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Cheap flights from Porto to Chicago from $401

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 5/21. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
7:25 pm - 12:45 pm
OPO
-
ORD
23h 20m
1 stop
SWISS Logo
7:50 pm - 6:30 pm
ORD
-
OPO
17h 40m
1 stop
$484SWISS
Thu, Mar 5 - Tue, Mar 10
TAP AIR PORTUGAL Logo
10:25 pm - 4:00 pm
OPO
-
ORD
23h 35m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 3:30 pm
ORD
-
OPO
15h 30m
1 stop
$575TAP AIR PORTUGAL
Thu, Apr 23 - Sun, Apr 26
Multiple Airlines Logo
6:35 pm - 12:40 am
OPO
-
ORD
12h 05m
1 stop
Multiple Airlines Logo
6:51 pm - 3:00 pm
ORD
-
OPO
15h 09m
2 stops
$657Multiple Airlines
Thu, Mar 5 - Tue, Mar 10
Scandinavian Airlines Logo
11:50 am - 1:27 pm
OPO
-
ORD
55h 37m
2 stops
Scandinavian Airlines Logo
7:15 pm - 11:00 am
ORD
-
OPO
33h 45m
1 stop
$705Scandinavian Airlines
Mon, Mar 30 - Mon, Apr 6
Multiple Airlines Logo
8:40 pm - 4:00 pm
OPO
-
ORD
25h 20m
2 stops
Multiple Airlines Logo
7:25 pm - 8:40 pm
ORD
-
OPO
19h 15m
2 stops
$708Multiple Airlines
Thu, Apr 23 - Sun, Apr 26
Scandinavian Airlines Logo
11:50 am - 10:16 pm
OPO
-
ORD
40h 26m
2 stops
Scandinavian Airlines Logo
7:35 pm - 11:00 am
ORD
-
OPO
33h 25m
2 stops
$726Scandinavian Airlines
Mon, Mar 30 - Mon, Apr 6
Multiple Airlines Logo
8:40 pm - 4:00 pm
OPO
-
ORD
25h 20m
2 stops
Multiple Airlines Logo
7:25 pm - 8:00 am
ORD
-
OPO
30h 35m
3 stops
$729Multiple Airlines
Thu, Apr 23 - Sun, Apr 26
TAP AIR PORTUGAL Logo
4:55 pm - 2:45 pm
OPO
-
ORD
27h 50m
1 stop
TAP AIR PORTUGAL Logo
8:15 pm - 9:50 am
ORD
-
OPO
31h 35m
1 stop
$735TAP AIR PORTUGAL
Sat, Feb 14 - Fri, Feb 20
Scandinavian Airlines Logo
10:25 am - 5:45 pm
OPO
-
ORD
36h 20m
1 stop
Scandinavian Airlines Logo
7:15 pm - 5:05 pm
ORD
-
OPO
15h 50m
1 stop
$744Scandinavian Airlines
Wed, Mar 18 - Thu, Jun 4
Multiple Airlines Logo
7:00 am - 2:15 pm
OPO
-
ORD
13h 15m
1 stop
Multiple Airlines Logo
7:25 pm - 8:40 pm
ORD
-
OPO
19h 15m
2 stops
$746Multiple Airlines
Thu, Apr 23 - Sun, Apr 26

Lufthansa flights from Porto to Chicago O'Hare Intl Airport

Our best Lufthansa deals on Porto to Chicago O'Hare Intl Airport flight tickets
Lufthansa
Mar 7
OPO6:00 amPorto
13h 25m
1 stop
ORD1:25 pmChicago O'Hare Intl
Mar 23
ORD7:00 pmChicago O'Hare Intl
12h 50m
1 stop
OPO12:50 pmPorto
$804
Lufthansa
Mar 16
OPO6:00 amPorto
20h 05m
1 stop
ORD9:05 pmChicago O'Hare Intl
Mar 22
ORD7:30 pmChicago O'Hare Intl
21h 55m
1 stop
OPO10:25 pmPorto
$817
Lufthansa
Feb 13
OPO6:00 amPorto
13h 25m
1 stop
ORD1:25 pmChicago O'Hare Intl
Feb 20
ORD3:20 pmChicago O'Hare Intl
17h 25m
1 stop
OPO2:45 pmPorto
$823

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
Mar 30
OPO11:50 amPorto
55h 37m
2 stops
ORD1:27 pmChicago O'Hare Intl
Apr 6
ORD7:15 pmChicago O'Hare Intl
33h 45m
1 stop
OPO11:00 amPorto
$705
Scandinavian Airlines
Mar 30
OPO11:50 amPorto
40h 26m
2 stops
ORD10:16 pmChicago O'Hare Intl
Apr 6
ORD7:35 pmChicago O'Hare Intl
33h 25m
2 stops
OPO11:00 amPorto
$726
Scandinavian Airlines
Mar 18
OPO10:25 amPorto
36h 20m
1 stop
ORD5:45 pmChicago O'Hare Intl
May 30
ORD7:15 pmChicago O'Hare Intl
15h 50m
1 stop
OPO5:05 pmPorto
$744

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 February 4, 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

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 3/5

7:25 pm-12:45 pm

1 stop23h 20m

Chicago O'Hare Intl

Tue 3/10

7:50 pm-6:30 pm

1 stop17h 40m

$484

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/23

10:25 pm-4:00 pm

1 stop23h 35m

Chicago O'Hare Intl

Sun 4/26

6:00 pm-3:30 pm

1 stop15h 30m

$575

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 3/5

6:35 pm-12:40 am

1 stop12h 05m

Chicago O'Hare Intl

Tue 3/10

6:51 pm-3:00 pm

2 stops15h 09m

$657

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 3/30

11:50 am-1:27 pm

2 stops55h 37m

Chicago O'Hare Intl

Mon 4/6

7:15 pm-11:00 am

1 stop33h 45m

$705

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/23

8:40 pm-4:00 pm

2 stops25h 20m

Chicago O'Hare Intl

Sun 4/26

7:25 pm-8:40 pm

2 stops19h 15m

$708

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 3/30

11:50 am-10:16 pm

2 stops40h 26m

Chicago O'Hare Intl

Mon 4/6

7:35 pm-11:00 am

2 stops33h 25m

$726

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/23

8:40 pm-4:00 pm

2 stops25h 20m

Chicago O'Hare Intl

Sun 4/26

7:25 pm-8:00 am

3 stops30h 35m

$729

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 2/14

4:55 pm-2:45 pm

1 stop27h 50m

Chicago O'Hare Intl

Fri 2/20

8:15 pm-9:50 am

1 stop31h 35m

$735

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 3/18

10:25 am-5:45 pm

1 stop36h 20m

Chicago O'Hare Intl

Thu 6/4

7:15 pm-5:05 pm

1 stop15h 50m

$744

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/23

7:00 am-2:15 pm

1 stop13h 15m

Chicago O'Hare Intl

Sun 4/26

7:25 pm-8:40 pm

2 stops19h 15m

$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 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

13h 25m

Direct flights

None
The fastest flight from Porto to Chicago O'Hare Intl Airport takes 13h 25m
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

  • 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. 13h 25m 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
Naperville
Rosemont
New Buffalo
Kenosha
Joliet
Oak Brook
Orland Park
Racine
Hammond
Janesville
Tinley Park
Elgin
Aurora
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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