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$326+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
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 July 27, 2026.

This Gotogate deal was found by Cheapflights users on 7/22. 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.
Sun 8/96:00 pm
ORD
-
OPO
1 stop17h 00m
TAP AIR PORTUGAL
Tue 8/2510:30 pm
OPO
-
ORD
1 stop22h 15m
TAP AIR PORTUGAL
Deal found 7/22$615
This Gotogate deal was found by Cheapflights users on 7/23. 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.
Sat 10/106:05 pm
ORD
-
OPO
1 stop24h 35m
TAP AIR PORTUGAL
Wed 10/2110:00 am
OPO
-
ORD
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 7/23$624
This oojo deal was found by Cheapflights users on 7/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm
ORD
-
OPO
1 stop15h 50m
TAP AIR PORTUGAL
Sun 11/87:00 am
OPO
-
ORD
1 stop14h 30m
TAP AIR PORTUGAL
Deal found 7/26$626
This oojo deal was found by Cheapflights users on 7/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 pm
ORD
-
OPO
1 stop15h 00m
TAP AIR PORTUGAL
Wed 10/75:05 am
OPO
-
ORD
1 stop16h 55m
TAP AIR PORTUGAL
Deal found 7/26$628
This Gotogate deal was found by Cheapflights users on 7/25. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 pm
ORD
-
OPO
1 stop15h 00m
TAP AIR PORTUGAL
Wed 9/3010:30 pm
OPO
-
ORD
1 stop20h 10m
TAP AIR PORTUGAL
Deal found 7/25$633
This Trip.com deal was found by Cheapflights users on 7/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:00 pm
ORD
-
OPO
1 stop23h 30m
TAP AIR PORTUGAL
Wed 11/187:00 am
OPO
-
ORD
1 stop14h 30m
TAP AIR PORTUGAL
Deal found 7/22$636
This Justfly.com deal was found by Cheapflights users on 7/24. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:05 pm
ORD
-
OPO
1 stop14h 55m
TAP AIR PORTUGAL
Wed 10/710:00 am
OPO
-
ORD
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 7/24$638
This oojo deal was found by Cheapflights users on 7/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:00 pm
ORD
-
OPO
1 stop20h 25m
TAP AIR PORTUGAL
Wed 10/147:00 am
OPO
-
ORD
1 stop15h 00m
TAP AIR PORTUGAL
Deal found 7/26$640
This Mytrip deal was found by Cheapflights users on 7/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 pm
ORD
-
OPO
2 stops23h 50m
Multiple Airlines
Wed 9/307:10 am
OPO
-
ORD
2 stops35h 30m
Multiple Airlines
Deal found 7/25$642
This Mytrip deal was found by Cheapflights users on 7/24. 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 9/186:00 pm
ORD
-
OPO
2 stops23h 00m
Multiple Airlines
Wed 9/307:10 am
OPO
-
ORD
2 stops35h 30m
Multiple Airlines
Deal found 7/24$643

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 July 27, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$620
(Rumbo)

One-way from

$326
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,063
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. 22% potential increase in price ($232 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 9/12

8:10 pm-3:50 pm

1 stop37h 40m

Porto

Tue 9/15

10:40 am-9:40 am

1 stop29h 00m

$861

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 10/24

7:30 am-5:45 pm

2 stops28h 15m

Porto

Fri 10/30

5:45 pm-9:33 pm

2 stops32h 48m

$880

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/7

1:50 pm-10:40 am

2 stops14h 50m

Porto

Wed 10/14

5:00 am-2:36 pm

2 stops15h 36m

$963

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/20

3:05 pm-3:30 pm

2 stops18h 25m

Porto

Thu 10/1

5:00 am-8:30 pm

2 stops21h 30m

$969

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/23

5:10 pm-3:25 pm

2 stops16h 15m

Porto

Wed 10/7

5:00 am-8:30 pm

2 stops21h 30m

$969
Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/2

11:05 am-7:00 am

1 stop13h 55m

Porto

Mon 9/7

12:10 pm-7:55 pm

1 stop13h 45m

$1,021

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 9/7

7:20 am-7:00 am

2 stops17h 40m

Porto

Mon 9/14

6:00 am-7:55 pm

1 stop19h 55m

$1,026

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/6

2:00 pm-9:45 am

2 stops13h 45m

Porto

Sun 9/13

12:15 pm-8:12 pm

1 stop13h 57m

$1,039

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 10/1

10:30 am-8:30 am

2 stops16h 00m

Porto

Sun 10/11

5:00 am-7:38 pm

2 stops20h 38m

$1,089
Cheapest one-way

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 8/24

10:25 pm-3:05 pm

2 stops58h 40m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 16 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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 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 >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?

The best time to book flights from Chicago O'Hare Intl Airport to Porto is 44 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Porto (average of $558). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $1,291). 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?

Airfare is below average for this route at the moment.

Chicago O'Hare Intl Airport to Porto flights typically cost between $745 and $967 in August.
The cheapest round-trip price found within the last 5 days was $620 on TAP AIR PORTUGAL (Aug 13-Aug 26).

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 July 27, 2026.
Peruse reviews from past customers who have flown with United Airlines,TAP AIR PORTUGAL, andAmerican Airlines 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
10,043 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
United Airlines
7.4
Good
10,043 reviews
United Airlines
7.4
Good
10,043 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
TAP AIR PORTUGAL
7.2
Good
2,349 reviews
United Airlines
7.4
Good
10,043 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
American Airlines
7.1
Good
11,840 reviews
United Airlines
7.4
Good
10,043 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
Iberia
7.0
Good
3,258 reviews
United Airlines
7.4
Good
10,043 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!
Lufthansa
6.8
Okay
8,161 reviews
United Airlines
7.4
Good
10,043 reviews

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Ruth,Dec 2024

ORD - AMS

United Airlines flights seem to always use a bus to/from the boarding gate to the plane. Can they not get their own gate? This time there was no lift when leaving the plane and people in wheelchairs somehow had to climb down the steps to the ground to get to the bus. I udon’t know how some managed that!

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. 7 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 50m. Fly via Turkish Airlines, Scandinavian Airlines, or KLM 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 $451, 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 Lufthansa and United Airlines - these airlines can fly you to your destination from $474 and $489, respectively. Users have found that TAP AIR PORTUGAL is 44% cheaper than the other options available to this destination.

  • 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, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Porto (average of $558). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $1,291). 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
Arcos de Valdevez
Coimbra
Aveiro

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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 Faro flights
Midway to Ponta Delgada flights

Top 7 airlines flying from O'Hare Intl to Porto

Discover the top 7 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 July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$451Average$839FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$474Average$610FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$489Average$864FlexibilityNo cancel feeOn-time69%
IberiaCheapest$519Average$747FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$524Average$832FlexibilityNo cancel feeOn-time71%
KLMCheapest$531Average$679FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$618Average$672FlexibilityNo cancel feeOn-time77%

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