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$361+ Cheap flights from Chicago (CHI) 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 3/27. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — OPO
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
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The best prices from Chicago to Porto are usually found in January or February, booked 43 days in advance, depart on a Monday or Sunday and return on a Wednesday

Cheap flight deals from Chicago to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 December 18, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$430
(Ticket)

Popular in

June

Cheapest in

January

Average price

$592
Provider with most accurate pricing for Chicago (CHI)-Porto flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Porto flights.
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From Chicago (CHI) to Porto
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High demand for flights, 24% potential price rise
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Best time to find cheap flights, 3% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from Chicago to Porto

Cheapest flights from Chicago to Porto
Explore the most affordable flight options available from Chicago to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2024.

This United Airlines deal was found by Cheapflights users on 12/17. 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.
Sat 12/289:50 amORD - OPO
2 stops19h 50mUnited Airlines
Sat 1/1112:30 pmOPO - ORD
1 stop28h 35mUnited Airlines
Deal found 12/17$880
This Mytrip deal was found by Cheapflights users on 12/17. 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.
Sat 12/288:14 pmORD - OPO
3 stops33h 36mMultiple Airlines
Sat 1/117:05 amOPO - ORD
2 stops18h 32mMultiple Airlines
Deal found 12/17$960
This KAYAK deal was found by Cheapflights users on 12/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/235:55 pmORD - OPO
2 stops22h 30mLufthansa
Mon 12/306:00 amOPO - ORD
1 stop15h 15mLufthansa
Deal found 12/16$1,126
This KLM deal was found by Cheapflights users on 12/17. 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.
Sat 12/284:25 pmORD - OPO
1 stop12h 05mKLM
Sat 1/116:00 amOPO - ORD
1 stop14h 30mKLM
Deal found 12/17$1,177
This SWISS deal was found by Cheapflights users on 12/18. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/317:05 pmORD - OPO
1 stop34h 10mSWISS
Tue 1/711:25 amOPO - ORD
2 stops56h 15mSWISS
Deal found 12/18$1,242
This FlightHub deal was found by Cheapflights users on 12/17. 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 12/187:15 pmORD - OPO
1 stop11h 50mTAP AIR PORTUGAL
Wed 1/18:55 amOPO - ORD
1 stop12h 35mTAP AIR PORTUGAL
Deal found 12/17$1,929
This Austrian Airlines deal was found by Cheapflights users on 12/18. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/204:20 pmORD - OPO
1 stop13h 50mAustrian Airlines
Sat 12/2812:55 pmOPO - ORD
2 stops31h 10mAustrian Airlines
Deal found 12/18$1,964
This Aeromexico deal was found by Cheapflights users on 12/17. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/292:55 pmORD - OPO
2 stops40h 05mAir France
Sat 1/41:45 pmOPO - ORD
2 stops54h 45mAir France
Deal found 12/17$2,132
This Air Canada deal was found by Cheapflights users on 12/17. 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.
Fri 12/2011:35 amORD - OPO
2 stops19h 15mAir Canada
Mon 12/306:00 amOPO - ORD
2 stops32h 57mAir Canada
Deal found 12/17$2,354
This KAYAK deal was found by Cheapflights users on 12/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/294:45 pmORD - OPO
1 stop13h 00mIberia
Sat 1/412:25 pmOPO - ORD
1 stop32h 05mIberia
Deal found 12/17$2,684
This Turkish Airlines deal was found by Cheapflights users on 12/17. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/178:30 pmORD - OPO
1 stop36h 55mTurkish Airlines
Mon 12/304:25 pmOPO - ORD
1 stop23h 45mTurkish Airlines
Deal found 12/17$2,706
This Delta deal was found by Cheapflights users on 12/17. 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.
Tue 12/3111:48 amMDW - OPO
2 stops17h 02mDelta
Fri 1/36:15 amOPO - MDW
2 stops21h 51mDelta
Deal found 12/17$2,857

Find flights from Chicago to Porto within your budget

Customize your flight search to find flights from Chicago 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 December 18, 2024.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 1/31

8:20 pm-8:00 am

1 stop29h 40m

Porto

Fri 2/7

6:55 am-3:30 pm

1 stop14h 35m

$430

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 2/18

4:45 pm-4:00 pm

1 stop17h 15m

Porto

Wed 2/26

8:20 am-2:30 pm

1 stop12h 10m

$511

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 2/18

3:55 pm-11:40 am

1 stop13h 45m

Porto

Fri 2/28

6:05 am-6:25 pm

1 stop18h 20m

$515

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 1/24

6:30 pm-6:15 pm

2 stops17h 45m

Porto

Fri 1/31

7:00 am-5:20 pm

2 stops16h 20m

$518

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 2/18

9:45 pm-8:00 pm

2 stops16h 15m

Porto

Fri 2/28

8:20 am-2:30 pm

1 stop12h 10m

$535

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 2/9

7:05 pm-6:40 pm

1 stop17h 35m

Porto

Mon 2/17

12:00 pm-4:15 pm

1 stop34h 15m

$540

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 1/7

5:20 pm-10:50 am

1 stop11h 30m

Porto

Tue 1/14

9:55 am-2:30 pm

1 stop34h 35m

$543

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 1/15

11:40 am-7:40 am

2 stops14h 00m

Porto

Wed 1/22

8:20 am-9:56 pm

2 stops19h 36m

$547

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Fri 1/31

1:26 pm-10:50 am

2 stops15h 24m

Porto

Fri 2/7

6:15 am-6:11 pm

2 stops17h 56m

$554

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 2/9

3:55 pm-3:10 pm

1 stop17h 15m

Porto

Mon 2/17

12:25 pm-4:35 pm

2 stops34h 10m

$556

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 27 results
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Compare providers for flights from Chicago 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 Chicago to Porto in December.
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*2 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-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-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-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 Chicago to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Chicago 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 Chicago to Porto

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

How far ahead should I book a flight from Chicago to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Porto. Price data was last updated on December 13, 2024.

The price you pay for your flight from Chicago to Porto may vary depending on when you book. For the best chance of a lower fare, look to book 43 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Chicago to Porto?

Currently, January is the cheapest month in which you can book a flight from Chicago to Porto (average of $523). Flying from Chicago to Porto in June is currently the most expensive (average of $1,000). 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 CHI to OPO?

Find hourly flight availability from Chicago 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 December 18, 2024.

A simple way to save on the total cost of your ticket is to fly from Chicago to Porto in the evening. If you’re flexible enough to do this you can expect to save up to 40% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Chicago to Porto?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago 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 December 18, 2024.
Read through reviews of airlines operating flights from Chicago to Porto, such as Delta, SWISS and Air Canada. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,604 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

Delta
8.0
Very good
8,604 reviews
Delta
8.0
Very good
8,604 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

KLM
7.8
Good
1,349 reviews
Delta
8.0
Very good
8,604 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

Finnair
7.7
Good
1,285 reviews
Delta
8.0
Very good
8,604 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

SWISS
7.6
Good
1,606 reviews
Delta
8.0
Very good
8,604 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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

Air France
7.4
Good
1,504 reviews
Delta
8.0
Very good
8,604 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.3

Comfort

7.9

Entertainment

7.9

Reviews

1 / 10

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 Chicago 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?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly into when you book flights from Chicago to Porto. 9 airlines have flights to Porto from Chicago on a regular basis. Booking flights from Chicago to Porto should not be difficult; the airport handles an average of 0 inbound flights from Chicago per day.

  • What are the cheapest airlines flying from Chicago to Porto round-trip?

    TAP AIR PORTUGAL, at $430, was found to be the cheapest airline from Chicago to Porto.Alternate airlines to your destination round-trip include Iberia and Lufthansa. TAP AIR PORTUGAL is 37% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Chicago to Porto one-way?

    The cheapest airlines for a one-way flight from Chicago to Porto are Air Canada ($504), KLM ($539), and Delta ($667).

  • Where are the most common layover locations when flying from Chicago to Porto?

    Most of the time, Chicago to Porto flights that have layovers will stop in Madrid.

  • What are some popular things to do or see while on a layover in Madrid?

    Madrid travelers tend to visit Puerta del Sol, Plaza Mayor, and Spain Building more than anywhere else. Puerta del Sol, Plaza Mayor, and Spain Building are located about 8.4 mi, 8.6 mi, and 8.5 mi, respectively from Madrid Barajas. Those landing in Madrid looking to spend some time exploring during their layover can rent a car for about $26 per day.

  • Where are the least popular layover locations for Chicago to Porto flights?

    Chicago to Porto flights have a layover in Lisbon the least frequently.

  • Can I find deals for flights from Chicago to Porto that include hotel bookings?

    Yes. In addition to deals on Chicago to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Porto.

  • Can I find deals for business class flights from Chicago to Porto?

    Yes. Cheapflights offers flight deals from Chicago 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 to Porto?

    Currently, January is the cheapest month in which you can book a flight from Chicago to Porto (average of $523). Flying from Chicago to Porto in June is currently the most expensive (average of $1,000). 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

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Top 9 airlines flying from Chicago to Porto

Discover the top 9 airlines that operate flights from Chicago 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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$423Average$644FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$468Average$741FlexibilityNo cancel feeOn-time71%
IberiaCheapest$487Average$650FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$506Average$797FlexibilityNo cancel feeOn-time70%
DeltaCheapest$519Average$826FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$527Average$838FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$534Average$834FlexibilityNo cancel feeOn-time76%
SWISSCheapest$616Average$940FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$626Average$1,042FlexibilityNo cancel feeOn-time69%
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