Porto

$364+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Feb 15 — Feb 221
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The best prices from Chicago O'Hare Intl to Porto are usually found in February or January, booked 12 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 February 10, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$495
(American Airlines)

One-way from

$364
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$513
Provider with most accurate pricing for Chicago O'Hare Intl-Porto flight deals.
Provider most trusted by Cheapflights users for Chicago O'Hare Intl-Porto flights.
From Chicago O'Hare Intl to Porto
One-way flight from Chicago O'Hare Intl to Porto
Highest demand for flights based on searches. 23% potential increase in price ($218 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Average for round-trip flights in February 2025

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 February 10, 2025.

This American Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 3/34:45 pmORD - OPO
1 stop13h 00mAmerican Airlines
Wed 3/198:20 amOPO - ORD
1 stop12h 10mAmerican Airlines
Deal found 2/9$495
This Expedia deal was found by Cheapflights users on 2/9. 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.
Mon 3/34:45 pmORD - OPO
1 stop13h 00mIberia
Wed 3/198:20 amOPO - ORD
1 stop12h 10mIberia
Deal found 2/9$499
This KLM deal was found by Cheapflights users on 2/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/35:20 pmORD - OPO
1 stop11h 30mKLM
Wed 3/196:00 amOPO - ORD
1 stop14h 30mKLM
Deal found 2/8$508
This Flightnetwork deal was found by Cheapflights users on 2/9. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/47:05 pmORD - OPO
1 stop17h 25mMultiple Airlines
Tue 3/116:00 amOPO - ORD
2 stops32h 01mMultiple Airlines
Deal found 2/9$510
This Booking.com deal was found by Cheapflights users on 2/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/47:20 amORD - OPO
2 stops22h 45mAir Canada
Tue 3/116:00 amOPO - ORD
2 stops18h 37mAir Canada
Deal found 2/10$513
This Delta deal was found by Cheapflights users on 2/9. 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.
Mon 3/246:00 amORD - OPO
2 stops23h 30mDelta
Wed 4/211:25 amOPO - ORD
1 stop32h 45mDelta
Deal found 2/9$526
This FlightHub deal was found by Cheapflights users on 2/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:15 pmORD - OPO
1 stop20h 10mTAP AIR PORTUGAL
Fri 5/910:00 amOPO - ORD
1 stop12h 00mTAP AIR PORTUGAL
Deal found 2/10$529
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/312:20 pmORD - OPO
1 stop15h 05mSWISS
Mon 4/77:20 pmOPO - ORD
1 stop22h 50mSWISS
Deal found 2/10$531
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 3/511:35 amORD - OPO
2 stops18h 05mUnited Airlines
Wed 3/126:00 amOPO - ORD
2 stops31h 01mUnited Airlines
Deal found 2/9$538
This Austrian Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 3/265:20 pmORD - OPO
1 stop13h 35mAustrian Airlines
Mon 3/3110:25 amOPO - ORD
1 stop32h 55mAustrian Airlines
Deal found 2/9$547
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/204:30 pmORD - OPO
1 stop33h 05mBritish Airways
Fri 5/28:15 amOPO - ORD
1 stop12h 00mBritish Airways
Deal found 2/10$606
This Justfly.com deal was found by Cheapflights users on 2/9. 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.
Thu 9/1111:35 amORD - OPO
1 stop16h 10mTurkish Airlines
Fri 9/264:50 pmOPO - ORD
1 stop23h 00mTurkish Airlines
Deal found 2/9$608

Find flights from O'Hare Intl to Porto within your budget

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 February 10, 2025.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/3

4:45 pm-11:45 am

1 stop13h 00m

Porto

Wed 3/19

8:20 am-3:30 pm

1 stop12h 10m

$495

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/3

4:45 pm-11:45 am

1 stop13h 00m

Porto

Wed 3/19

8:20 am-3:30 pm

1 stop12h 10m

$499

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/3

5:20 pm-10:50 am

1 stop11h 30m

Porto

Wed 3/19

6:00 am-3:30 pm

1 stop14h 30m

$508

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 3/4

7:05 pm-6:30 pm

1 stop17h 25m

Porto

Tue 3/11

6:00 am-9:01 am

2 stops32h 01m

$510

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 3/4

7:20 am-12:05 pm

2 stops22h 45m

Porto

Tue 3/11

6:00 am-7:37 pm

2 stops18h 37m

$513

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/24

6:00 am-10:30 am

2 stops23h 30m

Porto

Wed 4/2

11:25 am-2:10 pm

1 stop32h 45m

$526

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 4/26

6:15 pm-8:25 pm

1 stop20h 10m

Porto

Fri 5/9

10:00 am-4:00 pm

1 stop12h 00m

$529

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/31

2:20 pm-11:25 am

1 stop15h 05m

Porto

Mon 4/7

7:20 pm-12:10 pm

1 stop22h 50m

$531

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/5

11:35 am-11:40 am

2 stops18h 05m

Porto

Wed 3/12

6:00 am-8:01 am

2 stops31h 01m

$538

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/26

5:20 pm-11:55 am

1 stop13h 35m

Porto

Mon 3/31

10:25 am-1:20 pm

1 stop32h 55m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Showing 1-10 of 22 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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 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.

Travel insights for flights from O'Hare Intl to Porto

Get recent, data-driven insights about flights from O'Hare Intl to Porto including ideal travel times, pricing trends, and more.

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 February 7, 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Porto is 12 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 $523). Flying from Chicago O'Hare Intl Airport to Porto in June is currently the most expensive (average of $1,089). 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 February 10, 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 34% 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.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 February 10, 2025.
To help decide which airline to fly from Chicago to Porto, see what other customers have to say about Delta, KLM and Austrian Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Food

7.3

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.5

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

8.0
Very good
8.0
Very good

Food

7.3

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.5

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.