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$324+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — ORD
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
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Cheap flight deals from Porto to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Illinois (USIL). 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.

Round-trip from

$582
(Mytrip)

One-way from

$324
(Kiwi.com)
From Porto to Illinois
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One-way flight from Porto to Illinois
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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 December 18, 2024.

This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/278:20 amOPO - ORD
1 stop12h 10mAmerican Airlines
Sat 1/1110:00 pmORD - OPO
2 stops16h 00mAmerican Airlines
Deal found 12/17$711
This AirNGo 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2711:15 amOPO - ORD
1 stop33h 15mKLM
Sat 1/115:20 pmORD - OPO
1 stop11h 30mKLM
Deal found 12/17$721
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.
Fri 12/271:55 pmOPO - ORD
2 stops31h 55mMultiple Airlines
Sat 1/117:10 pmORD - OPO
3 stops33h 20mMultiple Airlines
Deal found 12/17$978
This TAP AIR PORTUGAL 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/276:55 amOPO - ORD
1 stop14h 35mTAP AIR PORTUGAL
Sat 1/117:00 amORD - OPO
2 stops20h 50mTAP AIR PORTUGAL
Deal found 12/17$1,141
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/198:20 amOPO - ORD
1 stop12h 10mIberia
Mon 12/234:45 pmORD - OPO
1 stop13h 00mIberia
Deal found 12/17$2,437

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 2,558,603 searches. Data last updated December 18, 2024.

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Depart

Return

Price

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 1/31

7:00 am-6:25 pm

2 stops17h 25m

Chicago O'Hare Intl

Fri 2/7

9:25 pm-11:10 pm

2 stops19h 45m

$582

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 4/11

5:55 pm-4:10 pm

1 stop28h 15m

Chicago O'Hare Intl

Mon 4/21

7:15 pm-11:15 am

1 stop34h 00m

$605

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 2/1

10:40 am-10:10 am

1 stop29h 30m

Chicago O'Hare Intl

Sat 2/8

11:55 am-3:30 pm

1 stop21h 35m

$691

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 2/24

8:35 am-10:44 pm

2 stops20h 09m

Chicago O'Hare Intl

Sun 3/2

4:45 pm-11:45 am

1 stop13h 00m

$706

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 2/1

6:00 am-3:15 pm

1 stop15h 15m

Chicago O'Hare Intl

Sat 2/8

9:25 pm-11:35 pm

1 stop20h 10m

$708

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 2/24

12:25 pm-10:54 am

2 stops52h 29m

Chicago O'Hare Intl

Sun 3/2

7:20 am-11:35 am

2 stops22h 15m

$714

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 1/31

6:15 am-5:36 pm

2 stops17h 21m

Chicago O'Hare Intl

Fri 2/7

1:40 pm-10:50 am

2 stops15h 10m

$733

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 4/11

9:15 am-8:34 pm

2 stops17h 19m

Chicago O'Hare Intl

Mon 4/21

1:35 pm-3:30 pm

2 stops19h 55m

$737

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 6/12

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Tue 6/24

2:20 pm-11:25 am

1 stop15h 05m

$738

PortoChicago

OPO - ORD

OPOORD

Porto

Sun 1/5

8:20 am-8:07 pm

2 stops17h 47m

Chicago O'Hare Intl

Sat 1/11

10:00 pm-7:15 pm

1 stop15h 15m

$1,156

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 17 results
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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 December 18, 2024.
Delta
8.0
Very good
8,604 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.6

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

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.6

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
1,349 reviews
Delta
8.0
Very good
8,604 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.6

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
1,606 reviews
Delta
8.0
Very good
8,604 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.6

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
9,055 reviews
Delta
8.0
Very good
8,604 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.6

Reviews

1 / 10

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

Turkish Airlines
7.3
Good
3,907 reviews
Delta
8.0
Very good
8,604 reviews

Boarding

8.2

Overall

8.0

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.6

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.

  • 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 $513. Users have also found prices from $569 and $595 on Turkish Airlines and British Airways, respectively.

  • 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.

  • 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.

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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 2,558,603 searches. Data last updated December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$846Average$879FlexibilityNo cancel feeOn-time69%
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