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Cheap flights from Porto to Chicago from $454

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 9/14. 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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Find the cheapest flights from Porto to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
11:55 am - 2:50 pm
OPO
-
ORD
32h 55m
1 stop
United Airlines Logo
7:10 am - 6:55 am
ORD
-
OPO
17h 45m
1 stop
$540United Airlines
Sat, Jun 6 - Mon, Jun 8
United Airlines Logo
11:55 am - 10:19 am
OPO
-
ORD
28h 24m
1 stop
United Airlines Logo
4:05 pm - 3:40 pm
ORD
-
OPO
17h 35m
1 stop
$545United Airlines
Sat, Jun 20 - Sun, Jun 21
United Airlines Logo
11:55 am - 10:19 am
OPO
-
ORD
28h 24m
1 stop
United Airlines Logo
4:05 pm - 3:40 pm
ORD
-
OPO
17h 35m
1 stop
$546United Airlines
Sat, Jun 20 - Sun, Jun 21
United Airlines Logo
11:55 am - 2:44 pm
OPO
-
ORD
32h 49m
1 stop
United Airlines Logo
10:30 pm - 3:40 pm
ORD
-
OPO
35h 10m
1 stop
$571United Airlines
Sat, Jun 20 - Sun, Jun 21
United Airlines Logo
9:00 am - 7:42 am
OPO
-
ORD
28h 42m
1 stop
United Airlines Logo
9:48 pm - 7:00 am
ORD
-
OPO
27h 12m
2 stops
$688United Airlines
Sat, Jun 20 - Sun, Jun 21
United Airlines Logo
11:55 am - 7:42 am
OPO
-
ORD
25h 47m
2 stops
United Airlines Logo
11:05 am - 6:50 am
ORD
-
OPO
13h 45m
1 stop
$748United Airlines
Sat, Jun 20 - Sun, Jun 21
Air Canada Logo
11:55 am - 7:42 am
OPO
-
ORD
25h 47m
2 stops
Air Canada Logo
2:02 pm - 6:50 am
ORD
-
OPO
10h 48m
1 stop
$777Air Canada
Sat, Jun 20 - Sun, Jun 21
Air Canada Logo
11:55 am - 7:42 am
OPO
-
ORD
25h 47m
2 stops
Air Canada Logo
6:22 pm - 7:00 am
ORD
-
OPO
30h 38m
2 stops
$778Air Canada
Sat, Jun 20 - Sun, Jun 21
TAP AIR PORTUGAL Logo
9:15 pm - 12:40 pm
OPO
-
ORD
21h 25m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 5:00 pm
ORD
-
OPO
17h 00m
1 stop
$787TAP AIR PORTUGAL
Wed, Oct 7 - Sun, Oct 11
Air Canada Logo
12:45 pm - 8:12 pm
OPO
-
ORD
13h 27m
1 stop
Air Canada Logo
11:05 am - 7:00 am
ORD
-
OPO
13h 55m
1 stop
$800Air Canada
Wed, Oct 7 - Tue, Oct 13

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
May 28
OPO10:30 amPorto
35h 40m
1 stop
ORD4:10 pmChicago O'Hare Intl
Jun 16
ORD7:15 pmChicago O'Hare Intl
32h 30m
1 stop
OPO9:45 amPorto
$829
Scandinavian Airlines
May 21
OPO10:30 amPorto
35h 40m
1 stop
ORD4:10 pmChicago O'Hare Intl
Jun 16
ORD7:15 pmChicago O'Hare Intl
32h 30m
1 stop
OPO9:45 amPorto
$925
Scandinavian Airlines
May 21
OPO10:30 amPorto
35h 40m
1 stop
ORD4:10 pmChicago O'Hare Intl
Jun 16
ORD7:15 pmChicago O'Hare Intl
32h 30m
1 stop
OPO9:45 amPorto
$926

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
May 28
OPO12:10 pmPorto
13h 45m
1 stop
ORD7:55 pmChicago O'Hare Intl
Jun 15
ORD9:40 pmChicago O'Hare Intl
19h 45m
1 stop
OPO11:25 pmPorto
$908
Lufthansa
May 29
OPO6:00 amPorto
14h 55m
1 stop
ORD2:55 pmChicago O'Hare Intl
Jun 15
ORD6:00 pmChicago O'Hare Intl
23h 25m
1 stop
OPO11:25 pmPorto
$920
Lufthansa
May 27
OPO6:00 amPorto
12h 55m
1 stop
ORD12:55 pmChicago O'Hare Intl
Jun 16
ORD3:10 pmChicago O'Hare Intl
14h 00m
1 stop
OPO11:10 amPorto
$1,233

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 May 13, 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

Sat 6/6

11:55 am-2:50 pm

1 stop32h 55m

Chicago O'Hare Intl

Mon 6/8

7:10 am-6:55 am

1 stop17h 45m

$540

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 6/20

11:55 am-10:19 am

1 stop28h 24m

Chicago O'Hare Intl

Sun 6/21

4:05 pm-3:40 pm

1 stop17h 35m

$545

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 6/20

11:55 am-10:19 am

1 stop28h 24m

Chicago O'Hare Intl

Sun 6/21

4:05 pm-3:40 pm

1 stop17h 35m

$546

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 6/20

11:55 am-2:44 pm

1 stop32h 49m

Chicago O'Hare Intl

Sun 6/21

10:30 pm-3:40 pm

1 stop35h 10m

$571

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 6/20

9:00 am-7:42 am

1 stop28h 42m

Chicago O'Hare Intl

Sun 6/21

9:48 pm-7:00 am

2 stops27h 12m

$688

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 6/20

11:55 am-7:42 am

2 stops25h 47m

Chicago O'Hare Intl

Sun 6/21

11:05 am-6:50 am

1 stop13h 45m

$748

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 6/20

11:55 am-7:42 am

2 stops25h 47m

Chicago O'Hare Intl

Sun 6/21

2:02 pm-6:50 am

1 stop10h 48m

$777

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 6/20

11:55 am-7:42 am

2 stops25h 47m

Chicago O'Hare Intl

Sun 6/21

6:22 pm-7:00 am

2 stops30h 38m

$778

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 10/7

9:15 pm-12:40 pm

1 stop21h 25m

Chicago O'Hare Intl

Sun 10/11

6:00 pm-5:00 pm

1 stop17h 00m

$787
Quickest round-trip

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 10/7

12:45 pm-8:12 pm

1 stop13h 27m

Chicago O'Hare Intl

Tue 10/13

11:05 am-7:00 am

1 stop13h 55m

$800

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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

16h 55m

Direct flights

None
The fastest flight from Porto to Chicago O'Hare Intl Airport takes 16h 55m
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. 16h 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
South Haven
Schaumburg
Rockford
Merrillville
Gurnee
Rosemont
Naperville
Orland Park
New Buffalo
Oak Brook
Kenosha
Joliet
Aurora
Racine
Janesville
Hammond
Evanston
Elgin
Tinley Park

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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