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Cheap flights from Chicago O'Hare Intl Airport to Porto from $232

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 3/9. 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 Chicago O'Hare Intl Airport to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
8:20 pm - 4:55 pm
ORD
-
OPO
15h 35m
1 stop
Scandinavian Airlines Logo
10:25 am - 5:45 pm
OPO
-
ORD
36h 20m
1 stop
$463Scandinavian Airlines
Thu, Mar 19 - Wed, Mar 25
Lufthansa Logo
9:50 pm - 11:40 pm
ORD
-
OPO
19h 50m
1 stop
Lufthansa Logo
12:30 pm - 9:05 pm
OPO
-
ORD
13h 35m
1 stop
$468Lufthansa
Wed, Mar 4 - Wed, Mar 11
TAP AIR PORTUGAL Logo
7:10 pm - 3:05 pm
ORD
-
OPO
13h 55m
1 stop
TAP AIR PORTUGAL Logo
8:55 am - 3:00 pm
OPO
-
ORD
12h 05m
1 stop
$471TAP AIR PORTUGAL
Wed, Feb 4 - Wed, Feb 11
SWISS Logo
2:20 pm - 6:30 pm
ORD
-
OPO
22h 10m
1 stop
SWISS Logo
7:20 pm - 3:55 pm
OPO
-
ORD
26h 35m
1 stop
$477SWISS
Wed, Apr 15 - Thu, Apr 30
Multiple Airlines Logo
12:50 pm - 12:05 pm
ORD
-
OPO
17h 15m
2 stops
Multiple Airlines Logo
6:00 am - 8:05 pm
OPO
-
ORD
20h 05m
1 stop
$486Multiple Airlines
Wed, Feb 18 - Wed, Feb 25
TAP AIR PORTUGAL Logo
7:10 pm - 1:05 pm
ORD
-
OPO
11h 55m
1 stop
TAP AIR PORTUGAL Logo
8:55 am - 2:45 pm
OPO
-
ORD
11h 50m
1 stop
$491TAP AIR PORTUGAL
Wed, Feb 11 - Sun, Feb 15
Multiple Airlines Logo
3:35 pm - 1:15 pm
ORD
-
OPO
15h 40m
2 stops
Multiple Airlines Logo
6:00 am - 2:10 pm
OPO
-
ORD
13h 10m
1 stop
$492Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Lufthansa Logo
10:50 pm - 11:40 pm
ORD
-
OPO
19h 50m
1 stop
Lufthansa Logo
4:15 pm - 2:25 pm
OPO
-
ORD
27h 10m
1 stop
$494Lufthansa
Wed, Mar 11 - Tue, Mar 17
Multiple Airlines Logo
7:15 am - 1:15 pm
ORD
-
OPO
25h 00m
2 stops
Multiple Airlines Logo
7:25 pm - 5:20 pm
OPO
-
ORD
26h 55m
1 stop
$500Multiple Airlines
Wed, Mar 11 - Tue, Mar 17
TAP AIR PORTUGAL Logo
6:00 pm - 8:25 pm
ORD
-
OPO
20h 25m
1 stop
TAP AIR PORTUGAL Logo
9:00 am - 4:00 pm
OPO
-
ORD
13h 00m
1 stop
$501TAP AIR PORTUGAL
Wed, Apr 15 - Wed, Apr 22

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
Mar 4
ORD9:50 pmChicago O'Hare Intl
19h 50m
1 stop
OPO11:40 pmPorto
Mar 11
OPO12:30 pmPorto
13h 35m
1 stop
ORD9:05 pmChicago O'Hare Intl
$468
Lufthansa
Mar 11
ORD10:50 pmChicago O'Hare Intl
19h 50m
1 stop
OPO11:40 pmPorto
Mar 17
OPO4:15 pmPorto
27h 10m
1 stop
ORD2:25 pmChicago O'Hare Intl
$494
Lufthansa
Feb 18
ORD9:50 pmChicago O'Hare Intl
19h 50m
1 stop
OPO11:40 pmPorto
Feb 25
OPO6:00 amPorto
13h 25m
1 stop
ORD1:25 pmChicago O'Hare Intl
$502

TAP AIR PORTUGAL flights from Chicago O'Hare Intl Airport to Porto

Our best TAP AIR PORTUGAL deals on Chicago O'Hare Intl Airport to Porto flight tickets
TAP AIR PORTUGAL
Jan 25
ORD8:25 pmChicago O'Hare Intl
15h 40m
1 stop
OPO6:05 pmPorto
Feb 10
OPO8:00 pmPorto
25h 00m
1 stop
ORD3:00 pmChicago O'Hare Intl
$469
TAP AIR PORTUGAL
Feb 4
ORD7:10 pmChicago O'Hare Intl
13h 55m
1 stop
OPO3:05 pmPorto
Feb 11
OPO8:55 amPorto
12h 05m
1 stop
ORD3:00 pmChicago O'Hare Intl
$471
TAP AIR PORTUGAL
Feb 11
ORD7:10 pmChicago O'Hare Intl
11h 55m
1 stop
OPO1:05 pmPorto
Feb 15
OPO8:55 amPorto
11h 50m
1 stop
ORD2:45 pmChicago O'Hare Intl
$491

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 January 21, 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

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 3/19

8:20 pm-4:55 pm

1 stop15h 35m

Porto

Wed 3/25

10:25 am-5:45 pm

1 stop36h 20m

$463

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/4

9:50 pm-11:40 pm

1 stop19h 50m

Porto

Wed 3/11

12:30 pm-9:05 pm

1 stop13h 35m

$468

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 2/4

7:10 pm-3:05 pm

1 stop13h 55m

Porto

Wed 2/11

8:55 am-3:00 pm

1 stop12h 05m

$471

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/15

2:20 pm-6:30 pm

1 stop22h 10m

Porto

Thu 4/30

7:20 pm-3:55 pm

1 stop26h 35m

$477

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 2/18

12:50 pm-12:05 pm

2 stops17h 15m

Porto

Wed 2/25

6:00 am-8:05 pm

1 stop20h 05m

$486

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 2/11

7:10 pm-1:05 pm

1 stop11h 55m

Porto

Sun 2/15

8:55 am-2:45 pm

1 stop11h 50m

$491

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/4

3:35 pm-1:15 pm

2 stops15h 40m

Porto

Wed 3/11

6:00 am-2:10 pm

1 stop13h 10m

$492

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/11

10:50 pm-11:40 pm

1 stop19h 50m

Porto

Tue 3/17

4:15 pm-2:25 pm

1 stop27h 10m

$494

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 3/11

7:15 am-1:15 pm

2 stops25h 00m

Porto

Tue 3/17

7:25 pm-5:20 pm

1 stop26h 55m

$500

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/15

6:00 pm-8:25 pm

1 stop20h 25m

Porto

Wed 4/22

9:00 am-4:00 pm

1 stop13h 00m

$501

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 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 cheapest month to fly to Porto?

The month of February is, on average, the cheapest month to fly to Porto from Chicago O'Hare Intl Airport, with most prices found around $504. If you aren’t able to travel during the month of February, then book flights to Porto from Chicago O'Hare Intl Airport during January instead. Flights to Porto in January, while not as cheap as those in February, still average around $557.

How far in advance should I book a flight 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 $672 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 $613 on momondo.

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

As of January 2026, prices for Chicago O'Hare Intl Airport to Porto flights are approximately 46% more expensive 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

13h 50m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Porto takes 13h 50m
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

  • 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 13h 50m.

  • 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 $480Free CancellationRating
7.1
2,124 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $488Free CancellationRating
7.0
3,094 reviews
Search Iberia flights
British AirwaysPriceFrom $504Free CancellationRating
6.7
7,689 reviews
Search British Airways flights
LufthansaPriceFrom $507Free CancellationRating
6.8
7,738 reviews
Search Lufthansa flights
KLMPriceFrom $531Free CancellationRating
7.7
1,442 reviews
Search KLM flights
United AirlinesPriceFrom $547Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
American AirlinesPriceFrom $553Free CancellationRating
7.2
11,174 reviews
Search American Airlines flights
SWISSPriceFrom $558Free CancellationRating
7.5
1,855 reviews
Search SWISS flights
DeltaPriceFrom $638Free CancellationRating
7.9
8,089 reviews
Search Delta flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
10,646 reviews
Search Air Canada 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
Matosinhos
Aveiro
Esposende
Lamego
Guimarães
Espinho
Chaves
Pinhao
Arcos de Valdevez
Ponte de Lima
Viseu
Curia
Penafiel
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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