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$371+ Cheap flights from Porto (OPO) to Illinois

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — ORD
Nov 5 — Nov 121
Tue 11/5
Tue 11/12
1 adult, Economy
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Find flight deals from Porto to Illinois

Cheapest flights from Porto to Illinois
Explore the most affordable flight options available from Porto to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 31, 2024.

This American Airlines deal was found by Cheapflights users on 10/30. 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 11/188:20 amOPO - ORD
1 stop12h 10mAmerican Airlines
Tue 12/38:43 amORD - OPO
2 stops16h 57mAmerican Airlines
Deal found 10/30$665
This FlightHub deal was found by Cheapflights users on 10/30. 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.
Tue 12/312:05 pmOPO - ORD
1 stop34h 10mSWISS
Mon 12/97:05 pmORD - OPO
1 stop17h 30mSWISS
Deal found 10/30$693
This Lufthansa deal was found by Cheapflights users on 10/30. 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.
Thu 12/266:00 amOPO - ORD
1 stop13h 25mLufthansa
Thu 1/93:15 pmORD - OPO
1 stop17h 55mLufthansa
Deal found 10/30$708
This Orbitz deal was found by Cheapflights users on 10/31. 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.
Tue 12/312:05 pmOPO - ORD
1 stop34h 10mMultiple Airlines
Mon 12/910:35 pmORD - OPO
1 stop17h 50mMultiple Airlines
Deal found 10/31$710
This KLM deal was found by Cheapflights users on 10/31. 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.
Tue 12/34:10 pmOPO - ORD
1 stop28h 20mKLM
Mon 12/91:50 pmORD - OPO
2 stops15h 00mKLM
Deal found 10/31$716
This Delta deal was found by Cheapflights users on 10/30. 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.
Sat 11/96:00 amOPO - ORD
2 stops21h 32mDelta
Wed 11/274:25 pmORD - OPO
1 stop12h 05mDelta
Deal found 10/30$721
This United Airlines deal was found by Cheapflights users on 10/30. 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 11/912:30 pmOPO - ORD
1 stop13h 35mUnited Airlines
Sun 11/243:15 pmORD - OPO
1 stop17h 55mUnited Airlines
Deal found 10/30$753
This FlightHub deal was found by Cheapflights users on 10/30. 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.
Fri 11/88:20 amOPO - ORD
1 stop12h 10mIberia
Thu 11/284:45 pmORD - OPO
1 stop17h 15mIberia
Deal found 10/30$794
This Delta deal was found by Cheapflights users on 10/31. 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.
Sat 11/166:00 amOPO - STL
2 stops21h 29mDelta
Wed 11/206:30 amSTL - OPO
2 stops22h 00mDelta
Deal found 10/31$804
This Lufthansa deal was found by Cheapflights users on 10/31. 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.
Sat 11/166:00 amOPO - STL
2 stops23h 28mLufthansa
Wed 11/203:45 pmSTL - OPO
1 stop13h 55mLufthansa
Deal found 10/31$843
This Mytrip deal was found by Cheapflights users on 10/31. 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 11/162:10 pmOPO - STL
3 stops32h 24mMultiple Airlines
Wed 11/2012:15 pmSTL - OPO
3 stops18h 50mMultiple Airlines
Deal found 10/31$1,087
This Justfly.com deal was found by Cheapflights users on 10/30. 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 11/98:45 amOPO - ORD
2 stops16h 47mAir Canada
Tue 11/2611:35 amORD - OPO
2 stops18h 30mAir Canada
Deal found 10/30$1,105

Find flights from Porto to Illinois within your budget

Customize your flight search to find flights from Porto to Illinois 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 2,570,725 searches. Data last updated October 31, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortoChicago

OPO - ORD

OPOORD

Porto

Sun 11/10

5:05 pm-9:50 am

3 stops46h 45m

$371

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 11/8

9:00 am-3:30 pm

1 stop12h 30m

$524

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 11/9

10:40 am-10:10 am

1 stop29h 30m

$580

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 3/29

8:40 pm-1:45 pm

2 stops22h 05m

$674

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 1/1

6:30 pm-6:45 pm

1 stop30h 15m

$890

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/18

8:20 am-2:30 pm

1 stop12h 10m

Chicago O'Hare Intl

Tue 12/3

8:43 am-7:40 am

2 stops16h 57m

$665

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 12/3

12:05 pm-4:15 pm

1 stop34h 10m

Chicago O'Hare Intl

Mon 12/9

7:05 pm-6:35 pm

1 stop17h 30m

$693

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 12/26

6:00 am-1:25 pm

1 stop13h 25m

Chicago O'Hare Intl

Thu 1/9

3:15 pm-3:10 pm

1 stop17h 55m

$708

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 12/3

12:05 pm-4:15 pm

1 stop34h 10m

Chicago O'Hare Intl

Mon 12/9

10:35 pm-10:25 pm

1 stop17h 50m

$710

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 12/3

4:10 pm-2:30 pm

1 stop28h 20m

Chicago O'Hare Intl

Mon 12/9

1:50 pm-10:50 am

2 stops15h 00m

$716

Flights are sorted by cheapest first

Deals found on 10/30

Showing 1-10 of 17 results
1
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Best time to book a flight from Porto to Illinois

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

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

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

Currently, September is the cheapest month in which you can book a flight from Porto to Illinois (average of $232). Flying from Porto to Illinois in June is currently the most expensive (average of $308). 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.

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated October 31, 2024.
See what other customers who have flown with Lufthansa, United Airlines and Iberia from Porto to Illinois have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,835 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,835 reviews
Delta
8.0
Very good
8,835 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,352 reviews
Delta
8.0
Very good
8,835 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.6
Good
1,644 reviews
Delta
8.0
Very good
8,835 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Turkish Airlines
7.4
Good
3,873 reviews
Delta
8.0
Very good
8,835 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
9,240 reviews
Delta
8.0
Very good
8,835 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Porto to Illinois. 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 from for flights from Porto to Illinois?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly out of when you book flights from Porto to Illinois.

  • Can I find flights from Porto to Illinois for under $700 on Cheapflights?

    Yes, there are multiple flights from Porto to Illinois for under $700. The cheapest flight booked recently is on American Airlines for just $665, but on average you can expect to pay $863.

  • Are there last-minute flights available from Porto to Illinois for under $800?

    There are currently 7+ open flights from Porto to Illinois within the next 7 days for less than $800.

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

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $524. Users have also found prices from $580 and $674 on Turkish Airlines and Iberia, respectively.

  • What does OPO to ORD mean?

    This is defined as Porto Airport (OPO) and Chicago O'Hare Intl Airport (ORD). Codes like Chicago O'Hare Intl Airport are often used to just call airports uniquely. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Champaign University-Willard Airport (CMI).

  • Can I find deals for flights from Porto to Illinois that include extra baggage allowance?

    The amount of baggage you can bring on your Porto to Illinois flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Porto to Illinois with specific airlines?

    Yes, Cheapflights allows you to browse and filter Porto to Illinois flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Porto to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Porto to Illinois that allow pets onboard?

    Many airlines flying from Porto to Illinois offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Porto to Illinois?

    Yes, you can often find last-minute deals on Porto to Illinois flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Porto to Illinois flight deals updated?

    The Porto to Illinois flight deals you see on this page were last updated on 10/31.

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

    Currently, September is the cheapest month in which you can book a flight from Porto to Illinois (average of $232). Flying from Porto to Illinois in June is currently the most expensive (average of $308). 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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Alternative routes for Porto to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Porto to Illinois

Discover the top airline that operate flights from Porto to Illinois. 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 2,570,725 searches. Data last updated October 31, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$846Average$879FlexibilityNo cancel feeOn-time69%
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