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$389+ Cheap flights from O'Hare Intl (ORD) to Porto (OPO)

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Porto are usually found in February or December, booked 77 days in advance, depart on a Friday or Sunday and return on a Thursday

Cheap flight deals from O'Hare Intl to Porto

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Porto (OPO). 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 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$413
(FlightHub)

One-way from

$389
(FlightHub)

Popular in

June

Cheapest in

February

Average price

$616
Provider with most accurate pricing for Chicago O'Hare Intl-Porto flight deals.
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Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Porto flights.
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From Chicago O'Hare Intl to Porto
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One-way flight from Chicago O'Hare Intl to Porto
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Highest demand for flights based on searches. 17% potential increase in price ($137 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($22 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 O'Hare Intl to Porto

Cheapest flights from O'Hare Intl to Porto
Explore the most affordable flight options available from O'Hare Intl to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2025.

This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:10 pmORD - OPO
1 stop13h 55mTAP AIR PORTUGAL
Wed 11/198:55 amOPO - ORD
1 stop12h 05mTAP AIR PORTUGAL
Deal found 10/28$413
This oojo deal was found by Cheapflights users on 10/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:10 pmORD - OPO
1 stop16h 50mTAP AIR PORTUGAL
Thu 11/208:00 pmOPO - ORD
1 stop25h 25mTAP AIR PORTUGAL
Deal found 10/29$426
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/129:50 pmORD - OPO
1 stop19h 50mLufthansa
Fri 11/2112:30 pmOPO - ORD
1 stop13h 35mLufthansa
Deal found 10/29$435
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:50 pmORD - OPO
1 stop34h 25mMultiple Airlines
Tue 12/166:00 amOPO - ORD
1 stop13h 10mMultiple Airlines
Deal found 10/27$449
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:05 amORD - OPO
2 stops22h 10mMultiple Airlines
Thu 12/116:00 amOPO - ORD
1 stop13h 10mMultiple Airlines
Deal found 10/28$455
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:50 pmORD - OPO
1 stop34h 25mMultiple Airlines
Tue 11/181:45 pmOPO - ORD
1 stop34h 40mMultiple Airlines
Deal found 10/28$457
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Tue 12/27:05 amORD - OPO
2 stops22h 10mMultiple Airlines
Tue 12/96:00 amOPO - ORD
1 stop13h 10mMultiple Airlines
Deal found 10/29$460
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:50 pmORD - OPO
1 stop34h 25mSWISS
Thu 12/117:25 pmOPO - ORD
1 stop26h 55mSWISS
Deal found 10/28$461
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:50 pmORD - OPO
1 stop34h 25mSWISS
Thu 11/2012:05 pmOPO - ORD
1 stop34h 15mSWISS
Deal found 10/28$462
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:50 pmORD - OPO
1 stop34h 25mSWISS
Tue 12/912:05 pmOPO - ORD
1 stop34h 15mSWISS
Deal found 10/29$463
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:25 pmORD - OPO
1 stop10h 35mTAP AIR PORTUGAL
Fri 11/219:00 amOPO - ORD
1 stop12h 25mTAP AIR PORTUGAL
Deal found 10/28$466

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl to Porto 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 29, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Porto that are best for you.

Fly from

O'Hare Intl

Fly to

Porto

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

1:00 pm-9:30 am

2 stops14h 30m

Porto

Thu 11/20

6:00 am-1:10 pm

1 stop13h 10m

$478

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

1:00 pm-9:30 am

2 stops14h 30m

Porto

Fri 11/21

6:00 am-8:05 pm

1 stop20h 05m

$478

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 11/11

1:00 pm-9:30 am

2 stops14h 30m

Porto

Fri 11/21

6:00 am-8:05 pm

1 stop20h 05m

$478

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

10:35 am-10:30 am

2 stops17h 55m

Porto

Wed 11/19

6:00 am-2:20 pm

1 stop14h 20m

$482

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

2:35 pm-10:30 am

2 stops13h 55m

Porto

Wed 11/19

6:00 am-7:23 pm

2 stops19h 23m

$492

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 11/11

10:35 am-10:30 am

2 stops17h 55m

Porto

Tue 11/18

6:05 am-6:11 pm

2 stops18h 06m

$492

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

1:25 pm-10:30 am

2 stops15h 05m

Porto

Thu 11/20

6:35 am-8:06 am

2 stops31h 31m

$492

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

5:20 pm-10:30 am

1 stop11h 10m

Porto

Tue 11/18

11:25 am-7:55 am

2 stops26h 30m

$493

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/26

1:00 pm-9:30 am

2 stops14h 30m

Porto

Tue 12/2

12:30 pm-1:10 pm

1 stop30h 40m

$497

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

7:10 pm-1:05 pm

1 stop11h 55m

$389

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 20 results
1
2

Compare providers for flights from O'Hare Intl to Porto

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 O'Hare Intl to Porto in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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 Chicago O'Hare Intl Airport-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Chicago O'Hare Intl Airport-Porto flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Chicago O'Hare Intl Airport-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago O'Hare Intl Airport-Porto 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 Chicago O'Hare Intl Airport-Porto 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 O'Hare Intl to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from O'Hare Intl 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 Chicago O'Hare Intl Airport to Porto

How far ahead should I book a flight from Chicago O'Hare Intl Airport to Porto?

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Porto. Price data was last updated on October 24, 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Porto is 77 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Porto (average of $438). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $695). 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.

What is the cheapest time of day to fly from ORD to OPO?

Find hourly flight availability from O'Hare Intl to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to Porto in the evening. Doing so could potentially save you 33% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Porto?

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Porto flight should consider departing on Wednesday evenings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated October 29, 2025.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and TAP AIR PORTUGAL from Chicago O'Hare Intl Airport to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,030 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
TAP AIR PORTUGAL
7.1
Good
2,037 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Iberia
7.0
Good
3,001 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,541 reviews
United Airlines
7.4
Good
8,998 reviews

Crew

8.1

Overall

7.4

Food

6.6

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

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

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly into when you book flights from Chicago O'Hare Intl to Porto. 10 airlines have flights to Porto from Chicago O'Hare Intl on a regular basis. Booking flights from Chicago O'Hare Intl to Porto should not be difficult; the airport handles an average of 0 inbound flights from Chicago O'Hare Intl per day.

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

    There are many flights that can get you from Chicago O'Hare Intl Airport to Porto in 14h 30m. Fly via United Airlines or Delta to get the fastest option. Chicago O'Hare Intl Airport and Porto are separated by a distance of 3931 mi. This flight may include one or multiple stops.

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

    Currently priced at $464, TAP AIR PORTUGAL will fly you from Chicago O'Hare Intl Airport to Porto and back. In addition to TAP AIR PORTUGAL, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Iberia and British Airways - these airlines can fly you to your destination from $487 and $504, respectively. Users have found that TAP AIR PORTUGAL is 30% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Porto 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 $389. United Airlines flights start at $399 while deals on Air Canada start at $402 one-way.

  • Where are the most common layover locations when flying from Chicago O'Hare Intl Airport to Porto?

    Of the flights from Chicago O'Hare Intl Airport to Porto that have layovers, most of them stop in Lisbon.

  • What are some popular things to do or see while on a layover in Lisbon?

    If you're on a layover in Lisbon and looking for things to do, consider visiting Chiado, Praça do Marquês de Pombal, or Londres. Travelers on a layover in Lisbon can visit Chiado, Praça do Marquês de Pombal, and Londres, by traveling 4.5 mi, 3.6 mi, and 2.3 mi, respectively after landing at Lisbon Humberto Delgado. Travelers can book a car rental at Lisbon Humberto Delgado for about $20 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Chicago O'Hare Intl Airport to Porto flights?

    Chicago O'Hare Intl Airport to Porto flights have a layover in Madrid the least frequently.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from O'Hare Intl to Porto 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 Chicago O'Hare Intl Airport to Porto?

    Currently, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Porto (average of $438). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $695). 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 Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra

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Top 10 airlines flying from O'Hare Intl to Porto

Discover the top 10 airlines that operate flights from O'Hare Intl to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$464Average$691FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$487Average$727FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$504Average$736FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$526Average$637FlexibilityNo cancel feeOn-time76%
KLMCheapest$531Average$680FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$545Average$723FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$554Average$719FlexibilityNo cancel feeOn-time71%
SWISSCheapest$558Average$756FlexibilityNo cancel feeOn-time79%
DeltaCheapest$638Average$841FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$646Average$732FlexibilityNo cancel feeOn-time67%

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