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O'Hare Intl

$335+ Cheap flights from Porto (OPO) to O'Hare Intl (ORD)

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — ORD
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap flight deals from Porto to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to O'Hare Intl (ORD). 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$474
(Booking.com)

One-way from

$335
(Kiwi.com)

Popular in

September

Cheapest in

February

Average price

$762
Provider with most accurate pricing for Porto-Chicago O'Hare Intl flight deals.
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Provider most trusted by Cheapflights users for Porto-Chicago O'Hare Intl flights.
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From Porto to Chicago O'Hare Intl
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One-way flight from Porto to Chicago O'Hare Intl
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Highest demand for flights based on searches. 12% potential increase in price ($124 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Porto to O'Hare Intl

Cheapest flights from Porto to O'Hare Intl
Explore the most affordable flight options available from Porto to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This Booking.com deal was found by Cheapflights users on 10/26. 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.
Fri 11/145:35 pmOPO - ORD
1 stop29h 10mScandinavian Airlines
Thu 11/277:20 pmORD - OPO
1 stop15h 35mScandinavian Airlines
Deal found 10/26$474
This KLM deal was found by Cheapflights users on 10/27. 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 11/246:30 amOPO - ORD
1 stop13h 50mKLM
Mon 12/15:20 pmORD - OPO
1 stop11h 10mKLM
Deal found 10/27$763
This Air France deal was found by Cheapflights users on 10/26. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/134:10 pmOPO - ORD
1 stop28h 10mMultiple Airlines
Mon 11/175:20 pmORD - OPO
1 stop11h 10mMultiple Airlines
Deal found 10/26$764
This Delta deal was found by Cheapflights users on 10/26. 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.
Fri 11/146:30 amOPO - ORD
1 stop13h 50mDelta
Thu 11/277:45 amORD - OPO
2 stops20h 40mDelta
Deal found 10/26$765
This Delta deal was found by Cheapflights users on 10/27. 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.
Thu 11/136:35 amOPO - ORD
2 stops19h 54mDelta
Mon 11/1710:35 amORD - OPO
2 stops17h 55mDelta
Deal found 10/27$771
This KLM deal was found by Cheapflights users on 10/26. 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 11/246:30 amOPO - ORD
2 stops17h 41mMultiple Airlines
Mon 12/12:35 pmORD - OPO
2 stops13h 55mMultiple Airlines
Deal found 10/26$775

Cheapflights Fare Finder

 
Customize your flight search to find flights from Porto to O'Hare Intl 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 28, 2025.
Use the filters below to find and compare flights from Porto to Chicago O'Hare Intl Airport that are best for you.

Fly from

Porto

Fly to

O'Hare Intl

Route

Depart

Return

Price

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Mon 12/1

2:35 pm-10:30 am

2 stops13h 55m

$763

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Mon 12/1

5:20 pm-10:30 am

1 stop11h 10m

$763

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/13

4:10 pm-2:20 pm

1 stop28h 10m

Chicago O'Hare Intl

Mon 11/17

5:20 pm-10:30 am

1 stop11h 10m

$764

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 11/14

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Thu 11/27

7:45 am-10:25 am

2 stops20h 40m

$765

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/13

6:35 am-9:55 pm

2 stops21h 20m

Chicago O'Hare Intl

Mon 11/17

10:35 am-10:30 am

2 stops17h 55m

$771

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 12/10

2:45 pm-2:57 pm

2 stops54h 12m

$335

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 12/11

9:55 pm-3:25 pm

2 stops23h 30m

$360

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 12/2

9:55 pm-3:00 pm

2 stops23h 05m

$369

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 11/18

8:25 am-3:00 pm

2 stops36h 35m

$385

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/20

7:20 pm-5:59 pm

2 stops28h 39m

$393

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 13 results
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Compare providers for flights from Porto to O'Hare Intl

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 O'Hare Intl in October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 O'Hare Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Porto-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Porto-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Porto-Chicago O'Hare Intl Airport flights, Cheapflights users trust eDreams the most. eDreams 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 O'Hare Intl Airport 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 O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl 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.

Related info for your journey

Find useful and relevant information for your journey from Porto to O'Hare Intl. 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 O'Hare Intl?

    If you book a flight to Chicago O'Hare Intl from Porto, you will be flying from Porto, which is the city’s only airport. Porto (OPO) is located 6.8 mi from the center of Porto. There are 0 flights from Porto to Chicago O'Hare Intl per day from 0 different airlines.

  • How long is the flight from Porto to Chicago O'Hare Intl Airport?

    There are many flights that can get you from Porto to Chicago O'Hare Intl Airport in 13h 50m. Fly via KLM to get the fastest option. Airlines will cover a distance of 3931 mi.

  • Can I find deals for flights from Porto to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Porto to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Porto to O'Hare Intl?

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

  • Can I find deals for business class flights from Porto to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Porto to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Schaumburg
Rosemont
Skokie
Des Plaines
Gurnee
Hoffman Estates
Elgin
Oak Brook
Elk Grove Village
Beloit
Rockford
Naperville
Racine
Downers Grove
Orland Park
Merrillville
Bridgeview
Warrenville
Joliet
Waukegan

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