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Cheap flights from Portugal to Chicago from $329

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 Chicago departing on 9/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portugal to Chicago

Recent round-trip flight deals from Portugal to Chicago

Scandinavian Airlines Logo
4:55 pm - 4:45 pmLIS-ORD
29h 50m1 stop
Scandinavian Airlines Logo
7:20 pm - 2:55 pmORD-LIS
13h 35m1 stop
$388Scandinavian Airlines
Find Deal
Wed, Nov 19 - Thu, Nov 27
Scandinavian Airlines Logo
4:55 pm - 4:45 pmLIS-ORD
29h 50m1 stop
Scandinavian Airlines Logo
7:20 pm - 4:05 pmORD-LIS
14h 45m1 stop
$389Scandinavian Airlines
Find Deal
Fri, Jan 16 - Sat, Feb 21
Logo
4:55 pm - 4:45 pmLIS-ORD
29h 50m1 stop
Logo
7:20 pm - 9:35 pmORD-LIS
20h 15m1 stop
$449
Find Deal
Wed, Nov 19 - Wed, Nov 26
Logo
6:55 pm - 4:45 pmLIS-ORD
27h 50m1 stop
Logo
7:20 pm - 4:05 pmORD-LIS
14h 45m1 stop
$454
Find Deal
Sat, Nov 22 - Sat, Nov 29
TAP AIR PORTUGAL Logo
6:10 pm - 4:30 pmFAO-ORD
28h 20m1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 5:20 pmORD-FAO
17h 20m1 stop
$545TAP AIR PORTUGAL
Find Deal
Thu, Sep 18 - Sun, Sep 21
TAP AIR PORTUGAL Logo
10:25 pm - 4:10 pmOPO-ORD
23h 45m1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 10:55 amORD-OPO
10h 55m1 stop
$551TAP AIR PORTUGAL
Find Deal
Thu, Sep 11 - Thu, Sep 25
Aer Lingus Logo
10:15 pm - 2:00 pmLIS-ORD
21h 45m1 stop
Aer Lingus Logo
3:45 pm - 10:15 amORD-LIS
12h 30m1 stop
$581Aer Lingus
Find Deal
Wed, Sep 17 - Sat, Sep 27
Aer Lingus Logo
10:15 pm - 2:00 pmLIS-ORD
21h 45m1 stop
Aer Lingus Logo
9:15 pm - 9:35 pmORD-LIS
18h 20m1 stop
$590Aer Lingus
Find Deal
Tue, Oct 14 - Mon, Oct 20
United Airlines Logo
6:00 am - 7:48 pmOPO-ORD
19h 48m2 stops
United Airlines Logo
1:00 pm - 9:30 amORD-OPO
14h 30m2 stops
$745United Airlines
Find Deal
Fri, Sep 5 - Wed, Nov 5
United Airlines Logo
12:30 pm - 8:05 pmOPO-ORD
13h 35m1 stop
United Airlines Logo
4:20 pm - 11:40 amORD-OPO
13h 20m1 stop
$746United Airlines
Find Deal
Mon, Nov 24 - Mon, Dec 1

SWISS flights from Portugal to Chicago O'Hare Intl Airport

Our best SWISS deals on Portugal to Chicago O'Hare Intl Airport flight tickets
SWISS
Sep 5
OPO8:40 amPorto
13h 15m
1 stop
ORD3:55 pmChicago O'Hare Intl
Nov 7
ORD6:50 pmChicago O'Hare Intl
34h 25m
1 stop
OPO11:15 amPorto
$735
Find similar
SWISS
Oct 3
OPO8:40 amPorto
13h 15m
1 stop
ORD3:55 pmChicago O'Hare Intl
Oct 10
ORD7:05 pmChicago O'Hare Intl
30h 50m
1 stop
OPO7:55 amPorto
$756
Find similar
SWISS
Oct 25
OPO7:20 pmPorto
28h 00m
1 stop
ORD5:20 pmChicago O'Hare Intl
Nov 1
ORD7:50 pmChicago O'Hare Intl
34h 20m
1 stop
OPO11:10 amPorto
$763
Find similar

United Airlines flights from Portugal to Chicago O'Hare Intl Airport

Our best United Airlines deals on Portugal to Chicago O'Hare Intl Airport flight tickets
United Airlines
Sep 5
OPO6:00 amPorto
19h 48m
2 stops
ORD7:48 pmChicago O'Hare Intl
Nov 5
ORD1:00 pmChicago O'Hare Intl
14h 30m
2 stops
OPO9:30 amPorto
$745
Find similar
United Airlines
Nov 24
OPO12:30 pmPorto
13h 35m
1 stop
ORD8:05 pmChicago O'Hare Intl
Dec 1
ORD4:20 pmChicago O'Hare Intl
13h 20m
1 stop
OPO11:40 amPorto
$746
Find similar
United Airlines
Sep 5
OPO6:00 amPorto
19h 55m
1 stop
ORD7:55 pmChicago O'Hare Intl
Nov 9
ORD4:20 pmChicago O'Hare Intl
11h 10m
1 stop
OPO9:30 amPorto
$757
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portugal to Chicago O'Hare Intl Airport 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 August 21, 2025.
Use the filters below to find and compare flights from Portugal to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 11/19

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Thu 11/27

7:20 pm-2:55 pm

1 stop13h 35m

$388

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Fri 1/16

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Sat 2/21

7:20 pm-4:05 pm

1 stop14h 45m

$389

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 11/19

4:55 pm-4:45 pm

1 stop29h 50m

Chicago O'Hare Intl

Wed 11/26

7:20 pm-9:35 pm

1 stop20h 15m

$449

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Sat 11/22

6:55 pm-4:45 pm

1 stop27h 50m

Chicago O'Hare Intl

Sat 11/29

7:20 pm-4:05 pm

1 stop14h 45m

$454

FaroChicago

FAO - ORD

FAOORD

Faro

Thu 9/18

6:10 pm-4:30 pm

1 stop28h 20m

Chicago O'Hare Intl

Sun 9/21

6:00 pm-5:20 pm

1 stop17h 20m

$545

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/11

10:25 pm-4:10 pm

1 stop23h 45m

Chicago O'Hare Intl

Thu 9/25

6:00 pm-10:55 am

1 stop10h 55m

$551

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Wed 9/17

10:15 pm-2:00 pm

1 stop21h 45m

Chicago O'Hare Intl

Sat 9/27

3:45 pm-10:15 am

1 stop12h 30m

$581

LisbonChicago

LIS - ORD

LISORD

Lisbon Humberto Delgado

Tue 10/14

10:15 pm-2:00 pm

1 stop21h 45m

Chicago O'Hare Intl

Mon 10/20

9:15 pm-9:35 pm

1 stop18h 20m

$590

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 9/5

6:00 am-7:48 pm

2 stops19h 48m

Chicago O'Hare Intl

Wed 11/5

1:00 pm-9:30 am

2 stops14h 30m

$745

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

12:30 pm-8:05 pm

1 stop13h 35m

Chicago O'Hare Intl

Mon 12/1

4:20 pm-11:40 am

1 stop13h 20m

$746

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 Chicago from

How to get the cheapest flight ticket from Portugal to Chicago O'Hare Intl Airport

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 Chicago O'Hare Intl Airport?

The month of April is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Portugal averaging around $746.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Sunday when prices can be found for as low as $784. This is often the case because there is less demand to fly during this day of the week. On the other hand, Wednesday is the most expensive day to depart from Portugal because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,361.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from Portugal at noon is the least expensive time of day to depart. momondo users have found prices as low as $932 when looking at flights departing at noon. Try not to purchase tickets in the morning because they tend to be around $1,211. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Portugal to Chicago O'Hare Intl flight route?

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

What cabin class options are available on Portugal to Chicago O'Hare Intl flights?

There are 3 cabin classes available to choose from on Portugal to Chicago O'Hare Intl 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 Chicago O'Hare Intl Airport flights?

You could potentially save up to 1% on your flight if you consider stops on a Portugal to Chicago O'Hare Intl Airport flight.

Cheap Portugal to Chicago O'Hare Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to Chicago O'Hare Intl Airport

Best Price Found

$591

Fastest flight time

9h 10m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun
The best one-way flight to Chicago O'Hare Intl Airport from Portugal in the past 72 hours is $591. The best round-trip flight deal from Portugal to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $933.
The fastest flight from Portugal to Chicago O'Hare Intl Airport takes 9h 10m
Direct flights go from Portugal to Chicago O'Hare Intl Airport on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is TAP AIR PORTUGAL.
Search flight deals

  • When did momondo last update prices for flights from Portugal to Chicago O'Hare Intl Airport?

    Prices for flights from Portugal to Chicago O'Hare Intl Airport are updated daily.

  • How many operators does momondo search for flights from Portugal to Chicago O'Hare Intl Airport?

  • How old do you have to be to fly from Portugal to Chicago O'Hare Intl Airport?

    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 Chicago O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Portugal to Chicago O'Hare Intl Airport?

Best airlines flying from Portugal to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Portugal to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Aer LingusPriceFrom $579Free CancellationRating
7.1
1,228 reviews
Search Aer Lingus flights
TAP AIR PORTUGALPriceFrom $580Free CancellationRating
7.1
1,959 reviews
Search TAP AIR PORTUGAL flights
DeltaPriceFrom $650Free CancellationRating
7.9
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $733Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lake Geneva
Rockford
South Haven
Schaumburg
Merrillville
Gurnee
Naperville
Rosemont
Kenosha
New Buffalo
Joliet
Oak Brook
Racine
Hammond
Tinley Park
Orland Park
Elgin
Aurora
Janesville
Benton Harbor

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portugal to Chicago for you.

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

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

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

momondo helps you find the best flight between Portugal and Chicago by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from Portugal and alert you when they change.

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