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O'Hare Intl

$391+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — ORD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$542
(lol.travel)

One-way from

$391
(Kiwi.com)

Popular in

March

Cheapest in

November

Average price

$1,094
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. 11% potential increase in price ($120 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This lol.travel deal was found by Cheapflights users on 7/30. 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 9/189:15 pmOPO - ORD
1 stop25h 15mTAP AIR PORTUGAL
Thu 10/26:00 pmORD - OPO
1 stop17h 00mTAP AIR PORTUGAL
Deal found 7/30$542
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Thu 8/284:55 pmOPO - ORD
2 stops29h 15mMultiple Airlines
Sun 9/286:00 pmORD - OPO
2 stops22h 35mMultiple Airlines
Deal found 7/30$674
This Delta deal was found by Cheapflights users on 7/30. 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 9/186:30 amOPO - ORD
1 stop13h 40mDelta
Thu 10/26:28 pmORD - OPO
2 stops15h 02mDelta
Deal found 7/30$677
This KLM deal was found by Cheapflights users on 7/29. 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 9/186:30 amOPO - ORD
1 stop13h 40mKLM
Thu 10/25:10 pmORD - OPO
1 stop16h 20mKLM
Deal found 7/29$683
This Iberia deal was found by Cheapflights users on 7/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/278:15 amOPO - ORD
1 stop12h 00mIberia
Fri 9/264:30 pmORD - OPO
1 stop21h 25mIberia
Deal found 7/30$687
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Thu 9/188:15 amOPO - ORD
1 stop12h 00mAmerican Airlines
Thu 10/24:30 pmORD - OPO
1 stop13h 10mAmerican Airlines
Deal found 7/29$692
This lol.travel deal was found by Cheapflights users on 7/30. 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 8/225:55 pmOPO - ORD
1 stop28h 15mScandinavian Airlines
Mon 8/257:15 pmORD - OPO
1 stop33h 45mScandinavian Airlines
Deal found 7/30$795
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Mon 10/2712:35 pmOPO - ORD
2 stops16h 08mUnited Airlines
Mon 11/32:00 pmORD - OPO
2 stops13h 30mUnited Airlines
Deal found 7/30$812
This Turkish Airlines deal was found by Cheapflights users on 7/30. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/274:10 pmOPO - ORD
1 stop23h 55mTurkish Airlines
Sat 11/112:50 pmORD - OPO
1 stop21h 20mTurkish Airlines
Deal found 7/30$852
This British Airways deal was found by Cheapflights users on 7/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/188:15 amOPO - ORD
2 stops17h 18mBritish Airways
Thu 10/210:35 pmORD - OPO
1 stop15h 45mBritish Airways
Deal found 7/29$855
This SWISS deal was found by Cheapflights users on 7/29. 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.
Fri 9/128:40 amOPO - ORD
1 stop13h 15mSWISS
Fri 9/197:05 pmORD - OPO
2 stops36h 40mSWISS
Deal found 7/29$877

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 July 30, 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 9/18

9:15 pm-4:30 pm

1 stop25h 15m

Chicago O'Hare Intl

Thu 10/2

6:00 pm-5:00 pm

1 stop17h 00m

$542

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 11/21

11:30 am-4:45 pm

2 stops35h 15m

Chicago O'Hare Intl

Sat 11/29

7:20 pm-6:50 am

3 stops29h 30m

$598

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/18

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

Thu 10/2

6:28 pm-3:30 pm

2 stops15h 02m

$677

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/18

6:30 am-5:59 pm

2 stops17h 29m

Chicago O'Hare Intl

Thu 10/2

5:10 pm-3:30 pm

1 stop16h 20m

$688

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/18

8:15 am-2:15 pm

1 stop12h 00m

Chicago O'Hare Intl

Thu 10/2

4:30 pm-11:40 am

1 stop13h 10m

$692

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 9/13

8:15 am-7:45 pm

2 stops17h 30m

Chicago O'Hare Intl

Sat 9/20

4:30 pm-11:40 am

1 stop13h 10m

$698

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 12/13

7:50 pm-6:45 pm

1 stop28h 55m

Chicago O'Hare Intl

Tue 12/30

9:45 pm-5:35 pm

1 stop13h 50m

$716

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 8/27

1:10 pm-12:50 pm

2 stops29h 40m

$391

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 10/15

9:15 pm-12:35 pm

1 stop21h 20m

$475

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 9/1

10:55 am-9:40 am

1 stop28h 45m

$621

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 12 results
1
2

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.

Cheapflights Insights

Everything you need to know about your flight from Porto to Chicago O'Hare Intl Airport

How much does it cost to fly round-trip from Porto to Chicago O'Hare Intl Airport?

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated July 30, 2025.
Read reviews from past customers who have flown Delta, KLM, and Austrian Airlines from Porto to Chicago O'Hare Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • What are the cheapest airlines flying from Porto to Chicago O'Hare Intl Airport round-trip?

    Flying on TAP AIR PORTUGAL is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at $542. Additional round-trip tickets that might be worth considering are offered by Delta and KLM, with the lowest prices starting at $677 and $688, respectively. You may be able to fly from Porto to Chicago O'Hare Intl Airport for 43% less than the average price by searching for these airlines.

  • 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
Beloit
Hoffman Estates
Skokie
Naperville
Des Plaines
Elgin
Arlington Heights
Elk Grove Village
Racine
Rockford
Tinley Park
Orland Park
Merrillville
Downers Grove
Evanston
Lake Geneva
Gurnee
Joliet

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