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Cheap flights from Porto to Chicago from $311

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Porto to Chicago departing on 10/15. 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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Cheap round-trip flights

Scandinavian Airlines Logo
5:55 pm - 4:10 pmOPO-ORD
28h 15m1 stop
Scandinavian Airlines Logo
8:50 pm - 4:55 pmORD-OPO
15h 05m1 stop
$487Scandinavian Airlines
Find Deal
Fri, Oct 17 - Thu, Oct 30
Scandinavian Airlines Logo
5:55 pm - 4:10 pmOPO-ORD
28h 15m1 stop
Scandinavian Airlines Logo
8:50 pm - 4:55 pmORD-OPO
15h 05m1 stop
$497Scandinavian Airlines
Find Deal
Fri, Oct 17 - Thu, Oct 30
Logo
10:15 pm - 12:35 pmOPO-ORD
20h 20m2 stops
Logo
6:00 am - 11:25 amORD-OPO
23h 25m3 stops
$664
Find Deal
Wed, Oct 8 - Wed, Oct 15
Logo
7:20 am - 4:30 pmOPO-ORD
15h 10m2 stops
Logo
6:00 pm - 9:00 pmORD-OPO
21h 00m2 stops
$670
Find Deal
Fri, Sep 19 - Fri, Oct 3
SWISS Logo
8:40 am - 3:55 pmOPO-ORD
13h 15m1 stop
SWISS Logo
7:50 pm - 7:50 amORD-OPO
31h 00m1 stop
$744SWISS
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Fri, Oct 17 - Thu, Oct 30
United Airlines Logo
6:00 am - 1:10 pmOPO-ORD
13h 10m1 stop
United Airlines Logo
6:25 pm - 2:55 pmORD-OPO
14h 30m1 stop
$748United Airlines
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Mon, Nov 24 - Mon, Dec 1
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
$752United Airlines
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Mon, Nov 24 - Mon, Dec 1
Air Canada Logo
6:00 am - 7:30 pmOPO-ORD
19h 30m2 stops
Air Canada Logo
12:50 pm - 12:50 pmORD-OPO
18h 00m2 stops
$753Air Canada
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Mon, Nov 24 - Mon, Dec 1
SWISS Logo
8:40 am - 3:55 pmOPO-ORD
13h 15m1 stop
SWISS Logo
6:50 pm - 5:40 pmORD-OPO
17h 50m2 stops
$772SWISS
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Fri, Oct 17 - Thu, Oct 30
Air Canada Logo
6:15 am - 10:07 pmOPO-ORD
21h 52m2 stops
Air Canada Logo
4:50 pm - 5:40 pmORD-OPO
19h 50m2 stops
$830Air Canada
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Fri, Oct 17 - Thu, Oct 30

Scandinavian Airlines flights from Porto to Chicago O'Hare Intl Airport

Our best Scandinavian Airlines deals on Porto to Chicago O'Hare Intl Airport flight tickets
Scandinavian Airlines
Oct 17
OPO5:55 pmPorto
28h 15m
1 stop
ORD4:10 pmChicago O'Hare Intl
Oct 30
ORD8:50 pmChicago O'Hare Intl
15h 05m
1 stop
OPO4:55 pmPorto
$487
Find similar
Scandinavian Airlines
Oct 17
OPO5:55 pmPorto
28h 15m
1 stop
ORD4:10 pmChicago O'Hare Intl
Oct 30
ORD8:50 pmChicago O'Hare Intl
15h 05m
1 stop
OPO4:55 pmPorto
$497
Find similar
Scandinavian Airlines
Oct 17
OPO5:55 pmPorto
28h 15m
1 stop
ORD4:10 pmChicago O'Hare Intl
Oct 30
ORD8:50 pmChicago O'Hare Intl
15h 05m
1 stop
OPO4:55 pmPorto
$507
Find similar

SWISS flights from Porto to Chicago O'Hare Intl Airport

Our best SWISS deals on Porto to Chicago O'Hare Intl Airport flight tickets
SWISS
Oct 17
OPO8:40 amPorto
13h 15m
1 stop
ORD3:55 pmChicago O'Hare Intl
Oct 30
ORD7:50 pmChicago O'Hare Intl
31h 00m
1 stop
OPO7:50 amPorto
$744
Find similar
SWISS
Oct 17
OPO8:40 amPorto
13h 15m
1 stop
ORD3:55 pmChicago O'Hare Intl
Oct 30
ORD6:50 pmChicago O'Hare Intl
17h 50m
2 stops
OPO5:40 pmPorto
$772
Find similar
SWISS
Sep 19
OPO8:40 amPorto
13h 15m
1 stop
ORD3:55 pmChicago O'Hare Intl
Oct 3
ORD7:05 pmChicago O'Hare Intl
17h 25m
1 stop
OPO6:30 pmPorto
$773
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momondo Fare Finder

 
Customize your flight search to find flights from Porto 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 25, 2025.
Use the filters below to find and compare flights from Porto to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/17

5:55 pm-4:10 pm

1 stop28h 15m

Chicago O'Hare Intl

Thu 10/30

8:50 pm-4:55 pm

1 stop15h 05m

$487

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/17

5:55 pm-4:10 pm

1 stop28h 15m

Chicago O'Hare Intl

Thu 10/30

8:50 pm-4:55 pm

1 stop15h 05m

$497

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 10/8

10:15 pm-12:35 pm

2 stops20h 20m

Chicago O'Hare Intl

Wed 10/15

6:00 am-11:25 am

3 stops23h 25m

$664

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 9/19

7:20 am-4:30 pm

2 stops15h 10m

Chicago O'Hare Intl

Fri 10/3

6:00 pm-9:00 pm

2 stops21h 00m

$670

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/17

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Thu 10/30

7:50 pm-7:50 am

1 stop31h 00m

$744

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

6:00 am-1:10 pm

1 stop13h 10m

Chicago O'Hare Intl

Mon 12/1

6:25 pm-2:55 pm

1 stop14h 30m

$748

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

$752

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 11/24

6:00 am-7:30 pm

2 stops19h 30m

Chicago O'Hare Intl

Mon 12/1

12:50 pm-12:50 pm

2 stops18h 00m

$753

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/17

8:40 am-3:55 pm

1 stop13h 15m

Chicago O'Hare Intl

Thu 10/30

6:50 pm-5:40 pm

2 stops17h 50m

$772

PortoChicago

OPO - ORD

OPOORD

Porto

Fri 10/17

6:15 am-10:07 pm

2 stops21h 52m

Chicago O'Hare Intl

Thu 10/30

4:50 pm-5:40 pm

2 stops19h 50m

$830

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 Porto 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 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 Saturday when prices can be found for as low as $758. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from Porto because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $879.

When to book flights from Porto to Chicago O'Hare Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Porto to Chicago O'Hare Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Porto to Chicago O'Hare Intl Airport (OPO to ORD) flight deals and tips

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

Direct flights

None
There are no direct flights from Porto to Chicago O'Hare Intl Airport. There are no popular flight routes from Porto to Chicago O'Hare Intl Airport.
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  • How far is Porto to Chicago O'Hare Intl by plane?

    Porto and Chicago O'Hare Intl are 3936.9 mi apart from one another. 12h 55m is a normal flight duration for this route.

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

    Prices for flights from Porto Airport to Chicago O'Hare Intl Airport are refreshed on a daily basis.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Porto Airport to Chicago O'Hare Intl Airport.

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

    The necessary travel and health documents for your Chicago O'Hare Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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 Porto to Chicago?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Chicago from Porto.

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

Yes. momondo enables you to select and highlight flights to Chicago from Porto with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Porto to Chicago.

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

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

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