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$310+ 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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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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 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$513
(Gotogate)

One-way from

$310
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$513
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. 22% potential increase in price ($219 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Gotogate deal was found by Cheapflights users on 2/20. 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.
Tue 4/111:30 amORD - OPO
2 stops17h 45mAir Canada
Tue 4/88:40 amOPO - ORD
2 stops16h 50mAir Canada
Deal found 2/20$513
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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
2 stops17h 25mSWISS
Mon 4/77:20 pmOPO - ORD
1 stop22h 50mSWISS
Deal found 2/19$514
This Gotogate deal was found by Cheapflights users on 2/20. 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.
Tue 4/17:20 amORD - OPO
2 stops22h 05mMultiple Airlines
Tue 4/88:40 amOPO - ORD
2 stops16h 50mMultiple Airlines
Deal found 2/20$516
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 4/11:28 pmORD - OPO
2 stops14h 17mUnited Airlines
Tue 4/86:00 amOPO - ORD
1 stop12h 55mUnited Airlines
Deal found 2/19$517
This Austrian Airlines deal was found by Cheapflights users on 2/19. 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 3/54:20 pmORD - OPO
1 stop13h 35mAustrian Airlines
Thu 3/2012:40 pmOPO - ORD
1 stop31h 25mAustrian Airlines
Deal found 2/19$518
This Gotogate deal was found by Cheapflights users on 2/19. 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 4/26:00 pmORD - OPO
1 stop11h 00mTAP AIR PORTUGAL
Wed 4/98:55 amOPO - ORD
1 stop13h 15mTAP AIR PORTUGAL
Deal found 2/19$519
This KLM deal was found by Cheapflights users on 2/18. 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 3/176:20 pmORD - OPO
1 stop11h 30mKLM
Wed 3/2611:25 amOPO - ORD
2 stops17h 31mKLM
Deal found 2/18$520
This Delta deal was found by Cheapflights users on 2/19. 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.
Wed 3/54:25 pmORD - OPO
1 stop12h 05mDelta
Thu 3/2011:15 amOPO - ORD
2 stops27h 37mDelta
Deal found 2/19$542
This Lufthansa deal was found by Cheapflights users on 2/18. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/1611:35 pmORD - OPO
1 stop17h 50mLufthansa
Wed 3/266:00 amOPO - ORD
1 stop20h 05mLufthansa
Deal found 2/18$545
This oojo deal was found by Cheapflights users on 2/19. 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.
Thu 9/2511:25 amORD - OPO
1 stop22h 25mTurkish Airlines
Mon 10/1310:50 amOPO - ORD
1 stop17h 10mTurkish Airlines
Deal found 2/19$549
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Wed 8/201:15 pmORD - OPO
2 stops16h 25mAmerican Airlines
Tue 8/268:15 amOPO - ORD
1 stop12h 00mAmerican Airlines
Deal found 2/19$638
This Priceline deal was found by Cheapflights users on 2/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/311:45 amORD - OPO
2 stops13h 50mIberia
Wed 9/178:15 amOPO - ORD
1 stop12h 00mIberia
Deal found 2/20$681

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 20, 2025.

Fly from

O'Hare Intl

Fly to

Porto

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 4/1

11:30 am-11:15 am

2 stops17h 45m

Porto

Tue 4/8

8:40 am-7:30 pm

2 stops16h 50m

$513

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/31

2:20 pm-1:45 pm

2 stops17h 25m

Porto

Mon 4/7

7:20 pm-12:10 pm

1 stop22h 50m

$514

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 4/1

7:20 am-11:25 am

2 stops22h 05m

Porto

Tue 4/8

8:40 am-7:30 pm

2 stops16h 50m

$516

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 4/1

1:28 pm-9:45 am

2 stops14h 17m

Porto

Tue 4/8

6:00 am-12:55 pm

1 stop12h 55m

$517

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/5

4:20 pm-11:55 am

1 stop13h 35m

Porto

Thu 3/20

12:40 pm-3:05 pm

1 stop31h 25m

$518

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/2

6:00 pm-11:00 am

1 stop11h 00m

Porto

Wed 4/9

8:55 am-4:10 pm

1 stop13h 15m

$519

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 3/17

6:20 pm-10:50 am

1 stop11h 30m

Porto

Wed 3/26

11:25 am-11:56 pm

2 stops17h 31m

$520

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/5

4:25 pm-10:30 am

1 stop12h 05m

Porto

Thu 3/20

11:15 am-9:52 am

2 stops27h 37m

$542

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 3/16

11:35 pm-10:25 pm

1 stop17h 50m

Porto

Wed 3/26

6:00 am-9:05 pm

1 stop20h 05m

$545

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 4/21

7:50 pm-3:50 pm

1 stop38h 00m

Porto

Tue 4/29

4:50 pm-9:40 am

1 stop22h 50m

$596

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 26 results
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2
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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
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 14, 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 $1,092). 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 20, 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 20, 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.
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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.

Delta
8.0
Very good
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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.

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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.

Austrian Airlines
7.6
Good
773 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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.

SWISS
7.5
Good
1,568 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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.

United Airlines
7.4
Good
8,766 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

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.

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. 9 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.

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

    Currently priced at $514, SWISS will fly you from Chicago O'Hare Intl Airport to Porto and back. In addition to SWISS, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Austrian Airlines - these airlines can fly you to your destination from $517 and $518, respectively. Users have found that SWISS is 29% 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 $415. United Airlines flights start at $472 while deals on KLM start at $530 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 Centro Cultural de Belém. Travelers on a layover in Lisbon can visit Chiado, Praça do Marquês de Pombal, and Centro Cultural de Belém, by traveling 4.5 mi, 3.6 mi, and 6.9 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, 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 $1,092). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
Arcos de Valdevez

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Top 9 airlines flying from O'Hare Intl to Porto

Discover the top 9 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$415Average$618FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$468Average$783FlexibilityNo cancel feeOn-time71%
IberiaCheapest$473Average$728FlexibilityNo cancel feeOn-time77%
DeltaCheapest$519Average$826FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$534Average$807FlexibilityNo cancel feeOn-time76%
KLMCheapest$549Average$838FlexibilityNo cancel feeOn-time75%
SWISSCheapest$616Average$940FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$618Average$1,011FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$648Average$732FlexibilityNo cancel feeOn-time67%
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