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$319+ Cheap flights from Porto (OPO) 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — CHI
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Porto to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$536
(Mytrip)

One-way from

$319
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$922
Provider with most accurate pricing for Porto-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Porto-Chicago (CHI) flights.
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From Porto to Chicago (CHI)
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One-way flight from Porto to Chicago (CHI)
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High demand for flights, 16% potential price rise
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Best time to find cheap flights, 2% potential price drop
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Average for round-trip flights in January 2025
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Find flight deals from Porto to Chicago

Cheapest flights from Porto to Chicago
Explore the most affordable flight options available from Porto to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Mytrip deal was found by Cheapflights users on 1/20. 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 3/35:55 pmOPO - ORD
3 stops28h 20mMultiple Airlines
Mon 3/1010:25 pmORD - OPO
2 stops15h 55mMultiple Airlines
Deal found 1/20$536
This Delta deal was found by Cheapflights users on 1/19. 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 2/36:20 amOPO - ORD
1 stop14h 10mDelta
Wed 2/1910:10 amORD - OPO
2 stops18h 40mDelta
Deal found 1/19$606
This KLM deal was found by Cheapflights users on 1/20. 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.
Mon 11/245:00 amOPO - ORD
1 stop15h 30mKLM
Mon 12/11:35 pmORD - OPO
2 stops15h 15mKLM
Deal found 1/20$610
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Mon 2/38:20 amOPO - ORD
1 stop12h 10mAmerican Airlines
Wed 2/1911:45 amORD - OPO
2 stops13h 55mAmerican Airlines
Deal found 1/20$616
This Booking.com deal was found by Cheapflights users on 1/20. 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.
Thu 4/2410:25 pmOPO - ORD
1 stop23h 35mTAP AIR PORTUGAL
Fri 5/25:55 pmORD - OPO
1 stop10h 40mTAP AIR PORTUGAL
Deal found 1/20$664
This Lufthansa deal was found by Cheapflights users on 1/20. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/136:00 amOPO - ORD
1 stop19h 55mLufthansa
Mon 6/2310:30 pmORD - OPO
1 stop18h 20mLufthansa
Deal found 1/20$724
This Air Canada deal was found by Cheapflights users on 1/20. 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.
Thu 6/1212:15 pmOPO - ORD
1 stop27h 37mAir Canada
Tue 6/241:40 pmORD - OPO
2 stops15h 35mAir Canada
Deal found 1/20$738
This Brussels Airlines deal was found by Cheapflights users on 1/20. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/114:50 pmOPO - ORD
2 stops24h 50mBrussels Airlines
Mon 4/216:05 pmORD - OPO
2 stops15h 55mBrussels Airlines
Deal found 1/20$852
This SWISS deal was found by Cheapflights users on 1/20. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/247:20 pmOPO - ORD
1 stop22h 50mSWISS
Fri 5/24:05 pmORD - OPO
2 stops20h 25mSWISS
Deal found 1/20$855
This United Airlines deal was found by Cheapflights users on 1/20. 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 6/299:00 amOPO - ORD
2 stops18h 45mUnited Airlines
Sun 7/63:00 pmORD - OPO
2 stops12h 45mUnited Airlines
Deal found 1/20$1,147

Find flights from Porto to Chicago within your budget

Customize your flight search to find flights from Porto to Chicago 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 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 3/3

5:55 pm-4:15 pm

3 stops28h 20m

Chicago O'Hare Intl

Mon 3/10

10:25 pm-7:20 pm

2 stops15h 55m

$536

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 2/3

6:20 am-2:30 pm

1 stop14h 10m

Chicago O'Hare Intl

Wed 2/19

10:10 am-10:50 am

2 stops18h 40m

$606

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 5/3

6:40 am-2:10 pm

1 stop13h 30m

Chicago O'Hare Intl

Sat 5/10

5:15 pm-3:30 pm

1 stop16h 15m

$613

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 2/3

8:20 am-2:30 pm

1 stop12h 10m

Chicago O'Hare Intl

Wed 2/19

11:45 am-7:40 am

2 stops13h 55m

$616

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/24

10:25 pm-4:00 pm

1 stop23h 35m

Chicago O'Hare Intl

Fri 5/2

5:55 pm-10:35 am

1 stop10h 40m

$664

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 6/13

6:00 am-7:55 pm

1 stop19h 55m

Chicago O'Hare Intl

Mon 6/23

10:30 pm-10:50 pm

1 stop18h 20m

$724

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 6/12

12:15 pm-9:52 am

1 stop27h 37m

Chicago O'Hare Intl

Tue 6/24

1:40 pm-11:15 am

2 stops15h 35m

$738

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 4/11

4:50 pm-11:40 am

2 stops24h 50m

Chicago O'Hare Intl

Mon 4/21

6:05 pm-4:00 pm

2 stops15h 55m

$852

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/24

7:20 pm-12:10 pm

1 stop22h 50m

Chicago O'Hare Intl

Fri 5/2

4:05 pm-6:30 pm

2 stops20h 25m

$855

PortoChicago

OPO - ORD

OPOORD

Porto

Sun 6/29

9:00 am-9:45 pm

2 stops18h 45m

Chicago O'Hare Intl

Sun 7/6

3:00 pm-9:45 am

2 stops12h 45m

$1,147

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 19 results
1
2

Compare providers for flights from Porto to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Porto to Chicago in January.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Porto-Chicago flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Porto-Chicago flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Porto-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Porto-Chicago flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Porto-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Porto to Chicago

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

Travel insights for flights from Porto to Chicago

Get recent, data-driven insights about flights from Porto to Chicago including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Porto to Chicago (average of $245). Flying from Porto to Chicago in March is currently the most expensive (average of $320). 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.

Rainfall in Chicago by month

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

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

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated January 21, 2025.
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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

SWISS
7.5
Good
1,599 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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

United Airlines
7.4
Good
8,982 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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

Turkish Airlines
7.3
Good
3,931 reviews
Delta
8.0
Very good
8,521 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.6

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

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

Related info for your journey

Find useful and relevant information for your journey from Porto to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Porto to Chicago?

    Located just 6.8 mi from the city center, Porto is the airport most travelers will use when flying to Chicago from Porto. Booking flights from Porto (OPO) to Chicago should be relatively easy as there are 0 daily outbound flights to Chicago from 1 airline.

  • What are the cheapest airlines flying from Porto to Chicago round-trip?

    Currently priced at $606, Delta will fly you from Porto to Chicago and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and American Airlines - these airlines can fly you to your destination from $613 and $616, respectively. These flights start at 28% lower than the current average price 3 months from now.

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

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $526. Users have also found prices from $555 and $587 on Turkish Airlines and Air Serbia, respectively.

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

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

  • How can I find direct flights from Porto to Chicago?

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

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

    Yes. Cheapflights offers flight deals from Porto 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 Porto to Chicago?

    Currently, August is the cheapest month in which you can book a flight from Porto to Chicago (average of $245). Flying from Porto to Chicago in March is currently the most expensive (average of $320). 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

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Porter
Lansing
Valparaiso
Chesterton

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Alternative routes for Porto to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
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Porto to O'Hare Intl flights
Porto to St. Louis flights
Faro to O'Hare Intl flights
Lisbon to St. Louis flights

Top airline flying from Porto to Chicago

Discover the top airline that operate flights from Porto to Chicago. 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 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$846Average$879FlexibilityNo cancel feeOn-time69%
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