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O'Hare Intl

$300+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$472
(lol.travel)

One-way from

$300
(Kiwi.com)

Popular in

July

Cheapest in

March

Average price

$817
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. 16% potential increase in price ($163 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This lol.travel deal was found by Cheapflights users on 9/10. 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.
Fri 10/315:45 pmOPO - ORD
1 stop29h 00mScandinavian Airlines
Thu 11/137:20 pmORD - OPO
1 stop15h 35mScandinavian Airlines
Deal found 9/10$472
This Mytrip deal was found by Cheapflights users on 9/11. 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.
Wed 10/227:10 amOPO - ORD
2 stops35h 25mMultiple Airlines
Sun 11/28:25 pmORD - OPO
2 stops20h 35mMultiple Airlines
Deal found 9/11$550
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/219:15 pmOPO - ORD
1 stop24h 55mTAP AIR PORTUGAL
Sun 11/28:25 pmORD - OPO
1 stop19h 35mTAP AIR PORTUGAL
Deal found 9/11$561
This Mytrip deal was found by Cheapflights users on 9/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2411:30 amOPO - ORD
2 stops35h 00mMultiple Airlines
Fri 10/319:15 pmORD - OPO
2 stops19h 10mMultiple Airlines
Deal found 9/8$566
This Mytrip deal was found by Cheapflights users on 9/11. 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.
Tue 10/216:35 pmOPO - ORD
2 stops27h 35mMultiple Airlines
Sun 11/28:25 pmORD - OPO
2 stops20h 35mMultiple Airlines
Deal found 9/11$620

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 September 11, 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

Wed 10/22

6:00 pm-12:35 pm

1 stop24h 35m

Chicago O'Hare Intl

Sun 11/2

8:25 pm-7:00 pm

1 stop16h 35m

$561

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/24

11:30 am-4:30 pm

2 stops35h 00m

Chicago O'Hare Intl

Fri 10/31

9:15 pm-9:25 pm

2 stops19h 10m

$566

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 10/21

6:35 pm-4:10 pm

2 stops27h 35m

Chicago O'Hare Intl

Sun 11/2

8:25 pm-11:00 pm

2 stops20h 35m

$620

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 10/22

3:45 pm-12:35 pm

2 stops26h 50m

Chicago O'Hare Intl

Sun 11/2

8:25 pm-8:10 am

3 stops29h 45m

$636

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/13

1:00 pm-3:15 pm

2 stops32h 15m

Chicago O'Hare Intl

Fri 11/28

8:15 pm-3:55 pm

1 stop13h 40m

$636

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/31

5:45 pm-9:39 pm

2 stops32h 54m

Chicago O'Hare Intl

Thu 11/13

7:20 pm-4:55 pm

1 stop15h 35m

$661

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

8:20 am-2:30 pm

1 stop12h 10m

Chicago O'Hare Intl

Mon 12/1

6:25 pm-4:00 pm

2 stops15h 35m

$686

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 10/1

5:40 pm-12:35 pm

2 stops24h 55m

Chicago O'Hare Intl

Mon 10/6

6:00 am-8:00 am

3 stops44h 00m

$695

PortoChicago

OPO - ORD

OPOORD

Porto

Sun 1/11

8:45 am-3:55 pm

2 stops37h 10m

$301

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 1/27

9:55 pm-3:55 pm

2 stops48h 00m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 15 results
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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 24h 35m. Fly via TAP AIR PORTUGAL 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.

  • What is the cheapest month to book a flight from Porto to Chicago O'Hare Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Porto to Chicago O'Hare Intl Airport (average of $245). Flying from Porto to Chicago O'Hare Intl Airport 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

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
Gurnee
Hoffman Estates
Des Plaines
Elgin
Arlington Heights
Beloit
Racine
Rockford
Orland Park
Oak Brook
Downers Grove
Naperville
Elk Grove Village
Evanston
Merrillville
Bridgeview
Warrenville

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