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$286+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Cheap 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 March 10, 2026.

This FlightHub deal was found by Cheapflights users on 3/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:20 pm
ORD
-
OPO
1 stop33h 40m
Scandinavian Airlines
Fri 11/275:35 pm
OPO
-
ORD
1 stop29h 10m
Scandinavian Airlines
Deal found 3/6$441
This Mytrip deal was found by Cheapflights users on 3/7. 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.
Sat 4/187:15 pm
ORD
-
OPO
1 stop16h 25m
Scandinavian Airlines
Fri 5/15:55 pm
OPO
-
ORD
1 stop28h 15m
Scandinavian Airlines
Deal found 3/7$443
This Mytrip deal was found by Cheapflights users on 3/7. 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 4/1710:25 pm
ORD
-
OPO
2 stops19h 00m
Multiple Airlines
Tue 4/217:10 am
OPO
-
ORD
2 stops17h 05m
Multiple Airlines
Deal found 3/7$500
This oojo deal was found by Cheapflights users on 3/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:00 pm
ORD
-
OPO
1 stop14h 05m
TAP AIR PORTUGAL
Wed 11/116:55 am
OPO
-
ORD
1 stop14h 05m
TAP AIR PORTUGAL
Deal found 3/10$522
This oojo deal was found by Cheapflights users on 3/7. 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.
Sun 3/229:25 pm
ORD
-
OPO
1 stop15h 40m
TAP AIR PORTUGAL
Tue 3/316:00 pm
OPO
-
ORD
1 stop28h 00m
TAP AIR PORTUGAL
Deal found 3/7$523
This Mytrip deal was found by Cheapflights users on 3/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/159:25 pm
ORD
-
OPO
1 stop31h 35m
TAP AIR PORTUGAL
Tue 3/3112:15 pm
OPO
-
ORD
1 stop33h 45m
TAP AIR PORTUGAL
Deal found 3/10$529
This oojo deal was found by Cheapflights users on 3/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/259:15 pm
ORD
-
OPO
1 stop13h 05m
TAP AIR PORTUGAL
Sun 11/85:00 am
OPO
-
ORD
1 stop16h 00m
TAP AIR PORTUGAL
Deal found 3/10$542
This oojo deal was found by Cheapflights users on 3/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:00 pm
ORD
-
OPO
1 stop11h 00m
TAP AIR PORTUGAL
Wed 4/2910:00 am
OPO
-
ORD
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 3/8$553
This oojo deal was found by Cheapflights users on 3/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:15 pm
ORD
-
OPO
1 stop33h 45m
Scandinavian Airlines
Sun 4/196:20 pm
OPO
-
ORD
1 stop27h 50m
Scandinavian Airlines
Deal found 3/6$566
This Expedia deal was found by Cheapflights users on 3/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/297:20 pm
ORD
-
OPO
2 stops33h 10m
Scandinavian Airlines
Mon 12/1411:50 am
OPO
-
ORD
1 stop34h 55m
Scandinavian Airlines
Deal found 3/10$568

Find 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 March 10, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$443
(Mytrip)

One-way from

$286
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$736
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.
Search Deals
From Chicago O'Hare Intl to Porto
Search Deals
One-way flight from Chicago O'Hare Intl to Porto
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($115 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 10, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/15

4:50 pm-6:20 pm

1 stop19h 30m

Porto

Tue 5/5

5:00 am-7:52 pm

2 stops20h 52m

$659

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 4/21

1:36 pm-3:25 pm

2 stops19h 49m

Porto

Sun 4/26

5:00 am-2:15 pm

1 stop15h 15m

$750

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 8/20

7:15 pm-5:05 pm

1 stop15h 50m

Porto

Thu 8/27

5:00 am-4:10 pm

2 stops17h 10m

$784

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/25

2:10 pm-10:30 am

2 stops15h 20m

Porto

Wed 4/1

5:00 am-9:26 pm

2 stops22h 26m

$845

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/25

2:10 pm-10:30 am

2 stops15h 20m

Porto

Thu 4/2

5:55 am-6:31 pm

2 stops18h 36m

$852

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 4/3

1:57 pm-3:25 pm

2 stops19h 28m

Porto

Fri 4/10

5:00 am-3:19 pm

2 stops16h 19m

$875

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 5/26

7:15 pm-11:00 am

1 stop33h 45m

Porto

Fri 6/5

5:55 pm-4:10 pm

1 stop28h 15m

$886

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 7/16

1:15 pm-6:55 am

1 stop11h 40m

Porto

Tue 7/21

12:15 pm-3:02 pm

2 stops32h 47m

$932
Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 5/24

6:00 pm-10:55 am

1 stop10h 55m

Porto

Thu 6/4

9:00 am-3:20 pm

1 stop12h 20m

$1,006

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 6/8

4:50 pm-10:40 am

1 stop11h 50m

Porto

Thu 7/2

5:00 am-2:15 pm

1 stop15h 15m

$1,008

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Showing 1-10 of 20 resultsSorted by cheapest first
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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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 Chicago O'Hare Intl Airport-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Chicago O'Hare Intl Airport-Porto flight deals on Cheapflights vs. Ovago 90-95% 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 Ovago the most. Ovago 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 March 6, 2026.

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, April is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Porto (average of $421). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $678). 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.

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 March 10, 2026.
Peruse reviews from past customers who have flown with KLM,United Airlines, andTAP 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.
KLM
7.8
Good
1,469 reviews

Entertainment

7.1

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,469 reviews
KLM
7.8
Good
1,469 reviews

Entertainment

7.1

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,414 reviews
KLM
7.8
Good
1,469 reviews

Entertainment

7.1

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
TAP AIR PORTUGAL
7.1
Good
2,162 reviews
KLM
7.8
Good
1,469 reviews

Entertainment

7.1

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Iberia
7.0
Good
3,133 reviews
KLM
7.8
Good
1,469 reviews

Entertainment

7.1

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6.8
Okay
7,843 reviews
KLM
7.8
Good
1,469 reviews

Entertainment

7.1

Comfort

7.6

Overall

7.8

Crew

8.4

Food

7.3

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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. 8 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 15h 50m. Fly via Delta or Scandinavian Airlines 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 $450, 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 Lufthansa - these airlines can fly you to your destination from $497 and $507, respectively. Users have found that TAP AIR PORTUGAL is 35% 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 Iberia, which is currently one of the cheapest options available, starting at $130. TAP AIR PORTUGAL flights start at $313 while deals on United Airlines start at $420 one-way.

  • 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, April is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Porto (average of $421). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $678). 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
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

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Alternative routes for O'Hare Intl to Porto

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

Top 8 airlines flying from O'Hare Intl to Porto

Discover the top 8 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$450Average$718FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$497Average$727FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$507Average$610FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$524Average$651FlexibilityNo cancel feeOn-time71%
KLMCheapest$531Average$679FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$552Average$720FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$563Average$778FlexibilityNo cancel feeOn-time70%
DeltaCheapest$638Average$715FlexibilityNo cancel feeOn-timeN/A

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