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Cheap flights from Portugal to Illinois from $309

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 2/2. 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

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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
5:35 pm - 4:45 pm
OPO
-
ORD
29h 10m
1 stop
Scandinavian Airlines Logo
8:20 pm - 4:55 pm
ORD
-
OPO
15h 35m
1 stop
$455Scandinavian Airlines
Fri, Mar 6 - Thu, Mar 19
Scandinavian Airlines Logo
5:35 pm - 4:45 pm
OPO
-
ORD
29h 10m
1 stop
Scandinavian Airlines Logo
8:20 pm - 4:55 pm
ORD
-
OPO
15h 35m
1 stop
$459Scandinavian Airlines
Fri, Mar 6 - Thu, Mar 19
Scandinavian Airlines Logo
5:35 pm - 4:45 pm
OPO
-
ORD
29h 10m
1 stop
Scandinavian Airlines Logo
8:20 pm - 4:45 pm
ORD
-
OPO
15h 25m
1 stop
$469Scandinavian Airlines
Fri, Mar 6 - Sun, Mar 22
Scandinavian Airlines Logo
6:00 pm - 4:45 pm
LIS
-
ORD
28h 45m
1 stop
Scandinavian Airlines Logo
8:20 pm - 4:30 pm
ORD
-
LIS
15h 10m
1 stop
$477Scandinavian Airlines
Sun, Mar 1 - Sun, Mar 8
TAP AIR PORTUGAL Logo
6:55 am - 3:00 pm
OPO
-
ORD
14h 05m
1 stop
TAP AIR PORTUGAL Logo
7:10 pm - 6:00 pm
ORD
-
OPO
16h 50m
1 stop
$557TAP AIR PORTUGAL
Wed, Feb 11 - Wed, Feb 18
Aer Lingus Logo
11:10 am - 7:15 pm
FAO
-
ORD
14h 05m
1 stop
Aer Lingus Logo
9:00 pm - 5:30 pm
ORD
-
FAO
14h 30m
1 stop
$568Aer Lingus
Sat, Jan 31 - Wed, Feb 4
American Airlines Logo
6:35 am - 2:15 pm
LIS
-
ORD
13h 40m
1 stop
American Airlines Logo
9:15 pm - 5:55 pm
ORD
-
LIS
14h 40m
1 stop
$571American Airlines
Fri, Apr 17 - Tue, May 5
American Airlines Logo
8:20 am - 4:00 pm
OPO
-
ORD
13h 40m
1 stop
American Airlines Logo
5:00 pm - 8:00 pm
ORD
-
OPO
21h 00m
2 stops
$575American Airlines
Thu, Jun 4 - Fri, Jun 19
Delta Logo
5:00 am - 5:37 pm
LIS
-
MDW
18h 37m
2 stops
Delta Logo
6:34 pm - 5:30 pm
MDW
-
LIS
17h 56m
2 stops
$735Delta
Sun, Mar 1 - Sun, Mar 8
Delta Logo
5:00 am - 5:55 pm
LIS
-
MDW
18h 55m
2 stops
Delta Logo
1:29 pm - 2:35 pm
MDW
-
LIS
19h 06m
2 stops
$741Delta
Fri, Feb 6 - Sun, Feb 15

TAP AIR PORTUGAL flights from Portugal to Illinois

Our best TAP AIR PORTUGAL deals on Portugal to Illinois flight tickets
TAP AIR PORTUGAL
Feb 11
OPO6:55 amPorto
14h 05m
1 stop
ORD3:00 pmChicago O'Hare Intl
Feb 18
ORD7:10 pmChicago O'Hare Intl
16h 50m
1 stop
OPO6:00 pmPorto
$557
TAP AIR PORTUGAL
Jan 23
LIS11:55 amLisbon Humberto Delgado
9h 30m
ORD3:25 pmChicago O'Hare Intl
Feb 6
ORD8:15 pmChicago O'Hare Intl
8h 00m
LIS10:15 amLisbon Humberto Delgado
$731
TAP AIR PORTUGAL
Mar 1
LIS11:10 amLisbon Humberto Delgado
9h 35m
ORD2:45 pmChicago O'Hare Intl
Mar 8
ORD9:25 pmChicago O'Hare Intl
7h 55m
LIS10:20 amLisbon Humberto Delgado
$756

British Airways flights from Portugal to Illinois

Our best British Airways deals on Portugal to Illinois flight tickets
British Airways
Mar 2
LIS11:05 amLisbon Humberto Delgado
12h 59m
1 stop
ORD6:04 pmChicago O'Hare Intl
Mar 9
ORD10:45 pmChicago O'Hare Intl
15h 10m
1 stop
LIS6:55 pmLisbon Humberto Delgado
$564
British Airways
Jan 23
LIS11:05 amLisbon Humberto Delgado
15h 10m
1 stop
ORD8:15 pmChicago O'Hare Intl
Feb 6
ORD5:26 pmChicago O'Hare Intl
9h 24m
1 stop
LIS8:50 amLisbon Humberto Delgado
$572
British Airways
Jan 23
LIS11:05 amLisbon Humberto Delgado
13h 29m
1 stop
ORD6:34 pmChicago O'Hare Intl
Feb 6
ORD5:26 pmChicago O'Hare Intl
9h 24m
1 stop
LIS8:50 amLisbon Humberto Delgado
$574

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 January 16, 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

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 3/6

5:35 pm-4:45 pm

1 stop29h 10m

Chicago O'Hare Intl

Thu 3/19

8:20 pm-4:55 pm

1 stop15h 35m

$455

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 3/6

5:35 pm-4:45 pm

1 stop29h 10m

Chicago O'Hare Intl

Thu 3/19

8:20 pm-4:55 pm

1 stop15h 35m

$459

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 3/6

5:35 pm-4:45 pm

1 stop29h 10m

Chicago O'Hare Intl

Sun 3/22

8:20 pm-4:45 pm

1 stop15h 25m

$469

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sun 3/1

6:00 pm-4:45 pm

1 stop28h 45m

Chicago O'Hare Intl

Sun 3/8

8:20 pm-4:30 pm

1 stop15h 10m

$477

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 2/11

6:55 am-3:00 pm

1 stop14h 05m

Chicago O'Hare Intl

Wed 2/18

7:10 pm-6:00 pm

1 stop16h 50m

$557

FaroChicago

FAO - ORD

FAOORD

Faro

Sat 1/31

11:10 am-7:15 pm

1 stop14h 05m

Chicago O'Hare Intl

Wed 2/4

9:00 pm-5:30 pm

1 stop14h 30m

$568

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 4/17

6:35 am-2:15 pm

1 stop13h 40m

Chicago O'Hare Intl

Tue 5/5

9:15 pm-5:55 pm

1 stop14h 40m

$571

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 6/4

8:20 am-4:00 pm

1 stop13h 40m

Chicago O'Hare Intl

Fri 6/19

5:00 pm-8:00 pm

2 stops21h 00m

$575

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Sun 3/1

5:00 am-5:37 pm

2 stops18h 37m

Chicago Midway

Sun 3/8

6:34 pm-5:30 pm

2 stops17h 56m

$735

LisbonChicago

LIS - MDW

LISMDW

Lisbon Humberto Delgado

Fri 2/6

5:00 am-5:55 pm

2 stops18h 55m

Chicago Midway

Sun 2/15

1:29 pm-2:35 pm

2 stops19h 06m

$741

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 $605, 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 $932. 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 1% 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

$693

Fastest flight time

9h 20m

Direct flights

Mon, Thu, Fri, Sat and Sun

Airports in Illinois

98 airports
The best one-way flight to Illinois from Portugal in the past 72 hours is $693. The best round-trip flight deal from Portugal to Illinois found on momondo in the last 72 hours is $2,254.
The fastest flight from Portugal to Illinois takes 9h 20m
Direct flights go from Portugal to Illinois on Monday, Thursday, Friday, Saturday 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?

  • 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
DeltaPriceFrom $650Free CancellationRating
7.9
8,057 reviews
Search Delta flights
KLMPriceFrom $653Free CancellationRating
7.7
1,440 reviews
Search KLM flights
TAP AIR PORTUGALPriceFrom $665Free CancellationRating
7.1
2,122 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom $669Free CancellationRating
7.2
1,435 reviews
Search Aer Lingus flights
United AirlinesPriceFrom $760Free CancellationRating
7.4
9,165 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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