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.

$357 Cheap Flights from Porto to Illinois in 2026

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Find the cheapest flights from Porto to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:30 pm - 4:00 pm

OPO

ORD

23h 30m

1 stop

6:05 pm - 7:00 pm

ORD

OPO

18h 55m

1 stop

$629TAP AIR PORTUGAL

Thu, Apr 16 - Sat, May 2

10:30 pm - 4:00 pm

OPO

ORD

23h 30m

1 stop

6:05 pm - 7:00 pm

ORD

OPO

18h 55m

1 stop

$638TAP AIR PORTUGAL

Thu, Apr 16 - Sat, May 2

10:30 pm - 4:00 pm

OPO

ORD

23h 30m

1 stop

6:05 pm - 11:15 pm

ORD

OPO

23h 10m

1 stop

$640TAP AIR PORTUGAL

Thu, Apr 16 - Sat, May 2

10:00 pm - 2:15 pm

OPO

ORD

22h 15m

2 stops

4:20 pm - 9:40 pm

ORD

OPO

23h 20m

2 stops

$748Multiple Airlines

Thu, Apr 23 - Fri, May 1

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

8:10 pm - 11:30 pm

ORD

OPO

21h 20m

1 stop

$755Turkish Airlines

Tue, Jun 2 - Thu, Aug 6

11:00 am - 9:40 am

OPO

ORD

28h 40m

1 stop

11:25 am - 10:00 am

ORD

OPO

16h 35m

1 stop

$756Turkish Airlines

Thu, Apr 16 - Wed, Apr 29

10:00 pm - 6:15 pm

OPO

ORD

26h 15m

3 stops

10:25 pm - 8:00 am

ORD

OPO

27h 35m

3 stops

$798Multiple Airlines

Wed, May 6 - Sun, May 10

6:00 am - 11:57 pm

OPO

STL

23h 57m

2 stops

6:15 am - 9:45 am

STL

OPO

21h 30m

1 stop

$927United Airlines

Fri, Apr 10 - Tue, Apr 14

9:00 am - 4:07 pm

OPO

STL

13h 07m

1 stop

1:05 pm - 6:50 am

STL

OPO

11h 45m

1 stop

$1,000United Airlines

Wed, Jun 3 - Sun, Jun 7

8:20 am - 4:59 pm

OPO

STL

38h 39m

2 stops

5:14 am - 7:40 am

STL

OPO

20h 26m

2 stops

$1,071American Airlines

Wed, Jun 3 - Sun, Jun 7

Delta flights from Porto to Illinois

Our best Delta deals on Porto to Illinois flight tickets

Delta

Apr 16

OPO5:00 amPorto

15h 15m

1 stop

ORD2:15 pmChicago O'Hare Intl

May 2

ORD5:04 pmChicago O'Hare Intl

16h 21m

2 stops

OPO3:25 pmPorto

$821

Delta

Apr 16

OPO5:00 amPorto

15h 15m

1 stop

ORD2:15 pmChicago O'Hare Intl

May 2

ORD5:10 pmChicago O'Hare Intl

16h 15m

1 stop

OPO3:25 pmPorto

$822

Delta

Apr 16

OPO5:00 amPorto

21h 40m

2 stops

ORD8:40 pmChicago O'Hare Intl

May 2

ORD5:04 pmChicago O'Hare Intl

16h 21m

2 stops

OPO3:25 pmPorto

$823

Turkish Airlines flights from Porto to Illinois

Our best Turkish Airlines deals on Porto to Illinois flight tickets

Turkish Airlines

Jun 2

OPO10:40 amPorto

29h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

Aug 6

ORD8:10 pmChicago O'Hare Intl

21h 20m

1 stop

OPO11:30 pmPorto

$755

Turkish Airlines

Apr 16

OPO11:00 amPorto

28h 40m

1 stop

ORD9:40 amChicago O'Hare Intl

Apr 29

ORD11:25 amChicago O'Hare Intl

16h 35m

1 stop

OPO10:00 amPorto

$756

Turkish Airlines

Jul 3

OPO10:40 amPorto

29h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

Jul 12

ORD11:25 amChicago O'Hare Intl

16h 15m

1 stop

OPO9:40 amPorto

$856

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/16

10:30 pm-4:00 pm

1 stop23h 30m

Chicago O'Hare Intl

Sat 5/2

6:05 pm-7:00 pm

1 stop18h 55m

$629

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/16

10:30 pm-4:00 pm

1 stop23h 30m

Chicago O'Hare Intl

Sat 5/2

6:05 pm-7:00 pm

1 stop18h 55m

$638

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/16

10:30 pm-4:00 pm

1 stop23h 30m

Chicago O'Hare Intl

Sat 5/2

6:05 pm-11:15 pm

1 stop23h 10m

$640

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/23

10:00 pm-2:15 pm

2 stops22h 15m

Chicago O'Hare Intl

Fri 5/1

4:20 pm-9:40 pm

2 stops23h 20m

$748

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 6/2

10:40 am-9:40 am

1 stop29h 00m

Chicago O'Hare Intl

Thu 8/6

8:10 pm-11:30 pm

1 stop21h 20m

$755

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/16

11:00 am-9:40 am

1 stop28h 40m

Chicago O'Hare Intl

Wed 4/29

11:25 am-10:00 am

1 stop16h 35m

$756

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 5/6

10:00 pm-6:15 pm

3 stops26h 15m

Chicago O'Hare Intl

Sun 5/10

10:25 pm-8:00 am

3 stops27h 35m

$798

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Fri 4/10

6:00 am-11:57 pm

2 stops23h 57m

Lambert-St Louis

Tue 4/14

6:15 am-9:45 am

1 stop21h 30m

$927

Quickest round-trip

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Wed 6/3

9:00 am-4:07 pm

1 stop13h 07m

Lambert-St Louis

Sun 6/7

1:05 pm-6:50 am

1 stop11h 45m

$1,000

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Wed 6/3

8:20 am-4:59 pm

2 stops38h 39m

Lambert-St Louis

Sun 6/7

5:14 am-7:40 am

2 stops20h 26m

$1,071

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

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

Iberia and British Airways are the most popular carriers operating from Porto to Illinois

Cheap Porto to Illinois flight deals and tips

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

Fastest flight time	15h 30m
Direct flights	None

The fastest flight from Porto to Illinois takes 15h 30m

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.