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

TAP AIR PORTUGAL, Turkish Airlines, and Iberia 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.

$349 Cheap Flights from Porto to Illinois in 2025

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Find the cheapest flights from Porto to Illinois

Round-trip

One-way

Cheap round-trip flights

9:15 pm - 4:30 pmOPO-ORD

25h 15m1 stop

6:00 pm - 5:00 pmORD-OPO

17h 00m1 stop

$542TAP AIR PORTUGAL

Find Deal

jue., sep. 18 - jue., oct. 2

10:25 pm - 4:30 pmOPO-ORD

24h 05m1 stop

6:00 pm - 11:00 pmORD-OPO

23h 00m1 stop

$567TAP AIR PORTUGAL

Find Deal

jue., sep. 18 - jue., oct. 2

4:55 pm - 4:10 pmOPO-ORD

29h 15m2 stops

6:00 pm - 10:35 pmORD-OPO

22h 35m2 stops

$674

Find Deal

jue., ago. 28 - dom., sep. 28

6:30 am - 2:20 pmOPO-ORD

13h 50m1 stop

5:20 pm - 10:30 amORD-OPO

11h 10m1 stop

$675Delta

Find Deal

lun., nov. 24 - lun., dic. 1

6:30 am - 2:10 pmOPO-ORD

13h 40m1 stop

2:05 pm - 3:30 pmORD-OPO

19h 25m2 stops

$677Delta

Find Deal

jue., sep. 18 - jue., oct. 2

10:40 pm - 12:50 pmOPO-ORD

20h 10m2 stops

6:00 pm - 9:00 pmORD-OPO

21h 00m2 stops

$682

Find Deal

mié., ago. 27 - vie., sep. 26

6:30 am - 2:10 pmOPO-ORD

13h 40m1 stop

5:10 pm - 3:30 pmORD-OPO

16h 20m1 stop

$683KLM

Find Deal

jue., sep. 18 - jue., oct. 2

8:15 am - 2:15 pmOPO-ORD

12h 00m1 stop

4:30 pm - 7:55 pmORD-OPO

21h 25m1 stop

$687Iberia

Find Deal

mié., ago. 27 - vie., sep. 26

6:30 am - 5:59 pmOPO-ORD

17h 29m2 stops

5:10 pm - 3:30 pmORD-OPO

16h 20m1 stop

$688KLM

Find Deal

jue., sep. 18 - jue., oct. 2

8:15 am - 7:45 pmOPO-ORD

17h 30m2 stops

4:30 pm - 11:40 amORD-OPO

13h 10m1 stop

$698Iberia

Find Deal

sáb., sep. 13 - sáb., sep. 20

KLM flights from Porto to Illinois

Our best KLM deals on Porto to Illinois flight tickets

KLM

Sep 18

OPO6:30 amPorto

13h 40m

1 stop

ORD2:10 pmChicago O'Hare Intl

Oct 2

ORD5:10 pmChicago O'Hare Intl

16h 20m

1 stop

OPO3:30 pmPorto

$683

Find similar

KLM

Sep 18

OPO6:30 amPorto

17h 29m

2 stops

ORD5:59 pmChicago O'Hare Intl

Oct 2

ORD5:10 pmChicago O'Hare Intl

16h 20m

1 stop

OPO3:30 pmPorto

$688

Find similar

KLM

Sep 13

OPO7:00 pmPorto

25h 10m

1 stop

ORD2:10 pmChicago O'Hare Intl

Sep 20

ORD4:15 pmChicago O'Hare Intl

12h 25m

1 stop

OPO10:40 amPorto

$689

Find similar

American Airlines flights from Porto to Illinois

Our best American Airlines deals on Porto to Illinois flight tickets

American Airlines

Sep 18

OPO8:15 amPorto

12h 00m

1 stop

ORD2:15 pmChicago O'Hare Intl

Oct 2

ORD4:30 pmChicago O'Hare Intl

13h 10m

1 stop

OPO11:40 amPorto

$692

Find similar

American Airlines

Aug 27

OPO8:15 amPorto

12h 00m

1 stop

ORD2:15 pmChicago O'Hare Intl

Sep 26

ORD11:46 amChicago O'Hare Intl

13h 49m

2 stops

OPO7:35 amPorto

$697

Find similar

American Airlines

Oct 10

OPO8:15 amPorto

17h 30m

2 stops

ORD7:45 pmChicago O'Hare Intl

Oct 17

ORD9:41 amChicago O'Hare Intl

15h 54m

2 stops

OPO7:35 amPorto

$699

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

9:15 pm-4:30 pm

1 stop25h 15m

Chicago O'Hare Intl

jue. 10/2

6:00 pm-5:00 pm

1 stop17h 00m

$542

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

10:25 pm-4:30 pm

1 stop24h 05m

Chicago O'Hare Intl

jue. 10/2

6:00 pm-11:00 pm

1 stop23h 00m

$567

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 8/28

4:55 pm-4:10 pm

2 stops29h 15m

Chicago O'Hare Intl

dom. 9/28

6:00 pm-10:35 pm

2 stops22h 35m

$674

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

$675

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

jue. 10/2

2:05 pm-3:30 pm

2 stops19h 25m

$677

PortoChicago

OPO - ORD

OPOORD

Porto

mié. 8/27

10:40 pm-12:50 pm

2 stops20h 10m

Chicago O'Hare Intl

vie. 9/26

6:00 pm-9:00 pm

2 stops21h 00m

$682

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

jue. 10/2

5:10 pm-3:30 pm

1 stop16h 20m

$683

PortoChicago

OPO - ORD

OPOORD

Porto

mié. 8/27

8:15 am-2:15 pm

1 stop12h 00m

Chicago O'Hare Intl

vie. 9/26

4:30 pm-7:55 pm

1 stop21h 25m

$687

PortoChicago

OPO - ORD

OPOORD

Porto

jue. 9/18

6:30 am-5:59 pm

2 stops17h 29m

Chicago O'Hare Intl

jue. 10/2

5:10 pm-3:30 pm

1 stop16h 20m

$688

PortoChicago

OPO - ORD

OPOORD

Porto

sáb. 9/13

8:15 am-7:45 pm

2 stops17h 30m

Chicago O'Hare Intl

sáb. 9/20

4:30 pm-11:40 am

1 stop13h 10m

$698

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

Best Price Found	$349
Fastest flight time	11h 30m
Direct flights	None
Airports in Illinois	2 airports

The best one-way flight to Illinois from Porto in the past 72 hours is $349. The best round-trip flight deal from Porto to Illinois found on momondo in the last 72 hours is $542.

The fastest flight from Porto to Illinois takes 11h 30m

There are no direct flights from Porto to Illinois. Popular non-direct route for this connection is Porto Airport - Chicago O'Hare Intl Airport.

There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Lambert-St Louis (STL)

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.