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Cheap flights from Porto to Chicago from $377

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 9/8. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Porto to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
5:50 pm - 4:45 pm
OPO
-
ORD
28h 55m
1 stop
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
$587Scandinavian Airlines
Thu, Nov 12 - Mon, Nov 16
Scandinavian Airlines Logo
5:50 pm - 4:45 pm
OPO
-
ORD
28h 55m
1 stop
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
$589Scandinavian Airlines
Thu, Nov 12 - Mon, Nov 16
Scandinavian Airlines Logo
5:50 pm - 4:45 pm
OPO
-
ORD
28h 55m
1 stop
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
$591Scandinavian Airlines
Thu, Nov 12 - Mon, Nov 16
TAP AIR PORTUGAL Logo
7:00 am - 12:40 pm
OPO
-
ORD
11h 40m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 7:50 am
ORD
-
OPO
31h 50m
1 stop
$738TAP AIR PORTUGAL
Thu, Sep 17 - Wed, Sep 30
American Airlines Logo
8:20 am - 2:55 pm
OPO
-
ORD
12h 35m
1 stop
American Airlines Logo
8:00 am - 7:40 am
ORD
-
OPO
17h 40m
2 stops
$784American Airlines
Thu, Nov 12 - Mon, Nov 16
American Airlines Logo
8:20 am - 2:55 pm
OPO
-
ORD
12h 35m
1 stop
American Airlines Logo
8:00 am - 7:40 am
ORD
-
OPO
17h 40m
2 stops
$787American Airlines
Thu, Nov 12 - Mon, Nov 16
Multiple Airlines Logo
8:20 am - 10:35 pm
OPO
-
ORD
20h 15m
2 stops
Multiple Airlines Logo
5:50 pm - 7:05 pm
ORD
-
OPO
19h 15m
1 stop
$789Multiple Airlines
Thu, Sep 17 - Wed, Sep 30
American Airlines Logo
8:20 am - 2:55 pm
OPO
-
ORD
12h 35m
1 stop
American Airlines Logo
8:00 am - 7:40 am
ORD
-
OPO
17h 40m
2 stops
$790American Airlines
Thu, Nov 12 - Mon, Nov 16
Delta Logo
5:00 am - 8:30 pm
OPO
-
ORD
21h 30m
2 stops
Delta Logo
6:00 pm - 3:25 pm
ORD
-
OPO
15h 25m
2 stops
$795Delta
Thu, Sep 17 - Wed, Sep 30
American Airlines Logo
8:20 am - 7:15 pm
OPO
-
ORD
16h 55m
2 stops
American Airlines Logo
2:50 pm - 11:45 am
ORD
-
OPO
14h 55m
2 stops
$806American Airlines
Thu, Nov 12 - Mon, Nov 16

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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
Nov 12
OPO5:50 pmPorto
28h 55m
1 stop
ORD4:45 pmChicago O'Hare Intl
Nov 16
ORD7:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
$587
Scandinavian Airlines
Nov 12
OPO5:50 pmPorto
28h 55m
1 stop
ORD4:45 pmChicago O'Hare Intl
Nov 16
ORD7:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
$589
Scandinavian Airlines
Nov 12
OPO5:50 pmPorto
28h 55m
1 stop
ORD4:45 pmChicago O'Hare Intl
Nov 16
ORD7:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
$591

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

Our best American Airlines deals on Porto to Chicago O'Hare Intl Airport flight tickets
American Airlines
Nov 12
OPO8:20 amPorto
12h 35m
1 stop
ORD2:55 pmChicago O'Hare Intl
Nov 16
ORD8:00 amChicago O'Hare Intl
17h 40m
2 stops
OPO7:40 amPorto
$784
American Airlines
Nov 12
OPO8:20 amPorto
12h 35m
1 stop
ORD2:55 pmChicago O'Hare Intl
Nov 16
ORD8:00 amChicago O'Hare Intl
17h 40m
2 stops
OPO7:40 amPorto
$787
American Airlines
Nov 12
OPO8:20 amPorto
12h 35m
1 stop
ORD2:55 pmChicago O'Hare Intl
Nov 16
ORD8:00 amChicago O'Hare Intl
17h 40m
2 stops
OPO7:40 amPorto
$790

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 June 27, 2026.
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

Cheapest round-trip

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/12

5:50 pm-4:45 pm

1 stop28h 55m

Chicago O'Hare Intl

Mon 11/16

7:15 pm-11:05 am

1 stop33h 50m

$587

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/12

5:50 pm-4:45 pm

1 stop28h 55m

Chicago O'Hare Intl

Mon 11/16

7:15 pm-11:05 am

1 stop33h 50m

$589

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/12

5:50 pm-4:45 pm

1 stop28h 55m

Chicago O'Hare Intl

Mon 11/16

7:15 pm-11:05 am

1 stop33h 50m

$591

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/17

7:00 am-12:40 pm

1 stop11h 40m

Chicago O'Hare Intl

Wed 9/30

6:00 pm-7:50 am

1 stop31h 50m

$738
Quickest round-trip

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/12

8:20 am-2:55 pm

1 stop12h 35m

Chicago O'Hare Intl

Mon 11/16

8:00 am-7:40 am

2 stops17h 40m

$784

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/12

8:20 am-2:55 pm

1 stop12h 35m

Chicago O'Hare Intl

Mon 11/16

8:00 am-7:40 am

2 stops17h 40m

$787

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/17

8:20 am-10:35 pm

2 stops20h 15m

Chicago O'Hare Intl

Wed 9/30

5:50 pm-7:05 pm

1 stop19h 15m

$789

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/12

8:20 am-2:55 pm

1 stop12h 35m

Chicago O'Hare Intl

Mon 11/16

8:00 am-7:40 am

2 stops17h 40m

$790

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 9/17

5:00 am-8:30 pm

2 stops21h 30m

Chicago O'Hare Intl

Wed 9/30

6:00 pm-3:25 pm

2 stops15h 25m

$795

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 11/12

8:20 am-7:15 pm

2 stops16h 55m

Chicago O'Hare Intl

Mon 11/16

2:50 pm-11:45 am

2 stops14h 55m

$806

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

How have Porto to Chicago O'Hare Intl Airport flight prices changed over time?

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

Fastest flight time

15h 00m

Direct flights

None
The fastest flight from Porto to Chicago O'Hare Intl Airport takes 15h 00m
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.
Search flight deals

Frequently asked questions about flying from Porto to Chicago O'Hare Intl Airport

  • 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. 15h 00m 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
Schaumburg
South Haven
Rockford
Merrillville
Gurnee
Rosemont
Naperville
Orland Park
Oak Brook
New Buffalo
Joliet
Kenosha
Hammond
Aurora
Racine
Janesville
Elgin
Evanston
South Holland

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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