What is the cheapest airline that flies from Porto to Illinois?

Scandinavian Airlines, American Airlines, and TAP AIR PORTUGAL are the most popular carriers operating from Porto to Illinois

When did momondo last update prices for flights from Porto Airport to Illinois?

Prices for flights from Porto Airport to Illinois are refreshed on a daily basis.

How old do you have to be to fly from Porto Airport to Illinois?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$302 Cheap Flights from Porto to Illinois in 2025/26

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Find the cheapest flights from Porto to Illinois

Round-trip

One-way

Cheap round-trip flights

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5:35 pm - 4:45 pmOPO-ORD

29h 10m1 stop

7:20 pm - 4:45 pmORD-OPO

15h 25m1 stop

$459Scandinavian Airlines

Find Deal

Fri, Nov 21 - Sun, Dec 7

5:35 pm - 4:45 pmOPO-ORD

29h 10m1 stop

7:20 pm - 4:45 pmORD-OPO

15h 25m1 stop

$526Scandinavian Airlines

Find Deal

Fri, Nov 21 - Sun, Dec 7

5:35 pm - 4:45 pmOPO-ORD

29h 10m1 stop

7:20 pm - 4:45 pmORD-OPO

15h 25m1 stop

$529Scandinavian Airlines

Find Deal

Fri, Nov 21 - Sun, Dec 7

9:00 am - 3:25 pmOPO-ORD

12h 25m1 stop

8:25 pm - 8:00 amORD-OPO

29h 35m1 stop

$606TAP AIR PORTUGAL

Find Deal

Fri, Nov 21 - Sun, Dec 7

9:55 pm - 8:00 pmOPO-ORD

28h 05m3 stops

3:55 pm - 10:20 pmORD-OPO

24h 25m3 stops

$711Multiple Airlines

Find Deal

Thu, Nov 13 - Mon, Nov 17

8:00 pm - 5:55 pmOPO-ORD

27h 55m2 stops

7:40 pm - 8:30 pmORD-OPO

18h 50m1 stop

$717Multiple Airlines

Find Deal

Thu, Nov 13 - Mon, Nov 17

6:00 am - 12:55 pmOPO-ORD

12h 55m1 stop

5:55 pm - 11:25 pmORD-OPO

23h 30m1 stop

$768Lufthansa

Find Deal

Wed, Apr 1 - Sun, Apr 5

6:00 am - 7:55 pmOPO-ORD

19h 55m1 stop

9:40 pm - 11:25 pmORD-OPO

19h 45m1 stop

$769Lufthansa

Find Deal

Wed, Apr 1 - Sun, Apr 5

6:30 am - 2:20 pmOPO-ORD

13h 50m1 stop

11:03 am - 10:30 amORD-OPO

17h 27m2 stops

$771Delta

Find Deal

Mon, Nov 24 - Mon, Dec 1

6:30 am - 2:20 pmOPO-ORD

13h 50m1 stop

5:20 pm - 10:30 amORD-OPO

11h 10m1 stop

$772Delta

Find Deal

Mon, Nov 24 - Mon, Dec 1

Scandinavian Airlines flights from Porto to Illinois

Our best Scandinavian Airlines deals on Porto to Illinois flight tickets

Scandinavian Airlines

Nov 21

OPO5:35 pmPorto

29h 10m

1 stop

ORD4:45 pmChicago O'Hare Intl

Dec 7

ORD7:20 pmChicago O'Hare Intl

15h 25m

1 stop

OPO4:45 pmPorto

$459

Find similar

Scandinavian Airlines

Nov 21

OPO5:35 pmPorto

29h 10m

1 stop

ORD4:45 pmChicago O'Hare Intl

Dec 7

ORD7:20 pmChicago O'Hare Intl

15h 25m

1 stop

OPO4:45 pmPorto

$526

Find similar

Scandinavian Airlines

Nov 21

OPO5:35 pmPorto

29h 10m

1 stop

ORD4:45 pmChicago O'Hare Intl

Dec 7

ORD7:20 pmChicago O'Hare Intl

15h 25m

1 stop

OPO4:45 pmPorto

$529

Find similar

Lufthansa flights from Porto to Illinois

Our best Lufthansa deals on Porto to Illinois flight tickets

Lufthansa

Apr 1

OPO6:00 amPorto

12h 55m

1 stop

ORD12:55 pmChicago O'Hare Intl

Apr 5

ORD5:55 pmChicago O'Hare Intl

23h 30m

1 stop

OPO11:25 pmPorto

$768

Find similar

Lufthansa

Apr 1

OPO6:00 amPorto

19h 55m

1 stop

ORD7:55 pmChicago O'Hare Intl

Apr 5

ORD9:40 pmChicago O'Hare Intl

19h 45m

1 stop

OPO11:25 pmPorto

$769

Find similar

Lufthansa

Mar 27

OPO6:00 amPorto

13h 10m

1 stop

ORD2:10 pmChicago O'Hare Intl

Apr 7

ORD9:40 pmChicago O'Hare Intl

19h 45m

1 stop

OPO11:25 pmPorto

$786

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 11/21

5:35 pm-4:45 pm

1 stop29h 10m

Chicago O'Hare Intl

Sun 12/7

7:20 pm-4:45 pm

1 stop15h 25m

$459

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 11/21

5:35 pm-4:45 pm

1 stop29h 10m

Chicago O'Hare Intl

Sun 12/7

7:20 pm-4:45 pm

1 stop15h 25m

$526

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 11/21

5:35 pm-4:45 pm

1 stop29h 10m

Chicago O'Hare Intl

Sun 12/7

7:20 pm-4:45 pm

1 stop15h 25m

$529

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 11/21

9:00 am-3:25 pm

1 stop12h 25m

Chicago O'Hare Intl

Sun 12/7

8:25 pm-8:00 am

1 stop29h 35m

$606

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/13

9:55 pm-8:00 pm

3 stops28h 05m

Chicago O'Hare Intl

Mon 11/17

3:55 pm-10:20 pm

3 stops24h 25m

$711

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/13

8:00 pm-5:55 pm

2 stops27h 55m

Chicago O'Hare Intl

Mon 11/17

7:40 pm-8:30 pm

1 stop18h 50m

$717

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 4/1

6:00 am-12:55 pm

1 stop12h 55m

Chicago O'Hare Intl

Sun 4/5

5:55 pm-11:25 pm

1 stop23h 30m

$768

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 4/1

6:00 am-7:55 pm

1 stop19h 55m

Chicago O'Hare Intl

Sun 4/5

9:40 pm-11:25 pm

1 stop19h 45m

$769

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Mon 12/1

11:03 am-10:30 am

2 stops17h 27m

$771

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

6:30 am-2:20 pm

1 stop13h 50m

Chicago O'Hare Intl

Mon 12/1

5:20 pm-10:30 am

1 stop11h 10m

$772

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Porto to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Porto to Illinois is on a Saturday when prices can be found for as low as $581. Flights from Porto to Illinois on a Friday will generally be more expensive and average around $956. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Cheap Porto to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Porto to Illinois

Direct flights	None

There are no direct flights from Porto to Illinois. There are no popular flight routes from Porto to Illinois.

Search flight deals

When did momondo last update prices for flights from Porto Airport to Illinois?
Prices for flights from Porto Airport to Illinois are refreshed on a daily basis.
How old do you have to be to fly from Porto Airport to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Porto to Illinois?

Finding the right flight to Illinois from Porto is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Porto to Illinois with flexible booking policies on momondo?

Flights from Porto to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Porto to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Porto.

I’m not ready to book a flight from Porto to Illinois right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Porto to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.