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Cheap flights from Chicago O'Hare Intl Airport to Porto from $323

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 O'Hare Intl Airport to Porto departing on 7/20. 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 O'Hare Intl Airport to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
Scandinavian Airlines Logo
11:55 am - 4:45 pm
OPO
-
ORD
34h 50m
1 stop
$607Scandinavian Airlines
Mon, Nov 2 - Wed, Nov 11
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
Scandinavian Airlines Logo
11:55 am - 4:45 pm
OPO
-
ORD
34h 50m
1 stop
$630Scandinavian Airlines
Mon, Nov 2 - Wed, Nov 11
Scandinavian Airlines Logo
8:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
Scandinavian Airlines Logo
11:55 am - 4:45 pm
OPO
-
ORD
34h 50m
1 stop
$660Scandinavian Airlines
Sat, Oct 31 - Wed, Nov 11
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
Scandinavian Airlines Logo
5:50 pm - 4:45 pm
OPO
-
ORD
28h 55m
1 stop
$677Scandinavian Airlines
Mon, Nov 2 - Thu, Nov 12
Scandinavian Airlines Logo
8:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
Scandinavian Airlines Logo
12:00 pm - 4:45 pm
OPO
-
ORD
34h 45m
1 stop
$690Scandinavian Airlines
Sat, Oct 31 - Sat, Nov 7
Scandinavian Airlines Logo
7:15 pm - 11:05 am
ORD
-
OPO
33h 50m
1 stop
Scandinavian Airlines Logo
5:45 pm - 4:45 pm
OPO
-
ORD
29h 00m
1 stop
$700Scandinavian Airlines
Mon, Nov 2 - Fri, Nov 6
TAP AIR PORTUGAL Logo
8:10 pm - 1:30 pm
ORD
-
OPO
11h 20m
1 stop
TAP AIR PORTUGAL Logo
8:00 pm - 3:30 pm
OPO
-
ORD
25h 30m
1 stop
$713TAP AIR PORTUGAL
Fri, Dec 4 - Thu, Dec 10
Scandinavian Airlines Logo
7:15 pm - 10:00 pm
ORD
-
OPO
20h 45m
2 stops
Scandinavian Airlines Logo
5:45 pm - 4:45 pm
OPO
-
ORD
29h 00m
1 stop
$715Scandinavian Airlines
Sun, Dec 6 - Fri, Dec 11
Scandinavian Airlines Logo
6:50 pm - 11:05 am
ORD
-
OPO
34h 15m
2 stops
Scandinavian Airlines Logo
11:55 am - 4:45 pm
OPO
-
ORD
34h 50m
1 stop
$716Scandinavian Airlines
Mon, Nov 2 - Wed, Nov 11
TAP AIR PORTUGAL Logo
8:10 pm - 7:00 pm
ORD
-
OPO
16h 50m
1 stop
TAP AIR PORTUGAL Logo
8:00 pm - 3:30 pm
OPO
-
ORD
25h 30m
1 stop
$717TAP AIR PORTUGAL
Sun, Nov 1 - Thu, Nov 12

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Lufthansa flights from Chicago O'Hare Intl Airport to Porto

Our best Lufthansa deals on Chicago O'Hare Intl Airport to Porto flight tickets
Lufthansa
Nov 3
ORD10:35 pmChicago O'Hare Intl
17h 50m
1 stop
OPO10:25 pmPorto
Nov 8
OPO6:00 amPorto
20h 05m
1 stop
ORD8:05 pmChicago O'Hare Intl
$744
Lufthansa
Nov 3
ORD4:20 pmChicago O'Hare Intl
17h 00m
1 stop
OPO3:20 pmPorto
Nov 8
OPO6:00 amPorto
20h 05m
1 stop
ORD8:05 pmChicago O'Hare Intl
$745
Lufthansa
Jun 15
ORD4:05 pmChicago O'Hare Intl
17h 35m
1 stop
OPO3:40 pmPorto
Jun 23
OPO11:05 amPorto
31h 30m
1 stop
ORD12:35 pmChicago O'Hare Intl
$1,044

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

Our best Scandinavian Airlines deals on Chicago O'Hare Intl Airport to Porto flight tickets
Scandinavian Airlines
Nov 2
ORD7:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
Nov 11
OPO11:55 amPorto
34h 50m
1 stop
ORD4:45 pmChicago O'Hare Intl
$607
Scandinavian Airlines
Nov 2
ORD7:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
Nov 11
OPO11:55 amPorto
34h 50m
1 stop
ORD4:45 pmChicago O'Hare Intl
$630
Scandinavian Airlines
Oct 31
ORD8:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
Nov 11
OPO11:55 amPorto
34h 50m
1 stop
ORD4:45 pmChicago O'Hare Intl
$660

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 June 9, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$607

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$630

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 10/31

8:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$660

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Thu 11/12

5:50 pm-4:45 pm

1 stop28h 55m

$677

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 10/31

8:15 pm-11:05 am

1 stop33h 50m

Porto

Sat 11/7

12:00 pm-4:45 pm

1 stop34h 45m

$690

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Fri 11/6

5:45 pm-4:45 pm

1 stop29h 00m

$700
Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 12/4

8:10 pm-1:30 pm

1 stop11h 20m

Porto

Thu 12/10

8:00 pm-3:30 pm

1 stop25h 30m

$713

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 12/6

7:15 pm-10:00 pm

2 stops20h 45m

Porto

Fri 12/11

5:45 pm-4:45 pm

1 stop29h 00m

$715

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

6:50 pm-11:05 am

2 stops34h 15m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$716

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/1

8:10 pm-7:00 pm

1 stop16h 50m

Porto

Thu 11/12

8:00 pm-3:30 pm

1 stop25h 30m

$717

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Porto from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport 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 O'Hare Intl Airport, with most prices found around $557. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago O'Hare Intl Airport during April instead. Flights to Porto in April, while not as cheap as those in January, still average around $588.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Porto?

You are more likely to see cheaper flights to Porto from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $728 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Chicago O'Hare Intl Airport for as low as $540 on momondo.

Can stopping save me money on Chicago O'Hare Intl Airport to Porto flights?

You could potentially save up to 30% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Porto flight.

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

As of June 2026, prices for Chicago O'Hare Intl Airport to Porto flights are approximately 22% cheaper when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to Porto

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

Cheap Chicago O'Hare Intl Airport to Porto (ORD to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Porto

Fastest flight time

11h 20m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Porto takes 11h 20m
There are no direct flights from Chicago O'Hare Intl Airport to Porto. There are no popular flight routes from Chicago O'Hare Intl Airport to Porto.
Search flight deals

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

  • How far is Chicago O'Hare Intl to Porto by plane?

    Porto is 3936.9 mi away from Chicago O'Hare Intl. A reasonable flight in good conditions will take 11h 20m.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Porto Airport?

    Prices for flights from Chicago O'Hare Intl Airport to Porto Airport refresh daily.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Porto Airport?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Porto Airport.

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

    The travel and health documents you'll need for your trip to Porto Airport 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 Porto Airport. 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 Chicago O'Hare Intl Airport to Porto?

Best airlines flying from Chicago O'Hare Intl Airport to Porto

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Porto with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $450Free CancellationRating
7.2
2,274 reviews
Search TAP AIR PORTUGAL flights
United AirlinesPriceFrom $497Free CancellationRating
7.4
9,801 reviews
Search United Airlines flights
LufthansaPriceFrom $507Free CancellationRating
6.8
8,052 reviews
Search Lufthansa flights
American AirlinesPriceFrom $524Free CancellationRating
7.1
11,640 reviews
Search American Airlines flights
KLMPriceFrom $531Free CancellationRating
7.8
1,527 reviews
Search KLM flights
IberiaPriceFrom $684Free CancellationRating
7.0
3,232 reviews
Search Iberia 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
Lamego
Chaves
Esposende
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
Curia
Mesao Frio
Mira
Baiao

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Porto. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Porto from Chicago with this policy.

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

Once all potential Chicago to Porto flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Chicago to Porto 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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