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Cheap flights from Chicago to Porto from $296

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Porto departing on 8/31. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
7:00 am - 12:40 pm
OPO
-
ORD
11h 40m
1 stop
$619TAP AIR PORTUGAL
Sun, Sep 20 - Thu, Oct 1
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
5:05 am - 4:00 pm
OPO
-
ORD
16h 55m
1 stop
$621TAP AIR PORTUGAL
Wed, Sep 23 - Wed, Oct 7
TAP AIR PORTUGAL Logo
6:00 pm - 5:00 pm
ORD
-
OPO
17h 00m
1 stop
TAP AIR PORTUGAL Logo
9:00 am - 12:40 pm
OPO
-
ORD
33h 40m
1 stop
$626TAP AIR PORTUGAL
Wed, Aug 12 - Wed, Aug 19
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
7:00 am - 12:40 pm
OPO
-
ORD
11h 40m
1 stop
$627TAP AIR PORTUGAL
Sun, Sep 20 - Thu, Oct 1
KLM Logo
1:05 pm - 10:30 am
MDW
-
OPO
15h 25m
2 stops
KLM Logo
5:00 am - 4:25 pm
OPO
-
MDW
17h 25m
2 stops
$779KLM
Sun, Jan 17 - Fri, Jan 22
Delta Logo
1:00 pm - 10:35 am
MDW
-
OPO
15h 35m
2 stops
Delta Logo
5:00 am - 10:10 pm
OPO
-
MDW
23h 10m
2 stops
$824Delta
Sat, Jan 16 - Fri, Jan 22
Delta Logo
1:00 pm - 10:35 am
MDW
-
OPO
15h 35m
2 stops
Delta Logo
5:00 am - 4:25 pm
OPO
-
MDW
17h 25m
2 stops
$825Delta
Sun, Jan 17 - Sat, Jan 23
Multiple Airlines Logo
1:05 pm - 9:05 am
MDW
-
OPO
14h 00m
2 stops
Multiple Airlines Logo
5:55 am - 4:50 pm
OPO
-
MDW
16h 55m
2 stops
$832Multiple Airlines
Sun, Nov 15 - Sun, Nov 22
Multiple Airlines Logo
1:05 pm - 10:30 am
MDW
-
OPO
15h 25m
2 stops
Multiple Airlines Logo
5:55 am - 4:50 pm
OPO
-
MDW
16h 55m
2 stops
$836Multiple Airlines
Sun, Jan 17 - Sun, Jan 24
KLM Logo
1:00 pm - 10:30 am
MDW
-
OPO
15h 30m
2 stops
KLM Logo
5:00 am - 4:25 pm
OPO
-
MDW
17h 25m
2 stops
$879KLM
Sat, Jan 16 - Sat, Jan 23

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TAP AIR PORTUGAL flights from Chicago to Porto

Our best TAP AIR PORTUGAL deals on Chicago to Porto flight tickets
TAP AIR PORTUGAL
Sep 20
ORD6:00 pmChicago O'Hare Intl
15h 00m
1 stop
OPO3:00 pmPorto
Oct 1
OPO7:00 amPorto
11h 40m
1 stop
ORD12:40 pmChicago O'Hare Intl
$619
TAP AIR PORTUGAL
Sep 23
ORD6:00 pmChicago O'Hare Intl
15h 00m
1 stop
OPO3:00 pmPorto
Oct 7
OPO5:05 amPorto
16h 55m
1 stop
ORD4:00 pmChicago O'Hare Intl
$621
TAP AIR PORTUGAL
Aug 12
ORD6:00 pmChicago O'Hare Intl
17h 00m
1 stop
OPO5:00 pmPorto
Aug 19
OPO9:00 amPorto
33h 40m
1 stop
ORD12:40 pmChicago O'Hare Intl
$626

United Airlines flights from Chicago to Porto

Our best United Airlines deals on Chicago to Porto flight tickets
United Airlines
Nov 15
ORD5:30 pmChicago O'Hare Intl
10h 00m
1 stop
OPO9:30 amPorto
Nov 19
OPO6:00 amPorto
13h 10m
1 stop
ORD1:10 pmChicago O'Hare Intl
$759
United Airlines
Nov 15
ORD11:15 amChicago O'Hare Intl
16h 15m
2 stops
OPO9:30 amPorto
Nov 19
OPO6:00 amPorto
13h 10m
1 stop
ORD1:10 pmChicago O'Hare Intl
$763
United Airlines
Nov 7
ORD6:30 pmChicago O'Hare Intl
33h 00m
1 stop
OPO9:30 amPorto
Nov 17
OPO6:00 amPorto
13h 10m
1 stop
ORD1:10 pmChicago O'Hare Intl
$770

momondo Fare Finder

 
Customize your flight search to find flights from Chicago to Porto 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 July 22, 2026.
Use the filters below to find and compare flights from Chicago to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/20

6:00 pm-3:00 pm

1 stop15h 00m

Porto

Thu 10/1

7:00 am-12:40 pm

1 stop11h 40m

$619

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/23

6:00 pm-3:00 pm

1 stop15h 00m

Porto

Wed 10/7

5:05 am-4:00 pm

1 stop16h 55m

$621

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 8/12

6:00 pm-5:00 pm

1 stop17h 00m

Porto

Wed 8/19

9:00 am-12:40 pm

1 stop33h 40m

$626

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/20

6:00 pm-3:00 pm

1 stop15h 00m

Porto

Thu 10/1

7:00 am-12:40 pm

1 stop11h 40m

$627

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 1/17

1:05 pm-10:30 am

2 stops15h 25m

Porto

Fri 1/22

5:00 am-4:25 pm

2 stops17h 25m

$779

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sat 1/16

1:00 pm-10:35 am

2 stops15h 35m

Porto

Fri 1/22

5:00 am-10:10 pm

2 stops23h 10m

$824

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 1/17

1:00 pm-10:35 am

2 stops15h 35m

Porto

Sat 1/23

5:00 am-4:25 pm

2 stops17h 25m

$825

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 11/15

1:05 pm-9:05 am

2 stops14h 00m

Porto

Sun 11/22

5:55 am-4:50 pm

2 stops16h 55m

$832

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 1/17

1:05 pm-10:30 am

2 stops15h 25m

Porto

Sun 1/24

5:55 am-4:50 pm

2 stops16h 55m

$836

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sat 1/16

1:00 pm-10:30 am

2 stops15h 30m

Porto

Sat 1/23

5:00 am-4:25 pm

2 stops17h 25m

$879

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 Porto from

How to get the cheapest flight ticket from Chicago to Porto

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 typical price of a round-trip flight between Chicago and Porto?

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Chicago, with most prices found around $558. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago during April instead. Flights to Porto in April, while not as cheap as those in January, still average around $610.

How far in advance should I book a flight from Chicago to Porto?

You are more likely to see cheaper flights to Porto from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $802 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Chicago for as low as $621 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 9% on your flight if you consider stops on a Chicago to Porto flight.

When to book flights from Chicago to Porto

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

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

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

Fastest flight time

12h 50m

Direct flights

None
The fastest flight from Chicago to Porto takes 12h 50m
There are no direct flights from Chicago to Porto. There are no popular flight routes from Chicago to Porto.
Search flight deals

Frequently asked questions about flying from Chicago to Porto

  • How far is Chicago to Porto by plane?

    A flight from Chicago to Porto will travel around 3927.7 mi. By plane, this route typically takes 12h 50m.

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

    Prices for flights from Chicago to Porto Airport refresh daily.

  • How many operators does momondo search for flights from Chicago to Porto Airport?

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Chicago to Porto

Compare and see reviews for airlines that fly from Chicago to Porto with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $451Free CancellationRating
7.2
2,342 reviews
Search TAP AIR PORTUGAL flights
LufthansaPriceFrom $474Free CancellationRating
6.8
8,153 reviews
Search Lufthansa flights
United AirlinesPriceFrom $489Free CancellationRating
7.4
10,020 reviews
Search United Airlines flights
IberiaPriceFrom $519Free CancellationRating
7.0
3,258 reviews
Search Iberia flights
American AirlinesPriceFrom $524Free CancellationRating
7.1
11,834 reviews
Search American Airlines flights
KLMPriceFrom $531Free CancellationRating
7.8
1,544 reviews
Search KLM flights
Turkish AirlinesPriceFrom $618Free CancellationRating
7.4
4,449 reviews
Search Turkish Airlines flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Esposende
Lamego
Pinhao
Chaves
Arcos de Valdevez
Guimarães
Viseu
Espinho
Ponte de Lima
Mesao Frio
Penafiel
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Porto?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to Porto. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Chicago to Porto flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Porto from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Chicago to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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