What airlines fly to Illinois?

TAP AIR PORTUGAL, KLM and United Airlines are the top three most popular airlines that fly to Illinois from Portugal according to our data. TAP AIR PORTUGAL is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How long is the flight from Portugal to Illinois?

The flight from Portugal to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Lisbon (a popular airport in Portugal) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 9h 20m on average. If you fly from Porto (another popular airport in Portugal) to Chicago O'Hare Intl Airport, then the average flight time is 12h 25m.

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

British Airways, Iberia, and JetBlue are the most popular carriers operating from Portugal to Illinois

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

Prices for flights from Portugal to Illinois were last updated today.

How many operators does momondo search for flights from Portugal to Illinois?

The number of operators available for flights from Portugal to Illinois is 4 as of March 2026.

How old do you have to be to fly from Portugal to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portugal to Illinois.

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

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$301 Cheap Flights from Portugal to Illinois in 2026

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Find the cheapest flights from Portugal to Illinois

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Portugal to Illinois

Enter your travel dates to find the best prices.

7:45 pm - 2:15 pm

LIS

ORD

24h 30m

1 stop

5:10 pm - 11:15 am

ORD

LIS

12h 05m

1 stop

$535Multiple Airlines

Thu, Apr 2 - Sun, Apr 12

7:10 am - 6:15 pm

LIS

ORD

17h 05m

1 stop

7:05 pm - 6:00 pm

ORD

LIS

16h 55m

1 stop

$538British Airways

Mon, May 25 - Fri, Jul 3

5:35 am - 6:31 pm

LIS

ORD

18h 56m

2 stops

5:10 pm - 11:15 am

ORD

LIS

12h 05m

1 stop

$547Delta

Thu, Apr 2 - Sun, Apr 12

9:00 am - 4:00 pm

OPO

ORD

13h 00m

1 stop

6:00 pm - 10:55 pm

ORD

OPO

22h 55m

1 stop

$573TAP AIR PORTUGAL

Fri, Apr 17 - Fri, Apr 24

10:00 am - 4:00 pm

OPO

ORD

12h 00m

1 stop

6:00 pm - 10:55 am

ORD

OPO

10h 55m

1 stop

$617TAP AIR PORTUGAL

Sun, Apr 19 - Sun, Apr 26

11:25 am - 4:10 pm

OPO

ORD

33h 45m

1 stop

4:20 pm - 6:10 pm

ORD

OPO

19h 50m

1 stop

$620KLM

Sun, Mar 15 - Sun, Apr 26

8:00 pm - 5:35 pm

FAO

ORD

27h 35m

1 stop

9:45 am - 12:00 pm

ORD

FAO

20h 15m

2 stops

$684American Airlines

Wed, Jun 3 - Sun, Jun 14

8:00 pm - 3:54 pm

FAO

ORD

25h 54m

2 stops

9:45 am - 12:00 pm

ORD

FAO

20h 15m

2 stops

$690American Airlines

Wed, Jun 3 - Sun, Jun 14

6:00 am - 11:11 pm

OPO

STL

23h 11m

2 stops

7:45 am - 9:45 am

STL

OPO

20h 00m

2 stops

$847United Airlines

Fri, Apr 10 - Wed, Apr 15

5:05 am - 1:25 pm

LIS

STL

14h 20m

1 stop

11:15 am - 10:30 am

STL

LIS

17h 15m

2 stops

$850United Airlines

Fri, Apr 3 - Tue, Apr 7

British Airways flights from Portugal to Illinois

Our best British Airways deals on Portugal to Illinois flight tickets

British Airways

May 25

LIS7:10 amLisbon Humberto Delgado

17h 05m

1 stop

ORD6:15 pmChicago O'Hare Intl

Jul 3

ORD7:05 pmChicago O'Hare Intl

16h 55m

1 stop

LIS6:00 pmLisbon Humberto Delgado

$538

British Airways

May 29

LIS7:20 amLisbon Humberto Delgado

16h 55m

1 stop

ORD6:15 pmChicago O'Hare Intl

Jul 2

ORD9:15 pmChicago O'Hare Intl

14h 55m

1 stop

LIS6:10 pmLisbon Humberto Delgado

$548

British Airways

May 31

LIS7:20 amLisbon Humberto Delgado

16h 55m

1 stop

ORD6:15 pmChicago O'Hare Intl

Jul 3

ORD7:05 pmChicago O'Hare Intl

16h 55m

1 stop

LIS6:00 pmLisbon Humberto Delgado

$551

Delta flights from Portugal to Illinois

Our best Delta deals on Portugal to Illinois flight tickets

Delta

Apr 2

LIS5:35 amLisbon Humberto Delgado

18h 56m

2 stops

ORD6:31 pmChicago O'Hare Intl

Apr 12

ORD5:10 pmChicago O'Hare Intl

12h 05m

1 stop

LIS11:15 amLisbon Humberto Delgado

$547

Delta

Apr 20

LIS5:35 amLisbon Humberto Delgado

19h 24m

2 stops

ORD6:59 pmChicago O'Hare Intl

May 29

ORD5:10 pmChicago O'Hare Intl

12h 05m

1 stop

LIS11:15 amLisbon Humberto Delgado

$616

Delta

May 23

LIS5:00 amLisbon Humberto Delgado

15h 15m

1 stop

ORD2:15 pmChicago O'Hare Intl

Jun 2

ORD10:25 amChicago O'Hare Intl

18h 30m

2 stops

LIS10:55 amLisbon Humberto Delgado

$694

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 4/2

7:45 pm-2:15 pm

1 stop24h 30m

Chicago O'Hare Intl

Sun 4/12

5:10 pm-11:15 am

1 stop12h 05m

$535

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Mon 5/25

7:10 am-6:15 pm

1 stop17h 05m

Chicago O'Hare Intl

Fri 7/3

7:05 pm-6:00 pm

1 stop16h 55m

$538

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Thu 4/2

5:35 am-6:31 pm

2 stops18h 56m

Chicago O'Hare Intl

Sun 4/12

5:10 pm-11:15 am

1 stop12h 05m

$547

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 4/17

9:00 am-4:00 pm

1 stop13h 00m

Chicago O'Hare Intl

Fri 4/24

6:00 pm-10:55 pm

1 stop22h 55m

$573

Quickest round-trip

PortoChicago

OPO - ORD

OPOORD

Porto

Sun 4/19

10:00 am-4:00 pm

1 stop12h 00m

Chicago O'Hare Intl

Sun 4/26

6:00 pm-10:55 am

1 stop10h 55m

$617

PortoChicago

OPO - ORD

OPOORD

Porto

Sun 3/15

11:25 am-4:10 pm

1 stop33h 45m

Chicago O'Hare Intl

Sun 4/26

4:20 pm-6:10 pm

1 stop19h 50m

$620

FaroChicago

FAO - ORD

FAOORD

Faro

Wed 6/3

8:00 pm-5:35 pm

1 stop27h 35m

Chicago O'Hare Intl

Sun 6/14

9:45 am-12:00 pm

2 stops20h 15m

$684

FaroChicago

FAO - ORD

FAOORD

Faro

Wed 6/3

8:00 pm-3:54 pm

2 stops25h 54m

Chicago O'Hare Intl

Sun 6/14

9:45 am-12:00 pm

2 stops20h 15m

$690

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Fri 4/10

6:00 am-11:11 pm

2 stops23h 11m

Lambert-St Louis

Wed 4/15

7:45 am-9:45 am

2 stops20h 00m

$847

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

Fri 4/3

5:05 am-1:25 pm

1 stop14h 20m

Lambert-St Louis

Tue 4/7

11:15 am-10:30 am

2 stops17h 15m

$850

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 Portugal 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

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Portugal is in February. Flight prices, which tend to average around $591, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $710.

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

The cheapest day to depart from Portugal to Illinois is on a Thursday when prices can be found for as low as $884. Flights from Portugal to Illinois on a Friday will generally be more expensive and average around $1,205. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Portugal to Illinois during this time can be as low as $886. Flights in the morning are often more expensive with an average ticket price of $1,083.

What is the cheapest Portugal to Illinois flight route?

Fly from Lisbon Humberto Delgado to Chicago O'Hare Intl for the best Portugal - Illinois flight prices

What cabin class options are available on Portugal to Illinois flights?

There are 3 cabin classes available to choose from on Portugal to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Portugal to Illinois flights?

You could potentially save up to 24% on your flight if you consider stops on a Portugal to Illinois flight.

Cheap Portugal to Illinois flight deals and tips

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

Fastest flight time	9h 20m
Direct flights	Mon, Thu, Fri and Sun
Airports in Illinois	98 airports

The fastest flight from Portugal to Illinois takes 9h 20m

Direct flights go from Portugal to Illinois on Monday, Thursday, Friday and Sunday. There are no airlines offering direct flights.

There are 98 airports in Illinois. From Portugal there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

When did momondo last update prices for flights from Portugal to Illinois?
Prices for flights from Portugal to Illinois were last updated today.
How many operators does momondo search for flights from Portugal to Illinois?
The number of operators available for flights from Portugal to Illinois is 4 as of March 2026.
How old do you have to be to fly from Portugal to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portugal to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Portugal to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portugal to Illinois is Airbus A330-900neo (56.41% of total bookings). The next most popular plane models are Airbus A330 (28.21%) and Airbus A330-200 (15.38%).

Best airlines flying from Portugal to Illinois

Compare and see reviews for airlines that fly from Portugal to Illinois with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $653	Free Cancellation	Rating 7.7 1,465 reviews	Search KLM flights
TAP AIR PORTUGAL	PriceFrom $665	Free Cancellation	Rating 7.1 2,158 reviews	Search TAP AIR PORTUGAL flights
Aer Lingus	PriceFrom $671	Free Cancellation	Rating 7.2 1,467 reviews	Search Aer Lingus flights
United Airlines	PriceFrom $760	Free Cancellation	Rating 7.4 9,396 reviews	Search United Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portugal to Illinois. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Portugal to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Portugal 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 Portugal.

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

If you are not ready to book a flight from Portugal to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.