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$227+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LIS
ene. 7 — ene. 141
mié. 1/7
mié. 1/14
1 adult, Economy
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Cheap 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 diciembre 8, 2025.

This Air Canada deal was found by Cheapflights users on 12/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/97:20 amORD - LIS
2 stops20h 00mAir Canada
mié. 12/1711:00 amLIS - ORD
2 stops37h 53mAir Canada
Deal found 12/8$501
This deal was found by Cheapflights users on 12/7. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/302:30 pmORD - LIS
1 stop13h 45mUnited Airlines
mié. 1/1410:15 amLIS - ORD
1 stop12h 41mUnited Airlines
Deal found 12/7$506
This KAYAK deal was found by Cheapflights users on 12/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/89:05 pmORD - LIS
2 stops32h 20mSWISS
lun. 12/1511:50 amLIS - ORD
2 stops30h 20mSWISS
Deal found 12/7$517
This KLM deal was found by Cheapflights users on 12/6. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/101:23 pmORD - LIS
1 stop13h 17mKLM
dom. 12/145:00 amLIS - ORD
1 stop15h 20mKLM
Deal found 12/6$536
This KLM deal was found by Cheapflights users on 12/6. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/84:25 pmORD - FNC
1 stop35h 10mKLM
dom. 12/1410:10 amFNC - ORD
1 stop34h 10mKLM
Deal found 12/6$542
This Booking.com deal was found by Cheapflights users on 12/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/143:50 pmORD - LIS
1 stop12h 20mAer Lingus
mar. 12/1610:50 amLIS - ORD
1 stop13h 05mAer Lingus
Deal found 12/5$544
This Finnair deal was found by Cheapflights users on 12/6. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/154:55 pmORD - LIS
1 stop10h 10mMultiple Airlines
lun. 2/98:45 pmLIS - ORD
1 stop24h 10mMultiple Airlines
Deal found 12/6$545
This KAYAK deal was found by Cheapflights users on 12/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:30 pmORD - LIS
1 stop19h 50mIcelandair
dom. 1/119:20 pmLIS - ORD
1 stop26h 00mIcelandair
Deal found 12/7$546
This American Airlines deal was found by Cheapflights users on 12/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/83:29 pmORD - LIS
2 stops11h 36mAmerican Airlines
lun. 12/158:20 amLIS - ORD
1 stop12h 35mAmerican Airlines
Deal found 12/7$549
This Delta deal was found by Cheapflights users on 12/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/810:49 amMDW - LIS
2 stops16h 11mDelta
lun. 12/155:00 amLIS - MDW
2 stops19h 00mDelta
Deal found 12/7$551
This KLM deal was found by Cheapflights users on 12/6. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/75:59 pmORD - FNC
2 stops57h 36mKLM
dom. 12/1410:10 amFNC - ORD
1 stop34h 10mKLM
Deal found 12/6$558
This KAYAK deal was found by Cheapflights users on 12/6. 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.
lun. 12/89:05 pmORD - LIS
2 stops32h 20mSWISS
sáb. 12/1312:35 pmLIS - ORD
2 stops55h 35mSWISS
Deal found 12/6$568

Find flight deals from Chicago to Portugal

Keep the following information in mind while searching for Chicago to Portugal flight deals. Data was last updated diciembre 8, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$428
(oojo)

One-way from

$227
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$879

Good round-trip deal

$439 or less

Good one-way deal

$387 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. 17% potential increase in price ($153 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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

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 diciembre 8, 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

mié. 2/4

3:35 pm-1:15 pm

2 stops15h 40m

Porto

mié. 2/11

6:00 am-1:25 pm

1 stop13h 25m

$482

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mar. 1/13

1:55 pm-10:30 am

2 stops14h 35m

Porto

mar. 1/27

11:15 am-2:20 pm

1 stop33h 05m

$482

ChicagoFunchal

ORD - FNC

ORDFNC

Chicago O'Hare Intl

vie. 2/13

7:20 pm-3:20 pm

1 stop14h 00m

Funchal Madeira

sáb. 2/28

4:10 pm-4:45 pm

1 stop30h 35m

$482

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

lun. 2/9

5:20 pm-10:30 am

1 stop11h 10m

Porto

lun. 2/16

11:15 am-8:44 pm

2 stops39h 29m

$488

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mié. 1/21

2:25 pm-3:25 pm

2 stops19h 00m

Porto

mié. 1/28

5:00 am-2:20 pm

1 stop15h 20m

$488

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mié. 2/4

3:35 pm-1:15 pm

2 stops15h 40m

Porto

mié. 2/11

6:00 am-7:45 pm

2 stops19h 45m

$489

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

lun. 1/26

1:58 pm-10:30 am

2 stops14h 32m

Porto

vie. 2/6

5:00 am-4:55 pm

2 stops17h 55m

$492

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

dom. 2/8

7:01 am-10:30 am

2 stops21h 29m

Porto

lun. 2/16

11:15 am-8:44 pm

2 stops39h 29m

$492

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

mié. 2/4

1:31 pm-10:30 am

2 stops14h 59m

Porto

mié. 2/11

4:10 pm-5:37 pm

2 stops31h 27m

$492

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mar. 2/10

7:00 am-10:30 am

2 stops21h 30m

Porto

lun. 2/16

11:15 am-4:41 pm

2 stops35h 26m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

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 $411). Flying from Chicago to Portugal in June is currently the most expensive (average of $691). 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 diciembre 8, 2025.

It’s typically best to fly out from Chicago to Portugal in the afternoon. Doing so could potentially save you 6% 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.

How often are flights from Chicago to Portugal delayed?

About 43% of weekly flights between Chicago and Portugal have experienced delays in the past year, with the average delay time being 139 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 diciembre 8, 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
9,078 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,078 reviews
United Airlines
7.4
Good
9,078 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
American Airlines
7.2
Good
11,044 reviews
United Airlines
7.4
Good
9,078 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Air Canada
7.1
Good
10,512 reviews
United Airlines
7.4
Good
9,078 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
TAP AIR PORTUGAL
7.1
Good
2,085 reviews
United Airlines
7.4
Good
9,078 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
British Airways
6.7
Okay
7,564 reviews
United Airlines
7.4
Good
9,078 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 $488, KLM 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 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 $285 while deals on Delta start at $363 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 $1,393 for a flight from Chicago to Portugal. The cheapest flight overall is $287 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 $691). 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 diciembre 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$369Average$472FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$396Average$561FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$441Average$696FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$470Average$648FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$480Average$824FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$488Average$756FlexibilityNo cancel feeOn-time77%
SWISSCheapest$489Average$704FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$494Average$908FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$503Average$600FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$504Average$757FlexibilityNo cancel feeOn-time70%

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