HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
O'Hare Intl

$346+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — ORD
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Porto to O'Hare Intl with Cheapflights

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”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$553
(lol.travel)

One-way from

$346
(Kiwi.com)

Popular in

September

Cheapest in

February

Average price

$854
Provider with most accurate pricing for Porto-Chicago O'Hare Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Chicago O'Hare Intl flights.
Search Deals
From Porto to Chicago O'Hare Intl
Search Deals
One-way flight from Porto to Chicago O'Hare Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 6, 2025.

This lol.travel deal was found by Cheapflights users on 11/5. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/208:00 pmOPO - ORD
1 stop25h 25mTAP AIR PORTUGAL
Wed 12/37:10 pmORD - OPO
1 stop11h 55mTAP AIR PORTUGAL
Deal found 11/5$553
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:35 amOPO - ORD
1 stop14h 20mMultiple Airlines
Wed 12/35:40 pmORD - OPO
1 stop15h 35mMultiple Airlines
Deal found 11/6$666
This lol.travel deal was found by Cheapflights users on 11/5. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:00 amOPO - ORD
2 stops31h 56mAir Canada
Wed 12/312:50 pmORD - OPO
2 stops16h 50mAir Canada
Deal found 11/5$756
This KLM deal was found by Cheapflights users on 11/5. 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 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 50mMultiple Airlines
Mon 12/12:35 pmORD - OPO
2 stops13h 55mMultiple Airlines
Deal found 11/5$767
This KLM deal was found by Cheapflights users on 11/6. 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.
Thu 11/134:10 pmOPO - ORD
1 stop28h 10mKLM
Mon 11/175:20 pmORD - OPO
1 stop11h 10mKLM
Deal found 11/6$769
This Delta deal was found by Cheapflights users on 11/6. 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.
Thu 11/136:35 amOPO - ORD
2 stops17h 38mDelta
Mon 11/172:35 pmORD - OPO
2 stops13h 55mDelta
Deal found 11/6$774
This KLM deal was found by Cheapflights users on 11/5. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:15 amOPO - ORD
1 stop33h 05mMultiple Airlines
Mon 11/172:35 pmORD - OPO
2 stops13h 55mMultiple Airlines
Deal found 11/5$775
This United Airlines deal was found by Cheapflights users on 11/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:00 amOPO - ORD
1 stop15h 20mUnited Airlines
Wed 12/33:20 pmORD - OPO
1 stop14h 20mUnited Airlines
Deal found 11/5$784

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 November 6, 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

Thu 11/20

8:00 pm-3:25 pm

1 stop25h 25m

Chicago O'Hare Intl

Wed 12/3

7:10 pm-1:05 pm

1 stop11h 55m

$553

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 1/30

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Sun 2/8

10:35 am-10:30 am

2 stops17h 55m

$734

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 2/9

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Mon 2/16

10:36 am-10:30 am

2 stops17h 54m

$734

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 2/10

4:10 pm-2:20 pm

1 stop28h 10m

Chicago O'Hare Intl

Mon 2/16

5:20 pm-10:30 am

1 stop11h 10m

$735

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 2/11

6:00 am-2:20 pm

1 stop14h 20m

Chicago O'Hare Intl

Mon 2/16

12:32 pm-10:30 am

2 stops15h 58m

$739

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 1/30

4:10 pm-2:20 pm

1 stop28h 10m

Chicago O'Hare Intl

Sat 2/7

1:58 pm-10:30 am

2 stops14h 32m

$739

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 1/31

6:00 am-2:20 pm

1 stop14h 20m

Chicago O'Hare Intl

Sat 2/7

1:58 pm-10:30 am

2 stops14h 32m

$739

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 2/11

6:00 am-9:04 pm

2 stops21h 04m

Chicago O'Hare Intl

Wed 2/18

10:35 am-10:30 am

2 stops17h 55m

$740

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 2/10

6:05 am-9:04 pm

2 stops20h 59m

Chicago O'Hare Intl

Tue 2/17

5:20 pm-10:30 am

1 stop11h 10m

$740

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 2/11

11:15 am-10:29 pm

2 stops17h 14m

Chicago O'Hare Intl

Tue 2/17

5:37 pm-3:25 pm

2 stops15h 48m

$755

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 15 results
1
2

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 November.
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 TAP AIR PORTUGAL, Delta, or KLM to get the fastest option. Airlines will cover a distance of 3931 mi. This flight may include one or multiple stops.

  • 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
Beloit
Delavan
Elgin
Oak Brook
Elk Grove Village
Downers Grove
Rockford
Naperville
Orland Park
Bridgeview
Warrenville
Waukegan
Aurora
Racine

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Porto to O'Hare Intl

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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.