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$319+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — ORD
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
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 octubre 30, 2025.

This Trip.com deal was found by Cheapflights users on 10/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/145:35 pmOPO - ORD
1 stop29h 10mScandinavian Airlines
jue. 11/277:20 pmORD - OPO
1 stop15h 35mScandinavian Airlines
Deal found 10/28$480
This lol.travel 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/215:35 pmOPO - ORD
1 stop29h 10mScandinavian Airlines
dom. 12/77:20 pmORD - OPO
1 stop15h 25mScandinavian Airlines
Deal found 10/30$502
This FlightHub deal was found by Cheapflights users on 10/29. 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.
sáb. 11/226:00 pmOPO - ORD
1 stop26h 45mTAP AIR PORTUGAL
dom. 1/188:25 pmORD - OPO
1 stop14h 35mTAP AIR PORTUGAL
Deal found 10/29$569
This Mytrip deal was found by Cheapflights users on 10/29. 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.
jue. 11/137:35 amOPO - ORD
2 stops32h 12mMultiple Airlines
lun. 11/1712:17 pmORD - OPO
2 stops25h 03mMultiple Airlines
Deal found 10/29$658
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/179:55 pmOPO - ORD
2 stops26h 00mMultiple Airlines
mié. 1/79:00 pmORD - OPO
2 stops18h 15mMultiple Airlines
Deal found 10/30$704
This Mytrip deal was found by Cheapflights users on 10/29. 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.
sáb. 11/228:45 amOPO - ORD
2 stops36h 00mMultiple Airlines
dom. 1/188:25 pmORD - OPO
2 stops20h 35mMultiple Airlines
Deal found 10/29$710

Cheap flight deals from Porto to Illinois

Keep the following information in mind while searching for Porto to Illinois flight deals. Data was last updated octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$502
(lol.travel)

One-way from

$319
(Kiwi.com)

Popular in

September

Cheapest in

February

Average price

$762
Provider with most accurate pricing for Porto-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Porto-Chicago (CHI) flights.
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From Porto to Illinois
Search Deals
One-way flight from Porto to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($124 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Cheapflights Fare Finder

 
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 octubre 30, 2025.
Use the filters below to find and compare flights from Porto to Illinois that are best for you.

Fly from

Porto

Fly to

Illinois

Route

Depart

Return

Price

PortoChicago

OPO - ORD

OPOORD

Porto

mié. 12/17

9:55 pm-5:55 pm

2 stops26h 00m

Chicago O'Hare Intl

mié. 1/7

9:00 pm-9:15 pm

2 stops18h 15m

$704

PortoChicago

OPO - ORD

OPOORD

Porto

vie. 11/21

5:35 pm-9:27 pm

2 stops33h 52m

Chicago O'Hare Intl

dom. 12/7

7:00 am-4:45 pm

2 stops27h 45m

$757

PortoChicago

OPO - ORD

OPOORD

Porto

mié. 12/17

12:30 pm-8:05 pm

1 stop13h 35m

Chicago O'Hare Intl

mié. 1/7

6:00 pm-1:15 pm

1 stop13h 15m

$775

PortoChicago

OPO - ORD

OPOORD

Porto

lun. 11/24

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

lun. 12/1

10:35 am-10:30 am

2 stops17h 55m

$777

PortoChicago

OPO - ORD

OPOORD

Porto

lun. 11/24

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

lun. 12/1

5:20 pm-10:30 am

1 stop11h 10m

$777

PortoChicago

OPO - ORD

OPOORD

Porto

lun. 11/24

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

lun. 12/1

2:35 pm-10:30 am

2 stops13h 55m

$777

PortoChicago

OPO - ORD

OPOORD

Porto

vie. 11/21

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

dom. 12/7

10:35 am-10:30 am

2 stops17h 55m

$777

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 11/13

11:15 am-2:20 pm

1 stop33h 05m

Chicago O'Hare Intl

lun. 11/17

5:20 pm-10:30 am

1 stop11h 10m

$779

PortoSt. Louis

OPO - STL

OPOSTL

Porto

vie. 2/6

11:15 am-4:39 pm

2 stops35h 24m

Lambert-St Louis

dom. 2/8

5:56 pm-10:30 am

2 stops34h 34m

$850

PortoChicago

OPO - ORD

OPOORD

Porto

mié. 2/4

8:45 am-12:57 pm

2 stops34h 12m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 25 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.

Cheapflights Insights

Everything you need to know about your flight from Porto to Illinois
No data available for this route at this time. Please check back soon.

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.

  • How long is the flight from Porto to Illinois?

    For as low as $775, Scandinavian Airlines can have you in Illinois from Porto in 13h 35m. The distance between Porto and Illinois is about 3931 mi. This flight may include one or multiple stops.

  • 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.

See more FAQs

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