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 41% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Portugal to Illinois on average per week?

As of December 2025, there are 2 flights per week flying from Portugal to Illinois. The most common day of the week flights depart is Sun, with 100% of flights taking off on this day.

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 05m.

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

Scandinavian Airlines is the most popular carrier 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 5 as of December 2025.

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.

$265 Cheap Flights from Portugal to Illinois in 2025/26

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Recent round-trip flight deals from Portugal to Illinois

Enter your travel dates to find the best prices.

4:55 pm - 4:45 pmLIS-ORD

29h 50m1 stop

7:10 pm - 4:05 pmORD-LIS

14h 55m1 stop

$412Scandinavian Airlines

Find Deal

Sun, Jan 18 - Sun, Feb 1

4:55 pm - 4:45 pmLIS-ORD

29h 50m1 stop

7:10 pm - 4:05 pmORD-LIS

14h 55m1 stop

$414Scandinavian Airlines

Find Deal

Sun, Jan 18 - Sun, Feb 1

8:55 am - 3:00 pmOPO-ORD

12h 05m1 stop

7:10 pm - 1:05 pmORD-OPO

11h 55m1 stop

$562TAP AIR PORTUGAL

Find Deal

Wed, Jan 14 - Wed, Jan 21

6:00 pm - 3:25 pmOPO-ORD

27h 25m1 stop

7:10 pm - 6:00 pmORD-OPO

16h 50m1 stop

$568TAP AIR PORTUGAL

Find Deal

Thu, Jan 15 - Wed, Jan 28

11:05 am - 9:51 pmLIS-STL

16h 46m2 stops

2:54 pm - 9:55 pmSTL-LIS

25h 01m2 stops

$715American Airlines

Find Deal

Fri, Jan 16 - Mon, Jan 19

6:30 am - 6:14 pmLIS-STL

17h 44m2 stops

2:54 pm - 12:10 pmSTL-LIS

15h 16m2 stops

$723American Airlines

Find Deal

Wed, Jan 14 - Wed, Jan 21

5:00 am - 5:34 pmLIS-MDW

18h 34m2 stops

6:35 pm - 3:10 pmMDW-LIS

14h 35m2 stops

$730Delta

Find Deal

Sun, Jan 18 - Sun, Feb 1

5:00 am - 5:34 pmLIS-MDW

18h 34m2 stops

9:32 am - 11:20 amMDW-LIS

19h 48m2 stops

$731Delta

Find Deal

Wed, Jan 14 - Wed, Jan 21

9:15 am - 2:20 pmFAO-ORD

35h 05m1 stop

11:05 am - 6:25 pmORD-FAO

25h 20m2 stops

$800KLM

Find Deal

Fri, Jan 16 - Sun, Jan 18

8:10 pm - 2:20 pmFAO-ORD

24h 10m1 stop

1:55 pm - 6:25 pmORD-FAO

22h 30m2 stops

$801KLM

Find Deal

Fri, Jan 16 - Sun, Jan 18

Scandinavian Airlines flights from Portugal to Illinois

Our best Scandinavian Airlines deals on Portugal to Illinois flight tickets

Scandinavian Airlines

Jan 18

LIS4:55 pmLisbon Humberto Delgado

29h 50m

1 stop

ORD4:45 pmChicago O'Hare Intl

Feb 1

ORD7:10 pmChicago O'Hare Intl

14h 55m

1 stop

LIS4:05 pmLisbon Humberto Delgado

$412

Find similar

Scandinavian Airlines

Jan 18

LIS4:55 pmLisbon Humberto Delgado

29h 50m

1 stop

ORD4:45 pmChicago O'Hare Intl

Feb 1

ORD7:10 pmChicago O'Hare Intl

14h 55m

1 stop

LIS4:05 pmLisbon Humberto Delgado

$414

Find similar

Scandinavian Airlines

Jan 18

LIS4:55 pmLisbon Humberto Delgado

29h 50m

1 stop

ORD4:45 pmChicago O'Hare Intl

Feb 1

ORD7:10 pmChicago O'Hare Intl

14h 55m

1 stop

LIS4:05 pmLisbon Humberto Delgado

$416

Find similar

TAP AIR PORTUGAL flights from Portugal to Illinois

Our best TAP AIR PORTUGAL deals on Portugal to Illinois flight tickets

TAP AIR PORTUGAL

Jan 18

LIS11:10 amLisbon Humberto Delgado

9h 35m

ORD2:45 pmChicago O'Hare Intl

Feb 1

ORD8:25 pmChicago O'Hare Intl

7h 55m

LIS10:20 amLisbon Humberto Delgado

$552

Find similar

TAP AIR PORTUGAL

Jan 14

OPO8:55 amPorto

12h 05m

1 stop

ORD3:00 pmChicago O'Hare Intl

Jan 21

ORD7:10 pmChicago O'Hare Intl

11h 55m

1 stop

OPO1:05 pmPorto

$562

Find similar

TAP AIR PORTUGAL

Jan 15

OPO6:00 pmPorto

27h 25m

1 stop

ORD3:25 pmChicago O'Hare Intl

Jan 28

ORD7:10 pmChicago O'Hare Intl

16h 50m

1 stop

OPO6:00 pmPorto

$568

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sun 1/18

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Sun 2/1

7:10 pm-4:05 pm

1 stop14h 55m

$412

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sun 1/18

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Sun 2/1

7:10 pm-4:05 pm

1 stop14h 55m

$414

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 1/14

8:55 am-3:00 pm

1 stop12h 05m

Chicago O'Hare Intl

Wed 1/21

7:10 pm-1:05 pm

1 stop11h 55m

$562

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 1/15

6:00 pm-3:25 pm

1 stop27h 25m

Chicago O'Hare Intl

Wed 1/28

7:10 pm-6:00 pm

1 stop16h 50m

$568

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

Fri 1/16

11:05 am-9:51 pm

2 stops16h 46m

Lambert-St Louis

Mon 1/19

2:54 pm-9:55 pm

2 stops25h 01m

$715

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

Wed 1/14

6:30 am-6:14 pm

2 stops17h 44m

Lambert-St Louis

Wed 1/21

2:54 pm-12:10 pm

2 stops15h 16m

$723

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Sun 1/18

5:00 am-5:34 pm

2 stops18h 34m

Chicago Midway

Sun 2/1

6:35 pm-3:10 pm

2 stops14h 35m

$730

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Wed 1/14

5:00 am-5:34 pm

2 stops18h 34m

Chicago Midway

Wed 1/21

9:32 am-11:20 am

2 stops19h 48m

$731

FaroChicago

FAO - ORD

FAOORD

Faro

Fri 1/16

9:15 am-2:20 pm

1 stop35h 05m

Chicago O'Hare Intl

Sun 1/18

11:05 am-6:25 pm

2 stops25h 20m

$800

FaroChicago

FAO - ORD

FAOORD

Faro

Fri 1/16

8:10 pm-2:20 pm

1 stop24h 10m

Chicago O'Hare Intl

Sun 1/18

1:55 pm-6:25 pm

2 stops22h 30m

$801

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 $643, 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 $748. Flights from Portugal to Illinois on a Friday will generally be more expensive and average around $1,209. 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 in the evening. Flights from Portugal to Illinois during this time can be as low as $622. Flights in the morning are often more expensive with an average ticket price of $1,095.

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 14% 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

Best Price Found	$549
Fastest flight time	9h 20m
Direct flights	Mon, Thu, Sat and Sun
Airports in Illinois	1 airport

The best one-way flight to Illinois from Portugal in the past 72 hours is $549. The best round-trip flight deal from Portugal to Illinois found on momondo in the last 72 hours is $529.

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

Direct flights go from Portugal to Illinois on Monday, Thursday, Saturday and Sunday. The only airline offering direct flights is TAP AIR PORTUGAL.

There is 1 airport near Illinois: 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 5 as of December 2025.
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 (58.00% of total bookings). The next most popular plane models are Airbus A330 (28.00%) and Airbus A330-200 (14.00%).

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
TAP AIR PORTUGAL	PriceFrom $580	Free Cancellation	Rating 7.1 2,078 reviews	Search TAP AIR PORTUGAL flights
Delta	PriceFrom $650	Free Cancellation	Rating 7.9 8,010 reviews	Search Delta flights
KLM	PriceFrom $653	Free Cancellation	Rating 7.7 1,425 reviews	Search KLM flights
Aer Lingus	PriceFrom $669	Free Cancellation	Rating 7.2 1,384 reviews	Search Aer Lingus flights
United Airlines	PriceFrom $734	Free Cancellation	Rating 7.4 9,059 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.

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Find better results for your trip to Illinois

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Cheap flights from Portugal to Illinois from $265

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Illinois departing on 1/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

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Find the cheapest flights from Portugal to Illinois

Recent round-trip flight deals from Portugal to Illinois

Recent one-way flight deals from Portugal to Illinois

Recent last minute flight deals from Portugal to Illinois

Recent direct flight deals from Portugal to Illinois

Scandinavian Airlines flights from Portugal to Illinois

Our best Scandinavian Airlines deals on Portugal to Illinois flight tickets

TAP AIR PORTUGAL flights from Portugal to Illinois

Our best TAP AIR PORTUGAL deals on Portugal to Illinois flight tickets

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Use the filters below to find and compare flights from Portugal to Illinois that are best for you.

See travel insights to Illinois from

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

What is the cheapest month to fly to Illinois?

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

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 in the evening. Flights from Portugal to Illinois during this time can be as low as $622. Flights in the morning are often more expensive with an average ticket price of $1,095.

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 14% on your flight if you consider stops on a Portugal to Illinois flight.

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

Scandinavian Airlines is the most popular carrier operating from Portugal to Illinois

What airlines fly to Illinois?

How many flights depart from Portugal to Illinois on average per week?

As of December 2025, there are 2 flights per week flying from Portugal to Illinois. The most common day of the week flights depart is Sun, with 100% of flights taking off on this day.

How long is the flight from Portugal to Illinois?

Cheap Portugal to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

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

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

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

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

What is the most popular plane model from Portugal to Illinois?

Best airlines flying from Portugal to Illinois

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

Why use momondo?

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

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

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

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

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo