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O'Hare Intl

$299+ 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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — ORD
may. 5 — may. 121
lun. 5/5
lun. 5/12
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 abril 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$662
(Scandinavian Airlines)

One-way from

$299
(Kiwi.com)

Popular in

April

Cheapest in

November

Average price

$1,882
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. 25% potential increase in price ($352 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($79 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 30, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 4/29. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/105:55 pmOPO - ORD
1 stop28h 15mScandinavian Airlines
lun. 10/137:15 pmORD - OPO
1 stop33h 45mScandinavian Airlines
Deal found 4/29$662
This Delta deal was found by Cheapflights users on 4/28. 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.
jue. 6/126:30 amOPO - ORD
1 stop13h 40mDelta
mar. 6/246:27 pmORD - OPO
2 stops15h 03mDelta
Deal found 4/28$689
This KLM deal was found by Cheapflights users on 4/28. 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.
jue. 5/154:20 pmOPO - ORD
1 stop27h 50mKLM
mié. 5/284:20 pmORD - OPO
1 stop23h 55mKLM
Deal found 4/28$695
This United Airlines deal was found by Cheapflights users on 4/28. 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.
vie. 6/136:00 amOPO - ORD
1 stop19h 55mUnited Airlines
lun. 6/232:26 pmORD - OPO
1 stop13h 19mUnited Airlines
Deal found 4/28$735
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/1511:00 amOPO - ORD
3 stops31h 10mMultiple Airlines
mié. 5/282:00 pmORD - OPO
2 stops14h 00mMultiple Airlines
Deal found 4/29$741
This Travelocity deal was found by Cheapflights users on 4/29. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/297:20 pmOPO - ORD
1 stop26h 35mSWISS
mar. 6/32:20 pmORD - OPO
1 stop15h 10mSWISS
Deal found 4/29$767
This Lufthansa deal was found by Cheapflights users on 4/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/86:15 amOPO - ORD
1 stop18h 00mLufthansa
dom. 10/129:40 pmORD - OPO
1 stop19h 40mLufthansa
Deal found 4/29$774
This lol.travel deal was found by Cheapflights users on 4/28. 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.
dom. 12/286:00 amOPO - ORD
2 stops21h 59mAir Canada
dom. 1/44:00 pmORD - OPO
2 stops14h 50mAir Canada
Deal found 4/28$778
This American Airlines deal was found by Cheapflights users on 4/29. 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.
vie. 10/108:15 amOPO - ORD
2 stops17h 15mAmerican Airlines
vie. 10/174:30 pmORD - OPO
1 stop13h 10mAmerican Airlines
Deal found 4/29$804
This Turkish Airlines deal was found by Cheapflights users on 4/29. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/104:50 pmOPO - ORD
1 stop31h 05mTurkish Airlines
mar. 10/147:50 pmORD - OPO
1 stop32h 15mTurkish Airlines
Deal found 4/29$840
This Austrian Airlines deal was found by Cheapflights users on 4/29. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/910:25 amOPO - ORD
2 stops38h 05mAustrian Airlines
mar. 10/144:20 pmORD - OPO
1 stop35h 15mAustrian Airlines
Deal found 4/29$870
This Iberia deal was found by Cheapflights users on 4/28. 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.
vie. 5/910:00 pmOPO - ORD
2 stops21h 50mIberia
dom. 5/2511:45 amORD - OPO
2 stops13h 50mIberia
Deal found 4/28$1,205

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 abril 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

vie. 10/10

5:55 pm-4:10 pm

1 stop28h 15m

Chicago O'Hare Intl

lun. 10/13

7:15 pm-11:00 am

1 stop33h 45m

$662

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 6/12

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

mar. 6/24

6:27 pm-3:30 pm

2 stops15h 03m

$689

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 5/15

4:20 pm-2:10 pm

1 stop27h 50m

Chicago O'Hare Intl

mié. 5/28

4:20 pm-10:15 pm

1 stop23h 55m

$695

PortoChicago

OPO - ORD

OPOORD

Porto

vie. 6/13

6:00 am-7:55 pm

1 stop19h 55m

Chicago O'Hare Intl

lun. 6/23

2:26 pm-9:45 am

1 stop13h 19m

$735

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 5/15

11:00 am-12:10 pm

3 stops31h 10m

Chicago O'Hare Intl

mié. 5/28

2:00 pm-10:00 am

2 stops14h 00m

$741

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 5/29

7:20 pm-3:55 pm

1 stop26h 35m

Chicago O'Hare Intl

mar. 6/3

2:20 pm-11:30 am

1 stop15h 10m

$767

PortoChicago

OPO - ORD

OPOORD

Porto

mié. 10/8

6:15 am-6:15 pm

1 stop18h 00m

Chicago O'Hare Intl

dom. 10/12

9:40 pm-11:20 pm

1 stop19h 40m

$774

PortoChicago

OPO - ORD

OPOORD

Porto

vie. 10/10

8:15 am-7:30 pm

2 stops17h 15m

Chicago O'Hare Intl

vie. 10/17

4:30 pm-11:40 am

1 stop13h 10m

$804

PortoChicago

OPO - ORD

OPOORD

Porto

vie. 10/10

4:50 pm-5:55 pm

1 stop31h 05m

Chicago O'Hare Intl

mar. 10/14

7:50 pm-10:05 am

1 stop32h 15m

$840

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 10/9

10:25 am-6:30 pm

2 stops38h 05m

Chicago O'Hare Intl

mar. 10/14

4:20 pm-9:35 am

1 stop35h 15m

$870

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 20 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 April.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 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.

Cheapflights Insights

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

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.

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport 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 O'Hare Intl Airport when rainfall is around 1.7 in.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, 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 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 abril 30, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from Porto to Chicago to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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 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 Scandinavian Airlines is currently your cheapest option to Chicago O'Hare Intl Airport, with prices starting at $662. Additional round-trip tickets that might be worth considering are offered by Delta and KLM, with the lowest prices starting at $689 and $696, respectively. You may be able to fly from Porto to Chicago O'Hare Intl Airport for 35% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Porto to Chicago O'Hare Intl Airport one-way?

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $570. Turkish Airlines flights start at $606 while deals on American Airlines start at $679 one-way.

  • 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

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