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Cheap flights from Portugal to Illinois from $376

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 5/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portugal to Illinois

Recent round-trip flight deals from Portugal to Illinois

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
10:55 pm - 4:10 pm
LIS
-
ORD
23h 15m
1 stop
Scandinavian Airlines Logo
7:15 pm - 3:35 pm
ORD
-
LIS
14h 20m
1 stop
$776Scandinavian Airlines
Sat, May 16 - Tue, May 26
Scandinavian Airlines Logo
4:25 pm - 9:28 am
LIS
-
ORD
47h 03m
2 stops
Scandinavian Airlines Logo
7:15 pm - 3:35 pm
ORD
-
LIS
14h 20m
1 stop
$780Scandinavian Airlines
Wed, Aug 26 - Fri, Sep 11
Aer Lingus Logo
10:15 pm - 2:00 pm
LIS
-
ORD
21h 45m
1 stop
Aer Lingus Logo
9:00 pm - 9:35 pm
ORD
-
LIS
18h 35m
1 stop
$787Aer Lingus
Fri, May 15 - Mon, May 18
Aer Lingus Logo
10:15 pm - 2:00 pm
LIS
-
ORD
21h 45m
1 stop
Aer Lingus Logo
9:00 pm - 9:35 pm
ORD
-
LIS
18h 35m
1 stop
$790Aer Lingus
Wed, Jun 3 - Sat, Jun 13
Scandinavian Airlines Logo
4:25 pm - 4:10 pm
LIS
-
ORD
29h 45m
1 stop
Scandinavian Airlines Logo
7:15 pm - 3:35 pm
ORD
-
LIS
14h 20m
1 stop
$795Scandinavian Airlines
Wed, Aug 26 - Fri, Sep 11
Multiple Airlines Logo
7:00 am - 2:25 pm
OPO
-
ORD
13h 25m
1 stop
Multiple Airlines Logo
4:55 pm - 5:50 pm
ORD
-
OPO
18h 55m
1 stop
$825Multiple Airlines
Thu, Apr 30 - Tue, May 5
Multiple Airlines Logo
6:35 am - 2:25 pm
LIS
-
ORD
13h 50m
1 stop
Multiple Airlines Logo
3:45 pm - 12:40 pm
ORD
-
LIS
14h 55m
1 stop
$828Multiple Airlines
Sun, Jul 26 - Mon, Aug 24
Turkish Airlines Logo
10:45 am - 9:40 am
OPO
-
ORD
28h 55m
1 stop
Turkish Airlines Logo
8:10 pm - 11:30 pm
ORD
-
OPO
21h 20m
1 stop
$865Turkish Airlines
Wed, Sep 23 - Thu, Oct 1
KLM Logo
9:45 pm - 2:15 pm
FAO
-
ORD
22h 30m
1 stop
KLM Logo
4:20 pm - 7:10 am
ORD
-
FAO
32h 50m
1 stop
$924KLM
Mon, Jun 15 - Sat, Sep 12
KLM Logo
9:45 pm - 4:26 pm
FAO
-
ORD
24h 41m
2 stops
KLM Logo
4:20 pm - 6:05 pm
ORD
-
FAO
19h 45m
1 stop
$928KLM
Mon, Jun 15 - Sat, Sep 12

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LOT flights from Portugal to Illinois

Our best LOT deals on Portugal to Illinois flight tickets
LOT
Jul 15
LIS1:35 pmLisbon Humberto Delgado
31h 35m
1 stop
ORD3:10 pmChicago O'Hare Intl
Jul 24
ORD8:10 pmChicago O'Hare Intl
14h 50m
1 stop
LIS5:00 pmLisbon Humberto Delgado
$859
LOT
Jul 15
LIS1:35 pmLisbon Humberto Delgado
31h 35m
1 stop
ORD3:10 pmChicago O'Hare Intl
Jul 24
ORD9:50 pmChicago O'Hare Intl
33h 40m
1 stop
LIS1:30 pmLisbon Humberto Delgado
$872
LOT
Jul 15
LIS1:35 pmLisbon Humberto Delgado
31h 30m
2 stops
ORD3:05 pmChicago O'Hare Intl
Jul 24
ORD9:50 pmChicago O'Hare Intl
29h 50m
1 stop
LIS9:40 amLisbon Humberto Delgado
$879

United Airlines flights from Portugal to Illinois

Our best United Airlines deals on Portugal to Illinois flight tickets
United Airlines
Oct 7
OPO12:35 pmPorto
14h 25m
1 stop
ORD9:00 pmChicago O'Hare Intl
Oct 10
ORD4:40 pmChicago O'Hare Intl
11h 05m
1 stop
OPO9:45 amPorto
$879
United Airlines
May 11
OPO6:00 amPorto
14h 50m
1 stop
ORD2:50 pmChicago O'Hare Intl
May 25
ORD4:40 pmChicago O'Hare Intl
11h 05m
1 stop
OPO9:45 amPorto
$911
United Airlines
May 11
OPO6:00 amPorto
14h 50m
1 stop
ORD2:50 pmChicago O'Hare Intl
May 25
ORD11:03 amChicago O'Hare Intl
16h 42m
2 stops
OPO9:45 amPorto
$912

momondo Fare Finder

 
Customize your flight search to find flights from Portugal to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 20, 2026.
Use the filters below to find and compare flights from Portugal to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sat 5/16

10:55 pm-4:10 pm

1 stop23h 15m

Chicago O'Hare Intl

Tue 5/26

7:15 pm-3:35 pm

1 stop14h 20m

$776

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 8/26

4:25 pm-9:28 am

2 stops47h 03m

Chicago O'Hare Intl

Fri 9/11

7:15 pm-3:35 pm

1 stop14h 20m

$780

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 5/15

10:15 pm-2:00 pm

1 stop21h 45m

Chicago O'Hare Intl

Mon 5/18

9:00 pm-9:35 pm

1 stop18h 35m

$787

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 6/3

10:15 pm-2:00 pm

1 stop21h 45m

Chicago O'Hare Intl

Sat 6/13

9:00 pm-9:35 pm

1 stop18h 35m

$790

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 8/26

4:25 pm-4:10 pm

1 stop29h 45m

Chicago O'Hare Intl

Fri 9/11

7:15 pm-3:35 pm

1 stop14h 20m

$795

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/30

7:00 am-2:25 pm

1 stop13h 25m

Chicago O'Hare Intl

Tue 5/5

4:55 pm-5:50 pm

1 stop18h 55m

$825
Quickest round-trip

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sun 7/26

6:35 am-2:25 pm

1 stop13h 50m

Chicago O'Hare Intl

Mon 8/24

3:45 pm-12:40 pm

1 stop14h 55m

$828

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 9/23

10:45 am-9:40 am

1 stop28h 55m

Chicago O'Hare Intl

Thu 10/1

8:10 pm-11:30 pm

1 stop21h 20m

$865

FaroChicago

FAO - ORD

FAOORD

Faro

Mon 6/15

9:45 pm-2:15 pm

1 stop22h 30m

Chicago O'Hare Intl

Sat 9/12

4:20 pm-7:10 am

1 stop32h 50m

$924

FaroChicago

FAO - ORD

FAOORD

Faro

Mon 6/15

9:45 pm-4:26 pm

2 stops24h 41m

Chicago O'Hare Intl

Sat 9/12

4:20 pm-6:05 pm

1 stop19h 45m

$928

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

The cheapest month to fly to Illinois from Portugal is in February. Flight prices, which tend to average around $587, 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 December is also cheap. Prices for this month can be found on momondo for an average of $729.

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 $1,205. 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 $1,056.

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?

No. A direct flight is the cheapest option for a flight between 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

Fastest flight time

9h 20m

Direct flights

Mon, Thu, Fri, Sat 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, Saturday and Sunday. The only airline offering direct flights is TAP AIR PORTUGAL.
There are 98 airports in Illinois. From Portugal there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

Frequently asked questions about flying 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?

  • 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?

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 PORTUGALPriceFrom $665Free CancellationRating
7.1
2,212 reviews
Search TAP AIR PORTUGAL 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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