Airlines
Sun 3/16:00 amOPO - ORD
2 stops17h 20mMultiple Airlines
Deal found 1/8$488
This Kiwi.com deal was found by Cheapflights users on 1/7. 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.
Wed 2/47:10 pmORD - OPO
1 stop11h 55mTAP AIR PORTUGAL
Sun 2/156:55 amOPO - ORD
1 stop13h 50mTAP AIR PORTUGAL
Deal found 1/7$489
This United Airlines deal was found by Cheapflights users on 1/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/1812:38 pmORD - LIS
2 stops13h 32mUnited Airlines
Thu 1/295:00 amLIS - ORD
1 stop14h 25mUnited Airlines
Deal found 1/6$490
This Air Canada deal was found by Cheapflights users on 1/6. 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.
Tue 1/2012:50 pmORD - LIS
1 stop14h 30mAir Canada
Fri 1/3011:20 amLIS - ORD
2 stops31h 55mAir Canada
Deal found 1/6$491
This Delta deal was found by Cheapflights users on 1/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/1810:29 amORD - LIS
2 stops22h 41mDelta
Fri 1/305:00 amLIS - ORD
1 stop15h 20mDelta
Deal found 1/6$492

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 January 8, 2026.
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

Fri 1/16

8:15 pm-6:00 pm

1 stop15h 45m

Porto

Sat 1/31

6:00 pm-2:45 pm

1 stop26h 45m

$454

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Fri 2/20

8:15 pm-3:45 pm

1 stop13h 30m

Faro

Thu 2/26

11:15 am-3:25 pm

1 stop34h 10m

$479

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 2/22

6:30 pm-10:45 pm

2 stops22h 15m

Porto

Sun 3/1

6:00 am-5:20 pm

2 stops17h 20m

$488

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 3/25

4:21 pm-2:50 pm

2 stops17h 29m

Lisbon Humberto Delgado

Thu 4/2

7:20 am-6:15 pm

1 stop16h 55m

$495

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 3/1

10:36 am-8:55 am

1 stop16h 19m

Lisbon Humberto Delgado

Mon 3/9

5:00 am-6:49 pm

2 stops18h 49m

$498

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Mon 2/2

5:10 pm-12:05 pm

1 stop12h 55m

Lisbon Humberto Delgado

Sat 2/28

6:45 pm-2:55 pm

1 stop26h 10m

$499

ChicagoLisbon

MDW - LIS

MDWLIS

Chicago Midway

Tue 3/17

12:47 pm-10:35 am

2 stops16h 48m

Lisbon Humberto Delgado

Wed 4/1

5:00 am-6:40 pm

2 stops19h 40m

$501

ChicagoLisbon

MDW - LIS

MDWLIS

Chicago Midway

Sun 3/8

1:10 pm-11:20 am

2 stops17h 10m

Lisbon Humberto Delgado

Tue 3/17

5:00 am-6:40 pm

2 stops18h 40m

$502

ChicagoLisbon

MDW - LIS

MDWLIS

Chicago Midway

Mon 3/9

12:47 pm-9:00 am

2 stops15h 13m

Lisbon Humberto Delgado

Wed 4/8

5:00 am-6:40 pm

2 stops19h 40m

$503

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Mon 4/6

5:10 pm-11:15 am

1 stop12h 05m

Lisbon Humberto Delgado

Thu 4/16

10:00 am-8:40 pm

2 stops16h 40m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/8

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 $405). Flying from Chicago to Portugal in June is currently the most expensive (average of $690). 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 January 8, 2026.

When flying from Chicago to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How often are flights from Chicago to Portugal delayed?

About 42% of weekly flights between Chicago and Portugal have experienced delays in the past year, with the average delay time being 138 minutes.

What is the most punctual flight time for Chicago to Portugal flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Chicago to Portugal flights?

Over the last year, TAP AIR PORTUGAL have had the lowest number of delays on this route, with just 42% of flights being delayed.

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 January 8, 2026.
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
9,142 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,142 reviews
United Airlines
7.4
Good
9,142 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
American Airlines
7.2
Good
11,097 reviews
United Airlines
7.4
Good
9,142 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Air Canada
7.1
Good
10,603 reviews
United Airlines
7.4
Good
9,142 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
TAP AIR PORTUGAL
7.1
Good
2,111 reviews
United Airlines
7.4
Good
9,142 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
British Airways
6.7
Okay
7,659 reviews
United Airlines
7.4
Good
9,142 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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 $454, TAP AIR PORTUGAL can have you in Portugal from Chicago in 15h 45m. 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 British Airways, which is currently one of the cheapest options available, starting at $210. TAP AIR PORTUGAL flights start at $284 while deals on Delta start at $378 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 $1,396 for a flight from Chicago to Portugal. The cheapest flight overall is $288 while the most popular route, (Chicago O'Hare Intl - Lisbon Humberto Delgado) is currently priced at $369.

  • 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 $405). Flying from Chicago to Portugal in June is currently the most expensive (average of $690). 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$369Average$478FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$396Average$561FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$441Average$694FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$470Average$605FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$480Average$825FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$488Average$740FlexibilityNo cancel feeOn-time77%
SWISSCheapest$489Average$721FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$494Average$895FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$504Average$756FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$505Average$752FlexibilityNo cancel feeOn-time71%

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