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$294+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OPO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to Porto are usually found in February or November, 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 June 12, 2025.

Round-trip from

$654
(United Airlines)

One-way from

$294
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$983
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. 19% potential increase in price ($164 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/10. 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.
Sun 9/146:00 pmORD - OPO
1 stop10h 55mTAP AIR PORTUGAL
Sat 9/2011:00 amOPO - ORD
1 stop11h 30mTAP AIR PORTUGAL
Deal found 6/10$653
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/179:00 amORD - OPO
2 stops15h 55mUnited Airlines
Sun 8/3112:10 pmOPO - ORD
2 stops29h 47mUnited Airlines
Deal found 6/10$654
This Travelocity deal was found by Cheapflights users on 6/10. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/84:30 pmORD - OPO
1 stop33h 05mIberia
Wed 7/234:35 pmOPO - ORD
2 stops26h 55mIberia
Deal found 6/10$655
This Justfly.com deal was found by Cheapflights users on 6/10. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1610:30 pmORD - OPO
1 stop18h 15mMultiple Airlines
Sun 10/266:00 amOPO - ORD
2 stops33h 58mMultiple Airlines
Deal found 6/10$665
This Air Canada deal was found by Cheapflights users on 6/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/146:06 pmORD - OPO
2 stops33h 29mAir Canada
Mon 9/226:00 amOPO - ORD
2 stops32h 01mAir Canada
Deal found 6/10$677
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/74:20 pmORD - OPO
1 stop19h 35mDelta
Tue 7/156:35 amOPO - ORD
1 stop14h 25mDelta
Deal found 6/10$684
This FlightHub deal was found by Cheapflights users on 6/10. 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 9/1311:45 pmORD - OPO
1 stop28h 10mTurkish Airlines
Sun 9/215:10 pmOPO - ORD
1 stop22h 30mTurkish Airlines
Deal found 6/10$685
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
Thu 10/164:00 pmORD - OPO
1 stop17h 45mLufthansa
Sun 10/266:15 amOPO - ORD
2 stops19h 50mLufthansa
Deal found 6/11$696
This SWISS deal was found by Cheapflights users on 6/11. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/77:05 pmORD - OPO
2 stops36h 40mSWISS
Thu 7/172:35 pmOPO - ORD
2 stops31h 20mSWISS
Deal found 6/11$709
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/194:20 pmORD - OPO
1 stop17h 15mKLM
Fri 9/266:40 amOPO - ORD
1 stop13h 30mKLM
Deal found 6/10$715
This Ovago deal was found by Cheapflights users on 6/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/294:30 pmORD - OPO
1 stop17h 25mBritish Airways
Sun 8/39:25 pmOPO - ORD
1 stop23h 15mBritish Airways
Deal found 6/10$782
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 9/199:24 amORD - OPO
2 stops16h 11mAmerican Airlines
Sun 9/288:15 amOPO - ORD
2 stops19h 05mAmerican Airlines
Deal found 6/11$797

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 June 12, 2025.
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 8/17

9:00 am-6:55 am

2 stops15h 55m

Porto

Sun 8/31

12:10 pm-11:57 am

2 stops29h 47m

$654

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 7/8

4:30 pm-7:35 am

1 stop33h 05m

Porto

Wed 7/23

4:35 pm-1:30 pm

2 stops26h 55m

$655

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 7/7

4:20 pm-5:55 pm

1 stop19h 35m

Porto

Tue 7/15

6:35 am-3:00 pm

1 stop14h 25m

$684

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 7/7

7:01 pm-3:35 pm

2 stops14h 34m

Porto

Tue 7/15

6:35 am-3:00 pm

1 stop14h 25m

$686

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 8/26

6:06 pm-9:20 am

2 stops33h 14m

Porto

Fri 9/5

6:00 am-8:11 pm

2 stops20h 11m

$700

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 7/7

7:05 pm-1:45 pm

2 stops36h 40m

Porto

Thu 7/17

2:35 pm-3:55 pm

2 stops31h 20m

$709

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 8/22

6:00 pm-10:35 am

1 stop10h 35m

Porto

Mon 9/1

7:00 am-4:40 pm

1 stop15h 40m

$710

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 7/7

9:40 pm-11:20 pm

1 stop19h 40m

Porto

Thu 7/17

6:00 am-2:55 pm

1 stop14h 55m

$736

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 6/24

4:20 pm-10:40 am

1 stop12h 20m

Porto

Tue 7/1

6:50 pm-2:40 pm

1 stop25h 50m

$741

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 7/29

4:30 pm-3:55 pm

1 stop17h 25m

Porto

Sun 8/3

9:25 pm-2:40 pm

1 stop23h 15m

$782

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 20 results
1
2

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 June 9, 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 $1,047). 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 June 12, 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 June 12, 2025.
To help decide which airline to fly from Chicago to Porto, see what other customers have to say about Delta, KLM and Air France. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Currently priced at $654, United Airlines will fly you from Chicago O'Hare Intl Airport to Porto and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Iberia and Delta - these airlines can fly you to your destination from $655 and $684, respectively. Users have found that United Airlines is 4% 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 $295. Lufthansa flights start at $456 while deals on Air Canada start at $458 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 $21 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 $1,047). 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 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$415Average$617FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$468Average$730FlexibilityNo cancel feeOn-time71%
IberiaCheapest$472Average$700FlexibilityNo cancel feeOn-time77%
DeltaCheapest$498Average$734FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$504Average$736FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$535Average$724FlexibilityNo cancel feeOn-time76%
SWISSCheapest$558Average$752FlexibilityNo cancel feeOn-time79%
KLMCheapest$563Average$796FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$569Average$795FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$646Average$732FlexibilityNo cancel feeOn-time67%

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