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Cheap flights from Porto to Chicago from $399

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 4/21. 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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Find the cheapest flights from Porto to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
11:50 am - 4:10 pm
OPO
-
ORD
34h 20m
1 stop
Scandinavian Airlines Logo
7:15 pm - 5:05 pm
ORD
-
OPO
15h 50m
1 stop
$560Scandinavian Airlines
Thu, May 14 - Thu, May 28
Scandinavian Airlines Logo
11:50 am - 4:10 pm
OPO
-
ORD
34h 20m
1 stop
Scandinavian Airlines Logo
7:15 pm - 5:05 pm
ORD
-
OPO
15h 50m
1 stop
$562Scandinavian Airlines
Thu, May 14 - Thu, May 28
TAP AIR PORTUGAL Logo
9:00 am - 4:05 pm
OPO
-
ORD
13h 05m
1 stop
TAP AIR PORTUGAL Logo
6:05 pm - 4:10 pm
ORD
-
OPO
16h 05m
1 stop
$609TAP AIR PORTUGAL
Sat, May 2 - Sat, May 9
TAP AIR PORTUGAL Logo
6:00 pm - 4:00 pm
OPO
-
ORD
28h 00m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 7:50 am
ORD
-
OPO
31h 50m
1 stop
$613TAP AIR PORTUGAL
Thu, Apr 16 - Wed, Apr 29
TAP AIR PORTUGAL Logo
10:30 pm - 4:00 pm
OPO
-
ORD
23h 30m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 5:00 pm
ORD
-
OPO
17h 00m
1 stop
$631TAP AIR PORTUGAL
Thu, Apr 16 - Wed, Apr 29
TAP AIR PORTUGAL Logo
10:30 pm - 4:00 pm
OPO
-
ORD
23h 30m
1 stop
TAP AIR PORTUGAL Logo
6:05 pm - 5:00 pm
ORD
-
OPO
16h 55m
1 stop
$656TAP AIR PORTUGAL
Tue, Mar 31 - Sat, Apr 25
Multiple Airlines Logo
9:15 am - 2:15 pm
OPO
-
ORD
35h 00m
2 stops
Multiple Airlines Logo
5:10 pm - 9:00 pm
ORD
-
OPO
21h 50m
2 stops
$738Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
12:00 pm - 2:15 pm
OPO
-
ORD
32h 15m
2 stops
Multiple Airlines Logo
5:10 pm - 9:40 pm
ORD
-
OPO
22h 30m
2 stops
$773Multiple Airlines
Thu, Apr 16 - Wed, Apr 29
Multiple Airlines Logo
7:10 pm - 4:10 pm
OPO
-
ORD
27h 00m
2 stops
Multiple Airlines Logo
7:15 pm - 7:10 pm
ORD
-
OPO
17h 55m
1 stop
$775Multiple Airlines
Thu, May 14 - Thu, May 28
Turkish Airlines Logo
4:40 pm - 9:40 am
OPO
-
ORD
23h 00m
1 stop
Turkish Airlines Logo
8:10 pm - 11:30 pm
ORD
-
OPO
21h 20m
1 stop
$793Turkish Airlines
Wed, Apr 1 - Thu, Apr 23

Scandinavian Airlines flights from Porto to Chicago

Our best Scandinavian Airlines deals on Porto to Chicago flight tickets
Scandinavian Airlines
May 14
OPO11:50 amPorto
34h 20m
1 stop
ORD4:10 pmChicago O'Hare Intl
May 28
ORD7:15 pmChicago O'Hare Intl
15h 50m
1 stop
OPO5:05 pmPorto
$560
Scandinavian Airlines
May 14
OPO11:50 amPorto
34h 20m
1 stop
ORD4:10 pmChicago O'Hare Intl
May 28
ORD7:15 pmChicago O'Hare Intl
15h 50m
1 stop
OPO5:05 pmPorto
$562

Turkish Airlines flights from Porto to Chicago

Our best Turkish Airlines deals on Porto to Chicago flight tickets
Turkish Airlines
Apr 1
OPO4:40 pmPorto
23h 00m
1 stop
ORD9:40 amChicago O'Hare Intl
Apr 23
ORD8:10 pmChicago O'Hare Intl
21h 20m
1 stop
OPO11:30 pmPorto
$793
Turkish Airlines
Apr 22
OPO4:40 pmPorto
23h 00m
1 stop
ORD9:40 amChicago O'Hare Intl
Apr 30
ORD11:25 amChicago O'Hare Intl
30h 05m
1 stop
OPO11:30 pmPorto
$797
Turkish Airlines
Apr 1
OPO4:40 pmPorto
23h 00m
1 stop
ORD9:40 amChicago O'Hare Intl
Apr 23
ORD11:25 amChicago O'Hare Intl
22h 20m
1 stop
OPO3:45 pmPorto
$803

momondo Fare Finder

 
Customize your flight search to find flights from Porto to Chicago 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 March 20, 2026.
Use the filters below to find and compare flights from Porto to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 5/14

11:50 am-4:10 pm

1 stop34h 20m

Chicago O'Hare Intl

Thu 5/28

7:15 pm-5:05 pm

1 stop15h 50m

$560

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 5/14

11:50 am-4:10 pm

1 stop34h 20m

Chicago O'Hare Intl

Thu 5/28

7:15 pm-5:05 pm

1 stop15h 50m

$562
Quickest round-trip

PortoChicago

OPO - ORD

OPOORD

Porto

Sat 5/2

9:00 am-4:05 pm

1 stop13h 05m

Chicago O'Hare Intl

Sat 5/9

6:05 pm-4:10 pm

1 stop16h 05m

$609

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/16

6:00 pm-4:00 pm

1 stop28h 00m

Chicago O'Hare Intl

Wed 4/29

6:00 pm-7:50 am

1 stop31h 50m

$613

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/16

10:30 pm-4:00 pm

1 stop23h 30m

Chicago O'Hare Intl

Wed 4/29

6:00 pm-5:00 pm

1 stop17h 00m

$631

PortoChicago

OPO - ORD

OPOORD

Porto

Tue 3/31

10:30 pm-4:00 pm

1 stop23h 30m

Chicago O'Hare Intl

Sat 4/25

6:05 pm-5:00 pm

1 stop16h 55m

$656

PortoChicago

OPO - ORD

OPOORD

Porto

Mon 5/4

9:15 am-2:15 pm

2 stops35h 00m

Chicago O'Hare Intl

Mon 5/11

5:10 pm-9:00 pm

2 stops21h 50m

$738

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 4/16

12:00 pm-2:15 pm

2 stops32h 15m

Chicago O'Hare Intl

Wed 4/29

5:10 pm-9:40 pm

2 stops22h 30m

$773

PortoChicago

OPO - ORD

OPOORD

Porto

Thu 5/14

7:10 pm-4:10 pm

2 stops27h 00m

Chicago O'Hare Intl

Thu 5/28

7:15 pm-7:10 pm

1 stop17h 55m

$775

PortoChicago

OPO - ORD

OPOORD

Porto

Wed 4/1

4:40 pm-9:40 am

1 stop23h 00m

Chicago O'Hare Intl

Thu 4/23

8:10 pm-11:30 pm

1 stop21h 20m

$793

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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When to book flights from Porto to Chicago

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

Cheap Porto to Chicago (OPO to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Porto to Chicago

Fastest flight time

15h 40m

Direct flights

None
The fastest flight from Porto to Chicago takes 15h 40m
There are no direct flights from Porto to Chicago. There are no popular flight routes from Porto to Chicago.
Search flight deals

  • How far is Porto to Chicago by plane?

    Porto and Chicago are 3927.7 mi apart from one another. By plane, this route typically takes 15h 40m.

  • When did momondo last update prices for flights from Porto Airport to Chicago?

    Prices for flights from Porto Airport to Chicago were last updated today.

  • How old do you have to be to fly from Porto Airport to Chicago?

    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.

  • What documentation or ID do you need to fly to Chicago?

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

  • What is the most popular airline from Porto to Chicago?

  • How do I get Price Alerts for flights from Porto to Chicago?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Porto from Chicago. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Porto to Chicago with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Saint Joseph
Portage
Lansing
Valparaiso
Schererville
Munster
Crown Point
Chesterton
Monticello
Porter
Griffith
Saint John

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?

All flight searches from Porto to Chicago on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Porto 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 Porto to Chicago right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Porto to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport