What is the most punctual flight time for Chicago to Porto flights?

Generally, flights departing at night tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Sunday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Porto?

Lisbon (LIS) was the most common stop: 48% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Porto?

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $629.

What is the cheapest airline that flies from Chicago O'Hare Intl to Porto?

Air Canada and United Airlines are the most popular carriers operating from Chicago O'Hare Intl to Porto

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Porto?

Newark (EWR) has the shortest average layover time for this route: 1h 08m.

How often are flights from Chicago to Porto delayed?

Historically, on average around 100% of flights between Chicago and Porto have experienced a delay on any given week. The average delay length over the past 12 months has been 319 minutes.

What airlines fly to Porto?

United Airlines, TAP AIR PORTUGAL and Lufthansa are the top three most popular airlines that fly to Porto from Chicago O'Hare Intl Airport according to our data. United Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 8 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Porto?

Flights connecting via Newark (EWR) have the shortest average one-way travel time: 10h 29m.

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?

As of March 2026, there are 8 operators available to choose from 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.

$286 Cheap Flights from Chicago O'Hare Intl Airport to Porto in 2026

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Find the cheapest flights from Chicago O'Hare Intl Airport to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:15 pm - 5:40 pm

ORD

OPO

16h 25m

1 stop

5:55 pm - 4:10 pm

OPO

ORD

28h 15m

1 stop

$443Scandinavian Airlines

Sat, Apr 18 - Fri, May 1

7:15 pm - 5:40 pm

ORD

OPO

16h 25m

1 stop

6:20 pm - 4:10 pm

OPO

ORD

27h 50m

1 stop

$496Scandinavian Airlines

Sat, Apr 18 - Sun, May 3

10:25 pm - 11:25 pm

ORD

OPO

19h 00m

2 stops

7:10 am - 6:15 pm

OPO

ORD

17h 05m

2 stops

$500Multiple Airlines

Fri, Apr 17 - Tue, Apr 21

7:15 pm - 11:10 am

ORD

OPO

33h 55m

1 stop

5:55 pm - 4:10 pm

OPO

ORD

28h 15m

1 stop

$522Scandinavian Airlines

Sat, Apr 18 - Fri, May 1

9:25 pm - 6:05 pm

ORD

OPO

15h 40m

1 stop

6:00 pm - 4:00 pm

OPO

ORD

28h 00m

1 stop

$523TAP AIR PORTUGAL

Sun, Mar 22 - Tue, Mar 31

6:21 pm - 8:45 am

ORD

OPO

56h 24m

2 stops

5:55 pm - 4:10 pm

OPO

ORD

28h 15m

1 stop

$540Scandinavian Airlines

Wed, Apr 15 - Fri, May 1

6:00 pm - 12:40 am

ORD

OPO

24h 40m

1 stop

9:00 am - 4:00 pm

OPO

ORD

13h 00m

1 stop

$551TAP AIR PORTUGAL

Wed, Apr 15 - Wed, Apr 29

6:00 pm - 11:00 am

ORD

OPO

11h 00m

1 stop

10:00 am - 4:00 pm

OPO

ORD

12h 00m

1 stop

$553TAP AIR PORTUGAL

Wed, Apr 22 - Wed, Apr 29

7:15 pm - 11:00 am

ORD

OPO

33h 45m

1 stop

6:20 pm - 4:10 pm

OPO

ORD

27h 50m

1 stop

$566Scandinavian Airlines

Mon, Apr 13 - Sun, Apr 19

6:00 pm - 10:55 am

ORD

OPO

10h 55m

1 stop

9:15 pm - 4:00 pm

OPO

ORD

24h 45m

1 stop

$567TAP AIR PORTUGAL

Sun, Apr 19 - Thu, Apr 30

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

Our best Turkish Airlines deals on Chicago O'Hare Intl Airport to Porto flight tickets

Turkish Airlines

Apr 16

ORD8:10 pmChicago O'Hare Intl

21h 20m

1 stop

OPO11:30 pmPorto

May 6

OPO10:45 amPorto

37h 30m

1 stop

ORD6:15 pmChicago O'Hare Intl

$578

Turkish Airlines

May 3

ORD8:10 pmChicago O'Hare Intl

37h 40m

1 stop

OPO3:50 pmPorto

May 20

OPO4:40 pmPorto

23h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$593

Turkish Airlines

Apr 8

ORD8:10 pmChicago O'Hare Intl

37h 35m

1 stop

OPO3:45 pmPorto

Apr 15

OPO10:45 amPorto

37h 30m

1 stop

ORD6:15 pmChicago O'Hare Intl

$609

Delta flights from Chicago O'Hare Intl Airport to Porto

Our best Delta deals on Chicago O'Hare Intl Airport to Porto flight tickets

Delta

Apr 15

ORD4:50 pmChicago O'Hare Intl

19h 30m

1 stop

OPO6:20 pmPorto

May 7

OPO5:00 amPorto

22h 20m

2 stops

ORD9:20 pmChicago O'Hare Intl

$659

Delta

Apr 13

ORD5:04 pmChicago O'Hare Intl

16h 21m

2 stops

OPO3:25 pmPorto

Apr 19

OPO5:00 amPorto

15h 15m

1 stop

ORD2:15 pmChicago O'Hare Intl

$699

Delta

Apr 8

ORD7:14 pmChicago O'Hare Intl

17h 06m

2 stops

OPO6:20 pmPorto

Apr 15

OPO5:00 amPorto

15h 30m

1 stop

ORD2:30 pmChicago O'Hare Intl

$704

momondo Fare Finder

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

Sat 4/18

7:15 pm-5:40 pm

1 stop16h 25m

Porto

Fri 5/1

5:55 pm-4:10 pm

1 stop28h 15m

$443

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 4/18

7:15 pm-5:40 pm

1 stop16h 25m

Porto

Sun 5/3

6:20 pm-4:10 pm

1 stop27h 50m

$496

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 4/17

10:25 pm-11:25 pm

2 stops19h 00m

Porto

Tue 4/21

7:10 am-6:15 pm

2 stops17h 05m

$500

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 4/18

7:15 pm-11:10 am

1 stop33h 55m

Porto

Fri 5/1

5:55 pm-4:10 pm

1 stop28h 15m

$522

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 3/22

9:25 pm-6:05 pm

1 stop15h 40m

Porto

Tue 3/31

6:00 pm-4:00 pm

1 stop28h 00m

$523

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/15

6:21 pm-8:45 am

2 stops56h 24m

Porto

Fri 5/1

5:55 pm-4:10 pm

1 stop28h 15m

$540

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/15

6:00 pm-12:40 am

1 stop24h 40m

Porto

Wed 4/29

9:00 am-4:00 pm

1 stop13h 00m

$551

Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 4/22

6:00 pm-11:00 am

1 stop11h 00m

Porto

Wed 4/29

10:00 am-4:00 pm

1 stop12h 00m

$553

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 4/13

7:15 pm-11:00 am

1 stop33h 45m

Porto

Sun 4/19

6:20 pm-4:10 pm

1 stop27h 50m

$566

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 4/19

6:00 pm-10:55 am

1 stop10h 55m

Porto

Thu 4/30

9:15 pm-4:00 pm

1 stop24h 45m

$567

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Delays

Layovers

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 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 $693 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 $479 on momondo.

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

You could potentially save up to 6% 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 March 2026, prices for Chicago O'Hare Intl Airport to Porto flights are approximately 18% 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 35m
Direct flights	None

The fastest flight from Chicago O'Hare Intl Airport to Porto takes 13h 35m

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 35m.
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?
As of March 2026, there are 8 operators available to choose from 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?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and Porto, the leading airline is United Airlines, making up 37% of the total bookings. Other popular airlines include TAP AIR PORTUGAL with 26%, Lufthansa with 11%, and Iberia with 9%.

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 PORTUGAL	PriceFrom $450	Free Cancellation	Rating 7.1 2,162 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $497	Free Cancellation	Rating 7.0 3,133 reviews	Search Iberia flights
Lufthansa	PriceFrom $507	Free Cancellation	Rating 6.8 7,843 reviews	Search Lufthansa flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,421 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,469 reviews	Search KLM flights
United Airlines	PriceFrom $552	Free Cancellation	Rating 7.4 9,413 reviews	Search United Airlines flights
British Airways	PriceFrom $563	Free Cancellation	Rating 6.7 7,781 reviews	Search British Airways flights
Delta	PriceFrom $638	Free Cancellation	Rating 7.9 8,278 reviews	Search Delta flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Esposende

Lamego

Chaves

Pinhao

Guimarães

Espinho

Arcos de Valdevez

Viseu

Ponte de Lima

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.

An easier way to manage your Porto trip

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Cheap flights from Chicago O'Hare Intl Airport to Porto from $286

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

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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

What is the cheapest month to fly to Porto?

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

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

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

What is the cheapest airline that flies from Chicago O'Hare Intl to Porto?

What airlines fly to Porto?

How often are flights from Chicago to Porto delayed?

What is the most punctual flight time for Chicago to Porto flights?

What day of the week experiences the fewest flight delays on this route?

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Porto?

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Porto?

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Porto?

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Porto?

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

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

Direct flights

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

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Why use momondo?

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

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List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

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