What are the cheapest airlines to fly from Portugal to Chicago 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 $532. Aer Lingus flights start at $556 while deals on Turkish Airlines start at $608 one-way.

What is the cheapest day to fly from Portugal to Chicago?

Travelers seeking maximum savings on their Portugal to Chicago flight should consider departing on Friday mornings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from Portugal to Chicago?

Most travelers choose Lisbon Humberto Delgado - Chicago O'Hare Intl, Lisbon Humberto Delgado - Chicago Midway or Porto - Chicago O'Hare Intl when deciding on the best route from Portugal to Chicago.

What are the cheapest flights from Portugal to Chicago?

While on average a flight from Portugal to Chicago is generally $1,545, our data shows the cheapest flight currently is $521. When looking at the most popular route, (Lisbon Humberto Delgado - Chicago O'Hare Intl), you can expect to pay $652 for that flight.

What are the most popular airlines that fly from Portugal to Chicago?

The most popular airlines flying from Portugal to Chicago are Delta, Aer Lingus and TAP AIR PORTUGAL. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Portugal to Chicago?

It’s generally more expensive to depart on a Thursday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from Portugal to Chicago?

To save up to 41% on this flight, we recommend booking at least 34 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portugal to Chicago from $596 1-2 weeks out and tickets from $839 for flights departing within the next 72 hours.

What is the cheapest month to fly from Portugal to Chicago?

Our data shows that February tends to be the cheapest month to fly to Chicago from Portugal. Users have commonly found prices around $814 for the month, but tickets can be as low as $596. Due to multiple factors, prepare for potentially higher prices in July.

Can I find deals for flights from Portugal to Chicago that include hotel bookings?

Yes. In addition to deals on Portugal to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Portugal to Chicago?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to Chicago.

Can I find deals for business class flights from Portugal to Chicago?

Yes. Cheapflights offers flight deals from Portugal to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$789+ Flights from Portugal to Chicago

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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”

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Cheap flight deals from Portugal to Chicago

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$511 (Scandinavian Airlines)
One-way from	$341 (Kiwi.com)
Popular in	July
Cheapest in	February
Average price	$839
Good one-way deal	$630 or less

Provider with most accurate pricing for Lisbon Humberto Delgado-Chicago (CHI) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Chicago (CHI) flights.

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From Portugal to Chicago (CHI)

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One-way flight from Portugal to Chicago (CHI)

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Highest demand for flights based on searches. 11% potential increase in price ($110 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Price to beat on a one-way flight from Portugal to Chicago (CHI).

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Find flight deals from Portugal to Chicago

Cheapest flights from Portugal to Chicago
Explore the most affordable flight options available from Portugal to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

Wed 10/19:40 amFAO - ORD

1 stop36h 30mScandinavian Airlines

Fri 1/307:20 pmORD - FAO

1 stop15h 00mScandinavian Airlines

Deal found 4/23

$511

Fri 10/105:55 pmOPO - ORD

1 stop28h 15mScandinavian Airlines

Thu 10/167:15 pmORD - OPO

1 stop15h 50mScandinavian Airlines

Deal found 4/23

$522

Mon 6/95:00 amLIS - ORD

1 stop15h 10mDelta

Tue 6/246:27 pmORD - LIS

2 stops17h 23mDelta

Deal found 4/23

$680

Mon 6/96:35 amLIS - ORD

1 stop13h 40mIberia

Tue 6/244:44 pmORD - LIS

1 stop10h 21mIberia

Deal found 4/23

$683

Thu 5/1510:30 pmOPO - ORD

2 stops23h 25mMultiple Airlines

Thu 5/299:40 pmORD - OPO

2 stops18h 25mMultiple Airlines

Deal found 4/23

$690

Thu 5/156:30 amOPO - ORD

1 stop13h 40mDelta

Thu 5/297:00 amORD - OPO

2 stops19h 25mDelta

Deal found 4/23

$695

Thu 10/910:10 pmLIS - ORD

2 stops52h 50mMultiple Airlines

Sat 10/185:10 pmORD - LIS

1 stop30h 20mMultiple Airlines

Deal found 4/23

$697

Mon 6/95:00 amLIS - MDW

2 stops18h 40mDelta

Tue 6/246:20 pmMDW - LIS

2 stops18h 20mDelta

Deal found 4/23

$704

Fri 6/136:40 amOPO - ORD

2 stops17h 23mKLM

Mon 6/237:00 pmORD - OPO

2 stops14h 35mKLM

Deal found 4/23

$706

Thu 5/159:55 amOPO - ORD

1 stop14h 20mBritish Airways

Thu 5/2910:25 pmORD - OPO

1 stop15h 55mBritish Airways

Deal found 4/22

$726

Thu 5/17:30 pmLIS - ORD

1 stop24h 40mKLM

Sat 5/244:20 pmORD - LIS

1 stop24h 30mKLM

Deal found 4/23

$733

Thu 6/1212:10 pmOPO - ORD

1 stop14h 10mUnited Airlines

Tue 6/241:26 pmORD - OPO

1 stop12h 19mUnited Airlines

Deal found 4/23

$738

Best flights from Portugal to Chicago
Discover carefully curated flight deals from Portugal to Chicago that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2025.

Wed 10/19:40 amFAO - ORD

1 stop36h 30mScandinavian Airlines

Fri 1/307:20 pmORD - FAO

1 stop15h 00mScandinavian Airlines

Deal found 4/23

$511

Mon 6/95:00 amLIS - ORD

1 stop15h 10mDelta

Tue 6/246:27 pmORD - LIS

2 stops17h 23mDelta

Deal found 4/23

$680

Mon 6/96:35 amLIS - ORD

1 stop13h 40mIberia

Tue 6/244:44 pmORD - LIS

1 stop10h 21mIberia

Deal found 4/23

$683

Thu 5/1510:30 pmOPO - ORD

2 stops23h 25mMultiple Airlines

Thu 5/299:40 pmORD - OPO

2 stops18h 25mMultiple Airlines

Deal found 4/23

$690

Fri 6/136:40 amOPO - ORD

2 stops17h 23mKLM

Mon 6/237:00 pmORD - OPO

2 stops14h 35mKLM

Deal found 4/23

$706

Thu 5/159:55 amOPO - ORD

1 stop14h 20mBritish Airways

Thu 5/2910:25 pmORD - OPO

1 stop15h 55mBritish Airways

Deal found 4/22

$726

Thu 6/1212:10 pmOPO - ORD

1 stop14h 10mUnited Airlines

Tue 6/241:26 pmORD - OPO

1 stop12h 19mUnited Airlines

Deal found 4/23

$738

Fri 6/65:55 amLIS - ORD

1 stop16h 00mSWISS

Thu 6/197:05 pmORD - LIS

1 stop16h 15mSWISS

Deal found 4/23

$754

Wed 10/86:45 amLIS - ORD

2 stops18h 44mAir Canada

Wed 10/153:35 pmORD - LIS

1 stop11h 45mAir Canada

Deal found 4/23

$777

Wed 10/86:15 amOPO - ORD

1 stop18h 00mLufthansa

Fri 10/179:40 pmORD - OPO

1 stop19h 40mLufthansa

Deal found 4/23

$779

Tue 10/712:30 pmLIS - ORD

1 stop11h 45mAmerican Airlines

Wed 10/1510:35 pmORD - LIS

1 stop18h 35mAmerican Airlines

Deal found 4/23

$782

Fri 10/36:05 amFAO - ORD

1 stop16h 25mTAP AIR PORTUGAL

Sun 2/18:25 pmORD - FAO

1 stop13h 20mTAP AIR PORTUGAL

Deal found 4/23

$796

Last-minute flights from Portugal to Chicago
Discover last-minute flight deals from Portugal to Chicago. Data last updated April 24, 2025 and is based on user searches.

Thu 5/17:30 pmLIS - ORD

1 stop24h 40mKLM

Sat 5/244:20 pmORD - LIS

1 stop24h 30mKLM

Deal found 4/23

$733

Thu 5/15:00 amLIS - ORD

1 stop15h 10mDelta

Sat 5/2410:35 amORD - LIS

2 stops18h 20mDelta

Deal found 4/23

$757

Thu 5/111:25 amLIS - ORD

1 stop14h 47mMultiple Airlines

Thu 5/227:05 pmORD - LIS

1 stop13h 40mMultiple Airlines

Deal found 4/23

$1,069

Thu 5/13:25 pmLIS - ORD

2 stops29h 30mLOT

Thu 5/229:40 pmORD - LIS

1 stop35h 35mLOT

Deal found 4/23

$1,152

Thu 5/112:15 pmLIS - ORD

1 stop17h 24mTAP AIR PORTUGAL

Sat 5/246:15 pmORD - LIS

Nonstop8h 00mTAP AIR PORTUGAL

Deal found 4/23

$1,918

Thu 5/1510:30 pmOPO - ORD

2 stops23h 25mMultiple Airlines

Thu 5/299:40 pmORD - OPO

2 stops18h 25mMultiple Airlines

Deal found 4/23

$690

Thu 5/156:30 amOPO - ORD

1 stop13h 40mDelta

Thu 5/297:00 amORD - OPO

2 stops19h 25mDelta

Deal found 4/23

$695

Thu 5/159:55 amOPO - ORD

1 stop14h 20mBritish Airways

Thu 5/2910:25 pmORD - OPO

1 stop15h 55mBritish Airways

Deal found 4/22

$726

Thu 5/1512:20 pmOPO - ORD

1 stop31h 55mIberia

Thu 5/2911:45 amORD - OPO

2 stops13h 50mIberia

Deal found 4/22

$752

Thu 5/1512:20 pmOPO - ORD

2 stops24h 55mAmerican Airlines

Thu 5/291:22 pmORD - OPO

2 stops16h 18mAmerican Airlines

Deal found 4/22

$960

Fri 5/166:00 amLIS - ORD

2 stops30h 42mMultiple Airlines

Wed 5/215:51 amORD - LIS

1 stop17h 39mMultiple Airlines

Deal found 4/23

$832

Fri 5/1611:35 amLIS - MDW

1 stop27h 10mMultiple Airlines

Wed 5/219:40 amMDW - LIS

2 stops18h 50mMultiple Airlines

Deal found 4/23

$1,083

One-way flights from Portugal to Chicago
Search for one-way flight options from Portugal to Chicago. Find affordable one-way fares based on user searches. Data last updated April 24, 2025.

Sat 5/1712:20 pmLIS - ORD

2 stops25h 07mMultiple Airlines

Deal found 4/23

$341

Thu 6/129:25 amLIS - MDW

2 stops53h 20mMultiple Airlines

Deal found 4/23

$385

Sat 7/129:45 pmFAO - ORD

3 stops56h 15mMultiple Airlines

Deal found 4/23

$496

Sat 9/201:15 pmLIS - ORD

Nonstop9h 15mTAP AIR PORTUGAL

Deal found 4/23

$532

Sat 9/2010:15 pmLIS - ORD

1 stop21h 45mAer Lingus

Deal found 4/22

$556

Wed 8/65:35 pmOPO - ORD

2 stops25h 00mMultiple Airlines

Deal found 4/23

$570

Wed 10/159:00 amOPO - ORD

1 stop13h 10mTAP AIR PORTUGAL

Deal found 4/23

$577

Tue 8/1210:50 amOPO - ORD

1 stop37h 05mTurkish Airlines

Deal found 4/22

$608

Wed 6/2510:55 amLIS - ORD

1 stop28h 45mTurkish Airlines

Deal found 4/22

$612

Wed 4/307:40 pmFAO - ORD

1 stop29h 20mAer Lingus

Deal found 4/23

$618

Sun 9/211:10 pmLIS - ORD

Nonstop9h 15mJetBlue

Deal found 4/23

$629

Sat 8/162:25 pmLIS - ORD

1 stop27h 40mLOT

Deal found 4/22

$648

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portugal to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

FaroChicago

FAO - ORD

FAOORD

Faro

Wed 10/1

9:40 am-4:10 pm

1 stop36h 30m

Chicago O'Hare Intl

Fri 1/30

7:20 pm-4:20 pm

1 stop15h 00m

$511

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/10

5:55 pm-4:10 pm

1 stop28h 15m

Chicago O'Hare Intl

Thu 10/16

7:15 pm-5:05 pm

1 stop15h 50m

$522

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Mon 6/9

5:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Tue 6/24

6:27 pm-5:50 pm

2 stops17h 23m

$680

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Mon 6/9

6:35 am-2:15 pm

1 stop13h 40m

Chicago O'Hare Intl

Tue 6/24

4:44 pm-9:05 am

1 stop10h 21m

$683

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 5/15

10:30 pm-3:55 pm

2 stops23h 25m

Chicago O'Hare Intl

Thu 5/29

9:40 pm-10:05 pm

2 stops18h 25m

$690

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 5/15

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

Thu 5/29

7:00 am-8:25 am

2 stops19h 25m

$695

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 10/9

10:10 pm-9:00 pm

2 stops52h 50m

Chicago O'Hare Intl

Sat 10/18

5:10 pm-5:30 am

1 stop30h 20m

$697

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Mon 6/9

5:00 am-5:40 pm

2 stops18h 40m

Chicago Midway

Tue 6/24

6:20 pm-6:40 pm

2 stops18h 20m

$704

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 6/13

6:40 am-6:03 pm

2 stops17h 23m

Chicago O'Hare Intl

Mon 6/23

7:00 pm-3:35 pm

2 stops14h 35m

$706

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 5/15

9:55 am-6:15 pm

1 stop14h 20m

Chicago O'Hare Intl

Thu 5/29

10:25 pm-8:20 pm

1 stop15h 55m

$726

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 57 results

...

Best time to book a flight from Portugal to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Portugal 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 Portugal to Chicago

What is the cheapest month to book a flight from Portugal to Chicago?

Currently, August is the cheapest month in which you can book a flight from Portugal to Chicago (average of $245). Flying from Portugal to Chicago in March is currently the most expensive (average of $321). 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 PT to CHI?

It’s optimal to fly from Portugal to Chicago in the morning. By choosing this option you can save up to 4% on the cost of your flight, compared to a flight at noon.

Rainfall in Chicago by month

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

Temperature in Chicago by month

If weather is an important factor for your trip to Chicago, 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 23.0 F).

Reviews of airlines servicing Chicago

Read reviews from past customers who have flown Delta, KLM and LOT from Portugal to Chicago. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,920 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

LOT

7.6

Good

1,066 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,272 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

780 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines to fly from Portugal to Chicago 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 $532. Aer Lingus flights start at $556 while deals on Turkish Airlines start at $608 one-way.
What are the most popular routes from Portugal to Chicago?
Most travelers choose Lisbon Humberto Delgado - Chicago O'Hare Intl, Lisbon Humberto Delgado - Chicago Midway or Porto - Chicago O'Hare Intl when deciding on the best route from Portugal to Chicago.
What are the cheapest flights from Portugal to Chicago?
While on average a flight from Portugal to Chicago is generally $1,545, our data shows the cheapest flight currently is $521. When looking at the most popular route, (Lisbon Humberto Delgado - Chicago O'Hare Intl), you can expect to pay $652 for that flight.
Can I find deals for flights from Portugal to Chicago that include hotel bookings?
Yes. In addition to deals on Portugal to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portugal to Chicago?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to Chicago.
Can I find deals for business class flights from Portugal to Chicago?
Yes. Cheapflights offers flight deals from Portugal to Chicago 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 Portugal to Chicago?
Currently, August is the cheapest month in which you can book a flight from Portugal to Chicago (average of $245). Flying from Portugal to Chicago in March is currently the most expensive (average of $321). 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

Merrillville

Hammond

Benton Harbor

Porter

Lansing

Valparaiso

Chesterton

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Top 4 airlines flying from Portugal to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Aer Lingus	Cheapest$579	Average$713	FlexibilityNo cancel fee	On-timeN/A
TAP AIR PORTUGAL	Cheapest$580	Average$1,005	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$650	Average$696	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$733	Average$898	FlexibilityNo cancel fee	On-time69%

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$341+ Cheap flights from Portugal to Chicago (CHI)

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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portugal to Chicago with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portugal to Chicago

Keep the following information in mind while searching for Portugal to Chicago flight deals. Data was last updated April 24, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good one-way deal

Find flight deals from Portugal to Chicago

Cheapest flights from Portugal to ChicagoExplore the most affordable flight options available from Portugal to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

Explore the most affordable flight options available from Portugal to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portugal to Chicago that are best for you.

Best time to book a flight from Portugal to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Portugal with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portugal to Chicago

What is the cheapest month to book a flight from Portugal to Chicago?

What is the cheapest time of day to fly from PT to CHI?

Find hourly flight availability from Portugal to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

Rainfall in Chicago by month

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

Temperature in Chicago by month

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

Reviews of airlines servicing Chicago

Read reviews from past customers who have flown Delta, KLM and LOT from Portugal to Chicago. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Portugal to Chicago. 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 Portugal to Chicago one-way?

What are the most popular routes from Portugal to Chicago?

What are the cheapest flights from Portugal to Chicago?

Can I find deals for flights from Portugal to Chicago that include hotel bookings?

How can I find direct flights from Portugal to Chicago?

Can I find deals for business class flights from Portugal to Chicago?

What is the cheapest month to book a flight from Portugal to Chicago?

Traveling to a place near Portugal?

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Alternative routes for Portugal to Chicago

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Portugal to Chicago

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Cheapest flights from Portugal to Chicago
Explore the most affordable flight options available from Portugal to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.