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$250+ 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
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 January 27, 2026.

This oojo deal was found by Cheapflights users on 1/25. 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 4/266:00 pm
ORD
-
OPO
1 stop19h 00m
TAP AIR PORTUGAL
Thu 5/79:15 pm
OPO
-
ORD
1 stop24h 45m
TAP AIR PORTUGAL
Deal found 1/25$371
This oojo deal was found by Cheapflights users on 1/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:00 pm
ORD
-
OPO
1 stop10h 55m
TAP AIR PORTUGAL
Sun 5/109:00 am
OPO
-
ORD
1 stop13h 00m
TAP AIR PORTUGAL
Deal found 1/27$372
This lol.travel deal was found by Cheapflights users on 1/26. 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.
Sun 2/18:25 pm
ORD
-
OPO
1 stop15h 40m
TAP AIR PORTUGAL
Sat 2/148:00 pm
OPO
-
ORD
1 stop24h 45m
TAP AIR PORTUGAL
Deal found 1/26$378
This FlightHub deal was found by Cheapflights users on 1/26. 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 4/116:15 pm
ORD
-
OPO
1 stop15h 55m
TAP AIR PORTUGAL
Fri 4/1710:00 am
OPO
-
ORD
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 1/26$388
This FlightHub deal was found by Cheapflights users on 1/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:00 pm
ORD
-
OPO
1 stop11h 00m
TAP AIR PORTUGAL
Tue 5/59:15 pm
OPO
-
ORD
1 stop24h 45m
TAP AIR PORTUGAL
Deal found 1/27$389
This Gotogate deal was found by Cheapflights users on 1/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 pm
ORD
-
OPO
1 stop15h 00m
TAP AIR PORTUGAL
Fri 5/19:00 am
OPO
-
ORD
1 stop13h 00m
TAP AIR PORTUGAL
Deal found 1/26$390
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Sun 4/266:00 pm
ORD
-
OPO
1 stop17h 00m
TAP AIR PORTUGAL
Sun 5/35:05 am
OPO
-
ORD
1 stop16h 55m
TAP AIR PORTUGAL
Deal found 1/27$399
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 4/86:00 pm
ORD
-
OPO
1 stop15h 00m
TAP AIR PORTUGAL
Tue 4/149:15 pm
OPO
-
ORD
1 stop24h 45m
TAP AIR PORTUGAL
Deal found 1/25$401
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 5/36:00 pm
ORD
-
OPO
1 stop10h 55m
TAP AIR PORTUGAL
Fri 5/1510:00 am
OPO
-
ORD
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 1/25$403
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Wed 4/296:00 pm
ORD
-
OPO
1 stop11h 00m
TAP AIR PORTUGAL
Fri 5/85:05 am
OPO
-
ORD
1 stop16h 55m
TAP AIR PORTUGAL
Deal found 1/27$404
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Sun 4/266:00 pm
ORD
-
OPO
1 stop20h 25m
TAP AIR PORTUGAL
Wed 5/69:00 am
OPO
-
ORD
1 stop13h 00m
TAP AIR PORTUGAL
Deal found 1/27$407
This oojo deal was found by Cheapflights users on 1/25. 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 5/36:00 pm
ORD
-
OPO
1 stop10h 55m
TAP AIR PORTUGAL
Sun 5/1710:00 am
OPO
-
ORD
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 1/25$472

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$371
(oojo)

One-way from

$250
(eDestinos)

Popular in

June

Cheapest in

February

Average price

$557
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. 15% potential increase in price ($127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 27, 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

O'Hare Intl

Fly to

Porto

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/5

6:00 pm-10:55 am

1 stop10h 55m

Porto

Thu 4/9

10:25 pm-4:00 pm

1 stop23h 35m

$576

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 2/24

10:36 am-10:30 am

2 stops17h 54m

Porto

Tue 3/3

5:00 am-4:41 pm

2 stops17h 41m

$591

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/5

6:00 pm-10:55 am

1 stop10h 55m

Porto

Fri 4/10

10:00 am-4:00 pm

1 stop12h 00m

$593

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/15

4:30 pm-8:05 pm

2 stops21h 35m

Porto

Wed 4/22

7:20 pm-2:15 pm

2 stops24h 55m

$603

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 4/23

8:10 pm-11:30 pm

1 stop21h 20m

Porto

Mon 4/27

10:45 am-9:40 am

1 stop28h 55m

$606

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 4/27

4:50 pm-10:15 pm

1 stop23h 25m

Porto

Mon 5/4

4:20 pm-3:10 pm

1 stop28h 50m

$610

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 2/6

8:15 pm-5:00 pm

1 stop14h 45m

Porto

Tue 2/10

8:00 pm-3:00 pm

1 stop25h 00m

$610

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 2/18

8:20 pm-9:55 am

1 stop31h 35m

Porto

Sun 2/22

10:55 am-6:25 pm

1 stop37h 30m

$625

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 4/13

2:00 pm-10:40 am

2 stops14h 40m

Porto

Sun 4/19

4:20 pm-2:30 pm

1 stop28h 10m

$635

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 3/19

7:00 am-10:30 am

2 stops22h 30m

Porto

Wed 3/25

5:00 am-3:20 pm

1 stop15h 20m

$637

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 21 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago O'Hare Intl Airport-Porto flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 January 23, 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, November is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Porto (average of $449). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $690). 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.

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

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 January 27, 2026.
Peruse reviews from past customers who have flown with KLM, United 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.
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,209 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
TAP AIR PORTUGAL
7.1
Good
2,130 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Iberia
7.0
Good
3,099 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,749 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 10h 55m. Fly via TAP AIR PORTUGAL, Delta, or Turkish 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 $462, 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 31% 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.

  • 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 $18 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 $449). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $690). 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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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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$462Average$722FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$487Average$690FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$504Average$688FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$507Average$610FlexibilityNo cancel feeOn-time76%
KLMCheapest$531Average$679FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$549Average$721FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$553Average$719FlexibilityNo cancel feeOn-time71%
SWISSCheapest$558Average$756FlexibilityNo cancel feeOn-time79%
DeltaCheapest$638Average$746FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$646Average$701FlexibilityNo cancel feeOn-time67%

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